APPLIED MATERIALS INC /DE
SC 14D1, 1996-11-26
SPECIAL INDUSTRY MACHINERY, NEC
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<PAGE>

                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549

                                SCHEDULE 14D-1
                            TENDER OFFER STATEMENT
                         PURSUANT TO SECTION 14(D)(1)
                    OF THE SECURITIES EXCHANGE ACT OF 1934
                                     AND
                                 SCHEDULE 13D
                  UNDER THE SECURITIES EXCHANGE ACT OF 1934

                                  OPAL, INC.
                          (Name of Subject Company)
                                ORION CORP. I
                           APPLIED MATERIALS, INC.
                                  (Bidders)
                         COMMON STOCK, $.01 PAR VALUE
                        (Title of Class of Securities)
                                 683474-10-0
                    (CUSIP Number of Class of Securities)

                           JOSEPH J. SWEENEY, ESQ.
                           APPLIED MATERIALS, INC.
                               2881 SCOTT BLVD.
                        SANTA CLARA, CALIFORNIA 95050
                                (408) 727-5555
         (Name, Address and Telephone Number of Person Authorized to
           Receive Notices and Communications on behalf of Bidders)

                                   COPY TO:

                               DAVID FOX, ESQ.
                   SKADDEN, ARPS, SLATE, MEAGHER & FLOM LLP
                               919 THIRD AVENUE
                           NEW YORK, NEW YORK 10022
                                (212) 735-3000

                              NOVEMBER 24, 1996
       (Date of Event Which Requires Filing Statement on Schedule 13D)
                          CALCULATION OF FILING FEE
- -----------------------------------------------------------------------------
- -----------------------------------------------------------------------------

                    TRANSACTION VALUATION* $168,990,710.50

                       AMOUNT OF FILING FEE $33,799.00
- -----------------------------------------------------------------------------
- -----------------------------------------------------------------------------

  *    Estimated for purposes of calculating the amount of the filing fee
       only. The amount assumes the purchase of 9,134,633 shares of common
       stock, $.01 par value, of Opal, Inc. (the "Company") (the "Shares"),
       at a price per Share of $18.50 in cash (the "Offer Price"). Such number
       of Shares represents all the Shares outstanding as of November 24, 1996,
       plus 351,050 Shares issuable upon the exercise of outstanding vested
       employee stock options, and up to 40,000 shares which may be issued
       pursuant to the Company's employee stock purchase plan.

 [ ]   Check box if any part of the fee is offset as provided by Rule
       0-11(a)(2) and identify the filing with which the offsetting fee was
       previously paid. Identify the previous filing by registration statement
       number, or the form or schedule and the date of its filing.
       Amount Previously Paid: None
       Form or Registration No.: N/A
       Filing Party: N/A
       Date Filed: N/A

- -----------------------------------------------------------------------------
- -----------------------------------------------------------------------------
                             Page 1 of     Pages
                      Exhibit Index is located on Page 8




    
<PAGE>

CUSIP NO. 683474-10-0

                                          14D-1 AND 13D

<TABLE>
<CAPTION>
<S>    <C>
          Names of Reporting Persons S.S. or I.R.S. Identification Nos. of Above Persons

    1.
          Orion Corp. I

         ---------------------------------------------------------------------------------------------


         Check the Appropriate Box if a Member of a Group                (a) [ ]                  (b) [ ]

    2.

         ---------------------------------------------------------------------------------------------


         SEC Use Only

    3.

         ---------------------------------------------------------------------------------------------


         Source of Funds

    4.
         AF

         ---------------------------------------------------------------------------------------------


         Check Box if Disclosure of Legal Proceedings is Required Pursuant to Items 2(e) or 2(f)     [ ]

    5.

         ---------------------------------------------------------------------------------------------


         Citizenship or Place of Organization

    6.
         Delaware

         ---------------------------------------------------------------------------------------------


         Aggregate Amount Beneficially Owned By Each Reporting Person*

    7.

         4,289,777
         ---------------------------------------------------------------------------------------------


         Check Box if the Aggregate Amount in Row (7) Excludes Certain Shares                        [ ]

    8.

         ---------------------------------------------------------------------------------------------


         Percent of Class Represented By Amount in Row (7)*
    9.

         Approximately 47% of the Shares outstanding on a fully diluted basis as of
         November 24, 1996
         ---------------------------------------------------------------------------------------------


         Type of Reporting Person

   10.

         CO
         ---------------------------------------------------------------------------------------------
</TABLE>

   * See footnote on following page.

                                2



    
<PAGE>

CUSIP NO. 683474-10-0

                                          14D-1 AND 13D

<TABLE>
<CAPTION>
<S>      <C>
         Names of Reporting Person
         S.S. or I.R.S. Identification No. of Above Persons

    1.   Applied Materials, Inc.

         --------------------------------------------------------------------------------------------


         Check the Appropriate Box if a Member of a Group                (a) [ ]                  (b) [ ]
    2.

         --------------------------------------------------------------------------------------------

         SEC Use Only
    3.

         --------------------------------------------------------------------------------------------

         Source of Funds
    4.
         WC or BK

         --------------------------------------------------------------------------------------------

         Check Box if Disclosure of Legal Proceedings is Required Pursuant to Items 2(e) or 2(f)    [ ]
    5.

         --------------------------------------------------------------------------------------------

         Citizenship or Place of Organization
    6.
         Delaware

         --------------------------------------------------------------------------------------------

         Aggregate Amount Beneficially Owned By Each Reporting Person*
    7.
         4,289,777

         --------------------------------------------------------------------------------------------

         Check Box if the Aggregate Amount in Row (7) Excludes Certain Shares                       [ ]
    8.

         --------------------------------------------------------------------------------------------

         Percent of Class Represented By Amount in Row (7)*
    9.
         Approximately 47% of the Shares outstanding on a fully diluted basis as of November 24, 1996

         --------------------------------------------------------------------------------------------

         Type of Reporting Person
   10.

         CO
         --------------------------------------------------------------------------------------------
</TABLE>
- ------------

   *  On November 24, 1996, Applied Materials, Inc. ("Parent") and Orion Corp.
      I, a wholly owned subsidiary of Parent (the "Purchaser"), entered into
      separate Stockholder Agreements (collectively, the "Stockholder
      Agreements"), with each of Rafi Yizhar, the Chief Executive Officer and
      President of the Company and the beneficial owner of an aggregate of
      253,922 Shares, Israel Niv, the General Manager and Executive Vice
      President of Sales and Marketing of the Company and the beneficial owner
      of an aggregate of 101,878 Shares, Clal Electronics Industries Ltd., the
      beneficial owner of an aggregate of 2,692,327 Shares, and Orbotech Ltd.,
      the beneficial owner of an aggregate of 1,241,650 Shares (individually,
      a "Selling Stockholder" and, collectively, the "Selling Stockholders").
      The Selling Stockholders beneficially own an aggregate of 4,289,777
      Shares or approximately 47% of the Company's outstanding Shares on a
      fully diluted basis. Pursuant to the Stockholder Agreements, the Selling
      Stockholders have agreed to validly tender, at the Offer Price, pursuant
      to the Offer (as defined in the Offer to Purchase) and not withdraw all
      Shares which are beneficially owned by the Selling Stockholders prior to
      the expiration date of the Offer. Each of the Stockholder Agreements
      provides that Parent has an irrevocable option to acquire from each
      Selling Stockholder, at the Offer Price, all of such Selling
      Stockholder's Shares if (i) the Offer is terminated, abandoned or
      withdrawn by Parent or the Purchaser (whether due to the failure of any
      of the conditions to the Offer or otherwise), other than at a time when
      Parent or the Purchaser is in material breach of the terms of the
      Agreement and Plan of Merger, dated November 24, 1996, between Parent,
      the Purchaser and the Company (the "Merger Agreement"), or (ii) the
      Merger Agreement is terminated in accordance with its terms, other than
      as a result of certain material breaches by Parent or the Purchaser in
      the terms of the Merger Agreement. Subject to certain conditions
      specified in each of the Stockholder Agreements, such options are
      exercisable in whole but not in part for the 60 day period following the
      first to occur of the foregoing events. Pursuant to the Stockholder
      Agreements, each Selling Stockholder has also delivered a proxy to the
      Purchaser to vote, or grant a consent or approval in respect of, the
      Shares subject to the Stockholder Agreements in favor of the Merger (as
      defined in the Offer to Purchase) and against any transaction with a
      third party that would impede or frustrate the Merger Agreement. The
      Stockholder Agreements are described more fully in Section 12 --
      "Purpose of the Offer, Merger, Merger Agreement and Stockholder
      Agreements" of the Offer to Purchase dated November 26, 1996 (the "Offer
      to Purchase").

                                3



    
<PAGE>

                                 TENDER OFFER

   This Tender Offer Statement on Schedule 14D-1 relates to the offer by the
Purchaser to purchase all outstanding shares of common stock, par value $.01
per share (the "Shares"), of Opal, Inc., a Delaware corporation, at $18.50
per Share, net to the seller in cash, on the terms and subject to the
conditions set forth in the Offer to Purchase, dated November 26, 1996 (the
"Offer to Purchase"), and in the related Letter of Transmittal, copies of
which are attached hereto as Exhibits (a)(1) and (a)(2), respectively (which,
as amended or supplemented from time to time, together constitute the
"Offer"). This Tender Offer Statement on Schedule 14D-1 also constitutes a
Statement on Schedule 13D with respect to the acquisition by Parent and the
Purchaser of beneficial ownership of the Shares subject to the Stockholder
Agreements. The item numbers and responses thereto below are in accordance
with the requirements of Schedule 14D-1.

ITEM 1. SECURITY AND SUBJECT COMPANY.

   (a) The name of the subject company is Opal, Inc., a Delaware corporation
(the "Company"). The address of the Company's principal executive offices is
3050 Bowers Avenue, Santa Clara, California 95054.

   (b) The information set forth in the Introduction of the Offer to Purchase
is incorporated herein by reference.

   (c) The information set forth in Section 6--"Price Range of Shares;
Dividends" of the Offer to Purchase is incorporated herein by reference.

ITEM 2. IDENTITY AND BACKGROUND.

   (a)-(d), (g) This Statement is filed by the Purchaser and Parent. The
information set forth in the Introduction, in Section 9--"Certain Information
Concerning the Purchaser and Parent" and in Schedule I of the Offer to
Purchase is incorporated herein by reference.

   (e)-(f) During the last five years, none of the Purchaser Entities (as
defined in the Offer to Purchase) nor, to their knowledge, any of the persons
listed in Schedule I (Directors and Executive Officers) to the Offer to
Purchase, (i) has been convicted in a criminal proceeding (excluding traffic
violations or similar misdemeanors) or (ii) has been a party to a civil
proceeding of a judicial or administrative body of competent jurisdiction and
as a result of such proceeding was or is subject to a judgment, decree or
final order enjoining future violations of, or prohibiting activities subject
to, federal or state securities laws or finding any violation of such laws.

ITEM 3. PAST CONTACTS, TRANSACTIONS OR NEGOTIATIONS WITH THE SUBJECT COMPANY.

   (a)-(b) The information set forth in the Introduction, in Section
9--"Certain Information Concerning the Purchaser and Parent," in Section
11--"Background of the Offer; Contacts with the Company" and in Section
12--"Purpose of the Offer, Merger, Merger Agreement and Stockholder
Agreements" of the Offer to Purchase is incorporated herein by reference.

ITEM 4. SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION.

   (a)-(b) The information set forth in Section 10--"Source and Amount of
Funds" of the Offer to Purchase is incorporated herein by reference.

   (c) Not applicable.

ITEM 5. PURPOSE OF THE TENDER OFFER AND PLANS OR PROPOSALS OF THE BIDDERS.

   (a)-(g) The information set forth in the Introduction, in Section
7--"Effect of the Offer on the Market for the Shares; Nasdaq Quotation and
Exchange Act Registration" and in Section 12--"Purpose of the Offer, Merger,
Merger Agreement and Stockholder Agreements" of the Offer to Purchase is
incorporated herein by reference.

                                4



    
<PAGE>

ITEM 6. INTEREST IN SECURITIES OF THE SUBJECT COMPANY.

   (a)-(b) The information set forth in the Introduction and in Section
12--"Purpose of the Offer, Merger, Merger Agreement and Stockholder
Agreements" is incorporated herein by reference.

ITEM 7. CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT
        TO THE SUBJECT COMPANY'S SECURITIES.

   The information set forth in the Introduction, in Section 9--"Certain
Information Concerning the Purchaser and Parent," in Section 11--"Background
of the Offer; Contacts with the Company," and in Section 12--"Purpose of the
Offer, Merger, Merger Agreement and Stockholder Agreements" of the Offer to
Purchase is incorporated herein by reference.

ITEM 8. PERSONS RETAINED, EMPLOYED OR TO BE COMPENSATED.

   The information set forth in the Introduction, in Section 16--"Fees and
Expenses" and in Section 17--"Miscellaneous" of the Offer to Purchase is
incorporated herein by reference.

ITEM 9. FINANCIAL STATEMENTS OF CERTAIN BIDDERS.

   The information set forth in Section 9--"Certain Information Concerning
the Purchaser and Parent," of the Offer to Purchase, including the financial
statements and related notes thereto incorporated by reference in Section 9,
is incorporated herein by reference.

   The incorporation by reference herein of the above-referenced financial
information does not constitute an admission that such information is
material to a decision by a stockholder of the Company whether to sell,
tender or hold shares being sought in the Offer.

ITEM 10. ADDITIONAL INFORMATION.

   (a) The information set forth under Introduction, in Section 9--"Certain
Information Concerning the Purchaser and Parent," in Section 11--"Background
of the Offer; Contacts with the Company," and in Section 12--"Purpose of the
Offer, Merger, Merger Agreement and Stockholder Agreements" of the Offer to
Purchase is incorporated herein by reference.

   (b)-(c) The information set forth in Section 12--"Purpose of the Offer,
Merger, Merger Agreement and Stockholder Agreements" and in Section
15--"Certain Legal Matters" of the Offer to Purchase is incorporated herein
by reference.

   (d) The information set forth in Section 7--"Effect of the Offer on the
Market for the Shares; Nasdaq Quotation and Exchange Act Registration" of the
Offer to Purchase is incorporated herein by reference.

   (e) Not applicable.

   (f) The information set forth in the Offer to Purchase and the Letter of
Transmittal, copies of which are attached hereto as Exhibits (a)(1) and
(a)(2), respectively, is incorporated herein by reference.

ITEM 11. MATERIAL TO BE FILED AS EXHIBITS.

   (a)(1) Offer to Purchase, dated November 26, 1996.

   (a)(2) Letter of Transmittal.

   (a)(3) Notice of Guaranteed Delivery.

   (a)(4) Letter to Brokers, Dealers, Commercial Banks, Trust Companies and
Other Nominees.

   (a)(5) Letter to Clients for use by Brokers, Dealers, Commercial Banks,
Trust Companies and Other Nominees.

   (a)(6) Guidelines for Certification of Taxpayer Identification Number on
Substitute Form W-9.

                                5



    
<PAGE>

   (a)(7) Form of Summary Advertisement, dated November 26, 1996.

   (a)(8) Text of Press Release, dated November 24, 1996.

   (a)(9) Text of Press Release, dated November 26, 1996

   (b) None

   (c)(1) Agreement and Plan of Merger, dated as of November 24, 1996, by and
among Parent, the Purchaser and the Company.

   (c)(2) Stockholder Agreement, dated as of November 24, 1996, by and among
Parent, the Purchaser and Rafi Yizhar.

   (c)(3) Stockholder Agreement, dated as of November 24, 1996, by and among
Parent, the Purchaser and Israel Niv.

   (c)(4) Stockholder Agreement, dated as of November 24, 1996, by and among
Parent, the Purchaser and Clal Electronics Industries Ltd.

   (c)(5) Stockholder Agreement, dated as of November 24, 1996, by and among
Parent, the Purchaser and Orbotech Ltd

   (c)(6) Confidentiality and Nondisclosure Agreement, dated October 21,
1996, by and between Parent and the Company.

   (d) None.

   (e) Not applicable.

   (f) None.

                                6



    
<PAGE>

                                  SIGNATURES

   After due inquiry and to the best of my knowledge and belief, the
undersigned certifies that the information set forth in this statement is
true, complete and correct.

Dated: November 26, 1996

                                          ORION CORP. I

                                          BY:  /s/ Nancy H. Handel
                                              -------------------------------
                                              Name: Nancy H. Handel
                                              Title: President and Chief
                                              Executive Officer

                                          APPLIED MATERIALS, INC

                                          BY:  /s/ Joseph J. Sweeney
                                              -------------------------------
                                              Name: Joseph J. Sweeney
                                              Title: Vice President

                                7



    
<PAGE>

                                EXHIBIT INDEX

<TABLE>
<CAPTION>
   EXHIBIT                                                                                     PAGE NO.

- -----------                                                                                   --------

<S>          <C>                                                                              <C>
(a)(1)       Offer to Purchase, dated November 26, 1996 .....................................

(a)(2)       Letter of Transmittal ..........................................................

(a)(3)       Notice of Guaranteed Delivery ..................................................

(a)(4)       Letter to Brokers, Dealers, Commercial Banks, Trust Companies and Other
             Nominees .......................................................................

(a)(5)       Letter to Clients for use by Brokers, Dealers, Commercial Banks, Trust
             Companies and Other Nominees ...................................................

(a)(6)       Guidelines for Certification of Taxpayer Identification Number on Substitute
             Form W-9 .......................................................................

(a)(7)       Form of Summary Advertisement, dated November 26, 1996..........................

(a)(8)       Text of Press Release, dated November 24, 1996 .................................

(a)(9)       Text of Press Release, dated November 26, 1996 .................................

(b)          None ...........................................................................

(c)(1)       Agreement and Plan of Merger, dated as of November 24, 1996, by and among
             Parent, the Purchaser and the Company ..........................................

(c)(2)       Stockholder Agreement, dated as of November 24, 1996, by and among Parent, the
             Purchaser and Rafi Yizhar ......................................................

(c)(3)       Stockholder Agreement, dated as of November 24, 1996, by and among Parent, the
             Purchaser and Israel Niv .......................................................

(c)(4)       Stockholder Agreement, dated as of November 24, 1996, by and among Parent, the
             Purchaser and Clal Electronics Industries Ltd ..................................

(c)(5)       Stockholder Agreement, dated as of November 24, 1996, by and among Parent, the
             Purchaser and Orbotech Ltd .....................................................

(c)(6)       Confidentiality and Nondisclosure Agreement, dated October 21, 1996, by and
             between Parent and the Company .................................................

(d)          None ...........................................................................

(e)          Not applicable .................................................................

(f)          None ...........................................................................
</TABLE>

                                8





<PAGE>

                          OFFER TO PURCHASE FOR CASH
                    ALL OUTSTANDING SHARES OF COMMON STOCK
                                      OF
                                  OPAL, INC.
                                      AT
                             $18.50 NET PER SHARE
                                      BY
                                ORION CORP. I
                         A WHOLLY OWNED SUBSIDIARY OF
                           APPLIED MATERIALS, INC.

        THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT,
              NEW YORK CITY TIME, ON TUESDAY, DECEMBER 24, 1996,
                        UNLESS THE OFFER IS EXTENDED.

   THE OFFER IS CONDITIONED UPON, AMONG OTHER THINGS, THERE BEING VALIDLY
TENDERED AND NOT WITHDRAWN PRIOR TO THE EXPIRATION OF THE OFFER A NUMBER OF
SHARES (AS DEFINED HEREIN) WHICH CONSTITUTES AT LEAST A MAJORITY OF THE
SHARES OUTSTANDING ON A FULLY DILUTED BASIS. THE OFFER IS ALSO SUBJECT TO
OTHER TERMS AND CONDITIONS. SEE SECTION 14.

   THE BOARD OF DIRECTORS OF OPAL, INC. (THE "COMPANY") HAS APPROVED THE
OFFER AND THE MERGER (AS DEFINED HEREIN), HAS DETERMINED THAT THE TERMS OF
THE OFFER AND THE MERGER ARE FAIR TO AND IN THE BEST INTERESTS OF THE
STOCKHOLDERS OF THE COMPANY AND RECOMMENDS THAT STOCKHOLDERS ACCEPT THE OFFER
AND TENDER THEIR SHARES PURSUANT TO THE OFFER.

                                  IMPORTANT

   Any stockholder desiring to tender all or any portion of his shares of
common stock, par value $.01 per share, of the Company (the "Shares"), should
either (a) complete and sign the Letter of Transmittal (or a facsimile
thereof) in accordance with the instructions in the Letter of Transmittal and
mail or deliver it together with the certificate(s) evidencing tendered
Shares, and any other required documents, to the Depositary or tender such
Shares pursuant to the procedures for book-entry transfer set forth in
Section 3 or (b) request such stockholder's broker, dealer, commercial bank,
trust company or other nominee to effect the transaction for such
stockholder. A stockholder whose Shares are registered in the name of a
broker, dealer, commercial bank, trust company or other nominee must contact
such broker, dealer, commercial bank, trust company or other nominee if such
stockholder desires to tender such Shares.

   Any stockholder who desires to tender Shares and whose certificates
evidencing such Shares are not immediately available or who cannot comply
with the procedures for book-entry transfer described in this Offer to
Purchase on a timely basis may tender such Shares by following the procedures
for guaranteed delivery set forth in Section 3.

   Questions and requests for assistance may be directed to the Information
Agent or the Dealer Manager at their respective addresses and telephone
numbers set forth on the back cover of this Offer to Purchase. Requests for
additional copies of this Offer to Purchase, the Letter of Transmittal, the
Notice of Guaranteed Delivery and other tender offer materials may be
directed to the Information Agent. A stockholder may also contact brokers,
dealers, commercial banks and trust companies for assistance concerning this
Offer.
                                ----------------

                     The Dealer Manager for the Offer is:

                             MORGAN STANLEY & CO.
                                 INCORPORATED

NOVEMBER 26, 1996



    
<PAGE>

                              TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                               PAGE

                                                                                            --------

<S>                                                                                         <C>
Introduction ..............................................................................      1

1. Terms of the Offer .....................................................................      3

2. Acceptance for Payment and Payment for Shares ..........................................      4

3. Procedures for Tendering Shares ........................................................      5

4. Withdrawal Rights ......................................................................      7

5. Certain Federal Income Tax Consequences ................................................      8

6. Price Range of Shares; Dividends .......................................................      8

7. Effect of the Offer on the Market for the Shares; Nasdaq Quotation and Exchange Act
   Registration ...........................................................................      9

8. Certain Information Concerning the Company .............................................      9

9. Certain Information Concerning the Purchaser and Parent ................................     11

10. Source and Amount of Funds. ...........................................................     12

11. Background of the Offer; Contacts with the Company ....................................     12

12. Purpose of the Offer, Merger, Merger Agreement and Stockholder Agreements  ............     13

13. Dividends and Distributions ...........................................................     22

14. Conditions to the Offer ...............................................................     22

15. Certain Legal Matters .................................................................     24

16. Fees and Expenses .....................................................................     28

17. Miscellaneous .........................................................................     28

Schedule I--Information Concerning Directors and Executive Officers of Parent and the
          Purchaser .......................................................................    S-1
</TABLE>




    
<PAGE>

To the Holders of Common Stock of
 OPAL, INC.:

INTRODUCTION

   Orion Corp. I, a Delaware corporation (the "Purchaser") and a wholly owned
subsidiary of Applied Materials, Inc., a Delaware corporation ("Parent"),
hereby offers to purchase all outstanding shares of common stock, par value
$.01 per share (the "Shares"), of Opal, Inc., a Delaware corporation (the
"Company"), at $18.50 per Share (the "Offer Price"), net to the seller in
cash, without interest, upon the terms and subject to the conditions set
forth in this Offer to Purchase and in the related Letter of Transmittal
(which, as amended or supplemented from time to time, together constitute the
"Offer").

   Tendering stockholders will not be obligated to pay brokerage fees or
commissions or, except as set forth in Instruction 6 of the Letter of
Transmittal, stock transfer taxes on the purchase of Shares by the Purchaser
pursuant to the Offer. The Purchaser will pay all fees and expenses of Morgan
Stanley & Co. Incorporated, which is acting as the Dealer Manager (the
"Dealer Manager"), Harris Trust Company of New York, which is acting as the
Depositary (the "Depositary"), and Georgeson & Company, Inc., which is acting
as the Information Agent (the "Information Agent"), incurred in connection
with the Offer. See Section 16.

   The Offer is conditioned upon, among other things, there having been
validly tendered and not withdrawn prior to the expiration of the Offer a
number of Shares which constitutes at least a majority of the Shares
outstanding on a fully diluted basis (the "Minimum Condition"). See Section
14.

   The Offer is being made pursuant to an Agreement and Plan of Merger, dated
as of November 24, 1996 (the "Merger Agreement"), by and among the Company,
Parent and the Purchaser. The Merger Agreement provides that, among other
things, following the consummation of the Offer and the satisfaction or
waiver of the other conditions set forth in the Merger Agreement, the
Purchaser will be merged with and into the Company (the "Merger"). At the
effective time of the Merger (the "Effective Time"), each outstanding Share
(other than Shares held in the treasury of the Company, owned by Parent, the
Purchaser or any other wholly owned subsidiary of Parent or held by
stockholders who perfect their appraisal rights under Delaware law) will be
converted into the right to receive the per Share price paid in the Offer,
without interest (referred to herein as the "Merger Consideration"). See
Section 12.

   THE BOARD OF DIRECTORS OF THE COMPANY HAS APPROVED THE OFFER AND THE
MERGER, HAS DETERMINED THAT THE TERMS OF THE OFFER AND THE MERGER ARE FAIR TO
AND IN THE BEST INTERESTS OF THE STOCKHOLDERS OF THE COMPANY AND RECOMMENDS
THAT STOCKHOLDERS ACCEPT THE OFFER AND TENDER THEIR SHARES PURSUANT TO THE
OFFER.

   Robertson, Stephens & Company LLC, the Company's financial advisor
("Robertson Stephens"), has delivered to the Board of Directors of the
Company (the "Company Board") its written opinion to the effect that, as of
the date of such opinion, the Offer Price is fair to the stockholders of the
Company from a financial point of view. Such opinion is set forth in full as
an exhibit to the Company's Solicitation/Recommendation Statement on Schedule
14D-9, which is being mailed to stockholders of the Company herewith.

   The Merger Agreement provides that promptly upon the purchase by Parent or
any of its subsidiaries of Shares pursuant to the Offer that represent at
least a majority of the outstanding Shares on a fully diluted basis, Parent
shall be entitled to designate up to such number of directors, rounded up to
the next whole number, on the Company Board as will give Parent
representation on the Company Board equal to the product of the total number
of directors on the Company Board multiplied by the percentage that the
number of Shares so accepted for payment bears to the total number of Shares
then outstanding. In the Merger Agreement, the Company has agreed to use its
best efforts promptly to cause Parent's designees to be elected as directors
of the Company, including increasing the size of the Company Board or
securing the resignations of incumbent directors or both. Notwithstanding the
foregoing, Parent and the Purchaser have agreed that, until the Effective
Time, the Company Board shall have at least three members who were directors
on the date of the Merger Agreement.

                                1



    
<PAGE>

   The consummation of the merger is subject to the satisfaction or waiver of
certain conditions, including, if required by law, the approval and adoption
of the merger agreement by the requisite vote of the stockholders of the
company. see section 12. Under the company's certificate of incorporation and
delaware law, except as otherwise described below, the affirmative vote of
the holders of a majority of the outstanding shares is required to approve
and adopt the merger agreement and the merger. Consequently, if the purchaser
acquires (pursuant to the offer or otherwise) at least a majority of the then
outstanding shares, the purchaser will have sufficient voting power to
approve and adopt the merger agreement and the merger without the vote of any
other stockholder.

   Under delaware law, if the purchaser acquires, pursuant to the offer or
otherwise, at least 90% of the then outstanding shares, the purchaser will be
able to approve and adopt the merger agreement and the transactions
contemplated thereby, including the merger, without a vote of the company's
stockholders. In such event, parent, the purchaser and the company have
agreed to take, at the request of the purchaser, all necessary and
appropriate action to cause the merger to become effective as soon as
practicable after such acquisition, without a meeting of the company's
stockholders. If, however, the purchaser does not acquire at least 90% of the
then outstanding shares pursuant to the offer or otherwise and a vote of the
company's stockholders is required under delaware law, a significantly longer
period of time will be required to effect the merger. see section 12.

   The merger agreement provides that, following the satisfaction or waiver
of the conditions to the offer, the purchaser will accept for payment, in
accordance with the terms of the offer, all shares validly tendered pursuant
to the offer as soon as it is permitted to do so pursuant to applicable law,
which could be as early as immediately following 12:00 midnight, new york
city time, on tuesday, december 24, 1996. The merger agreement provides that
the purchaser may under certain circumstances, from time to time, extend the
expiration date of the offer beyond the time it would otherwise be required
to accept validly tendered shares for payment. The offer will not remain open
following the time shares are accepted for payment.

   In connection with the execution of the merger agreement, parent and the
purchaser entered into separate stockholder agreements, dated as of november
24, 1996 (collectively, the "stockholder agreements"), with each of rafi
yizhar, the company's chief executive officer and president and the
beneficial owner of an aggregate of 253,922 shares, israel niv, the company's
general manager and executive vice president of sales and marketing and the
beneficial owner of an aggregate of 101,878 shares, clal electronics
industries ltd., the beneficial owner of an aggregate of 2,692,327 shares
("clal "), and orbotech ltd., the beneficial owner of an aggregate of
1,241,650 shares (each, a "selling stockholder" and, collectively, the
"selling stockholders"). The selling stockholders beneficially own an
aggregate of 4,289,777 shares or approximately 47% of the company's
outstanding shares on a fully diluted basis. Pursuant to the stockholder
agreements, the selling stockholders have agreed to validly tender pursuant
to the offer and not withdraw all shares which are beneficially owned by the
selling stockholders prior to the expiration date (as hereinafter defined).
Each of the stockholder agreements provides that parent has an irrevocable
option to acquire from the selling stockholder, at the offer price, all of
such selling stockholder's shares if (i) the offer is terminated, abandoned
or withdrawn by parent or purchaser (whether due to the failure of any of the
conditions to the offer or otherwise), other than at a time when parent or
the purchaser is in material breach of the terms of the merger agreement, or
(ii) the merger agreement is terminated in accordance with its terms, other
than as a result of certain material breaches by parent or the purchaser in
the terms of the merger agreement. Subject to certain conditions specified in
each of the stockholder agreements, such options are exercisable in whole but
not in part for the 60 day period following the first to occur of the
foregoing events. The stockholder agreements are more fully described in
section 12.

   According to the company, as of november 24, 1996 there were 8,743,583
shares outstanding, 351,050 shares reserved for issuance upon the exercise of
outstanding vested employee stock options and up to 40,000 shares issuable in
respect of outstanding employee contributions under the company's employee
stock purchase plan for the period ending december 31, 1996. For purposes of
the offer, "fully diluted basis" assumes that such vested employee stock
options are exercised for shares and that all of such 40,000 shares are
issued pursuant to the company's employee stock purchase plan. Based upon the

                                2



    
<PAGE>

foregoing information, the minimum condition would be satisfied if 4,567,318
shares were validly tendered. assuming the valid tender into the offer of the
4,289,777 shares beneficially owned by the selling stockholders, the
purchaser will need to purchase an additional 277,541 shares to satisfy the
minimum condition.

   THIS OFFER TO PURCHASE AND THE RELATED LETTER OF TRANSMITTAL CONTAIN
IMPORTANT INFORMATION WHICH SHOULD BE READ CAREFULLY BEFORE ANY DECISION IS
MADE WITH RESPECT TO THE OFFER.

1. TERMS OF THE OFFER

   Upon the terms and subject to the conditions of the Offer (including, if
the Offer is extended or amended, the terms and conditions of any extension
or amendment), the Purchaser will accept for payment and pay for all Shares
which are validly tendered prior to the Expiration Date and not withdrawn in
accordance with Section 4. The term "Expiration Date" means 12:00 Midnight,
New York City time, on Tuesday, December 24, 1996, unless and until the
Purchaser, in its sole discretion (but subject to the terms of the Merger
Agreement), shall have extended the period of time during which the Offer is
open, in which event the term "Expiration Date" shall mean to the latest time
and date at which the Offer, as so extended by the Purchaser, shall expire.

   The Offer is conditioned upon, among other things, satisfaction of the
Minimum Condition. See Section 14, which sets forth in full the conditions to
the Offer. If the Minimum Condition is not satisfied or any or all of the
other events set forth in Section 14 shall have occurred or shall be
determined by the Purchaser to have occurred prior to the Expiration Date,
the Purchaser reserves the right (but shall not be obligated) to (i) decline
to purchase any of the Shares tendered in the Offer and terminate the Offer
and return all tendered Shares to the tendering stockholders, (ii) waive any
or all conditions to the Offer, to the extent permitted by applicable law and
the provisions of the Merger Agreement, and, subject to complying with
applicable rules and regulations of the Securities and Exchange Commission
(the "Commission"), purchase all Shares validly tendered, (iii) extend the
Offer and, subject to the right of stockholders to withdraw Shares until the
Expiration Date, retain the Shares which have been tendered during the period
or periods for which the Offer is extended or (iv) subject to the terms of
the Merger Agreement, amend the Offer. The Merger Agreement provides that the
Purchaser will not, without the consent of the Company, decrease the Offer
Price, decrease the numbers of Shares sought in the Offer, amend or waive the
Minimum Condition, or amend any other condition of the Offer in any manner
adverse to the holders of Shares, except that if on the initial expiration
date all conditions to the Offer shall not have been satisfied or waived, the
Offer may be extended from time to time and, if certain required regulatory
approvals have not been obtained, the Offer will be extended for up to twenty
business days. The Merger Agreement provides that if, immediately prior to
the expiration date of the Offer, the Shares tendered and not withdrawn
pursuant to the Offer equal less than 90% of the outstanding Shares, the
Purchaser may extend the Offer for a period not to exceed thirty business
days.

   The Purchaser expressly reserves the right, in its sole discretion, at any
time or from time to time, subject to the terms of the Merger Agreement and
regardless of whether or not any of the events set forth in Section 14 shall
have occurred or shall have been determined by the Purchaser to have
occurred, (i) to extend the period of time during which the Offer is open and
thereby delay acceptance for payment of, and the payment for, any Shares, by
giving oral or written notice of such extension to the Depositary and (ii) to
amend the Offer in any respect by giving oral or written notice of such
amendment to the Depositary. The rights reserved by the Purchaser in this
paragraph are in addition to the Purchaser's rights to terminate the Offer
pursuant to Section 14. Any extension, amendment or termination will be
followed as promptly as practicable by public announcement thereof, the
announcement in the case of an extension to be issued no later than 9:00
a.m., New York City time, on the next business day after the previously
scheduled Expiration Date in accordance with Rules 14d-4(c), 14d-6(d) and
14e-1(d) under the Securities Exchange Act of 1934, as amended (the "Exchange
Act"). Without limiting the obligation of the Purchaser under such rules or
the manner in which the Purchaser may choose to make any public announcement,
the Purchaser currently intends to make announcements by issuing a release to
the Dow Jones News Service.

                                3



    
<PAGE>

   If the Purchaser extends the Offer, or if the Purchaser (whether before or
after its acceptance for payment of Shares) is delayed in its purchase of or
payment for Shares or is unable to pay for Shares pursuant to the Offer for
any reason, then, without prejudice to the Purchaser's rights under the
Offer, the Depositary may retain tendered shares on behalf of the Purchaser,
and such Shares may not be withdrawn except to the extent tendering
stockholders are entitled to withdrawal rights as described in Section 4.
However, the ability of the Purchaser to delay the payment for Shares which
the Purchaser has accepted for payment is limited by Rule 14e-1(c) under the
Exchange Act, which requires that a bidder pay the consideration offered or
return the securities deposited by or on behalf of holders of securities
promptly after the termination or withdrawal of the Offer.

   If the Purchaser makes a material change in the terms of the Offer or the
information concerning the Offer or waives a material condition of the Offer
(including the Minimum Condition, subject to the Merger Agreement), the
Purchaser will disseminate additional tender offer materials and extend the
Offer to the extent required by Rules 14d-4(c) and 14d-6(d) under the
Exchange Act. The minimum period during which the Offer must remain open
following material changes in the terms of the Offer or information
concerning the Offer, other than a change in price or a change in percentage
of securities sought, will depend upon the facts and circumstances, including
the relative materiality of the terms or information. With respect to a
change in price or a change in percentage of securities sought, a minimum ten
business day period is required to allow for adequate dissemination to
stockholders and investor response. If, prior to the Expiration Date, the
Purchaser should decide to increase the price per Share being offered in the
Offer, such increase will be applicable to all stockholders whose Shares are
accepted for payment pursuant to the Offer. The Merger Agreement provides
that, without the Company's consent, the Purchaser will not decrease the
price or the number of Shares sought in the Offer. As used in this Offer to
Purchase, "business day" has the meaning set forth in Rule 14d-1 under the
Exchange Act.

   The Company has provided to the Purchaser its list of stockholders and
security position listings for the purpose of disseminating the Offer to
holders of Shares. This Offer to Purchase and the related Letter of
Transmittal and other relevant materials will be mailed to record holders of
Shares and furnished to brokers, dealers, commercial banks, trust companies
and similar persons whose names, or the names of whose nominees, appear on
the stockholder list or, if applicable, who are listed as participants in a
clearing agency's security position listing, for subsequent transmittal to
beneficial owners of Shares.

2. ACCEPTANCE FOR PAYMENT AND PAYMENT FOR SHARES

   Upon the terms and subject to the conditions of the Offer (including, if
the Offer is extended or amended, the terms and conditions of any extension
or amendment), the Purchaser will purchase, by accepting for payment, and
will pay for, all Shares validly tendered prior to the Expiration Date (and
not properly withdrawn in accordance with Section 4) promptly after the later
to occur of (i) the Expiration Date and (ii) the satisfaction or waiver of
the conditions set forth in Section 14. Subject to the applicable rules of
the Commission and the terms of the Merger Agreement, the Purchaser expressly
reserves the right to delay acceptance for payment of, or payment for, Shares
in order to comply, in whole or in part, with any applicable law, including
the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended (the
"HSR Act"). See Sections 14 and 15.

   In all cases, payment for Shares purchased pursuant to the Offer will be
made only after timely receipt by the Depositary of (i) certificates
evidencing such Shares ("Stock Certificates") or timely confirmation of a
book-entry transfer (a "Book-Entry Confirmation") of such Shares into the
Depositary's account at The Depository Trust Company or the Philadelphia
Depository Trust Company (each, a "Book-Entry Transfer Facility") pursuant to
the procedures set forth in Section 3, (ii) a properly completed and duly
executed Letter of Transmittal (or facsimile thereof) or, in the case of a
book-entry transfer, an Agent's Message (as defined below) and (iii) any
other documents required by the Letter of Transmittal.

   The term "Agent's Message" means a message, transmitted by a Book-Entry
Transfer Facility to, and received by, the Depositary and forming a part of a
Book-Entry Confirmation, which states that such

                                4



    
<PAGE>

Book-Entry Transfer Facility has received an express acknowledgment from the
participant in such Book-Entry Transfer Facility tendering the Shares that
such participant has received and agrees to be bound by the terms of the
Letter of Transmittal and that the Purchaser may enforce such agreement
against the participant.

   For purposes of the Offer, the Purchaser will be deemed to have accepted
for payment, and thereby purchased, tendered Shares if, as and when the
Purchaser gives oral or written notice to the Depositary of the Purchaser's
acceptance of such Shares for payment. Payment for Shares accepted pursuant
to the Offer will be made by deposit of the purchase price with the
Depositary, which will act as agent for tendering stockholders for the
purpose of receiving payments from the Purchaser and transmitting payments to
such tendering stockholders. UNDER NO CIRCUMSTANCES WILL INTEREST ON THE
PURCHASE PRICE FOR SHARES BE PAID BY THE PURCHASER, REGARDLESS OF ANY DELAY
IN MAKING SUCH PAYMENT.

   Upon the deposit of funds with the Depositary for the purpose of making
payments to tendering shareholders, the Purchaser's obligation to make such
payment shall be satisfied and tendering shareholders must thereafter look
solely to the Depositary for payment of amounts owed to them by reason of the
acceptance for payment of Shares pursuant to the Offer.

   If any tendered Shares are not accepted pursuant to the Offer for any
reason, or if Stock Certificates are submitted evidencing more Shares than
are tendered, Stock Certificates evidencing Shares not purchased or tendered
will be returned, without expense to the tendering stockholder (or in the
case of Shares tendered by book-entry transfer into the Depositary's account
at a Book-Entry Transfer Facility pursuant to the procedures set forth in
Section 3, such Shares will be credited to an account maintained at such
Book-Entry Transfer Facility), as promptly as practicable after the
expiration, termination or withdrawal of the Offer.

   The Purchaser reserves the right to transfer or assign, in whole at any
time or in part from time to time, to Parent or to one or more of its
affiliates, the right to purchase all or a portion of the Shares tendered
pursuant to the Offer, but any such transfer or assignment will not relieve
the Purchaser of its obligations under the Offer and will in no way prejudice
the rights of tendering stockholders to receive payment for Shares validly
tendered and accepted for payment pursuant to the Offer.

3. PROCEDURES FOR TENDERING SHARES

   Valid Tender. For Shares to be validly tendered pursuant to the Offer, a
properly completed and duly executed Letter of Transmittal (or facsimile
thereof), with any required signature guarantees, or an Agent's Message (in
the case of any book-entry transfer), and any other required documents, must
be received by the Depositary at its address set forth on the back cover of
this Offer to Purchase prior to the Expiration Date. In addition, either (i)
the Stock Certificates evidencing Shares must be received by the Depositary
along with the Letter of Transmittal or Shares must be tendered pursuant to
the procedures for book-entry transfer described below and a Book-Entry
Confirmation must be received by the Depositary, in each case prior to the
Expiration Date or (ii) the tendering stockholder must comply with the
guaranteed delivery procedures described below.

   Book-Entry Transfer. The Depositary will establish an account with respect
to the Shares at each Book-Entry Transfer Facility for purposes of the Offer
within two business days after the date of this Offer to Purchase, and any
financial institution that is a participant in any of the Book-Entry Transfer
Facilities' systems may make book-entry delivery of Shares by causing a
Book-Entry Transfer Facility to transfer such Shares into the Depositary's
account at a Book-Entry Transfer Facility in accordance with such Book-Entry
Transfer Facility's procedures for transfer. However, although delivery of
Shares may be effected through book-entry transfer at a Book-Entry Transfer
Facility, the Letter of Transmittal (or facsimile thereof), with any required
signature guarantees, or an Agent's Message in connection with a book-entry
delivery of Shares, and any other required documents, must, in any case, be
transmitted to and received by the Depositary at its address set forth on the
back cover of this Offer to Purchase prior to the Expiration Date or the
tendering stockholder must comply with the guaranteed delivery procedures
described below. DELIVERY OF DOCUMENTS TO A BOOK-ENTRY TRANSFER FACILITY IN
ACCORDANCE WITH THE BOOK-ENTRY TRANSFER FACILITY'S PROCEDURES DOES NOT
CONSTITUTE DELIVERY TO THE DEPOSITARY.

                                5



    
<PAGE>

   Signature Guarantees. Signatures on all Letters of Transmittal must be
guaranteed by a participant in the Security Transfer Agents Medallion Program
(each, an "Eligible Institution"), unless the Shares tendered thereby are
tendered (i) by a registered holder of Shares who has not completed either
the box entitled "Special Delivery Instructions" or the box entitled "Special
Payment Instructions" on the Letter of Transmittal, or (ii) for the account
of an Eligible Institution. See Instruction 1 of the Letter of Transmittal.

   If a Stock Certificate is registered in the name of a person other than
the signer of the Letter of Transmittal, or if payment is to be made, or a
Stock Certificate not accepted for payment or not tendered is to be returned,
to a person other than the registered holder(s), then the Stock Certificate
must be endorsed or accompanied by appropriate stock powers, in either case
signed exactly as the name(s) of the registered holder(s) appear on the Stock
Certificate, with the signature(s) on such Stock Certificate or stock powers
guaranteed as described above. See Instructions 1 and 5 of the Letter of
Transmittal.

   THE METHOD OF DELIVERY OF STOCK CERTIFICATES, THE LETTER OF TRANSMITTAL
AND ANY OTHER REQUIRED DOCUMENTS, INCLUDING DELIVERY THROUGH ANY BOOK-ENTRY
TRANSFER FACILITY, IS AT THE OPTION AND RISK OF THE TENDERING STOCKHOLDER AND
THE DELIVERY WILL BE DEEMED MADE ONLY WHEN ACTUALLY RECEIVED BY THE
DEPOSITARY. IF DELIVERY IS BY MAIL, REGISTERED MAIL WITH RETURN RECEIPT
REQUESTED, PROPERLY INSURED, IS RECOMMENDED. IN ALL CASES, SUFFICIENT TIME
SHOULD BE ALLOWED TO ENSURE TIMELY DELIVERY.

   Guaranteed Delivery. If a stockholder desires to tender Shares pursuant to
the Offer and such stockholder's Stock Certificates are not immediately
available or time will not permit all required documents to reach the
Depositary prior to the Expiration Date, or the procedures for book-entry
transfer cannot be completed on a timely basis, such Shares may nevertheless
be tendered if all the following conditions are satisfied:

     (i) the tender is made by or through an Eligible Institution;

     (ii) a properly completed and duly executed Notice of Guaranteed
    Delivery, substantially in the form provided by the Purchaser herewith, is
    received by the Depositary prior to the Expiration Date as provided below;
    and

     (iii) the Stock Certificates for all tendered Shares, in proper form for
    transfer (or a Book-Entry Confirmation), together with a properly
    completed and duly executed Letter of Transmittal (or facsimile thereof),
    with any required signature guarantees (or, in the case of a book-entry
    transfer, an Agent's Message) and any other documents required by the
    Letter of Transmittal, are received by the Depositary within three Nasdaq
    National Market System trading days after the date of execution of the
    Notice of Guaranteed Delivery.

   The Notice of Guaranteed Delivery may be delivered by hand or transmitted
by telegram, facsimile transmission or mail to the Depositary and must
include a guarantee by an Eligible Institution in the form set forth in the
Notice of Guaranteed Delivery.

   Notwithstanding any other provision hereof, payment for Shares purchased
pursuant to the Offer will in all cases be made only after timely receipt by
the Depositary of (i) Stock Certificates evidencing such Shares or a
Book-Entry Confirmation of the delivery of such Shares, (ii) a Letter of
Transmittal (or facsimile thereof), properly completed and duly executed,
with any required signature guarantees (or, in the case of a book-entry
transfer, an Agent's Message) and (iii) any other documents required by the
Letter of Transmittal.

   BACK-UP FEDERAL INCOME TAX WITHHOLDING. TO PREVENT BACKUP FEDERAL INCOME
TAX WITHHOLDING WITH RESPECT TO PAYMENT OF THE PURCHASE PRICE FOR SHARES
PURCHASED PURSUANT TO THE OFFER, EACH TENDERING STOCKHOLDER MUST PROVIDE THE
DEPOSITARY WITH SUCH STOCKHOLDER'S CORRECT TAXPAYER IDENTIFICATION NUMBER AND
CERTIFY THAT SUCH STOCKHOLDER IS NOT SUBJECT TO BACKUP FEDERAL INCOME TAX
WITHHOLDING BY COMPLETING THE SUBSTITUTE FORM W-9 INCLUDED IN THE LETTER OF
TRANSMITTAL. IF BACKUP WITHHOLDING APPLIES WITH RESPECT TO A STOCKHOLDER, THE
DEPOSITARY IS REQUIRED TO WITHHOLD 31% OF ANY PAYMENTS MADE TO SUCH
STOCKHOLDER. SEE INSTRUCTION 9 OF THE LETTER OF TRANSMITTAL.

                                6



    
<PAGE>

   Determination of Validity. All questions as to the validity, form,
eligibility (including time of receipt) and acceptance for payment of any
tendered Shares pursuant to any of the procedures described above will be
determined by the Purchaser, in its sole discretion, whose determination will
be final and binding on all parties. The Purchaser reserves the absolute
right to reject any or all tenders of any Shares determined by it not to be
in proper form or if the acceptance for payment of, or payment for, such
Shares may, in the opinion of the Purchaser's counsel, be unlawful. The
Purchaser also reserves the absolute right, in its sole discretion, subject
to the Merger Agreement, to waive any of the conditions of the Offer or any
defect or irregularity in any tender with respect to Shares of any particular
stockholder, and the Purchaser's interpretation of the terms and conditions
of the Offer (including the Letter of Transmittal and the Instructions
thereto) will be final and binding. None of the Purchaser, Parent, the Dealer
Manager, the Depositary, the Information Agent or any other person will be
under any duty to give notification of any defects or irregularities in
tenders or will incur any liability for failure to give any such
notification.

   Other Requirements. By executing a Letter of Transmittal as set forth
above, a tendering stockholder irrevocably appoints designees of the
Purchaser as the stockholder's attorneys-in-fact and proxies, in the manner
set forth in the Letter of Transmittal, each with full power of substitution,
to the full extent of the stockholder's rights with respect to the Shares
tendered by the stockholder and accepted for payment by the Purchaser (and
any and all other Shares or other securities issued or issuable in respect of
such Shares on or after the date of the Merger Agreement). All such proxies
shall be considered coupled with an interest in the tendered Shares. This
appointment will be effective when, and only to the extent that, the
Purchaser accepts Shares for payment. Upon acceptance for payment, all prior
proxies given by the stockholder with respect to the Shares or other
securities will, without further action, be revoked, and no subsequent
proxies may be given nor any subsequent written consent executed by such
stockholder (and if given or executed, will not be deemed to be effective)
with respect thereto. The designees of the Purchaser will, with respect to
the Shares and other securities, be empowered to exercise all voting and
other rights of such stockholder as they in their sole discretion may deem
proper at any annual, special or adjourned meeting of the Company's
stockholders, by written consent or otherwise. The Purchaser reserves the
right to require that, in order for Shares to be deemed validly tendered,
immediately upon the Purchaser's acceptance for payment of such Shares, the
Purchaser must be able to exercise full voting and other rights of a record
and beneficial holder, including rights in respect of acting by written
consent, with respect to such Shares.

   A tender of Shares pursuant to any one of the procedures described above
will constitute the tendering stockholder's acceptance of the terms and
conditions of the Offer. The Purchaser's acceptance for payment of Shares
tendered pursuant to the Offer will constitute a binding agreement between
the tendering stockholder and the Purchaser upon the terms and subject to the
conditions of the Offer.

4. WITHDRAWAL RIGHTS

   Except as otherwise provided in this Section 4, tenders of Shares made
pursuant to the Offer are irrevocable, provided that Shares tendered pursuant
to the Offer may be withdrawn at any time prior to the Expiration Date and,
unless theretofore accepted for payment by the Purchaser pursuant to the
Offer, may also be withdrawn at any time after January 24, 1997, or at such
later time as may apply if the Offer is extended.

   For a withdrawal to be effective, a written, telegraphic or facsimile
transmission notice of withdrawal must be timely received by the Depositary
at its address set forth on the back cover of this Offer to Purchase. Any
such notice of withdrawal must specify the name of the person who tendered
the Shares to be withdrawn, the number of Shares to be withdrawn and the name
of the registered holder, if different from that of the person who tendered
such Shares. If Stock Certificates evidencing Shares to be withdrawn have
been delivered or otherwise identified to the Depositary, then, prior to the
physical release of such Stock Certificates, the serial numbers of the
particular Stock Certificates and a signed notice of withdrawal with
signatures guaranteed by an Eligible Institution, except in the case of
Shares tendered for the account of an Eligible Institution, must also be
furnished to the Depositary as described above. If Shares have been tendered
pursuant to the procedures for book-entry transfer as set forth in Section 3,
any notice of

                                7



    
<PAGE>

withdrawal must also specify the name and number of the account at the
appropriate Book-Entry Transfer Facility to be credited with the withdrawn
Shares.

   All questions as to the form and validity (including time of receipt) of
notices of withdrawal will be determined by the Purchaser, in its sole
discretion, whose determination will be final and binding. None of the
Purchaser, Parent, the Dealer Manager, the Depositary, the Information Agent
or any other person will be under any duty to give notification of any
defects or irregularities in any notice of withdrawal or incur any liability
for failure to give any such notification.

   ANY SHARES PROPERLY WITHDRAWN WILL BE DEEMED TO NOT HAVE BEEN VALIDLY
TENDERED FOR PURPOSES OF THE OFFER. However, withdrawn Shares may be
re-tendered by following one of the procedures described in Section 3 at any
time prior to the Expiration Date.

5. CERTAIN FEDERAL INCOME TAX CONSEQUENCES

   The receipt of cash for Shares pursuant to the Offer (or the Merger) will
be a taxable transaction for federal income tax purposes and may also be a
taxable transaction under applicable state, local or foreign tax laws. The
tax consequences of such receipt pursuant to the Offer (or the Merger) may
vary depending upon, among other things, the particular circumstances of the
stockholder. In general, a stockholder who receives cash for Shares pursuant
to the Offer (or the Merger) will recognize gain or loss for federal income
tax purposes equal to the difference between the amount of cash received in
exchange for the Shares sold and such stockholder's adjusted tax basis in
such Shares. Provided that the Shares constitute capital assets in the hands
of the stockholder, such gain or loss will be capital gain or loss, and will
be long term capital gain or loss if the holder has held the Shares for more
than one year at the time of sale. With respect to the receipt of cash for
Shares pursuant to the Offer, gain or loss will be recognized by the
stockholder in the tax year in which such Shares are accepted for payment
by the Purchaser (even if the cash is not received by such stockholder until
after the close of such tax year). With respect to the receipt of cash for
Shares pursuant to the Merger, gain or loss will be recognized by the
stockholder at the Effective Time of the Merger (even if the cash is not
received until a later time).

   THE FEDERAL INCOME TAX DISCUSSION SET FORTH ABOVE IS INCLUDED FOR GENERAL
INFORMATION ONLY AND IS BASED UPON PRESENT LAW. STOCKHOLDERS ARE URGED TO
CONSULT THEIR TAX ADVISORS WITH RESPECT TO THE SPECIFIC TAX CONSEQUENCES OF
THE OFFER TO THEM, INCLUDING THE APPLICATION AND EFFECT OF THE ALTERNATIVE
MINIMUM TAX, AND STATE, LOCAL AND FOREIGN TAX LAWS. IN ADDITION, THE
DISCUSSION SET FORTH ABOVE MAY NOT APPLY TO PARTICULAR CATEGORIES OF
STOCKHOLDERS, INCLUDING STOCKHOLDERS WHO ACQUIRED SHARES PURSUANT TO THE
EXERCISE OF EMPLOYEE STOCK OPTIONS OR OTHERWISE AS COMPENSATION, INDIVIDUALS
WHO ARE NOT CITIZENS OR RESIDENTS OF THE UNITED STATES AND FOREIGN
CORPORATIONS, OR ENTITIES THAT ARE OTHERWISE SUBJECT TO SPECIAL TAX
TREATMENT.

6. PRICE RANGE OF SHARES; DIVIDENDS

   The Shares trade on the Nasdaq National Market System under the symbol
"OPAL." The following table sets forth, for the fiscal quarters indicated,
the high and low sales price per Share on the Nasdaq National Market System.
All prices set forth below are as reported in published financial sources:

<TABLE>
<CAPTION>
                                                  MARKET PRICE
                                              ------------------
                                                 HIGH      LOW
                                              --------  --------
<S>                                           <C>       <C>
Year Ended December 31, 1995:
  Second Quarter (since May 18) .............  $20.75    $ 14.00
  Third Quarter .............................   25.25      16.25
  Fourth Quarter ............................   20.25      11.00
Year Ended December 31, 1996:
  First Quarter .............................   14.25     10.375
  Second Quarter ............................   19.25      11.75
  Third Quarter .............................   13.25       6.50
  Fourth Quarter (through November 26, 1996)    18.375      8.00
</TABLE>

                                8



    
<PAGE>

   On November 22, 1996 the last full trading day prior to the announcement
of the terms of the Merger Agreement, the reported closing sales price per
Share on the Nasdaq National Market System was $12 1/8. On November 26, 1996
the last full trading day prior to the commencement of the Offer, the
reported closing sales price per Share on the Nasdaq National Market System
was $18 1/8. STOCKHOLDERS ARE URGED TO OBTAIN A CURRENT MARKET QUOTATION FOR
THE SHARES.

   Since the Company became a public company on May 18, 1995 it has not paid
any dividends on its common stock.

7. EFFECT OF THE OFFER ON THE MARKET FOR THE SHARES; NASDAQ QUOTATION AND
EXCHANGE ACT REGISTRATION

   The purchase of Shares pursuant to the Offer will reduce the number of
Shares that might otherwise trade publicly and the number of holders of
Shares and could adversely affect the liquidity and market value of the
remaining Shares held by the public.

   Depending upon the aggregate market value and per share price of any
Shares not purchased pursuant to the Offer, the Shares may no longer meet the
standards for continued inclusion in the Nasdaq National Market System, which
require that an issuer have at least 200,000 publicly held shares with a
market value of $1 million held by at least 400 stockholders or 300
stockholders holding round lots. If these standards were not met, quotations
might continue to be published in the over-the-counter "additional list" or
in one of the "local lists," but if the number of holders of Shares falls
below 300, or if the number of publicly held Shares falls below 100,000, or
there is not at least two market makers for the Shares, the National
Association of Securities Dealers ("NASD") rules provide that the securities
would no longer be "authorized" for Nasdaq reporting and Nasdaq would cease
to provide any quotations. Shares held directly or indirectly by an officer
or director of the Company, or by any beneficial owner of more than 10
percent of the Shares, ordinarily will not be considered as being publicly
held for this purpose. In the event the Shares were no longer eligible for
Nasdaq quotation, quotations might still be available from other sources. The
extent of the public market for the Shares and availability of such
quotations would, however, depend upon the number of holders of Shares
remaining at such time, the interest in maintaining a market in the Shares on
the part of securities firms, the possible termination of registration under
the Exchange Act, as described below, and other factors.

   The Shares are currently "margin securities" under the regulations of the
Board of Governors of the Federal Reserve System (the "Federal Reserve
Board"), which has the effect, among other things, of allowing brokers to
extend credit on the collateral of the Shares. Depending upon factors similar
to those described above regarding listing and market quotations, following
the Offer it is possible that the Shares would no longer constitute "margin
securities" for the purposes of the margin regulations of the Federal Reserve
Board and therefore could no longer be used as collateral for loans made by
brokers.

   The Shares are currently registered under the Exchange Act. Registration
of the Shares under the Exchange Act may be terminated upon application of
the Company to the Commission if the Shares are not listed on a national
securities exchange or Nasdaq and there are fewer than 300 record holders of
the Shares. Termination of registration of the Shares under the Exchange Act
would reduce substantially the information required to be furnished by the
Company to its stockholders and to the Commission and would make certain
provisions of the Exchange Act, such as the short-swing profit recovery
provisions of Section 16(b), the requirement of furnishing a proxy statement
in connection with stockholders' meetings pursuant to Section 14(a) and the
requirements of Rule 13e-3 under the Exchange Act with respect to "going
private" transactions no longer applicable to the Company. Furthermore, if
the Purchaser acquires a substantial number of Shares or the registration of
the Shares under the Exchange Act were to be terminated, the ability of
"affiliates" of the Company and persons holding "restricted securities" of
the Company to dispose of such securities pursuant to Rule 144 under the
Securities Act of 1933 may be impaired or eliminated. If registration of the
Shares under the Exchange Act were terminated prior to the consummation of
the Merger, the Shares would no longer be "margin securities" or be eligible
for Nasdaq reporting. It is the present intention of the Purchaser to seek to
cause the Company to make an application for termination of registration of
the Shares as soon as possible following the Offer if the requirements for
termination of registration are met.

                                9



    
<PAGE>

8. CERTAIN INFORMATION CONCERNING THE COMPANY

   The information concerning the Company contained in this Offer to
Purchase, including financial information (other than forecasts of the
Company's results of operations provided below), has been taken from or based
upon publicly available documents and records on file with the Commission and
other public sources. Neither Parent nor the Purchaser assumes any
responsibility for the accuracy or completeness of the information concerning
the Company contained in such documents and records or for any failure by the
Company to disclose events which may have occurred or may affect the
significance or accuracy of any such information but which are unknown to
Parent or the Purchaser.

   The Company is a Delaware corporation with its principal executive offices
located at 3203 Scott Boulevard, Santa Clara, California 95054. The telephone
number of the Company at such offices is (408) 727-6060. The Company is a
supplier of CD-SEM systems for use in semiconductor manufacturing.

   Set forth below is a summary of certain consolidated financial information
with respect to the Company, excerpted or derived from the information
contained in the Company's Annual Report on Form 10-K for the fiscal year
ended December 31, 1995, as well as the Company's Quarterly Report on Form
10-Q for the nine months ended September 30, 1996. More comprehensive
financial information is included in such reports and other documents filed
by the Company with the Commission, and the following summary is qualified in
its entirety by reference to such reports and other documents and all of the
financial information (including any related notes) contained therein. Such
reports and other documents may be inspected and copies may be obtained from
the offices of the Commission in the manner set forth below.

                                  OPAL, INC.
                     SELECTED CONSOLIDATED FINANCIAL DATA
               (DOLLARS IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)

<TABLE>
<CAPTION>
                                  NINE MONTHS ENDED
                                    SEPTEMBER 30,          YEAR ENDED DECEMBER 31,
                                --------------------  -------------------------------
                                   1996       1995       1995       1994       1993
                                ---------  ---------  ---------  ---------  ---------
                                     (UNAUDITED)
<S>                             <C>        <C>        <C>        <C>        <C>
STATEMENT OF OPERATIONS DATA:
  Revenues ....................   $47,954    $30,992    $44,736    $24,573    $12,384
  Income from operations  .....     9,195      5,946      8,519      4,304      1,529
  Net income ..................     9,233      6,244      9,074      4,099      1,322
  Net income per Share ........   $  1.01    $  0.80    $  1.10    $  0.61    $  0.23
  Weighted average common
   shares and equivalents  ....     9,104      7,842      8,250      6,678      5,715
</TABLE>

<TABLE>
<CAPTION>
                                                         YEAR ENDED DECEMBER 31,
                                    AT SEPTEMBER 30, -----------------------------
                                          1996          1995       1994      1993
                                   ----------------  ---------  --------  --------
                                      (UNAUDITED)
<S>                                <C>               <C>        <C>       <C>
BALANCE SHEET DATA:
  Working capital ................      $51,077        $42,292   $ 8,619   $ 7,091
  Total assets ...................       67,309         55,252    16,701    11,672
  Long-term debt .................           --             --       475     1,321
  Series E Mandatorily Redeemable
   Preferred Stock ...............           --             --     1,476     1,405
  Stockholders' equity ...........      $56,131        $46,508   $ 9,336   $ 5,143
</TABLE>

   The Company is subject to the information filing requirements of the
Exchange Act and is required to file reports and other information with the
Commission relating to its business, financial condition and other matters.
Information, as of particular dates, concerning the Company's directors and
officers, their remuneration, options granted to them, the principal holders
of the Company's securities and any material interest of such persons in
transactions with the Company is required to be described in proxy statements

                               10



    
<PAGE>

distributed to the Company's stockholders and filed with the Commission.
These reports, proxy statements and other information should be available for
inspection and copying at the Commission's office at 450 Fifth Street, N.W.,
Washington, D.C. 20549, and also should be available for inspection and
copying at the regional offices of the Commission located at Seven World
Trade Center, New York, New York 10048 and Northwestern Atrium Center, 500
West Madison Street, Suite 1400, Chicago, Illinois 60661. Copies of this
material may also be obtained by mail, upon payment of the Commission's
customary fees, from the Commission's principal office at 450 Fifth Street,
N.W., Washington, D.C. 20549. The Commission also maintains an internet web
site at http://www.sec.gov that contains reports, proxy statements and other
information. Copies should also be available at the offices of the NASD, 1735
K Street, N.W. Washington, D.C. 20006.

   During the course of the discussions between Parent and the Company that
led to the execution of the Merger Agreement, the Company provided Parent
with certain information about the Company and its financial performance which
is not publicly available. The information provided included forecasts of the
Company's 1996, 1997, 1998, 1999, 2000 and 2001 results of operations as an
independent company (i.e., without regard to the impact to the Company of a
transaction with Parent), which included the following information: total
revenues, $64.2 million, $65.6 million, $97.4 million, $161.3 million, $220.4
million and $290.7 million, respectively; gross profit, $34.2 million, $35.1
million, $52.1 million, $86.3 million, $117.9 million and $155.5 million,
respectively; and income from operations, $12.0 million, $10.8 million, $16.8
million, $32.4 million, $47.2 million and $62.2 million, respectively. The
foregoing forecasts were prepared by the Company in conjunction with its
financial advisor solely for internal use in connection with the transactions
contemplated by the Merger Agreement and not for publication or with a view to
complying with the published guidelines of the Commission regarding projections
or with the guidelines established by the American Institute of Certified Public
Accountants and are included in this Offer to Purchase only because they were
furnished to Parent. The forecasts necessarily reflect numerous assumptions with
respect to industry
performance, general business and economic conditions and other matters, many
of which are inherently uncertain or beyond the Company's control. One cannot
predict whether the assumptions made in preparing the forecasts will be
accurate, and actual results may be materially higher or lower than those
contained in the forecasts. The inclusion of this information should not be
regarded as an indication that Parent, the Purchaser, the Company, or anyone
who received this information considered it a reliable predictor of future
events, and this information should not be relied on as such. None of Parent,
the Purchaser or the Company assumes any responsibility for the validity,
reasonableness, accuracy or completeness of the forecasts and the Company has
made no representation to Parent or the Purchaser regarding the forecasts
described above.

9. CERTAIN INFORMATION CONCERNING THE PURCHASER AND PARENT

   The Purchaser is a newly incorporated Delaware corporation and a wholly
owned subsidiary of Parent. To date the Purchaser has not conducted any
business other than in connection with the Offer and the Merger. The
principal executive offices of the Purchaser are located at 3050 Bowers
Avenue, Santa Clara, California 95054.

   The name, citizenship, business address, present principal occupation or
employment and five-year employment history of each of the directors and
executive officers of the Purchaser and Parent are set forth in Schedule I
hereto.

   Parent is a Delaware corporation with its principal office located at 3050
Bowers Avenue, Santa Clara, California 95054. Parent's principal line of
business is the development, manufacture, marketing and servicing of
semiconductor wafer fabrication equipment and related spare parts.

   Until immediately prior to the time the Purchaser purchases Shares
pursuant to the Offer, it is not anticipated that the Purchaser will have any
significant assets or liabilities or engage in activities other than those
incident to its formation and capitalization and the transactions
contemplated by the Offer and the Merger. Because the Purchaser is a newly
formed corporation and has minimal assets and capitalization, no meaningful
financial information regarding the Purchaser is available.

   Financial information with respect to Parent and its subsidiaries is
included in Parent's Annual Report on Form 10-K for the fiscal year ended
October 29, 1995, which is incorporated herein by

                               11



    
<PAGE>

reference, and other documents filed by Parent with the Commission. Such
reports and other documents should be available for inspection and copies
thereof should be obtainable in the manner set forth below under "Available
Information."

   Available Information. Parent is subject to the informational filing
requirements of the Exchange Act and is required to file reports and other
information with the Commission relating to its business, financial condition
and other matters. Information, as of particular dates, concerning Parent's
directors and officers, their remuneration, options granted to them, the
principal holders of Parent's securities and any material interest of such
persons in transactions with Parent is required to be described in proxy
statements distributed to Parent's stockholders and filed with the
Commission. Such reports, proxy statements and other information may be
inspected and copies may be obtained from the offices of the Commission in
the same manner as set forth with respect to information concerning the
Company in Section 8. Such material should also be available at the offices
of the NASD, 1735 K Street, N.W., Washington, D.C. 20006.

   Except as set forth in this Offer to Purchase, none of the Purchaser or
Parent (collectively, the "Purchaser Entities"), or, to the best knowledge of
any of the Purchaser Entities, any of the persons listed on Schedule I, has
any contract, arrangement, understanding or relationship with any other
person with respect to any securities of the Company, including, but not
limited to, any contract, arrangement, understanding or relationship
concerning the transfer or the voting of any securities of the Company, joint
ventures, loan or option arrangement, puts or calls, guarantees of loans,
guarantees against loss or the giving or withholding of proxies. Except as
set forth in this Offer to Purchase, none of the Purchaser Entities, or, to
the best knowledge of any of the Purchaser Entities, any of the persons
listed on Schedule I, has had any business relationships or transactions with
the Company or any of its executive officers, directors or affiliates that
would require reporting under the rules of the Commission. Except as set
forth in this Offer to Purchase, there have been no contacts, negotiations or
transactions between the Purchaser Entities, or their respective subsidiaries
or, to the best knowledge of any of the Purchaser Entities, any of the
persons listed on Schedule I, and the Company or its affiliates, concerning a
merger, consolidation or acquisition, tender offer or other acquisition of
securities, election of directors or a sale or other transfer of a material
amount of assets. Except as set forth in this Offer to Purchase, none of the
Purchaser Entities or, to the best knowledge of any of the Purchaser
Entities, any of the persons listed on Schedule I, beneficially owns any
Shares or has effected any transactions in the Shares in the past 60 days.

10. SOURCE AND AMOUNT OF FUNDS

   The total amount of funds required by the Purchaser to purchase all of the
Shares pursuant to the Offer and to pay related fees and expenses is
approximately $171 million. The Purchaser plans to obtain all funds needed
for the Offer and the Merger through a capital contribution from Parent.
Parent plans to obtain such funds from cash accounts, under available lines
of credit or pursuant to the issuance of debt securities. No final decisions
have been made by Parent concerning the source of funds to be used for
purchase of the Shares. However, the Offer is not conditioned on obtaining
financing.

11. BACKGROUND OF THE OFFER; CONTACTS WITH THE COMPANY

     Between August and November 1995, Mr. Mendy Erad, the Company's Chairman
and the Managing Director of Clal, discussed with Dr. Dan Maydan, the President
of Parent, Clal's view of the strategic opportunities in the metrology and
inspection business (the "M&I Business") in Israel, including the benefit to
the global competitiveness of certain participants that might result from an
industry consolidation.  Dr. Maydan joined the Company Board in November 1995.
Since December 1995, Mr. Erad and Mr. Dennis Hunter, Managing Director,
Corporate Development of Parent, discussed from time-to-time the possibilities
of enhancing Clal's and initiating Parent's participation in the M&I Business,
including by forming a joint venture to acquire interests in various companies
(including the company) engaged in the M&I Business principally in Israel.

   Discussions continued during the Spring of 1996 regarding various
participation opportunities and the goals of the respective companies. During
July 1996, Mr. James C. Morgan, the Chairman and Chief

                               12



    
<PAGE>

Executive Officer of Parent, informed Mr. Erad of Parent's decision to
explore a direct participation in the M&I Business alone rather than through a
joint venture with Clal.

Notwithstanding Parent's July decision, during August and September 1996,
Mr. Erad and legal counsel and a tax advisor met with representatives of
Parent, together with representatives of Parent's financial advisors and
legal counsel, to discuss alternative transaction approaches that would
enable Clal to participate with Parent in the M&I Business, including
through the possible acquisition of the Company. Following these meetings,
Clal determined that the complexity and timing of a collaborative transaction
involving Clal and Parent would not be in the best interests of the Company
and its stockholders, and Parent reaffirmed its conclusion that it would not
be in Parent's best interests to include Clal in its contemplated efforts to
enter the M&I Business.

   On October 20, 1996, the Company engaged Robertson Stephens and Evergreen
Capital Markets, Ltd. to assist the Company in its evaluation of any offer
which might be made by Parent.

   On October 21, 1996, Parent and the Company entered into a confidentiality
agreement preceding Parent's review of certain confidential information
concerning the Company. Subsequently, there were meetings in the United States
and Israel to review and analyze Company information.

   During meetings in late October and early November 1996, representatives
of Parent's financial advisors met with the Company's financial advisors to
discuss valuation parameters of the Company. In addition, a representative
of Parent's legal counsel met with representatives of the Company's legal
counsel to discuss generally the terms and conditions of a possible
transaction between Parent and the Company. At these meetings, Parent's
financial advisors and legal counsel stated that it was an express condition
to Parent's willingness to enter into an agreement to acquire the Company that
there be an agreement along the lines of the Stockholder Agreements.

   At a meeting on November 10, 1996, representatives of Parent and the
Company began negotiating the terms of a definitive agreement providing for
Parent's acquisition of the Company. Following further negotiations on
November 11, 1996, representatives of Parent indicated that they would be
prepared to recommend to Parent's Board of Directors that Parent pay a price
of $18.50 per Share in cash to acquire the Company, conditioned upon the
willingness of the Selling Stockholders to sign the Stockholder Agreements
providing for the sale of the Shares owned by each of them to Parent at a
price per Share equal to the price paid in the Offer, through a tender of such
Shares in the Offer or otherwise.

   Negotiations between Parent and the Company continued through November 22,
1996, culminating in Parent and the Company agreeing upon a form of Merger
Agreement and a form of the Stockholder Agreements which were presented to
and approved by Parent's Board of Directors at a meeting held on November 22,
1996, subject to the finalization of certain open items.

   After completion of final negotiations, a meeting of the Company Board was
held on November 24, 1996, at which Robertson Stephens delivered its opinion
as to the fairness of the Offer Price to the Company's stockholders
from a financial point of view and the definitive Merger Agreement and
Stockholder Agreements were approved by the Company Board, with Dr. Maydan and
Mr. Zvi Lapidot, the Chairman of Orbot Instruments Ltd., a privately-held
Israeli company ("Orbot Instruments"), and Messrs. Rafi Yizhar and Israel Niv,
two of the Selling Stockholders, not participating in the vote of the Company
Board relating to the Merger Agreement and the Stockholder Agreements and the
transactions contemplated thereby. Following this approval, the Merger
Agreement and the Stockholder Agreements were executed, and the transactions
were publicly announced before financial markets opened on November 25, 1996.

   In addition, on November 24, 1996, Parent entered into an agreement to
acquire all of the outstanding capital stock of Orbot Instruments for
$110 million. Certain stockholders of the Company have stockholders that are
also stockholders of Orbot Instruments.

12. PURPOSE OF THE OFFER, MERGER, MERGER AGREEMENT AND STOCKHOLDER AGREEMENTS

   The purpose of the Offer, the Merger, the Merger Agreement and the
Stockholder Agreements is to enable Parent to acquire control of, and the
entire equity interest in, the Company. Upon consummation of the Merger, the
Company will become a subsidiary of Parent. The Offer and the Stockholder
Agreements are intended to increase the likelihood that the Merger will be
effected.

                               13



    
<PAGE>

   MERGER AGREEMENT. The following is a summary of certain provisions of the
Merger Agreement. The summary is qualified in its entirety by reference to
the Merger Agreement which is incorporated herein by reference and a copy of
which has been filed with the Commission as an exhibit to Parent's and the
Purchaser's Tender Offer Statement on Schedule 14D-1 (the "Schedule 14D-1").
The Merger Agreement may be examined and copies may be obtained at the places
and in the manner set forth in Section 8 of this Offer to Purchase.

   The Offer. The Merger Agreement provides that the Purchaser will commence
the Offer and that, upon the terms and subject to prior satisfaction or
waiver of the conditions of the Offer, the Purchaser will purchase all Shares
validly tendered pursuant to the Offer. The Merger Agreement provides that,
without the written consent of the Company, the Purchaser will not decrease
the Offer Price, decrease the number of Shares sought in the Offer, amend or
waive the Minimum Condition, or amend any condition of the Offer in a manner
adverse to the holders of Shares (other than with respect to insignificant
changes or amendments and subject to certain conditions in the Merger
Agreement), except that if on the initial scheduled expiration date all
conditions to the Offer shall not have been satisfied or waived, the
Purchaser may (and under certain circumstances will be required to) extend
the expiration date. The Merger Agreement provides that if, immediately prior
to the expiration date of the Offer, as it may be extended, the Shares
tendered and not withdrawn pursuant to the Offer equal less than 90% of the
Shares outstanding, the Purchaser may extend the Offer for a period not to
exceed 30 business days.

   The Merger. Following the consummation of the Offer, the Merger Agreement
provides that, subject to the terms and conditions thereof, and in accordance
with Delaware law, at the Effective Time, the Purchaser will be merged with
and into the Company. As a result of the Merger, the separate corporate
existence of the Purchaser will cease and the Company will continue as the
surviving corporation (the "Surviving Corporation").

   The respective obligations of Parent and the Purchaser, on the one hand,
and the Company, on the other hand, to effect the Merger are subject to the
satisfaction on or prior to the Closing Date (as defined in the Merger
Agreement) of each of the following conditions, any and all of which may be
waived in whole or in part, to the extent permitted by applicable law: (i)
the Merger Agreement shall have been approved and adopted by the requisite
vote of the holders of Shares, if required by applicable law, in order to
consummate the Merger; (ii) no law, statute, rule, order, decree or
regulation shall have been enacted or promulgated by any government or any
governmental agency or authority of competent jurisdiction which declares the
Merger Agreement invalid or unenforceable in any material respect or which
prohibits the consummation of the Merger, and all governmental consents,
orders and approvals required for the consummation of the Merger and the
transactions contemplated by the Merger Agreement shall have been obtained
and shall be in effect at the Effective Time; (iii) Parent, the Purchaser or
their affiliates shall have purchased Shares pursuant to the Offer, unless
such failure to purchase is as a result of a breach of Parent's and the
Purchaser's obligations under the Merger Agreement; and (iv) the applicable
waiting period under the HSR Act shall have expired or been terminated.

   At the Effective Time of the Merger (i) each issued and outstanding Share
(other than Shares that are owned by the Company as treasury stock, any
Shares owned by Parent, the Purchaser or any other wholly owned subsidiary of
Parent, or any Shares which are held by stockholders exercising appraisal
rights under Delaware law) will be converted into the right to receive the
Merger Consideration and (ii) each issued and outstanding share of the
Purchaser will be converted into one share of common stock of the Surviving
Corporation.

   The Company's Board of Directors. The Merger Agreement provides that
promptly after the purchase by Parent of at least a majority of the
outstanding Shares (on a fully diluted basis), Parent will be entitled to
designate such number of directors, rounded up to the next whole number, on
the Company Board as is equal to the product of the total number of directors
on the Company Board multiplied by the percentage that the number of Shares
so accepted for payment bears to the total number of Shares then outstanding.
The Company will, upon request of the Purchaser, use its best reasonable
efforts promptly to either increase the size of the Company Board or secure
the resignations of such number of its incumbent directors as is necessary to
enable Parent's designees to be elected to the Company Board. In the event
that Parent's designees are elected to the Company Board, until the Effective
Time, the

                               14



    
<PAGE>

Company Board will have at least three directors who are directors on the
date of the Merger Agreement. The Company's obligation to appoint the
Purchaser's designees to the Board of Directors is subject to compliance with
Section 14(f) of the Exchange Act and Rule 14f-1 promulgated thereunder.

   Stockholders Meeting. Pursuant to the Merger Agreement, the Company will,
if required by applicable law in order to consummate the Merger, duly call,
give notice of, convene and hold a special meeting of its stockholders (the
"Special Meeting") as soon as practicable following the acceptance for
payment and purchase of Shares by the Purchaser pursuant to the Offer for the
purpose of considering and taking action upon the Merger Agreement. The
Merger Agreement provides that the Company will, if required by applicable
law in order to consummate the Merger, prepare and file with the Commission a
preliminary proxy or information statement (the "Proxy Statement") relating
to the Merger and the Merger Agreement and use its reasonable efforts (i) to
obtain and furnish the information required to be included by the Commission
in the Proxy Statement and, after consultation with Parent, to respond
promptly to any comments made by the Commission with respect to the
preliminary Proxy Statement and cause a definitive Proxy Statement to be
mailed to its stockholders and (ii) to obtain the necessary approvals of the
Merger and the Merger Agreement by its stockholders. If the Purchaser
acquires at least a majority of the outstanding Shares, the Purchaser will
have sufficient voting power to approve the Merger, even if no other
stockholder votes in favor of the Merger. The Company has agreed, subject to
the provisions described below under "No Solicitation," to include in the
Proxy Statement the recommendation of the Company Board that stockholders of
the Company vote in favor of the approval of the Merger and the adoption of
the Merger Agreement. Parent has agreed that it will vote, or cause to be
voted, all of the Shares then owned by it, the Purchaser or any of its other
subsidiaries and affiliates in favor of the approval of the Merger and the
adoption of the Merger Agreement.

   The Merger Agreement provides that in the event that Parent, the Purchaser
or any other subsidiary of Parent acquires at least 90% of the outstanding
Shares, pursuant to the Offer or otherwise, Parent, the Purchaser and the
Company will, at the request of Parent and subject to the terms of the Merger
Agreement, take all necessary and appropriate action to cause the Merger to
become effective as soon as practicable after such acquisition, without a
meeting of stockholders of the Company, in accordance with Delaware law.

   Options. Pursuant to the Merger Agreement, effective as of the Effective
Time, and subject to the receipt of certain Israeli governmental approvals
and exemptions, Parent and the Company will cause each outstanding unvested
employee stock option to purchase Shares (the "Unvested Options") granted
under the Company's stock option plans (collectively, the "Option Plan") to
be assumed by Parent and converted into an option (or a new substitute option
will be granted) (a "Parent Option") to purchase shares of common stock, par
value $.01 per share (the "Parent Common Stock"), of Parent. Pursuant to the
Merger Agreement (i) the number of shares of Parent Common Stock subject to
each such Parent Option will be determined by multiplying the number of
Shares subject to the Unvested Option to be cancelled by the Option Exchange
Ratio (as defined below), rounding any fractional share up to the nearest
whole share, and (ii) the exercise price per share of such Parent Option will
be determined by dividing the exercise price per share under the Unvested
Option in effect immediately prior to the Effective Time by the Option
Exchange Ratio, and rounding the exercise price thus determined up to the
nearest whole cent, subject to appropriate adjustments for stock splits and
other similar events. See Section 15. Except as provided above, the converted
or substituted Parent Options will be subject to the same terms and
conditions (including, without limitation, expiration date, vesting and
exercise provisions) as were applicable to the Unvested Options immediately
prior to the Effective Time. The issuance of Parent Options as provided above
is subject to, and conditioned upon, obtaining an exemption by the Israeli
Securities Authority from the prospectus delivery requirement under Israeli
securities laws. In the event such exemption is not obtained, unless Parent
elects to comply with the applicable requirements of the Israeli securities
laws, all Unvested Options held by the 35 persons holding the greatest
aggregate amount of Unvested Options will be treated as described above and
exchanged for Parent Options and the remaining Unvested Options will be
treated in the same manner as the Vested Options (as defined below) described
below. For purposes of the Merger Agreement, the "Option Exchange Ratio" is
(x) the Offer Price divided by (y) the average of the closing prices of the
Parent Common Stock on the Nasdaq National Market System during the ten
trading days preceding the fifth trading day prior to the Closing Date.

                               15



    
<PAGE>

   Immediately before the Effective Time, each outstanding fully vested
employee stock option to purchase Shares (a "Vested Option," and together
with an Unvested Option, a "Company Option") granted under the Option Plan,
subject to certain limited exceptions and subject to the receipt of certain
Israeli governmental approvals and exemptions, will be surrendered to the
Company and will be cancelled and the Company or the Surviving Corporation
will pay to each holder of a Vested Option, by check, an amount equal to (i)
the product of the number of the Shares which are issuable upon exercise of
such Vested Option, multiplied by the Offer Price, less (ii) the aggregate
exercise price of such Vested Option.

   In addition, except as may be otherwise agreed to by Parent or the
Purchaser and the Company, the Option Plan and the Company's 1995 Employee
Stock Purchase Plan (the "Stock Purchase Plan") will terminate as of the
Effective Time and the provisions in any other plan, program or arrangement
providing for the issuance or grant of any other interest in respect of the
capital stock of the Company or any of its subsidiaries will be deleted as of
the Effective Time. However, each participant in the Stock Purchase Plan will
be entitled to receive, pursuant to the Stock Purchase Plan, a number of
Shares based upon such participant's contributions in accordance with the
provisions of the Stock Purchase Plan for the Purchase Period (as defined in
the Stock Purchase Plan) ending December 31, 1996, or such part of such
Purchase Period as has been completed at the Effective Time, and at the
applicable purchase price per Share determined in accordance with the
provisions of the Stock Purchase Plan for such Purchase Period, provided that
no such participant will be entitled to increase his or her rate of
contribution after the date of the Merger Agreement, and the Shares so
purchased will immediately be exchanged for cash pursuant to the Merger.

   Interim Operations. Pursuant to the Merger Agreement, the Company has
agreed that, except as expressly contemplated or provided by the Merger
Agreement or agreed to in writing by Parent, prior to the time the directors
of the Purchaser constitute a majority of the Company Board, the business of
the Company and its subsidiaries will be conducted only in the ordinary and
usual course and to the extent consistent therewith, each of the Company and
its subsidiaries will use its best efforts to preserve its business
organization intact and maintain its existing relations with customers,
suppliers, employees, creditors and business partners, and (a) the Company
will not, directly or indirectly, (i) sell, transfer or pledge, or agree to
sell, transfer or pledge, any treasury stock of the Company or any capital
stock of any of its subsidiaries beneficially owned by it; (ii) amend its
certificate of incorporation or by-laws or similar organizational documents;
or (iii) split, combine or reclassify the outstanding Shares or preferred
stock or any outstanding capital stock of any of the subsidiaries of the
Company; and (b) neither the Company nor any of its subsidiaries shall (i)
declare, set aside or pay any dividend or other distribution payable in cash,
stock or property with respect to its capital stock; (ii) issue, sell,
pledge, dispose of or encumber any additional shares of, or securities
convertible into or exchangeable for, or options, warrants, calls,
commitments or rights of any kind to acquire, any shares of capital stock of
any class of the Company or its subsidiaries, other than shares reserved for
issuance on November 24, 1996 pursuant to the exercise of Company Options
outstanding on November 24, 1996 or pursuant to the Stock Purchase Plan;
(iii) transfer, lease, license, sell, mortgage, pledge, dispose of, or
encumber any material assets other than in the ordinary and usual course of
business and consistent with past practice, or incur or modify any material
indebtedness or other liability, other than in the ordinary and usual course
of business and consistent with past practice; (iv) redeem, purchase or
otherwise acquire directly or indirectly any of its capital stock, except
pursuant to stock restriction agreements with employees existing on November
24, 1996; (v) grant any increase in the compensation payable or to become
payable by the Company or any of its subsidiaries to any of its executive
officers or key employees, except inflationary increases given in accordance
with past practice or adopt any new or amend or otherwise increase or
accelerate the payment or vesting of the amounts payable or to become payable
under any existing bonus, incentive compensation, deferred compensation,
severance, profit sharing, stock option, stock purchase, insurance, pension,
retirement or other employee benefit plan, agreement or arrangement
including, without limitation, the Option Plan and the Stock Purchase Plan;
(vi) enter into any employment or severance agreement with, or, except in
accordance with the existing written policies of the Company, grant any
severance or termination pay to any officer, director or employee of the
Company or any of its subsidiaries; (vii) modify, amend or terminate any of
its material contracts or waive, release or assign any material rights or
claims, except in the ordinary course of business and consistent with past
practice; (viii) permit any material insurance policy naming it as a
beneficiary or a loss payable payee to be cancelled or terminated without
notice to Parent, except in the ordinary course of business and consistent
with past practice; (ix)

                               16



    
<PAGE>

incur or assume any long-term debt, or, except in the ordinary course of
business, incur or assume any short-term indebtedness in amounts not
consistent with past practice; (x) assume, guarantee, endorse or otherwise
become liable or responsible (whether directly, contingently or otherwise)
for the obligations of any other person, except in the ordinary course of
business and consistent with past practice; (xi) make any loans, advances or
capital contributions to, or investments in, any other person (other than to
wholly owned subsidiaries of the Company); (xii) enter into any material
commitment or transaction (including, but not limited to, any borrowing,
capital expenditure or purchase, sale or lease of assets or real estate);
(xiii) change any of the accounting methods used by it unless required by
generally accepted accounting principles; (xiv) pay, discharge or satisfy any
claims, liabilities or obligations (absolute, accrued, asserted or
unasserted, contingent or otherwise), other than the payment, discharge or
satisfaction, in the ordinary course of business and consistent with past
practice of claims, liabilities or obligations reflected or reserved against
in, or contemplated by, the consolidated financial statements (or the notes
thereto) of the Company and its consolidated subsidiaries; (xv) adopt a plan
of complete or partial liquidation, dissolution, merger, consolidation,
restructuring, recapitalization or other reorganization of the Company or any
of its subsidiaries (other than the Merger); (xvi) take, or agree to commit
to take, any action that would or is reasonably likely to result in any of
the conditions to the Offer or any of the conditions to the Merger not being
satisfied, or would make any representation or warranty of the Company
contained in the Merger Agreement inaccurate in any respect at, or as of any
time prior to, the Effective Time, or that would materially impair the
ability of the Company to consummate the Offer or the Merger in accordance
with the terms of the Merger Agreement or materially delay such consummation;
or (xvii) enter into an agreement, contract, commitment or arrangement to do
any of the foregoing, or to authorize, recommend, propose or announce an
intention to do any of the foregoing.

   No Solicitation. In the Merger Agreement, the Company has agreed that
neither the Company nor any of its subsidiaries will (and the Company will
use its best efforts to cause its officers, directors, employees,
representatives and agents, including, but not limited to, investment
bankers, attorneys and accountants, not to), directly or indirectly,
encourage, solicit, participate in or initiate discussions or negotiations
with, or provide any information to, any corporation, partnership, person or
other entity or group (other than Parent, any of its affiliates or
representatives) concerning any proposal or offer to acquire all or a
substantial part of the business and properties of the Company or any of its
subsidiaries or any capital stock of the Company or any of its subsidiaries,
whether by merger, tender offer, exchange offer, sale of assets or similar
transactions involving the Company or any subsidiary, division or operating
or principal business unit of the Company (an "Acquisition Proposal"), except
that the Company and the Company Board are not prohibited from (i) taking and
disclosing to the Company's stockholders a position with respect to a tender
or exchange offer by a third party pursuant to Rules 14d-9 and 14e-2
promulgated under the Exchange Act, or (ii) making such disclosure to the
Company's stockholders as, in the good faith judgment of the Board, after
receiving advice from outside counsel, is required under applicable law,
provided that the Company may not, except as described below, withdraw or
modify, or propose to withdraw or modify, its position with respect to the
Offer or the Merger or approve or recommend, or propose to approve or
recommend, any Acquisition Proposal, or enter into any agreement with respect
to any Acquisition Proposal. The Company also agreed to immediately cease any
existing activities, discussions or negotiations with any parties conducted
prior to the date of the Merger Agreement with respect to any of the
foregoing. The Merger Agreement provides that the Company may furnish
information concerning its business, properties or assets to any corporation,
partnership, person or other entity or group pursuant to appropriate
confidentiality agreements, and may negotiate and participate in discussions
and negotiations with such entity or group concerning an Acquisition Proposal
if (i) such entity or group has on an unsolicited basis submitted a bona fide
written proposal to the Company Board relating to any such transaction which
the Company Board determines in good faith represents a superior transaction
to the Offer and the Merger and which is not conditioned upon obtaining
additional financing and (ii) if, in the opinion of the Company Board, only
after receipt of advice from independent legal counsel, the failure to
provide such information or access or to engage in such discussions or
negotiations could reasonably be expected to cause the Company Board to
violate its fiduciary duties to the Company's stockholders under applicable
law (an Acquisition Proposal which satisfies clauses (i) and (ii) is referred
to in the Merger Agreement as a "Superior Proposal"). The Company will
immediately notify Parent of the existence of any proposal or inquiry, and
the identity of the party making such proposal or inquiry which it may
receive in respect of any such transaction.

                               17



    
<PAGE>

   Except as provided below, pursuant to the terms of the Merger Agreement,
neither the Company Board nor any committee thereof is permitted to (i)
withdraw or modify, or propose to withdraw or modify, in a manner adverse to
Parent or the Purchaser, the approval or recommendation by the Company Board
or any such committee of the Offer, the Merger Agreement or the Merger, (ii)
approve or recommend, or propose to approve or recommend, any Acquisition
Proposal or (iii) enter into any agreement with respect to any Acquisition
Proposal. Notwithstanding the foregoing, prior to the time of acceptance for
payment of Shares in the Offer, the Company Board may (subject to the terms
of this and the following sentence) withdraw or modify its approval or
recommendation of the Offer, the Merger Agreement or the Merger, approve or
recommend a Superior Proposal, or enter into an agreement with respect to a
Superior Proposal, in each case at any time after the second business day
following Parent's receipt of written notice advising Parent that the Company
Board has received a Superior Proposal, specifying the material terms and
conditions of such Superior Proposal and identifying the person making such
Superior Proposal; provided that the Company may not enter into an agreement
with respect to a Superior Proposal unless the Company furnishes Parent with
written notice not later than 12:00 noon one day in advance of any date that
it intends to enter into such agreement and has caused its financial and
legal advisors to negotiate with Parent to make such adjustments in the terms
and conditions of the Merger Agreement as would enable the Company to proceed
with the transactions contemplated herein on such adjusted terms. In
addition, if the Company proposes to enter into an agreement with respect to
any Acquisition Proposal, it will be required to concurrently with entering
into such agreement pay, or cause to be paid, to Parent the termination fee
described below under "Termination Fee."

   Indemnification and Insurance. Pursuant to the Merger Agreement, for seven
years after the Effective Time, Parent will, and will cause the Surviving
Corporation (or any successor to the Surviving Corporation) to, (i) retain
all provisions of the Company's Certificate of Incorporation as now in effect
respecting the limitation of liabilities of directors and officers and (ii)
indemnify, defend and hold harmless the present and former officers and
directors of the Company and its subsidiaries with respect to matters
occurring at or prior to the Effective Time to the full extent permitted
under Delaware law, subject to the Company's Certificate of Incorporation and
By-laws. The Merger Agreement also provides that Parent or the Surviving
Corporation will maintain the Company's existing officers' and directors'
liability insurance ("D&O Insurance") for a period of not less than seven
years after the Effective Time, provided that Parent may substitute therefor
policies of substantially similar coverage and amounts containing terms no
less favorable to such former directors or officers. Parent has also agreed
that if the existing D&O Insurance expires, is terminated or cancelled during
such period, Parent or the Surviving Corporation will use all reasonable
efforts to obtain substantially similar D&O Insurance, but in no event will
it be required to pay aggregate premiums for such insurance in excess of 150%
of the aggregate premiums paid in 1995 on an annualized basis for such
purpose (the "1995 Premium"). If Parent or the Surviving Corporation is
unable to obtain substantially similar D&O Insurance, Parent or the Surviving
Corporation has agreed to obtain as much insurance as can be obtained for an
annual premium not in excess of 150% of the 1995 Premium.

   Representations and Warranties. In the Merger Agreement, the Company has
made customary representations and warranties to Parent and the Purchaser
with respect to, among other things, its organization, capitalization,
financial statements, public filings, conduct of business, employee benefit
plans, intellectual property, employment matters, compliance with laws,
contracts, potential conflicts of interest, tax matters, litigation, title
and condition of properties, vote required to approve the Merger Agreement,
undisclosed liabilities, suppliers and customers, information in the Proxy
Statement and the absence of any material adverse changes in the Company
since December 31, 1995.

   Termination; Fees. The Merger Agreement may be terminated and the Merger
abandoned at any time prior to the Effective Time, whether before or after
approval of the stockholders of the Company, (a) by mutual consent of the
Board of Directors of Parent or the Purchaser and the Company Board, (b) by
either the Company Board or the Board of Directors of Parent or the Purchaser
(i) if (x) the Offer shall have expired without any Shares being purchased
therein or (y) the Purchaser shall not have accepted for payment any Shares
pursuant to the Offer by August 24, 1997, provided that such right to
terminate will not be available to any party whose failure to fulfill any
obligation under the Merger Agreement was the

                               18



    
<PAGE>

cause of, or resulted in, the failure of Parent or the Purchaser to purchase
the Shares on or before such date; or (ii) if any governmental entity shall
have issued an order, decree or ruling or taken any other action (which
order, decree, ruling or other action the parties will use their best efforts
to lift), in each case permanently restraining, enjoining or otherwise
prohibiting the acceptance for payment of, or payment for, Shares pursuant to
the Offer or the Merger and such order, decree, ruling or other action shall
have become final and non-appealable, (c) by the Company Board (i) if Parent,
the Purchaser or any of their affiliates shall have failed to commence the
Offer on or prior to five business days following the date of the initial
public announcement of the Offer; provided, that the Company may not
terminate the Merger Agreement pursuant to this clause (i) if the Company is
at such time in material breach of its obligations under the Merger
Agreement; (ii) in connection with entering into a definitive agreement with
respect to an Acquisition Proposal; provided it has complied with all of the
provisions, including the notice provisions described above under "No
Solicitation," and that it makes simultaneous payment of the Termination Fee
(as defined below); or (iii) if Parent or the Purchaser shall have breached
in any material respect any of their respective representations, warranties,
covenants or other agreements contained in the Merger Agreement, which breach
cannot be or has not been cured within 30 days after the giving of written
notice to Parent or the Purchaser, as applicable, (d) by the Board of
Directors of Parent or the Purchaser (i) if, due to an occurrence, not
involving a breach by Parent or the Purchaser of their obligations under the
Merger Agreement, which makes it impossible to satisfy any of the conditions
to the Offer, Parent, the Purchaser, or any of their affiliates shall have
failed to commence the Offer on or prior to five business days following the
date of the initial public announcement of the Offer; (ii) if prior to the
purchase of Shares pursuant to the Offer, the Company shall have breached any
representation, warranty, covenant or other agreement contained in the Merger
Agreement which (x) would give rise to the failure of a condition described
in paragraph (f) or (g) under Section 14 and (y) cannot be or has not been
cured within 30 days after the giving of written notice to the Company; or
(iii) if either Parent or the Purchaser is entitled to terminate the Offer as
a result of the occurrence of any event described in paragraph (e) under
Section 14.

   In accordance with the Merger Agreement, if (i) the Company Board
terminates the Merger Agreement pursuant to clause (c)(ii) of the immediately
preceding paragraph, (ii) the Board of Directors of Parent or the Purchaser
terminates the Merger Agreement pursuant to clause (d)(iii) of the
immediately preceding paragraph, or (iii) prior to the termination of the
Merger Agreement (other than by the Company Board pursuant to clauses (c)(i)
or (c)(iii) of the immediately preceding paragraph), an Acquisition Proposal
shall have been made and within one year of such termination, the Company
enters into an agreement with respect to, approves or recommends or takes any
action to facilitate an Acquisition Proposal with the person making such
original Acquisition Proposal at a price and on terms at least as favorable
to the stockholders of the Company as the Offer and the Merger and such later
Acquisition Proposal is consummated, the Company has agreed to pay to Parent
(concurrently with such termination, in the case of clauses (i) or (ii)
above, and not later than the consummation of such later Acquisition
Proposal, in the case of clause (iii) above) an amount equal to $4,000,000
(the "Termination Fee"); provided that no Termination Fee will be payable if
the Purchaser or Parent was in material breach of its representations,
warranties or obligations under the Merger Agreement at the time of its
termination.

   STOCKHOLDER AGREEMENTS. The following is a summary of the material terms
of the Stockholder Agreements. This summary is qualified in its entirety by
reference to the Stockholder Agreements which are incorporated herein by
reference and a copy of each of which has been filed with the Commission as
an exhibit to the Schedule 14D-1. The Stockholder Agreements may be examined
and a copy of each of them may be obtained at the place and in the manner set
forth in Section 8.

   Tender of Shares. In connection with the execution of the Merger
Agreement, Parent and the Purchaser entered into a separate Stockholder
Agreement with each of the Selling Stockholders. Upon the terms and subject
to the conditions of each of such agreements, each of the Selling
Stockholders has agreed to validly tender (and not withdraw) pursuant to and
in accordance with the terms of the Offer, not later than the fifth business
day after commencement of the Offer, the number of Shares owned beneficially
by such Selling Stockholder (or a total of 4,289,777 Shares, representing
approximately 47% of the outstanding Shares on a fully diluted basis).
The Selling Stockholders have also consented to the treatment of the Company
Options held by them as described under "The Merger Agreement--Options" above.

                               19



    
<PAGE>

   Stock Option. In order to induce Parent and the Purchaser to enter into
the Merger Agreement, each of the Selling Stockholders has granted to Parent
an irrevocable option (a "Stock Option") to purchase such Selling
Stockholder's Shares (the "Option Shares") at an amount (the "Purchase
Price") equal to the Offer Price. Pursuant to each of the Stockholder
Agreements, if (i) the Offer is terminated, abandoned or withdrawn by Parent
or the Purchaser (whether due to the failure of any of the conditions set
forth in Section 14 or otherwise), other than at a time when Parent or the
Purchaser is in material breach of the terms of the Merger Agreement, or (ii)
the Merger Agreement is terminated in accordance with its terms, other than
as a result of certain material breaches by Parent or the Purchaser in the
terms of the Merger Agreement, the Stock Options will, in any such case,
become exercisable, in whole but not in part, upon the first to occur of any
such event and remain exercisable in whole until the date which is 60 days
after the date of the occurrence of such event (the "60 Day Period"), so long
as: (i) all waiting periods under the HSR Act required for the purchase of
the Option Shares upon such exercise, shall have expired or been waived, (ii)
all other applicable consents of any governmental entity required for the
purchase or sale of the Option Shares upon such exercise shall have been
granted or otherwise satisfied, and (iii) there shall not be in effect any
preliminary or final injunction or other order issued by any court or
governmental entity prohibiting the exercise of the Stock Options pursuant to
the Stockholder Agreements. Each of the Stockholder Agreements provides that
if (i) all HSR Act waiting periods have not expired or been waived, (ii) all
other applicable consents of any governmental entity required for the
purchase or sale of the Option Shares shall not have been granted or
otherwise satisfied, or (iii) or there shall be in effect any such injunction
or order, in each case on the expiration of the 60 Day Period, the 60 Day
Period shall be extended until 5 business days after the later of (A) the
date of expiration or waiver of all HSR Act waiting periods, (B) the grant or
other satisfaction of such required consents, and (C) the date of removal or
lifting of such injunction or order; provided, however, that in no event will
the Stock Option be exercisable after the date which is six months after the
date on which the Stock Option first becomes exercisable; provided, further,
that the Stock Option will terminate if any governmental entity issues an
order, decree or ruling or takes any other action (which order, decree,
ruling or other action the parties to each of the Stockholder Agreements will
use their best efforts to lift), which permanently restrains, enjoins or
otherwise prohibits Parent's exercise of the Stock Option or the sale of the
Option Shares to Parent by the Selling Stockholders.

   Resale of the Option Shares. Each of the Stockholder Agreements provides
that if, within 12 months following the acquisition by the Purchaser of the
Option Shares, Parent or its affiliates sell, transfer or otherwise dispose
of any or all of the Option Shares to any third party (other than to another
affiliate of Parent) (a "Subsequent Sale") and realizes a Profit (as defined
below) from such Subsequent Sale, then Parent will pay to the Selling
Stockholder an amount equal to 95% of the Profit, promptly upon receipt of
the proceeds from such Subsequent Sale. "Profit" is defined in each of the
Stockholder Agreements to mean (A) the amount of the excess, if any, of (x)
the aggregate consideration received by Parent or its affiliates in
connection with a Subsequent Sale over (y) the product of (i) the number of
Shares sold, transferred or disposed of multiplied by (ii) the Purchase Price
less (B) any taxes or any other payment of any nature due or payable by
Parent with respect to the amount specified in clause (A), other than
Parent's or the Purchaser's expenses incurred in connection with the
negotiation, execution and delivery of the Stockholder Agreements and the
Merger Agreement. In the event the consideration received by Parent in a
Subsequent Sale is other than cash, each of the Stockholder Agreements
provides that the Selling Stockholder shall be entitled to the same form of
consideration as received by Parent in such Subsequent Sale or, at Parent's
election, an amount in cash equal to the fair market value of such other
consideration that the Selling Stockholder would have been entitled to.

   Provisions Concerning the Shares. The Selling Stockholders have agreed
that during the period commencing on the date of each of the Stockholder
Agreements and continuing until the first to occur of the Effective Time or
the termination of the Merger Agreement in accordance with its terms, at any
meeting of the Company's stockholders or in connection with any written
consent of the Company's stockholders, the Selling Stockholders will vote (or
cause to be voted) the Shares held of record or beneficially owned by each of
such Selling Stockholders: (i) in favor of the Merger, the execution and
delivery by the Company of the Merger Agreement and the approval of the terms
thereof and each of the other actions contemplated by the Merger Agreement
and each of the Stockholder Agreements and any

                               20



    
<PAGE>

actions required in furtherance thereof; and (ii) against any Acquisition
Proposal and against any action or agreement that would impede, frustrate,
prevent or nullify each of the Stockholder Agreements or result in a breach
in any respect of any covenant, representation or warranty or any other
obligation or agreement of the Company under the Merger Agreement or which
would result in any of the conditions to the Offer or to the Merger not being
fulfilled. In addition, each of the Selling Stockholders has appointed
representatives of Parent as proxies to vote such Selling Stockholder's
Shares or grant a consent or approval in respect of such Shares in favor of
the various transactions contemplated by the Merger Agreement and against any
Acquisition Proposal. Each of the Selling Stockholders also agreed not to
transfer such Selling Stockholder's Shares and not to, directly or
indirectly, encourage, solicit, participate in or initiate discussions or
negotiations with, or provide any information to, any corporation,
partnership, person or other entity or group (other than Parent, any of its
affiliates or representatives) concerning any Acquisition Proposal.

   Other Covenants, Representations, Warranties. In connection with each of
the Stockholder Agreements, each of the Selling Stockholders made certain
customary representations and warranties, including with respect to (i)
ownership of the Shares, (ii) the Selling Stockholder's authority to enter
into and perform its or his obligations under the Stockholder Agreement,
(iii) the absence of conflicts and requisite governmental consents and
approvals, and (iv) the absence of encumbrances on and in respect of the
Selling Stockholder's Shares. Parent and the Purchaser have made certain
representations and warranties with respect to Parent and the Purchaser's
authority to enter into the Stockholder Agreements and the absence of
conflicts and requisite governmental consents and approvals.

   In each of the Stockholder Agreements, Parent agreed that, in the event
that within three years following Parent's exercise of a Stock Option,
Parent, the Purchaser or any of their subsidiaries acquires any additional
Shares from, or pursuant to an offer made to all of the Company's
stockholders, whether by merger, consolidation, tender offer or other similar
transaction, the price paid per Share would be no less than the Purchase
Price.

   CONFIDENTIALITY AND NONDISCLOSURE AGREEMENT. Pursuant to the Confidentiality
and Nondisclosure Agreement entered into on October 21, 1996 by Parent and the
Company (the "Confidentiality Agreement"). The Company and Parent agreed to
provide, among other things, for the confidential treatment of their discussions
regarding the Offer and the Merger and the exchange of certain confidential
information concerning the Company.  The Confidentiality Agreement which is
incorporated herein by reference and a copy of which has been filed with the
Commission as an exhibit to the Schedule 14D-1. The Confidentiality Agreement
may be examined and copies may be obtained at the places and in the manner set
forth in Section 8 of this Offer to Purchase.

   OTHER MATTERS. Under Delaware law, the affirmative vote of holders of a
majority of the outstanding Shares entitled to vote, including any Shares
owned by the Purchaser, would be required to adopt the Merger. If the
Purchaser acquires, through the Offer or otherwise, voting power with respect
to at least a majority of the outstanding Shares, which would be the case if
the Minimum Condition were satisfied, it would have sufficient voting power
to effect the Merger without the vote of any other stockholder of the
Company. Delaware law also provides that if a parent company owns at least
90% of each class of stock of a subsidiary, the parent company can effect a
merger with the subsidiary without the authorization of the other
stockholders of the subsidiary. Accordingly, if, as a result of the Offer,
the Stockholder Agreements or otherwise, the Purchaser acquires at least 90%
of the outstanding Shares, the Purchaser could, and intends to, effect the
Merger without approval of any other stockholder of the Company.

   No appraisal rights are available in connection with the Offer. However,
if the Merger is consummated, stockholders of the Company may have certain
rights under Delaware law to dissent and demand appraisal of, and payment in
cash of the fair value of, their Shares. Such rights, if the statutory
procedures were complied with, could lead to a judicial determination of the
fair value (excluding any element of value arising from the accomplishment or
expectation of the Merger) required to be paid in

                               21



    
<PAGE>

cash to such dissenting holders for their Shares. Any such judicial
determination of the fair value of Shares could be based upon considerations
other than or in addition to the price paid in the Offer and the market value
of the Shares, including asset values and the investment value of the Shares.
The value so determined could be more or less than the purchase price per
Share pursuant to the Offer or the consideration per Share to be paid in the
Merger.

   In addition, several decisions by Delaware courts have held that, in
certain instances, a controlling stockholder of a corporation involved in a
merger has a fiduciary duty to the other stockholders that requires the
merger to be fair to such other stockholders. In determining whether a merger
is fair to minority stockholders, the Delaware courts have considered, among
other things, the type and amount of consideration to be received by the
stockholders and whether there were fair dealings among the parties. The
Delaware Supreme Court has indicated in recent decisions that in most cases
the remedy available in a merger that is found not to be "fair" to minority
stockholders is the right to appraisal described above or a damages remedy
based on essentially the same principles.

   Section 203 of the Delaware General Corporation Law (the "DGCL") prohibits
business combination transactions involving a Delaware corporation and an
"interested stockholder" (defined generally as any person that directly or
indirectly beneficially owns 15% or more of the outstanding voting stock of
the subject corporation) for three years following the date such person
became an "interested stockholder," unless certain exceptions apply,
including that prior to such date the Board of Directors of the company
approved either the business combination or the transaction which resulted in
such person being an interested stockholder. As set forth below, the Company
Board has taken actions to make Section 203 of the DGCL inapplicable to
Parent and the Purchaser in connection with the Offer, the Merger and the
transactions contemplated by the Stockholder Agreements.

   In the Merger Agreement, the Company represented that the Company Board
has duly and validly approved the transactions contemplated by the Merger
Agreement and the Stockholder Agreements, including the Offer, the Merger and
the acquisition of Shares pursuant to the foregoing, for purposes of Section
203 of the DGCL, such approval occurring prior to the time the Purchaser
became an "interested stockholder" as defined in Section 203 of the DGCL, so
that the provisions thereof are not applicable to such transactions.

   The Commission has adopted Rule 13e-3 under the Exchange Act which is
applicable to certain "going private" transactions and which may under
certain circumstances be applicable to the Merger or another business
combination following the purchase of Shares pursuant to the Offer in which
the Purchaser seeks to acquire the remaining Shares not held by it. The
Purchaser believes, however, that Rule 13e-3 will not be applicable to the
Merger because it is anticipated that the Merger will be effected within one
year following consummation of the Offer. Rule 13e-3 requires, among other
things, that certain financial information concerning the Company and certain
information relating to the fairness of the proposed transaction and the
consideration offered to minority stockholders in such transaction, be filed
with the Commission and disclosed to stockholders prior to consummation of
the transaction.

   The Purchaser or an affiliate of the Purchaser may, following the
consummation or termination of the Offer, seek to acquire additional Shares
through open market purchases, privately negotiated transactions, a tender
offer or exchange offer or otherwise, upon such terms and at such prices as
it shall determine, which may be more or less than the price to be paid
pursuant to the Offer. The Purchaser and its affiliates also reserve the
right to dispose of any or all Shares acquired by them.

   Upon the completion of the Offer, Parent intends to conduct a detailed
review of the Company and its assets, corporate structure, dividend policy,
capitalization, operations, properties, policies, management and personnel
and consider what, if any, changes would be desirable in light of the
circumstances which then exist. Such changes could include changes in the
Company's business, corporate structure, charter, by-laws, capitalization,
Board of Directors, management or dividend policy, although Parent has no
current plans with respect to any of such matters.

   Except as noted in this Offer to Purchase, neither Parent nor the
Purchaser has any present plans or proposals that would result in an
extraordinary corporate transaction, such as a merger, reorganization,
liquidation, relocation of operations, or sale or transfer of assets,
involving the Company or any of its subsidiaries, or any material changes in
the Company's corporate structure, business or composition of its management
or personnel.

                               22



    
<PAGE>

13. DIVIDENDS AND DISTRIBUTIONS

   As described above, the Merger Agreement provides that, prior to the
Effective Time, the Company will not, except as explicitly permitted by the
Merger Agreement, (i) declare, set aside or pay any dividend or other
distribution payable in cash, stock or property with respect to its capital
stock, (ii) issue, sell, pledge, dispose of or encumber any additional shares
of, or securities convertible into or exchangeable for, or options, warrants,
calls, commitments or rights of any kind to acquire, any shares of capital
stock of any class of the Company or its subsidiaries, other than Shares
reserved for issuance on November 24, 1996 pursuant to the exercise of
Company Options outstanding at November 24, 1996 or pursuant to the Stock
Purchase Plan, as permitted by the Merger Agreement, or (iii) redeem,
purchase or otherwise acquire directly or indirectly any of its capital stock
except pursuant to stock restriction agreements with employees existing as of
November 24, 1996.

14. CONDITIONS TO THE OFFER

   Notwithstanding any other provisions of the Offer, and in addition to (and
not in limitation of) the Purchaser's rights to extend and amend the Offer at
any time in its sole discretion (subject to the provisions of the Merger
Agreement), the Purchaser will not be required to accept for payment or,
subject to any applicable rules and regulations of the Commission, including
Rule 14e-1(c) under the Exchange Act (relating to the Purchaser's obligation
to pay for or return tendered Shares promptly after termination or withdrawal
of the Offer), pay for, and may delay the acceptance for payment of or,
subject to the restriction referred to above, the payment for, any tendered
Shares, and may terminate or amend the Offer as to any Shares not then paid
for, if (i) any applicable waiting period under the HSR Act has not expired
or terminated, (ii) the Minimum Condition has not been satisfied, (iii) the
approval of the Offer and the Merger by the Israeli Investments Center shall
not have been obtained, (iv) any applicable waiting period under the Israeli
Restrictive Trade Practices Act of 1988 has not expired or terminated, (v)
the approval of the Offer and the Merger by the Israeli Office of Chief
Scientist shall not have been obtained, (vi) the exemption by the Israeli
Securities Authority from the registration and prospectus delivery
requirements of the Israeli securities laws for the issuance of the Parent
Options shall not have been obtained, or (vii) at any time on or after the
date of the Merger Agreement and before the time of payment for any such
Shares, any of the following events shall occur or shall be determined by the
Purchaser to have occurred:

     (a) there shall be threatened or pending any suit, action or proceeding
    by any governmental entity against the Purchaser, Parent, the Company or
    any subsidiary of the Company (i) seeking to prohibit or impose any
    material limitations on Parent's or the Purchaser's ownership or operation
    (or that of any of their respective subsidiaries or affiliates) of all or
    a material portion of their or the Company's businesses or assets, or to
    compel Parent or the Purchaser or their respective subsidiaries and
    affiliates to dispose of or hold separate any material portion of the
    business or assets of the Company or Parent and their respective
    subsidiaries, in each case taken as a whole, (ii) challenging the
    acquisition by Parent or the Purchaser of any Shares under the Offer or
    pursuant to the Stockholder Agreements, seeking to restrain or prohibit
    the making or consummation of the Offer or the Merger or the performance
    of any of the other transactions contemplated by the Merger Agreement or
    of the Stockholder Agreements (including the voting provisions
    thereunder), or seeking to obtain from the Company, Parent or the
    Purchaser any damages that are material in relation to the Company and its
    subsidiaries taken as a whole, (iii) seeking to impose material
    limitations on the ability of the Purchaser, or render the Purchaser
    unable, to accept for payment, pay for or purchase some or all of the
    Shares pursuant to the Offer and the Merger, (iv) seeking to impose
    material limitations on the ability of the Purchaser or Parent effectively
    to exercise full rights of ownership of the Shares, including, without
    limitation, the right to vote the Shares purchased by it on all matters
    properly presented to the Company's stockholders, or (v) which otherwise
    is reasonably likely to have a material adverse affect on the consolidated
    financial condition, businesses or results of operations of the Company
    and its subsidiaries, taken as a whole;

     (b) there shall be any statute, rule, regulation, judgment, order or
    injunction enacted, entered, enforced, promulgated, or deemed applicable,
    pursuant to an authoritative interpretation by or on

                               23



    
<PAGE>

    behalf of a government entity, to the Offer or the Merger, or any other
    action shall be taken by any governmental entity, other than the
    application to the Offer or the Merger of applicable waiting periods under
    HSR Act, that is reasonably likely to result, directly or indirectly, in
    any of the consequences referred to in clauses (i) through (iv) of
    paragraph (a) above;

     (c) there shall have occurred (i) any general suspension of trading in,
    or limitation on prices for, securities on the New York Stock Exchange or
    in the Nasdaq National Market System, for a period in excess of 24 hours
    (excluding suspensions or limitations resulting solely from physical
    damage or interference with such exchanges not related to market
    conditions), (ii) a declaration of a banking moratorium or any suspension
    of payments in respect of banks in the United States (whether or not
    mandatory), (iii) a commencement of a war, armed hostilities or other
    international or national calamity directly or indirectly involving the
    United States or involving Israel and, in the case of armed hostilities
    involving Israel, having, or which could reasonably be expected to have, a
    substantial continuing general effect on business and financial conditions
    in Israel, (iv) any limitation (whether or not mandatory) by any United
    States or Israeli governmental authority on the extension of credit
    generally by banks or other financial institutions, or (v) a change in
    general financial bank or capital market conditions which materially and
    adversely affects the ability of financial institutions in the United
    States and in Israel to extend credit or syndicate loans or (vi) in the
    case of any of the foregoing existing at the time of the commencement of
    the Offer, a material acceleration or worsening thereof;

     (d) there shall have occurred any material adverse change (or any
    development that, insofar as reasonably can be foreseen, is reasonable
    likely to result in any material adverse change) in the consolidated
    financial condition, businesses, results of operations or prospects of the
    Company and its subsidiaries, taken as a whole, other than any such change
    which relates to general conditions in the economy or in the Company's
    industry or arises solely from the Company's execution and delivery of the
    Merger Agreement;

     (e) (i) the Company Board or any committee thereof shall have withdrawn
    or modified in a manner adverse to Parent or the Purchaser its approval or
    recommendation of the Offer, the Merger or the Merger Agreement, or
    approved or recommended any Acquisition Proposal or (ii) the Company shall
    have entered into any agreement with respect to any Superior Proposal in
    accordance with the terms of the Merger Agreement;

     (f) any of the representations and warranties of the Company set forth in
    the Merger Agreement that are qualified as to materiality shall not be
    true and correct and any such representations and warranties that are not
    so qualified shall not be true and correct in any material respect, in
    each case (i) as of the date referred to in any representation or warranty
    which addresses matters as of a particular date, or (ii) as to all other
    representations and warranties, as of the date of the Merger Agreement and
    as of the scheduled expiration of the Offer;

     (g) the Company shall have failed to perform in any material respect any
    material obligation or to comply in any material respect with any material
    agreement or covenant of the Company to be performed or complied with by
    it under the Merger Agreement; or

     (h) the Merger Agreement shall have been terminated in accordance with
    its terms;

which in the reasonable good faith judgment of Parent or the Purchaser, in
any such case, and regardless of the circumstances (including any action or
inaction by Parent or the Purchaser) giving rise to such condition makes it
inadvisable to proceed with the Offer and/or with such acceptance for payment
of or payment for Shares.

   The foregoing conditions are for the sole benefit of Parent and the
Purchaser and may be waived by Parent or the Purchaser, in whole or in part
at any time and from time to time in the sole discretion of Parent or the
Purchaser. The failure by Parent or the Purchaser at any time to exercise any
of the foregoing rights shall not be deemed a waiver of any such right and
each such right shall be deemed an ongoing right which may be asserted at any
time and from time to time.

                               24



    
<PAGE>

15. CERTAIN LEGAL MATTERS

   Except as described in this Section 15, based on a review of publicly
available filings by the Company with the Commission and other publicly
available information concerning the Company, the Purchaser is not aware of
any regulatory license or permit that appears to be material to the business
of the Company and its subsidiaries, taken as a whole, that might be
adversely affected by the acquisition of Shares by the Purchaser pursuant to
the Offer or, except as set forth below, of any approval or other action by
any governmental, administrative or regulatory agency or authority, domestic
or foreign, that would be required prior to the acquisition of Shares by the
Purchaser pursuant to the Offer. Should any such approval or other action be
required, the Purchaser currently contemplates that it will be sought. While
the Purchaser does not currently intend to delay the acceptance for payment
of Shares tendered pursuant to the Offer pending the outcome of any such
matter, there can be no assurance that any such approval or other action, if
needed, would be obtained or would be obtained without substantial conditions
or that adverse consequences might not result to the Company's business or
that certain parts of the Company's business might not have to be disposed of
in the event that such approvals were not obtained or any other actions were
not taken. The Purchaser's obligation under the Offer to accept for payment
and pay for Shares is subject to certain conditions, including conditions
relating to the legal matters discussed in this Section 15. See Section 14.

   State Takeover Statutes. A number of states have adopted "takeover"
statutes that purport to apply to attempts to acquire corporations that are
incorporated in such states, or whose business operations have substantial
economic effects in such states, or which have substantial assets, security
holders, employees, principal executive offices or principal places of
business in such states.

   The Company, directly or through subsidiaries, conducts business in a
number of states throughout the United States, some of which have enacted
"takeover" statutes. The Purchaser does not know whether any of these
statutes will, by their terms, apply to the Offer, and has not complied with
any such statutes. To the extent that certain provisions of these statutes
purport to apply to the Offer, the Purchaser believes that there are
reasonable bases for contesting such statutes. The Board of Directors of the
Company has approved the acquisition of Shares pursuant to the Offer for
purposes of Section 203 of the DGCL. See Section 12. If any person should
seek to apply any state takeover statute, the Purchaser would take such
action as then appears desirable, which action may include challenging the
validity or applicability of any such statute in appropriate court
proceedings. If it is asserted that one or more takeover statutes apply to
the Offer, and it is not determined by an appropriate court that such statute
or statutes do not apply or are invalid as applied to the Offer, the
Purchaser might be required to file certain information with, or receive
approvals from, the relevant state authorities, and the Purchaser might be
unable to purchase or pay for Shares tendered pursuant to the Offer, or be
delayed in continuing or consummating the Offer. In such case, the Purchaser
may not be obligated to accept for payment or pay for Shares tendered. See
Section 14.

   United States Antitrust. The Offer, the Merger and the acquisition of
Shares pursuant to the Stockholder Agreements are subject to the HSR Act,
which provides that certain acquisition transactions may not be consummated
unless certain information has been furnished to the Antitrust Division of
the Department of Justice (the "Antitrust Division") and the Federal Trade
Commission ("FTC") and certain waiting period requirements have been
satisfied. On November 26, 1996, Parent filed a Notification and Report Form
with respect to the Offer, the Merger and the purchase of Shares pursuant to
each of the Stockholder Agreements.

   Under the provisions of the HSR Act applicable to the Offer, the purchase
of Shares under the Offer may not be consummated until the expiration of a
15-calendar day waiting period following the filing by Parent. Accordingly,
as such filing was made on November 26, 1996, the waiting period with respect
to the Offer will expire at 11:59 p.m., New York City time, on December 11,
1996, unless Parent receives a request for additional information or
documentary material, or the Antitrust Division and the FTC terminate the
waiting period prior thereto. If, within such 15-day period, either the
Antitrust Division or the FTC requests additional information or material
from Parent concerning the Offer, the waiting period will be extended and
would expire at 11:59 p.m., New York City time, on the tenth calendar day
after the

                               25



    
<PAGE>

date of substantial compliance by Parent with such request. Only one
extension of the waiting period pursuant to a request for additional
information is authorized by the HSR Act. Thereafter, such waiting period may
be extended only by court order or with the consent of Parent. The Purchaser
will not accept for payment Shares tendered pursuant to the Offer unless and
until the waiting period requirements imposed by the HSR Act with respect to
the Offer have been satisfied. See Section 14.

   The provisions of the HSR Act would similarly apply to any purchase of the
Shares subject to the Stockholder Agreements pursuant to the Stockholder
Agreements (other than purchases effected through a tender pursuant to the
Offer or purchases pursuant to the Stockholder Agreements occurring after the
expiration of the 15-day waiting period connected to the Offer). If, as is
expected, the purchase of Shares permitted by the Stockholder Agreements is
effected through a tender of such Shares pursuant to the Offer or pursuant to
the Stockholder Agreements after the expiration of the 15-day waiting period
connected to the Offer, the HSR requirements applicable to the Offer
described in the prior paragraph would apply.

   The Merger would not require an additional filing under the HSR Act if the
Purchaser owns 50% or more of the outstanding Shares at the time of the
Merger or if the Merger occurs within one year after the HSR Act waiting
period applicable to the Offer expires or is terminated.

   The FTC and the Antitrust Division frequently scrutinize the legality
under the antitrust laws of transactions such as the Purchaser's acquisition
of Shares pursuant to the Offer, the Merger and each of the Stockholder
Agreements. At any time before or after the Purchaser's acquisition of
Shares, the Antitrust Division or the FTC could take such action under the
antitrust laws as it deems necessary or desirable in the public interest,
including seeking to enjoin the acquisition of Shares pursuant to the Offer
or otherwise or seeking divestiture of Shares acquired by the Purchaser or
divestiture of substantial assets of Parent or its subsidiaries. Private
parties and state attorneys general may also bring legal action under the
antitrust laws under certain circumstances. Based upon an examination of
publicly available information relating to the businesses in which Parent and
the Company are engaged, Parent and the Purchaser believe that the
acquisition of Shares by the Purchaser will not violate the antitrust laws.
Nevertheless, there can be no assurance that a challenge to the Offer or
other acquisition of Shares by the Purchaser on antitrust grounds will not be
made or, if such a challenge is made, of the result. See Section 14 for
certain conditions to the Offer, including conditions with respect to
litigation and certain governmental actions.

   German Antitrust. The Merger is subject to German antitrust law, which
requires the pre-closing approval of any merger or acquisition, where (i) one
party has consolidated worldwide net sales in its most recent financial year
exceeding DM 2 billion or each of at least two parties to such a transaction
has consolidated worldwide net sales exceeding DM 1 billion, and (ii) such
transaction has effects in Germany. Accordingly, a pre-closing notification
must be filed with the German Federal Cartel Office in connection with the
Merger. The German Federal Cartel Office has an initial one-month review
period in which it may either (i) approve the Merger, or (ii) initiate an
investigation to examine the consequences of the Merger, which investigation
cannot last more than a total of four months from the date of the original
notification. On November 25, 1996, Parent filed a notification with the
German Federal Cartel Office in connection with the Merger. Accordingly, the
initial one-month review period will expire on December 27, 1996, unless the
German Federal Cartel Office commences an investigation of the Merger or
approves the Merger prior thereto.

   Israeli Restrictive Trade Practices. Concurrently with entering into the
Merger Agreement and the Stockholder Agreements, Parent entered into an
agreement to acquire all of the outstanding capital stock of Orbot
Instruments, which develops, manufactures, markets and services automated
optical inspection systems for use in the production of integrated circuits
by the semiconductor industry. Under Israeli antitrust law, the acquisition
of both the Company and Orbot Instruments by the same acquiror may be deemed
to be a merger which requires that a filing be made with the Israeli
Comptroller of Restrictive Trade Practices (the "Comptroller") and the
expiration of a 30-day waiting period. The Comptroller may either render a
"no-action" letter within such 30-day period, fail to take any action (in
which case upon the expiration of the 30-day period the transaction will be
deemed to have been approved) or (upon

                               26



    
<PAGE>

approval by the Restrictive Trade Practices Court) extend the waiting period
and investigate the transaction.

   On November 26, 1996, Parent filed with the Comptroller an
application (i) requesting confirmation that Parent's acquisition of the
Company and Parent's acquisition of Orbot Instruments is not a "Merger"
(as such term is defined in Section 17 of the Restrictive Trade Practices
Law, 1988), or, alternatively, (ii) requesting that the Comptroller approve
such transactions, if such an approval is required. Accordingly, the 30-day
waiting period is expected to expire on December 26, 1996, unless the
Comptroller receives the requisite approval to extend the waiting period
and investigate the transaction or the Comptroller terminates the waiting
period prior thereto.

   Israeli Chief Scientist Office.  Parent's acquisition of control over the
Company may require the approval of the Office of the Chief Scientist at the
Ministry of Industry and Trade of the State of Israel (the "OCS").

   Under the Law for the Encouragement of Industrial Research and
Development, 1984 (the "Research Law"), and the regulations promulgated
thereunder, research and development programs approved by the OCS are
eligible to receive grants, if they meet certain criteria, in exchange for
the payment of royalties from the sale of the products developed in the
course of the OCS-funded research and development programs. Significant
portions of the Company's research and development activities are funded
through OCS grants received by the Company's Israeli subsidiary, Opal
Technologies Ltd. ("Opal Technologies"). The terms of the OCS grants awarded
to Opal Technologies include the obligation to obtain the approval of the OCS
prior to any change of control over Opal Technologies.

   The OCS will generally condition its consent on the receipt of the
following:

     (i) an undertaking by the new owner to abide by the provisions of the
    Research Law, the regulations promulgated thereunder, and the terms of the
    relevant grants, including a commitment not to transfer the know-how
    developed in the course of the OCS-funded research and development
    programs to any other entity without the approval of the OCS, and an
    undertaking to pay all royalties as and when due; and

     (ii) a commitment that the manufacture of the products developed under
    the OCS-funded research and development programs will take place in Israel
    and that manufacturing rights will not be transferred to any third party
    without the prior consent of the OCS.

   On November 26, 1996, Parent and the Company filed with the OCS an
application to obtain the approval of the OCS, to the extent that such
approval is required, to Parent's acquisition of control over the Company.

   Israeli Investment Center. The Law for the Encouragement of Capital
Investments, 1959 (the "Investment Law") provides that a capital investment
in eligible facilities may, upon application to the Investment Center of the
Ministry of Industry and Trade of the State of Israel (the "Investment
Center"), be designated as an "Approved Enterprise." Each certificate of
approval for an Approved Enterprise relates to a specific investment program
delineated both by its financial scope, including its capital sources, and by
its physical characteristics, e.g., the equipment to be purchased and
utilized pursuant to the program.

   The benefits and obligations which apply to the Approved Enterprise are
set out in the regulations promulgated under the Investment Law and the
specific approval issued by the Investment Center with regard to each
Approved Enterprise. The benefits include government grants, government
guaranteed loans, tax holidays and combinations thereof. Opal Technologies
has four Approved Enterprises, all of which enjoy tax holiday benefits and
one of which also enjoyed government guaranteed loans. The Investment
Center's approval may be required prior to Parent's acquisition of control
over the Company.

   On November 26, 1996, Parent and the Company filed with the Investment
Center an application to obtain approval of the Investment Center, to the extent
that such approval is required, to Parent's acquisition of control over the
Company.

   Israeli Securities Authority. Under Israeli securities laws, a person may
not offer securities to the public other than pursuant to a prospectus whose
publication has been authorized by the Israeli Securities Authority (the
"ISA"). Pursuant to ISA policy, an offer of securities in Israel to more than 35
offerees is deemed to be an offer to the public. However, the ISA has the
authority to exempt offers to more than 35 offerees from the prospectus
publication requirement under certain circumstances.

   As described in Section 12, the Merger Agreement provides that, in the
Merger, the Company's Unvested Options will be assumed by Parent and
converted into Parent Options to purchase shares of

                               27



    
<PAGE>

Parent Common Stock. Due to the fact that the Company has approximately 115
holders of Unvested Options in Israel, the conversion of Unvested Options into
Parent Options in the Merger may be deemed to be an offer of securities to the
public subject to the Israeli prospectus publication requirement. The Merger
Agreement provides that the issuance of Parent Options to holders of Unvested
Options is conditioned upon the issuance of an exemption by the ISA from the
prospectus publication requirement under Israeli securities laws. In the event
such exemption is not obtained, the Merger Agreement provides that the Unvested
Options held by the 35 largest holders of Unvested Options will be converted
into Parent Options, as provided above, and that the Unvested Options held by
the remaining holders will be cancelled in exchange for cash payments in the
same manner as Vested Options. See Section 12.

   On November 26, 1996, Parent filed an application with the ISA for an
exemption from the prospectus publication requirement under Israeli securities
laws in connection with the treatment of Unvested Options in the Merger.

   Israeli Tax Authorities. Grants of Company Options to employees of the
Company who are residents of Israel are governed by the provisions of Section
102 of the Israeli Income Tax Ordinance (the "Section 102 Company Options")
which requires, among other things, that a trustee designated by the Company
(the "Trustee") hold the Section 102 Company Options or the Shares issued
upon exercise of such Section 102 Company Options (the "Section 102 Shares")
for a cumulative minimum period of two years (the "Minimum Holding Period")
prior to any disposition of the Section 102 Company Options or the Section
102 Shares. As of the date of the Merger Agreement, all of the Section 102
Company Options had been held by the Trustee for less than the Minimum Holding
Period and no Section 102 Shares had been issued.

   On November 26, 1996, Parent and Opal Technologies requested the Israeli
Tax Authorities to (i) qualify the Parent Options issuable in exchange for
the unvested Section 102 Company Options pursuant to the terms of the Merger
Agreement under Section 102 or another similar provision of the Israeli Income
Tax Ordinance, and to approve such exchange of options as a non-taxable event,
(ii) approve Parent's and Opal Technologies' request that the Minimum Holding
Period with respect to such Parent Options will include the period during
which the unvested Section 102 Company Options were held by the Trustee prior
to the Effective Time, (iii) approve the cancellation in exchange for cash
payments of the vested Section 102 Company Options pursuant to the terms of
the Merger Agreement, and conclude that such cancellation and cash payments
do not violate the terms of the plan pursuant to which such vested Section
102 Company Options were granted, and (iv) approve that,following the
completion of the transaction, Opal Technologies and its employees will be
entitled to all of the rights and benefits under Section 102 that they were
entitled to prior to the completion of the transaction.


16. FEES AND EXPENSES

   The Purchaser has retained Morgan Stanley & Co. Incorporated to act as the
Dealer Manager and to provide certain financial advisory services, Georgeson
& Company Inc. to act as the Information Agent and Harris Trust Company of
New York to act as the Depositary in connection with the Offer. The Dealer
Manager and the Information Agent may contact holders of Shares by mail,
telephone, telex, telegraph and personal interview and may request brokers,
dealers, commercial banks, trust companies and other nominees to forward the
Offer material to beneficial owners. The Dealer Manager, the Information
Agent and the Depositary each will receive reasonable and customary
compensation for their services, will be reimbursed for certain reasonable
out-of-pocket expenses and will be indemnified against certain liabilities
and expenses in connection therewith, including certain liabilities under the
federal securities laws. None of the Dealer Manager, the Information Agent or
the Depositary has been retained to make solicitations or recommendations in
connection with the Offer. Neither Parent nor the Purchaser will pay any fees
or commissions to any broker or dealer or other person (other than the Dealer
Manager and the Information Agent) for soliciting tenders of Shares pursuant
to the Offer. Brokers, dealers, commercial banks and trust companies will be
reimbursed by the Purchaser for reasonable expenses incurred by them in
forwarding material to their customers.

17. MISCELLANEOUS

   The Purchaser is not aware of any jurisdiction in which the making of the
Offer is not in compliance with applicable law. If the Purchaser becomes
aware of any jurisdiction in which the making of the Offer would not be in
compliance with applicable law, the Purchaser will make a good faith effort
to comply

                               28



    
<PAGE>

with any such law. If, after such good faith effort, the Purchaser cannot
comply with any such law, the Offer will not be made to (nor will tenders be
accepted from or on behalf of) the holders of Shares residing in such
jurisdiction. In those jurisdictions whose securities or blue sky laws
require the Offer to be made by a licensed broker or dealer, the Offer is
being made on behalf of the Purchaser by the Dealer Manager or one or more
registered brokers or dealers which are licensed under the laws of such
jurisdiction.

   NO PERSON HAS BEEN AUTHORIZED TO GIVE ANY INFORMATION OR MAKE ANY
REPRESENTATION ON BEHALF OF THE PURCHASER OR PARENT NOT CONTAINED IN THIS
OFFER TO PURCHASE OR IN THE LETTER OF TRANSMITTAL AND, IF GIVEN OR MADE, SUCH
INFORMATION OR REPRESENTATION MUST NOT BE RELIED UPON AS HAVING BEEN
AUTHORIZED.

   The Purchaser has filed with the Commission the Schedule 14D-1 pursuant to
Rule 14d-3 under the Exchange Act, furnishing certain additional information
with respect to the Offer, and may file amendments thereto. The Schedule
14D-1 and any amendments thereto, including exhibits, may be inspected and
copies may be obtained at the same places and in the same manner as set forth
in Section 8 (except that they will not be available at the regional offices
of the Commission).

                                          ORION CORP. I
November 26, 1996

                               29



    
<PAGE>

                                                                    SCHEDULE I

                           DIRECTORS AND EXECUTIVE
                    OFFICERS OF PARENT AND THE PURCHASER,

   1. DIRECTORS AND EXECUTIVE OFFICERS OF PARENT. The following table sets
forth the name and present principal occupation or employment, and material
occupations, positions, offices or employments for the past five years of
each director and executive officer of Parent. Each such person is a citizen
of the United States of America, and, except as otherwise noted, the business
address of each such person is c/o Parent, 3050 Bowers Avenue, Santa Clara,
California 95054.

<TABLE>
<CAPTION>
                                                     PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT;
NAME AND BUSINESS ADDRESS                        MATERIAL POSITIONS HELD DURING THE PAST FIVE YEARS

- --------------------------------------  --------------------------------------------------------------------

<S>                                     <C>
James C. Morgan (57)  ................. Director of Parent since 1977 and Chairman of the Board of Directors
                                        of Parent since 1987 and Chief Executive Officer of Parent since
                                        February 1977. Mr. Morgan also served as President of Parent from
                                        1976 to 1987.

Dan Maydan (60)  ...................... Director of Parent since 1992 and President of Parent since December
                                        1993 and a Chairman of Applied Komatsu Technology, Inc. (formerly
                                        Applied Display Technology, Inc.) since December 1991. From 1990 to
                                        December 1993, he was Executive Vice President of Parent. During
                                        1989 and 1990, Mr. Maydan was a Group Vice President of Parent. Dr.
                                        Maydan has been a director of the Company since November 1995.

Michael H. Armacost* (58)  ............ Director of Parent since 1993. Mr. Armacost is President of The
The Brookings Institution               Brookings Institution, a nonpartisan public policy research
1775 Massachusetts Ave., N.W.           organization, since October 1995. From September 1993 through
Washington, DC 20036-2188               September 1995, he was a Distinguished Senior Fellow and Visiting
                                        Professor at the Asia/Pacific Research Center, Stanford University.
                                        From 1989 to 1993, he was the U.S. Ambassador to Japan. Mr. Armacost
                                        is a director of TRW, Inc. and AFLAC Incorporated.

Herbert M. Dwight, Jr.** (65) ........  Director of the Parent since 1981. Mr. Dwight is President, Chairman
Optical Coating Laboratory, Inc.        and Chief Executive Officer of Optical Coating Laboratory, Inc., a
2789 Northpoint Parkway                 manufacturer of optical thin films and components, since August
Department 101-1                        1991. From 1988 through 1991, Mr. Dwight was President and Chief
Santa Rosa, CA 95407-7397               Executive Officer of Superconductor Technologies, Inc., a high
                                        temperature superconductor research and development company. Mr.
                                        Dwight is a director of Applied Magnetics Corporation and Trans
                                        Ocean Ltd.


George B. Farnsworth ** (72) .........  Director of the Parent since 1974. Mr. Farnsworth retired in January 19
                                        From September 1981 through January 1986, he was Senior Vice President 86.
                                        and Group Executive, Aerospace Business Group, of General Electric Co.

</TABLE>

- ------------

*  Member of Audit Committee

** Member of Stock Option and Compensation Committee

                               S-1



    
<PAGE>

<TABLE>
<CAPTION>
                                             PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT;
NAME AND BUSINESS ADDRESS                 MATERIAL POSITIONS HELD DURING THE PAST FIVE YEARS
- -----------------------------  ----------------------------------------------------------------------
<S>                            <C>
Philip V. Gerdine* (56)  ..... Director of the Parent since 1976. Mr. Gerdine is Executive Director
Siemens AG                     (Overseas Acquisitions) of Siemens AG, Munich, Germany, a manufacturer
ZFG-4                          of electrical and electronic products, since October 1990.
Wittelsbachersplatz, 2
D-8000 Munich 2, Germany

Tsuyoshi Kawanishi (66) .....  Director of the Parent since 1994. Mr. Kawanishi is Senior Adviser to
Toshiba Corporation            Toshiba Corporation, a manufacturer of electrical and electronic
1-1-1 Shibaura                 products, since June 1994. From June 1990 to June 1994, he was Senior
Minato-Ku                      Executive Vice President and a member of the Board of Directors of
Tokyo 105, Japan               Toshiba Corporation.

Paul R. Low* (62)............  Director of the Parent since 1992. Mr. Low is Chief Executive Officer
P.R.L. Associates              of P.R.L. Associates, a consulting firm, since July 1992. From July
11 Birchwood Drive             1990 to July 1992, Dr. Low was a Vice President, and General Manager
Greenwich, CT 06831            of Technical Products, of International Business Machines Corporation.
                               Dr. Low is a director of Network Computing Devices, Inc., Number Nine
                               Visual Technology Corporation, Solectron Corporation and Veeco
                               Instruments Inc.

Alfred J. Stein** (63).......  Director of the Parent since 1981. Mr. Stein is Chairman and Chief
VLSI Technology, Inc.          Executive Officer of VLSI Technology, Inc., a manufacturer of
1109 McKay Drive               semiconductor devices, since March 1982. Mr. Stein is a director of
San Jose, CA 95131             Tandy Corporation.

Sasson Somekh (49)...........  Senior Vice President of Parent since December 1993. Dr. Somekh served
                               as Group Vice President from 1990 to 1993. Prior to that, Dr. Somekh
                               had been a divisional Vice President. Dr. Somekh joined Applied
                               Materials in 1980 as a Project Manager.

Gerald F. Taylor (55) ........ Chief Financial Officer of Parent since 1984. Mr. Taylor has also been
                               a Senior Vice President of the Company since 1991 and was previously
                               Vice President of Finance from 1984 to 1991.
David N.K. Wang (49) ......... Senior Vice President of Parent since December 1993. Dr. Wang served
                               as Group Vice President from 1990 to 1993. Prior to that, Dr. Wang had
                               been a divisional Vice President. Dr. Wang joined Applied Materials in
                               1980 as a Manager, Process Engineering and Applications.
Keisuke Yawata (61) .......... President and Chief Executive Officer of Applied Materials Japan,
                               effective January 1, 1995. From 1995 through 1994, Mr. Yawata was a
                               Vice President, and from 1993 through 1994, he was Executive Advisor
                               to the Chairman, of LSI Logic Corp. From 1985 through 1992, Mr. Yawata
                               was President, and from 1992 through 1993, he was Chairman, of LSI
                               Logic K.K.
</TABLE>

                               S-2



    
<PAGE>

   2. DIRECTORS AND EXECUTIVE OFFICERS OF THE PURCHASER. The following table
sets forth the name and present principal occupation or employment, and
material occupations, positions, offices or employments for the past five
years of each director and executive officer of the Purchaser. Each such
person is a citizen of the United States of America and the business address
of each such person is c/o Parent, 3050 Bowers Avenue, Santa Clara,
California 95054.

<TABLE>
<CAPTION>
                                         PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT;
NAME                                  MATERIAL POSITIONS HELD DURING THE PAST FIVE YEARS

- --------------------------  --------------------------------------------------------------------

<S>                         <C>
Nancy H. Handel (45)  ..... President and Chief Executive Officer of the Purchaser; Vice
                            President Corporate Finance and Treasurer of Parent since January
                            1995. During 1994, Ms. Handel served as Managing Director Corporate
                            Finance of Parent. Prior to that, Ms. Handel served as Treasurer of
                            Parent from 1986 to 1994. Ms. Handel joined Parent in March 1985.

Dennis A. Hunter (54)  .... Director of the Purchaser since November 1996; Managing Director
                            Corporate Development of Parent. Mr. Hunter has been head of
                            Business Development since 1986. Prior to that, he served as
                            director of Finance and Administration for worldwide marketing and
                            product development. Mr. Hunter has also served as Corporate
                            Controller. Mr. Hunter currently serves as a member of the
                            Shareholders Committee of Applied Komatsu Technologies, Inc.

Joseph J. Sweeney (48)  ... Vice President and Secretary of the Purchaser; Vice President of
                            Parent since December 1993. Previously, Mr. Sweeney was a Managing
                            Director of Parent. From 1992 to 1993, Mr. Sweeney was a Vice
                            President of Silicon Graphics, Inc., and from 1988 to 1992 Mr.
                            Sweeney was a Vice President of MIPS Computer Systems, Inc.
</TABLE>

                               S-3



    
<PAGE>

   Facsimile copies of the Letter of Transmittal, properly completed and duly
executed, will be accepted. The Letter of Transmittal, certificates for
Shares and any other required documents should be sent or delivered by each
stockholder of the Company or his broker, dealer, commercial bank or other
nominee to the Depositary at one of its addresses set forth below.

                       The Depositary for the Offer is:

                       HARRIS TRUST COMPANY OF NEW YORK
                            By Overnight Courier:
                          77 Water Street, 4th Floor
                           New York, New York 10005

                                   By Mail:
                             Wall Street Station
                                P.O. Box 1010
                        New York, New York 10268-1010

                          By Facsimile Transmission
                      (for Eligible Institutions only):
                             Fax: (212) 701-7636
                                  (212) 701-7637
                            Confirm by telephone:
                                (212) 701-7618

                                   By Hand:
                                Receive Window
                          77 Water Street, 5th Floor
                              New York, New York

   Any questions or requests for assistance may be directed to the Dealer
Manager or the Information Agent at their respective telephone numbers and
locations listed below. Additional copies of this Offer to Purchase, the
Letter of Transmittal and the Notice of Guaranteed Delivery may be obtained
from the Information Agent at its address and telephone numbers set forth
below. You may also contact your broker, dealer, commercial bank or trust
company or nominee for assistance concerning the Offer.

                   The Information Agent for the Offer is:

                           GEORGESON & COMPANY INC.

                              Wall Street Plaza
                           New York, New York 10005
                Banks and Brokers Call Collect: (212) 440-9800
                   All Others Call Toll Free: 800-223-2064

                     The Dealer Manager for the Offer is:

                             MORGAN STANLEY & CO.
                                 INCORPORATED

                            555 California Street
                                  Suite 2200
                       San Francisco, California 94104
                                (415) 576-2331




<PAGE>

                            LETTER OF TRANSMITTAL

                       TO TENDER SHARES OF COMMON STOCK
                                      OF
                                  OPAL, INC.
          Pursuant to the Offer to Purchase Dated November 26, 1996
                                      by
                                Orion Corp. I
                         a wholly owned subsidiary of
                           Applied Materials, Inc.

        THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT,
              NEW YORK CITY TIME, ON TUESDAY, DECEMBER 24, 1996,
                         UNLESS THE OFFER IS EXTENDED

                       The Depositary for the Offer is:

                       HARRIS TRUST COMPANY OF NEW YORK
                            By Overnight Courier:
                          77 Water Street, 4th Floor
                           New York, New York 10005

                                   By Mail:
                             Wall Street Station
                                P.O. Box 1010
                        New York, New York 10268-1010

                          By Facsimile Transmission
                      (for Eligible Institutions only):
                             Fax: (212) 701-7636
                                  (212) 701-7637
                            Confirm by telephone:
                                (212) 701-7618

                                   By Hand:
                                Receive Window
                          77 Water Street, 5th Floor
                              New York, New York

   DELIVERY OF THIS LETTER OF TRANSMITTAL TO AN ADDRESS OTHER THAN AS SET
FORTH ABOVE OR TRANSMISSION OF INSTRUCTIONS VIA FACSIMILE TRANSMISSION OTHER
THAN AS SET FORTH ABOVE WILL NOT CONSTITUTE A VALID DELIVERY.

   THE INSTRUCTIONS ACCOMPANYING THIS LETTER OF TRANSMITTAL SHOULD BE READ
CAREFULLY BEFORE THIS LETTER OF TRANSMITTAL IS COMPLETED.

   This Letter of Transmittal is to be completed by stockholders either if
certificates evidencing Shares (as defined below) are to be forwarded
herewith or if delivery of Shares is to be made by book-entry transfer to the
Depositary's account at The Depository Trust Company ("DTC") or the
Philadelphia Depository Trust Company ("PDTC") (each a "Book-Entry Transfer
Facility" and collectively, the "Book-Entry Transfer Facilities") pursuant to
the book-entry transfer procedure described in Section 3 of the Offer to
Purchase (as defined below). Delivery of documents to a Book-Entry Transfer
Facility does not constitute delivery to the Depositary.

   Stockholders whose certificates evidencing Shares ("Stock Certificates")
are not immediately available or who cannot deliver their Stock Certificates
and all other documents required hereby to the Depositary prior to the
Expiration Date (as defined in Section l of the Offer to Purchase) or who
cannot complete the procedure for delivery by book-entry transfer on a timely
basis and who wish to tender their Shares must do so pursuant to the
guaranteed delivery procedure described in Section 3 of the Offer to
Purchase. See Instruction 2.

                                1



    
<PAGE>

[ ]   CHECK HERE IF SHARES ARE BEING DELIVERED BY BOOK-ENTRY TRANSFER TO THE
      DEPOSITARY'S ACCOUNT AT ONE OF THE BOOK-ENTRY TRANSFER FACILITIES AND
      COMPLETE THE FOLLOWING:

Name(s) of Tendering Institution:
- -----------------------------------------------------------------------------

Check Box of Applicable Book-Entry Transfer Facility:
(CHECK ONE)    [ ] DTC         [ ] PDTC

Account Number                                  Transaction Code Number
- -----------------------------------------------------------------------------

[ ]  CHECK HERE IF SHARES ARE BEING TENDERED PURSUANT TO A NOTICE OF GUARANTEED
     DELIVERY PREVIOUSLY SENT TO THE DEPOSITARY AND COMPLETE THE FOLLOWING:

Name(s) of Registered Holder(s):
- -----------------------------------------------------------------------------

Window Ticket No. (if any):
- -----------------------------------------------------------------------------

Date of Execution of Notice of Guaranteed Delivery:
- -----------------------------------------------------------------------------

Name of Institution which Guaranteed Delivery:
- -----------------------------------------------------------------------------

If Delivered by Book-Entry Transfer, Check Box of Book-Entry Transfer
Facility:
(CHECK ONE)    [ ] DTC         [ ] PDTC

Account Number                                  Transaction Code Number
- -----------------------------------------------------------------------------

<TABLE>
<CAPTION>
                                       DESCRIPTION OF SHARES TENDERED
- ----------------------------------------------------------------------------------------------------------
<S>                                                <C>                 <C>                  <C>
  NAME(S) AND ADDRESS(S) OF REGISTERED HOLDER(S)
   (PLEASE FILL IN, IF BLANK, EXACTLY AS NAME(S)          STOCK CERTIFICATE(S) AND SHARE(S) TENDERED
         APPEAR(S) ON STOCK CERTIFICATE(S)                  (ATTACH ADDITIONAL LIST, IF NECESSARY)
- -------------------------------------------------  -------------------------------------------------------
                                                       STOCK           TOTAL NUMBER OF SHARES  NUMBER OF
                                                   CERTIFICATE(S)        EVIDENCED BY STOCK      SHARES
                                                     NUMBER(S)*            CERTIFICATE(S)*      TENDERED**
                                                   ------------------  -------------------  --------------

                                                   ------------------  -------------------  --------------

                                                   ------------------  -------------------  --------------

                                                   ------------------  -------------------  --------------

                                                   ------------------  -------------------  --------------

                                                   ------------------  -------------------  --------------

- -------------------------------------------------  ------------------  -------------------  --------------
                                                   TOTAL SHARES
- -------------------------------------------------  -------------------------------------------------------
 * Need not be completed by stockholders delivering Shares by book-entry transfer.
** Unless otherwise indicated, it will be assumed that all Shares evidenced by each Stock Certificate delivered
   to the Depositary are being tendered hereby. See Instruction 4.
- ----------------------------------------------------------------------------------------------------------
</TABLE>

                  NOTE:  SIGNATURES MUST BE PROVIDED BELOW.
                PLEASE READ THE INSTRUCTIONS SET FORTH IN THIS
                       LETTER OF TRANSMITTAL CAREFULLY.

                                2



    
<PAGE>

Ladies and Gentlemen:

   The undersigned hereby tenders to Orion Corp. I, a Delaware corporation
(the "Purchaser") and a wholly owned subsidiary of Applied Materials, Inc., a
Delaware corporation, the above-described shares of common stock, par value
$.01 per share (the "Shares"), of Opal, Inc., a Delaware corporation (the
"Company"), pursuant to the Purchaser's offer to purchase all outstanding
Shares, at $18.50 per Share, net to the seller in cash, upon the terms and
subject to the conditions set forth in the Offer to Purchase, dated November
26, 1996 (the "Offer to Purchase"), receipt of which is hereby acknowledged,
and in this Letter of Transmittal (which, as amended or supplemented from
time to time, together constitute the "Offer"). The undersigned understands
that the Purchaser reserves the right to transfer or assign, in whole or from
time to time in part, to one or more of its affiliates, the right to purchase
all or any portion of the Shares tendered pursuant to the Offer.

   Subject to, and effective upon, acceptance for payment of the Shares
tendered herewith, in accordance with the terms of the Offer (including, if
the Offer is extended or amended, the terms and conditions of such extension
or amendment), the undersigned hereby sells, assigns and transfers to, or
upon the order of, the Purchaser all right, title and interest in and to all
the Shares that are being tendered hereby and all dividends, distributions
(including, without limitation, distributions of additional Shares) and
rights declared, paid or distributed in respect of such Shares on or after
November 24, 1996, (collectively, "Distributions"), and irrevocably appoints
the Depositary the true and lawful agent and attorney-in-fact of the
undersigned with respect to such Shares and all Distributions, with full
power of substitution (such power of attorney being deemed to be an
irrevocable power coupled with an interest), to (i) deliver Stock
Certificates evidencing such Shares and all Distributions, or transfer
ownership of such Shares and all Distributions on the account books
maintained by a Book-Entry Transfer Facility, together, in either case, with
all accompanying evidences of transfer and authenticity, to or upon the order
of the Purchaser, (ii) present such Shares and all Distributions for transfer
on the books of the Company and (iii) receive all benefits and otherwise
exercise all rights of beneficial ownership of such Shares and all
Distributions, all in accordance with the terms of the Offer.

   The undersigned hereby irrevocably appoints Nancy H. Handel and Joseph J.
Sweeney, and each of them, as the attorneys and proxies of the undersigned,
each with full power of substitution, to vote in such manner as each such
attorney and proxy or his substitute shall, in his sole discretion, deem
proper and otherwise act (by written consent or otherwise) with respect to
all the Shares tendered hereby which have been accepted for payment by the
Purchaser prior to the time of such vote or other action and all Shares and
other securities issued in Distributions in respect of such Shares, which the
undersigned is entitled to vote at any meeting of stockholders of the Company
(whether annual or special and whether or not an adjourned or postponed
meeting) or consent in lieu of any such meeting or otherwise. This proxy and
power of attorney is coupled with an interest in the Shares tendered hereby,
is irrevocable and is granted in consideration of, and is effective upon, the
acceptance for payment of such Shares by the Purchaser in accordance with the
terms of the Offer. Such acceptance for payment shall revoke all other
proxies and powers of attorney granted by the undersigned at any time with
respect to such Shares (and all Shares and other securities issued in
Distributions in respect of such Shares), and no subsequent proxy or power of
attorney shall be given or written consent executed (and if given or
executed, shall not be effective) by the undersigned with respect thereto.
The undersigned understands that, in order for Shares to be deemed validly
tendered, immediately upon the Purchaser's acceptance of such Shares for
payment, the Purchaser must be able to exercise full voting and other rights
with respect to such Shares, including, without limitation, voting at any
meeting of the Company's stockholders then scheduled.

   The undersigned hereby represents and warrants that the undersigned has
full power and authority to tender, sell, assign and transfer the Shares
tendered hereby and all Distributions, and that when such Shares are accepted
for payment by the Purchaser, the Purchaser will acquire good, marketable and
unencumbered title thereto and to all Distributions, free and clear of all
liens, restrictions, charges and encumbrances, and that none of such Shares
and Distributions will be subject to any adverse claim. The undersigned, upon
request, shall execute and deliver all additional documents deemed by the
Depositary or the Purchaser to be necessary or desirable to complete the
sale, assignment and transfer of the Shares tendered hereby and all
Distributions. In addition, the undersigned shall remit and transfer promptly
to the Depositary for the account of the Purchaser all Distributions in
respect of the Shares tendered hereby, accompanied by appropriate
documentation of transfer, and, pending such remittance and transfer or
appropriate assurance thereof, the Purchaser shall be entitled to all rights
and privileges as owner of each such Distribution and may withhold the entire
purchase price of the Shares tendered hereby or deduct from such purchase
price the amount or value of such Distribution as determined by the Purchaser
in its sole discretion.

   No authority herein conferred or agreed to be conferred shall be affected
by, and all such authority shall survive, the death or incapacity of the
undersigned. All obligations of the undersigned hereunder shall be binding
upon the heirs, personal representatives, successors and assigns of the
undersigned. Except as stated in the Offer to Purchase, this tender is
irrevocable.

   The undersigned understands that tenders of Shares pursuant to any one of
the procedures described in Section 3 of the Offer to Purchase and in the
instructions hereto will constitute the undersigned's acceptance of the terms


    
and conditions of the Offer. The Purchaser's acceptance of such Shares for
payment will constitute a binding agreement between the undersigned and the
Purchaser upon the terms and subject to the conditions of the Offer.

   Unless otherwise indicated herein in the box entitled "Special Payment
Instructions," please issue the check for the purchase price of all Shares
purchased, and return all Stock Certificates evidencing Shares not purchased
or not tendered, in the name(s) of the registered holder(s) appearing above
under "Description of Shares Tendered." Similarly, unless otherwise indicated
in the box entitled "Special Delivery Instructions," please mail the check
for the purchase price of all Shares purchased and all Stock Certificates
evidencing Shares not tendered or not purchased (and accompanying documents,
as appropriate) to the address(es) of the registered holder(s) appearing
above under "Description of Shares Tendered." In the event that the boxes
entitled "Special Payment Instructions" and "Special Delivery Instructions"
are both completed, please issue the check for the purchase price of all
Shares purchased and return all Stock Certificates evidencing Shares not
purchased or not tendered in the name(s) of, and mail such check and Stock
Certificates to, the person(s) so

                                3



    
<PAGE>

indicated. Unless otherwise indicated herein in the box entitled "Special
Payment Instructions," please credit any Shares tendered hereby and delivered
by book-entry transfer, but which are not purchased, by crediting the account
at the Book-Entry Transfer Facility designated above. The undersigned
recognizes that the Purchaser has no obligation, pursuant to the Special
Payment Instructions, to transfer any Shares from the name of the registered
holder(s) thereof if the Purchaser does not purchase any of the Shares
tendered hereby.


                  SPECIAL PAYMENT INSTRUCTIONS
                (SEE INSTRUCTIONS 1, 5, 6 AND 7)

To be completed ONLY if the check for the purchase price of
Shares purchased or Stock Certificates evidencing Shares not
tendered or not purchased are to be issued in the name of
someone other than the undersigned, or if Shares tendered
hereby and delivered by book-entry transfer which are not
purchased are to be returned by credit to an account at one of
the Book-Entry Transfer Facilities other than that designated
above.

Issue [ ] check   [ ] Stock Certificate(s) to:

Name:
- -------------------------------------------------------------------------------

                            (Print)

Address:
- -------------------------------------------------------------------------------


- -------------------------------------------------------------------------------
                       (Include Zip Code)

- -------------------------------------------------------------------------------
       TAXPAYER IDENTIFICATION OR SOCIAL SECURITY NUMBER
           (SEE SUBSTITUTE FORM W-9 ON REVERSE SIDE)

[ ] Credit Shares delivered by book-entry
    transfer and not purchased to the account
    set forth below:

Check appropriate box:
[ ] DTC    [ ] PDTC
Account Number
- -------------------------------------------------------------------------------


                SPECIAL PAYMENT INSTRUCTIONS
               (SEE INSTRUCTIONS 1, 5, 6 AND 7)

To be completed ONLY if the check for the purchase price of
Shares purchased or Stock Certificates evidencing Shares
not tendered or not purchased are to be mailed to someone
other than the undersigned, or to the undersigned at an
address other than that shown under "Description of Shares
Tendered."

Mail [ ] check   [ ] Stock Certificate(s) to:

Name:
- -------------------------------------------------------------------------------
                           (Print)

Address:
- -------------------------------------------------------------------------------

- -------------------------------------------------------------------------------
                     (Include Zip Code)


                                4



    
<PAGE>

- -----------------------------------------------------------------------------

                                  IMPORTANT
                           STOCKHOLDERS: SIGN HERE
               (Please Complete Substitute Form W-9 on Reverse)
- -----------------------------------------------------------------------------
                          Signature(s) of Holder(s)
Dated:          ,199

(Must be signed by registered holder(s) exactly as name(s) appear(s) on Stock
Certificates or on a security position listing or by a person(s) authorized
to become registered holder(s) by certificates and documents transmitted
herewith. If signature is by a trustee, executor, administrator, guardian,
attorney-in-fact, officer of a corporation or other person acting in a
fiduciary or representative capacity, please provide the following
information. See Instruction 5.)

Name(s):
- -----------------------------------------------------------------------------
                                (Please Print)
Capacity (full title):
- -----------------------------------------------------------------------------
- -----------------------------------------------------------------------------
Address:
- -----------------------------------------------------------------------------
- -----------------------------------------------------------------------------
                                                            (include Zip Code)
Area Code and Telephone No.:
- -----------------------------------------------------------------------------
Taxpayer Identification or Social Security No.:
- -----------------------------------------------------------------------------

                  (See Substitute Form W-9 on reverse side)

                          GUARANTEE OF SIGNATURE(S)
                   (If Required--See Instructions 1 and 5)

FOR USE BY FINANCIAL INSTITUTIONS ONLY. PLACE MEDALLION GUARANTEE IN SPACE
BELOW.

Authorized Signature:
- -----------------------------------------------------------------------------

Name:
- -----------------------------------------------------------------------------
                                (Please Print)

Name of Firm:
- -----------------------------------------------------------------------------

Address:
- -----------------------------------------------------------------------------

- -----------------------------------------------------------------------------
                              (include Zip Code)

Area Code and Telephone No.:
- -------------------------------------------------------------------------------

Dated:                  , 19
- -----------------------------------------------------------------------------

                                5



    
<PAGE>

                                 INSTRUCTIONS
            FORMING PART OF THE TERMS AND CONDITIONS OF THE OFFER

   1. Guarantee of Signatures. Except as otherwise provided below, all
signatures on this Letter of Transmittal must be guaranteed by a financial
institution (including most banks, savings and loans associations and
brokerage houses) that is a participant in the Security Transfer Agents
Medallion Program (each an "Eligible Institution"). No signature guarantee is
required on this Letter of Transmittal (a) if this Letter of Transmittal is
signed by the registered holder(s) (which term, for purposes of this
document, shall include any participant in a Book-Entry Transfer Facility
whose name appears on a security position listing as the owner of Shares) of
Shares tendered herewith, unless such holder(s) has completed either the box
entitled "Special Delivery Instructions" or the box entitled "Special Payment
Instructions" on the reverse hereof, or (b) if such Shares are tendered for
the account of an Eligible Institution. See Instruction 5.

   2. Delivery of Letter of Transmittal and Stock Certificates. This Letter
of Transmittal is to be used either if Stock Certificates are to be forwarded
herewith or if Shares are to be delivered by book-entry transfer pursuant to
the procedure set forth in Section 3 of the Offer to Purchase. Stock
Certificates evidencing all physically tendered Shares, or a confirmation of
a book-entry transfer into the Depositary's account at a Book-Entry Transfer
Facility of all Shares delivered by book-entry transfer as well as a properly
completed and duly executed Letter of Transmittal (or facsimile thereof) with
any required signature guarantees (or, in the case of a book-entry transfer,
an Agent's Message, as defined below) and any other documents required by
this Letter of Transmittal, must be received by the Depositary at one of its
addresses set forth on the reverse hereof prior to the Expiration Date (as
defined in Section l of the Offer to Purchase). If Stock Certificates are
forwarded to the Depositary in multiple deliveries, a properly completed and
duly executed Letter of Transmittal must accompany each such delivery.
Stockholders whose Stock Certificates are not immediately available, who
cannot deliver their Stock Certificates and all other required documents to
the Depositary prior to the Expiration Date or who cannot complete the
procedure for delivery by book-entry transfer on a timely basis may tender
their Shares pursuant to the guaranteed delivery procedure described in
Section 3 of the Offer to Purchase. Pursuant to such procedure: (i) such
tender must be made by or through an Eligible Institution; (ii) a properly
completed and duly executed Notice of Guaranteed Delivery, substantially in
the form made available by the Purchaser, must be received by the Depositary
prior to the Expiration Date; and (iii) the Stock Certificates evidencing all
physically delivered Shares in proper form for transfer by delivery, or a
confirmation of a book-entry transfer into the Depositary's account at a
Book-Entry Transfer Facility of all Shares delivered by book-entry transfer,
in each case together with a Letter of Transmittal (or a facsimile thereof),
properly completed and duly executed, with any required signature guarantees
(or, in the case of a book-entry transfer, an Agent's Massage), and any other
documents required by this Letter of Transmittal, must be received by the
Depositary within three Nasdaq National Market System trading days after the
date of execution of such Notice of Guaranteed Delivery, all as described in
Section 3 of the Offer to Purchase. The term "Agent's Message" means a
message, transmitted by a Book-Entry Transfer Facility to, and received by
the Depositary and forming a part of the Book-Entry Confirmation, which
states that such Book-Entry Transfer Facility has received an express
acknowledgment from the participant in such Book-Entry Transfer Facility
tendering the Shares that such participant has received and agrees to be
bound by the terms of this Letter of Transmittal and that the Purchaser may
enforce such agreement against the participant.

   THE METHOD OF DELIVERY OF THIS LETTER OF TRANSMITTAL, STOCK CERTIFICATES
AND ALL OTHER REQUIRED DOCUMENTS, INCLUDING DELIVERY THROUGH ANY BOOK-ENTRY
TRANSFER FACILITY, IS AT THE OPTION AND RISK OF THE TENDERING STOCKHOLDER,
AND THE DELIVERY WILL BE DEEMED MADE ONLY WHEN ACTUALLY RECEIVED BY THE
DEPOSITARY. IF DELIVERY IS BY MAIL, REGISTERED MAIL WITH RETURN RECEIPT
REQUESTED, PROPERLY INSURED, IS RECOMMENDED. IN ALL CASES, SUFFICIENT TIME
SHOULD BE ALLOWED TO ENSURE TIMELY DELIVERY.

   No alternative, conditional or contingent tenders will be accepted and no
fractional Shares will be purchased. By execution of this Letter of
Transmittal (or a facsimile hereof), all tendering stockholders waive any
right to receive any notice of the acceptance of their Shares for payment.

   3. Inadequate Space. If the space provided herein under "Description of
Shares Tendered" is inadequate, the Stock Certificate numbers, the number of
Shares evidenced by such Stock Certificates and the number of Shares tendered
should be listed on a separate schedule and attached hereto.




    

   4. Partial Tenders (not applicable to shareholders who tender by
book-entry transfer). If fewer than all the Shares evidenced by any Stock
Certificate delivered to the Depositary herewith are to be tendered hereby,
fill in the number of Shares which are to be tendered in the box entitled
"Number of Shares Tendered." In such cases, new Stock Certificate(s)
evidencing the remainder of the Shares that were evidenced by the Stock
Certificates delivered to the Depositary herewith will be sent to the
person(s) signing this Letter of Transmittal, unless otherwise provided in
the box entitled "Special Delivery Instructions" on the reverse hereof, as
soon as practicable after the expiration or termination of the Offer. All
Shares evidenced by Stock Certificates delivered to the Depositary will be
deemed to have been tendered unless otherwise indicated.

   5.  Signatures on Letter of Transmittal; Stock Powers and Endorsements. If
this Letter of Transmittal is signed by the registered holder(s) of the
Shares tendered hereby, the signature(s) must correspond with the name(s) as
written on the face of the Stock Certificates evidencing such Shares without
alteration, enlargement or any other change whatsoever.

                                6



    
<PAGE>

   If any Share tendered hereby is owned of record by two or more persons,
all such persons must sign this Letter of Transmittal.

   If any of the Shares tendered hereby are registered in the names of
different holders, it will be necessary to complete, sign and submit as many
separate Letters of Transmittal as there are different registrations of such
Shares.

   If this Letter of Transmittal is signed by the registered holder(s) of the
Shares tendered hereby, no endorsements of Stock Certificates or separate
stock powers are required, unless payment is to be made to, or Stock
Certificates evidencing Shares not tendered or not purchased are to be issued
in the name of, a person other than the registered holder(s), in which case
the Stock Certificate(s) evidencing the Shares tendered hereby must be
endorsed or accompanied by appropriate stock powers, in either case signed
exactly as the name(s) of the registered holder(s) appear(s) on such Stock
Certificate(s). Signatures on such Stock Certificate(s) and stock powers must
be guaranteed by an Eligible Institution.

   If this Letter of Transmittal is signed by a person other than the
registered holder(s) of the Shares tendered hereby, the Stock Certificate(s)
evidencing the Shares tendered hereby must be endorsed or accompanied by
appropriate stock powers, in either case signed exactly as the name(s) of the
registered holder(s) appear(s) on such Stock Certificate(s). Signatures on
such Stock Certificate(s) and stock powers must be guaranteed by an Eligible
Institution.

   If this Letter of Transmittal or any Stock Certificate or stock power is
signed by a trustee, executor, administrator, guardian, attorney-in-fact,
officer of a corporation or other person acting in a fiduciary or
representative capacity, such person should so indicate when signing, and
proper evidence satisfactory to the Purchaser of such person's authority so
to act must be submitted.

   6. Stock Transfer Taxes. Except as otherwise provided in this Instruction
6, the Purchaser will pay all stock transfer taxes with respect to the sale
and transfer of any Shares to it or its order pursuant to the Offer. If,
however, payment of the purchase price of any Shares purchased is to be made
to, or Stock Certificate(s) evidencing Shares not tendered or not purchased
are to be issued in the name of, a person other than the registered
holder(s), the amount of any stock transfer taxes (whether imposed on the
registered holder(s), such other person or otherwise) payable on account of
the transfer to such other person will be deducted from the purchase price of
such Shares purchased, unless evidence satisfactory to the Purchaser of the
payment of such taxes, or exemption therefrom, is submitted. Except as
provided in this Instruction 6, it will not be necessary for transfer tax
stamps to be affixed to the Stock Certificates evidencing the Shares tendered
hereby.

   7. Special Payment and Delivery Instructions. If a check for the purchase
price of any Shares tendered hereby is to be issued, or Stock Certificate(s)
evidencing Shares not tendered or not purchased are to be issued, in the name
of a person other than the person(s) signing this Letter of Transmittal or if
such check or any such Stock Certificate is to be sent to someone other than
the person(s) signing this Letter of Transmittal or to the person(s) signing
this Letter of Transmittal but at an address other than that shown in the box
entitled "Description of Shares Tendered" on the reverse hereof, the
appropriate boxes on the reverse of this Letter of Transmittal must be
completed. Stockholders delivering Shares tendered hereby by book-entry
transfer may request that Shares not purchased be credited to such account
maintained at a Book-Entry Transfer Facility as such stockholder may
designate in the box entitled "Special Payment Instructions" on the reverse
hereof. If no such instructions are given, all such Shares not purchased will
be returned by crediting the account at the Book-Entry Transfer Facility
designated on the reverse hereof as the account from which such Shares were
delivered.

   8. Questions and Requests for Assistance or Additional Copies. Questions
and requests for assistance may be directed to the Dealer Manager or the
Information Agent at their respective addresses or telephone numbers set
forth below. Additional copies of the Offer to Purchase, this Letter of
Transmittal and the Notice of Guaranteed Delivery may be obtained from the
Dealer Manager or the Information Agent or from brokers, dealers, commercial
banks or trust companies.




    

   9. Substitute Form W-9. Each tendering stockholder is required to provide
the Depositary with a correct Taxpayer Identification Number ("TIN") on the
Substitute Form W-9 which is provided under "Important Tax Information"
below, and to certify, under penalties of perjury, that such number is
correct and that such stockholder is not subject to backup withholding of
federal income tax. If a tendering stockholder has been notified by the
Internal Revenue Service that such stockholder is subject to backup
withholding, such stockholder must cross out item (2) of the Certification
box of the Substitute Form W-9, unless such stockholder has since been
notified by the Internal Revenue Service that such stockholder is no longer
subject to backup withholding. Failure to provide the information on the
Substitute Form W-9 may subject the tendering stockholder to 31% federal
income tax withholding on the payment of the purchase price of all Shares
purchased from such stockholder. If the tendering stockholder has not been
issued a TIN and has applied for one or intends to apply for one in the near
future, such stockholder should write "Applied For" in the space provided for
the TIN in Part I of the Substitute Form W-9, sign and date the Substitute
Form W-9 and complete the Certificate of Awaiting Taxpayer Identification
Number below. If "Applied For" is written in Part I and the Depositary is not
provided with a TIN within 60 days, the Depositary will withhold 31% on all
payments of the purchase price to such stockholder until a TIN is provided to
the Depositary.

   10. Lost, Destroyed or Stolen Certificates. If any certificate(s)
representing Shares has been lost, destroyed or stolen, the tendering
stockholder should promptly notify the Depositary. The tendering stockholder
will then be instructed as to the steps that must be taken in order to
replace the certificate(s). This Letter of Transmittal and related documents
cannot be processed until the procedures for replacing lost or destroyed
certificates have been followed.

                                7



    
<PAGE>

   IMPORTANT: THIS LETTER OF TRANSMITTAL (OR FACSIMILE HEREOF), PROPERLY
COMPLETED AND DULY EXECUTED (TOGETHER WITH ANY REQUIRED SIGNATURE GUARANTEES
AND STOCK CERTIFICATES OR CONFIRMATION OF BOOK-ENTRY TRANSFER AND ALL OTHER
REQUIRED DOCUMENTS) OR A PROPERLY COMPLETED AND DULY EXECUTED NOTICE OF
GUARANTEED DELIVERY MUST BE RECEIVED BY THE DEPOSITARY PRIOR TO THE
EXPIRATION DATE (AS DEFINED IN THE OFFER TO PURCHASE).

                          IMPORTANT TAX INFORMATION

   Under the federal income tax law, a stockholder whose tendered Shares are
accepted for payment is required by law to provide the Depositary (as payer)
with such stockholder's correct TIN on Substitute Form W-9 below. If such
stockholder is an individual, the TIN is such stockholder's social security
number. If the Depositary is not provided with the correct TIN, the
stockholder may be subject to a $50 penalty imposed by the Internal Revenue
Service. In addition, payments that are made to such stockholder with respect
to Shares purchased pursuant to the Offer may be subject to backup
withholding of 31%.

   Certain stockholders (including, among others, all corporations and
certain foreign individuals) are not subject to these backup withholding and
reporting requirements. In order for a foreign individual to qualify as an
exempt recipient, such individual must submit a statement, signed under
penalties of perjury, attesting to such individual's exempt status. Forms of
such statements can be obtained from the Depositary. See the enclosed
Guidelines for Certification of Taxpayer Identification Number on Substitute
Form W-9 for additional instructions.

   If backup withholding applies, the Depositary is required to withhold 31%
of any payments made to the stockholder. Backup withholding is not an
additional tax. Rather, the tax liability of persons subject to backup
withholding will be reduced by the amount of tax withheld. If withholding
results in an overpayment of taxes, a refund may be obtained from the
Internal Revenue Service.

PURPOSE OF SUBSTITUTE FORM W-9

   To prevent backup withholding on payments that are made to a stockholder
with respect to Shares purchased pursuant to the Offer, the stockholder is
required to notify the Depositary of such stockholder's correct TIN by
completing the form below certifying (a) that the TIN provided on Substitute
Form W-9 is correct (or that such stockholder is awaiting a TIN), and (b)
that (i) such stockholder has not been notified by the Internal Revenue
Service that such stockholder is subject to backup withholding as a result of
a failure to report all interest or dividends or (ii) the Internal Revenue
Service has notified such stockholder that such stockholder is no longer
subject to backup withholding.

WHAT NUMBER TO GIVE THE DEPOSITARY

   The stockholder is required to give the Depositary the social security
number or employer identification number of the record holder of the Shares
tendered hereby. If the Shares are in more than one name or are not in the
name of the actual owner, consult the enclosed Guidelines for Certification
of Taxpayer Identification Number on Substitute Form W-9 for additional
guidance on which number to report. If the tendering stockholder has not been
issued a TIN and has applied for a number or intends to apply for a number in
the near future, the stockholder should write "Applied For" in the space
provided for the TIN in Part I, sign and date the Substitute Form W-9 and
complete the Certificate of Awaiting Taxpayer Identification Number below. If
"Applied For" is written in Part I and the Depositary is not provided with a
TIN within 60 days, the Depositary will withhold 31% of all payments of the
purchase price to such stockholder until a TIN is provided to the Depositary.

                                8



    
<PAGE>

                PAYER'S NAME: HARRIS TRUST COMPANY OF NEW YORK

<TABLE>
<CAPTION>
<S>                              <C>                                                          <C>
           SUBSTITUTE            PART I--Taxpayer Identification Number--                        Social Security Number
            FORM W-9             For all accounts, enter taxpayer identification number in    OR
   DEPARTMENT OF THE TREASURY    the box at right. (For most individuals, this is your          Employer Identification
    INTERNAL REVENUE SERVICE     social security number. If you do not have a number, see                Number
                                 Obtaining a Number in the enclosed Guidelines.) Certify by      (If awaiting TIN write
                                 signing and dating below. Note: If the account is in more           "Applied For")
                                 than one name, see the chart in the enclosed Guidelines to
                                 determine which number to give the payer
- ------------------------------   ----------------------------------------------------------   ---------------------------
 Payer's Request for Taxpayer                                  PART II--For Payees Exempt From Backup Withholding, see
 Identification Number (TIN)                                   the enclosed Guidelines and complete as instructed
                                                               therein.
- -------------------------------------------------------------  ----------------------------------------------------------
    CERTIFICATION--Under Penalties of perjury, I certify that:
    (1) The number shown on this form is my correct Taxpayer Identification Number (or a Taxpayer Identification
        Number has not been issued to me and either (a) I have mailed or delivered an application to receive a
        Taxpayer Identification Number to the appropriate Internal Revenue Service ("IRS") or Social Security
        Administration Office or (b) I intend to mail or deliver an application in the near future. I understand that
        if I do not provide a Taxpayer Identification Number within sixty (60) days, 31% of all reportable payments
        made to me thereafter will be withheld until I provide a number), and
    (2) I am not subject to backup withholding either because (a) I am exempt from backup withholding, (b) I have not
        been notified by the IRS that I am subject to backup withholding as a result of failure to report all
        interest or dividends, or (c) the IRS has notified me that I am no longer subject to backup withholding.
    CERTIFICATE INSTRUCTIONS--You must cross out item (2) above if you have been notified by the IRS that you are
    subject to backup withholding because of underreporting interest or dividends on your tax return. However, if
    after being notified by the IRS that you were subject to backup withholding you received another notification
    from the IRS that you are no longer subject to backup withholding, do not cross out item (2). (Also see
    instructions in the enclosed Guidelines.)

    -----------------------------------------------------------------------------------------------------------------
    SIGNATURE
                                                                                               DATE              , 199
    -----------------------------------------------------------------------------------------------------------------
</TABLE>

NOTE:  FAILURE TO COMPLETE AND RETURN THIS FORM MAY RESULT IN BACKUP
       WITHHOLDING OF 31% OF ANY PAYMENTS MADE TO YOU PURSUANT TO THE OFFER.
       PLEASE REVIEW THE ENCLOSED GUIDELINES FOR CERTIFICATION OF TAXPAYER
       IDENTIFICATION NUMBER ON SUBSTITUTE FORM W-9 FOR ADDITIONAL DETAILS.

            CERTIFICATE OF AWAITING TAXPAYER IDENTIFICATION NUMBER
I certify under penalties of perjury that a taxpayer identification number
has not been issued to me, and either (1) I have mailed or delivered an
application to receive a taxpayer identification number to the appropriate
Internal Revenue Service Center or Social Security Administration Office or
(2) I intend to mail or deliver an application in the near future. I
understand that if I do not provide a taxpayer identification number by the
time of payment, 31% of all reportable payments made to me will be withheld,
but that such amounts will be refunded to me if I then provide a Taxpayer
Identification Number within sixty (60) days.

Signature                                                  Date
- -------------------------------------------------------------------------------

   Any questions or requests for assistance may be directed to the Dealer
Manager or the Information Agent at their respective telephone numbers and
locations listed below. Additional copies of this Offer to Purchase, the
Letter of Transmittal and the Notice of Guaranteed Delivery may be obtained
from the Information Agent at its address and telephone numbers set forth
below. You may also contact your broker, dealer, commercial bank or trust
company or nominee for assistance concerning the Offer.

                                9



    
<PAGE>

                   The Information Agent for the Offer is:

                           GEORGESON & COMPANY INC.

                              Wall Street Plaza
                              New York, NY 10005
                Banks and Brokers Call Collect: (212) 440-9800
                  All Others Call Toll Free: (800) 223-2064

                     The Dealer Manager for the Offer is:

                             MORGAN STANLEY & CO.
                                 INCORPORATED

                            555 California Street,
                                  Suite 2200
                       San Francisco, California 94104
                                (415) 576-2331

                               10



PAGE>

                        NOTICE OF GUARANTEED DELIVERY
                                     FOR
                       TENDER OF SHARES OF COMMON STOCK
                                      OF
                                  OPAL, INC.
                  (NOT TO BE USED FOR SIGNATURE GUARANTEES)

   This Notice of Guaranteed Delivery, or one substantially in the form
hereof, must be used to accept the Offer (as defined below) (i) if
certificates ("Stock Certificates") evidencing shares of common stock, par
value $.01 per share (the "Shares"), of Opal, Inc., a Delaware corporation
(the "Company"), are not immediately available, (ii) if Stock Certificates
and all other required documents cannot be delivered to Harris Trust Company
of New York, as Depositary (the "Depositary"), prior to the Expiration Date
(as defined in Section 1 of the Offer to Purchase (as defined below)) or
(iii) if the procedure for delivery by book-entry transfer cannot be
completed on a timely basis. This Notice of Guaranteed Delivery may be
delivered by hand or mail or transmitted by telegram or facsimile
transmission to the Depositary. See Section 3 of the Offer to Purchase.

                       The Depositary for the Offer is:
                       HARRIS TRUST COMPANY OF NEW YORK
                            By Overnight Courier:
                          77 Water Street, 4th Floor
                           New York, New York 10005

                                   By Mail:
                             Wall Street Station
                                P.O. Box 1010
                        New York, New York 10268-1010

                          By Facsimile Transmission
                      (for Eligible Institutions only):
                             Fax: (212) 701-7636
                                  (212) 701-7637
                            Confirm by telephone:
                                (212) 701-7618

                                   By Hand:
                                Receive Window
                          77 Water Street, 5th Floor
                              New York, New York

   DELIVERY OF THIS NOTICE OF GUARANTEED DELIVERY TO AN ADDRESS OTHER THAN AS
SET FORTH ABOVE, OR TRANSMISSION OF INSTRUCTIONS VIA FACSIMILE TRANSMISSION
OTHER THAN AS SET FORTH ABOVE, WILL NOT CONSTITUTE A VALID DELIVERY.

   This form is not to be used to guarantee signatures. If a signature on a
Letter of Transmittal is required to be guaranteed by an "Eligible
Institution" under the instructions thereto, such signature guarantee must
appear in the applicable space provided in the signature box on the Letter of
Transmittal.




    
<PAGE>

Ladies and Gentlemen:

   The undersigned hereby tenders to Orion Corp. I, a Delaware corporation
and a wholly owned subsidiary of Applied Materials, Inc., a Delaware
corporation, upon the terms and subject to the conditions set forth in the
Offer to Purchase, dated November 26, 1996 (the "Offer to Purchase"), and the
related Letter of Transmittal (which, as amended or supplemented from time to
time, together constitute the "Offer"), receipt of each of which is hereby
acknowledged, the number of Shares specified below pursuant to the guaranteed
delivery procedures described in Section 3 of the Offer to Purchase.

Number of Shares:                                 Name(s) of Record Holder(s):
- ---------------------------------------------     -----------------------------

Certificate Nos. (if available)
- ---------------------------------------------     -----------------------------
                                                          (Please Print)

Check ONE box if Shares will be tendered by
book-entry transfer:                                       Address(es):
                                                  -----------------------------
[] The Depository Trust Company
                                                  -----------------------------

                                                  -----------------------------
                                                            (Zip Code)

[] Philadelphia Depository Trust Company

Account Number:                                       Area Code and Tel. No:
- ---------------------------------------------     -----------------------------

Dated:                                                    Signature(s):
- ---------------------------------------------     -----------------------------

                                                  -----------------------------


                                  GUARANTEE
                   (NOT TO BE USED FOR SIGNATURE GUARANTEE)

   The undersigned, a participant in the Security Transfer Agents Medallion
Program, hereby guarantees to deliver to the Depositary either the
certificates representing the Shares tendered hereby, in proper form for
transfer, or a Book-Entry Confirmation (as defined in Section 2 of the Offer
to Purchase) of a transfer of such Shares, in any such case together with a
properly completed and duly executed Letter of Transmittal, or a manually
signed facsimile thereof, with any required signature guarantees, or an
Agent's Message (as defined in "Acceptance for Payment and Payment for
Shares" of the Offer to Purchase), and any other documents required by the
Letter of Transmittal within three Nasdaq National Market System trading days
after the date of execution of this Notice of Guaranteed Delivery.

   The Eligible Institution that completes this form must communicate the
guarantee to the Depositary and must deliver the Letter of Transmittal and
certificates for Shares to the Depositary within the time period shown
herein. Failure to do so could result in financial loss to such Eligible
Institution.

Name of Firm:
- ---------------------------------------------     -----------------------------

                                                       (Authorized Signature)

Address:                                          Title:
- ---------------------------------------------     -----------------------------

                                                  Date:
- ---------------------------------------------     -----------------------------
          (Zip Code)

Area Code and Tel. No.:
- ---------------------------------------------


NOTE: DO NOT SEND CERTIFICATES FOR SHARES WITH THIS NOTICE.
      STOCK CERTIFICATES SHOULD BE SENT WITH YOUR LETTER OF TRANSMITTAL.

                                2




<PAGE>

                          OFFER TO PURCHASE FOR CASH
                    ALL OUTSTANDING SHARES OF COMMON STOCK
                                      OF
                                  OPAL, INC.
                                      AT
                             $18.50 NET PER SHARE
                                      BY
                                ORION CORP. I
                         A WHOLLY OWNED SUBSIDIARY OF
                           APPLIED MATERIALS, INC.

 THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK CITY
      TIME, ON TUESDAY, DECEMBER 24, 1996, UNLESS THE OFFER IS EXTENDED.

To Brokers, Dealers, Commercial Banks,
 Trust Companies and Other Nominees:

     We have been appointed by Orion Corp. I, a Delaware corporation (the
"Purchaser") and a wholly owned subsidiary of Applied Materials, Inc., a
Delaware corporation ("Parent"), to act as Dealer Manager in connection with
Purchaser's offer to purchase all outstanding shares of common stock, par
value $.01 per share (the "Shares"), of Opal, Inc., a Delaware corporation
(the "Company"), at a price of $18.50 per Share, net to the seller in cash,
upon the terms and subject to the conditions set forth in the Purchaser's
Offer to Purchase, dated November 26, 1996 (the "Offer to Purchase"), and the
related Letter of Transmittal (which, as amended or supplemented from time to
time, together constitute the "Offer") enclosed herewith. Please furnish
copies of the enclosed materials to those of your clients for whose accounts
you hold Shares registered in your name or in the name of your nominee.

     The Offer is conditioned upon, among other things, there being validly
tendered and not withdrawn prior to the expiration of the Offer a number of
Shares which constitutes at least a majority of the Shares outstanding on a
fully diluted basis. The Offer is also subject to other terms and conditions
contained in the Offer to Purchase.

     Enclosed for your information and use are copies of the following
documents:

        1. Offer to Purchase;

        2. Letter of Transmittal to be used by holders of Shares in accepting
           the Offer and tendering Shares;

        3. Notice of Guaranteed Delivery to be used to accept the Offer if
           the Shares and all other required documents are not immediately
           available or cannot be delivered to Harris Trust Company of New
           York (the "Depositary") by the expiration of the Offer or if the
           procedure for book-entry transfer cannot be completed by the
           expiration of the Offer;

        4. A letter to stockholders of the Company from Mr. Mendy Erad,
           Chairman of the Board of the Company, and Rafi Yizhar, President
           and Chief Executive Officer of the Company, together with a
           Solicitation/ Recommendation Statement on Schedule 14D-9 filed
           with the Securities and Exchange Commission by the Company;

        5. A letter which may be sent to your clients for whose accounts you
           hold Shares registered in your name or in the name of your
           nominee, with space provided for obtaining such clients'
           instructions with regard to the Offer;

        6. Guidelines for Certification of Taxpayer Identification Number on
           Substitute Form W-9; and

        7. Return envelope addressed to the Depositary.




    
<PAGE>

   WE URGE YOU TO CONTACT YOUR CLIENTS AS PROMPTLY AS POSSIBLE. PLEASE NOTE
THAT THE OFFER AND WITHDRAWAL RIGHTS EXPIRE AT 12:00 MIDNIGHT, NEW YORK CITY
TIME, ON TUESDAY, DECEMBER 24, 1996, UNLESS THE OFFER IS EXTENDED.

     The Offer is being made pursuant to an Agreement and Plan of Merger,
dated as of November 24, 1996 (the "Merger Agreement"), by and among the
Company, Parent and the Purchaser. The Merger Agreement provides that, among
other things, following the consummation of the Offer and the satisfaction or
waiver of the other conditions set forth in the Merger Agreement, the
Purchaser will be merged with and into the Company (the "Merger"). At the
effective time of the Merger, each outstanding Share (other than Shares held
in the treasury of the Company, owned by Parent, the Purchaser or any other
wholly owned subsidiary of Parent or held by stockholders who perfect their
appraisal rights under Delaware law) will be converted into the right to
receive the per Share price paid in the Offer, without interest.

     In all cases, payment for Shares accepted for payment pursuant to the
Offer will be made only after timely receipt by the Depositary of
certificates evidencing such Shares or a confirmation of a book-entry
transfer of such Shares into the Depositary's account at one of the
Book-Entry Transfer Facilities (as defined in the Offer to Purchase), a
Letter of Transmittal (or facsimile thereof) properly completed and duly
executed, or an Agent's Message (as defined in the Offer to Purchase), and
any other required documents in accordance with the instructions contained in
the Letter of Transmittal.

     If a holder of Shares wishes to tender Shares, but cannot deliver such
holder's certificates or other required documents, or cannot comply with the
procedure for book-entry transfer, prior to the expiration of the Offer, a
tender of Shares may be effected by following the guaranteed delivery
procedure described in Section 3 of the Offer to Purchase.

     The Purchaser will not pay any fees or commissions to any broker, dealer
or other person (other than the Dealer Manager and the Information Agent as
described in the Offer) in connection with the solicitation of tenders of
Shares pursuant to the Offer. However, Purchaser will reimburse you for
customary mailing and handling expenses incurred by you in forwarding any of
the enclosed materials to your clients. The Purchaser will pay or cause to be
paid any stock transfer taxes payable with respect to the transfer of Shares
to it, except as otherwise provided in Instruction 6 of the Letter of
Transmittal.

     Any inquiries you may have with respect to the Offer and requests for
additional copies of the enclosed material should be addressed to the Dealer
Manager or the Information Agent at their respective addresses and telephone
numbers set forth on the back cover page of the Offer to Purchase.

                                               Very truly yours,

                                               MORGAN STANLEY & CO.
                                                 Incorporated

     NOTHING CONTAINED HEREIN OR IN THE ENCLOSED DOCUMENTS SHALL CONSTITUTE
YOU OR ANY OTHER PERSON THE AGENT OF PARENT, THE PURCHASER, THE COMPANY, THE
DEALER MANAGER, THE INFORMATION AGENT OR THE DEPOSITARY, OR OF ANY AFFILIATE
OF ANY OF THEM, OR AUTHORIZE YOU OR ANY OTHER PERSON TO USE ANY DOCUMENT OR
TO MAKE ANY STATEMENT ON BEHALF OF ANY OF THEM IN CONNECTION WITH THE OFFER
OTHER THAN THE ENCLOSED DOCUMENTS AND THE STATEMENTS CONTAINED THEREIN.

                                2




<PAGE>

                          OFFER TO PURCHASE FOR CASH
                    ALL OUTSTANDING SHARES OF COMMON STOCK
                                      OF
                                  OPAL, INC.
                                      AT
                             $18.50 NET PER SHARE
                                      BY
                                ORION CORP. I
                         A WHOLLY OWNED SUBSIDIARY OF
                           APPLIED MATERIALS, INC.

 THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK CITY
      TIME, ON TUESDAY, DECEMBER 24, 1996, UNLESS THE OFFER IS EXTENDED.

To Our Clients:

     Enclosed for your consideration is an Offer to Purchase, dated November
26, 1996 (the "Offer to Purchase"), and a related Letter of Transmittal
(which, as amended or supplemented from time to time, together constitute the
"Offer") in connection with the offer by Orion Corp. I, a Delaware
corporation (the "Purchaser") and a wholly owned subsidiary of Applied
Materials, Inc., a Delaware corporation ("Parent"), to purchase all
outstanding shares of common stock, par value $.01 per share (the "Shares"),
of Opal, Inc., a Delaware corporation (the "Company"), at a price of $18.50
per Share, net to the seller in cash, upon the terms and subject to the
conditions set forth in the Offer. Also enclosed is the Letter to
Stockholders of the Company from the Chairman and from the President and
Chief Executive Officer of the Company accompanied by the Company's
Solicitation/Recommendation Statement on Schedule 14D-9.

     WE ARE THE HOLDER OF RECORD OF SHARES HELD BY US FOR YOUR ACCOUNT. A
TENDER OF SUCH SHARES CAN BE MADE ONLY BY US AS THE HOLDER OF RECORD AND
PURSUANT TO YOUR INSTRUCTIONS. THE LETTER OF TRANSMITTAL IS FURNISHED TO YOU
FOR YOUR INFORMATION ONLY AND CANNOT BE USED BY YOU TO TENDER SHARES HELD BY
US FOR YOUR ACCOUNT.

     We request instructions as to whether you wish to have us tender on your
behalf any or all of the Shares held by us for your account, upon the terms
and subject to the conditions set forth in the Offer.

     Your attention is invited to the following:

     1. The tender price is $18.50 per Share, net to the seller in cash.

     2. The Offer is being made for all outstanding Shares.

     3. The Board of Directors of the Company has approved the Offer and the
Merger (as defined in the Offer to Purchase) and has determined that the
terms of the Offer and the Merger are fair to and in the best interests of
the stockholders of the Company, and recommends that stockholders accept the
Offer and tender their Shares pursuant to the Offer.

     4. The Offer and withdrawal rights will expire at 12:00 midnight, New
York City time, on Tuesday, December 24, 1996, unless the Offer is extended.

     5. The Offer is conditioned upon, among other things, there being
validly tendered and not withdrawn prior to the expiration of the Offer a
number of Shares which constitutes at least a majority of the Shares
outstanding on a fully diluted basis.

     6. Tendering stockholders will not be obligated to pay brokerage fees or
commissions or, except as otherwise provided in Instruction 6 of the Letter
of Transmittal, stock transfer taxes with respect to the purchase of Shares
by the Purchaser pursuant to the Offer.




    
<PAGE>

     If you wish to have us tender any or all of your Shares, please so
instruct us by completing, executing and returning to us the instruction form
contained in this letter. An envelope in which to return your instructions to
us is enclosed. If you authorize the tender of your Shares, all such Shares
will be tendered unless otherwise specified in your instructions. YOUR
INSTRUCTIONS SHOULD BE FORWARDED TO US IN AMPLE TIME TO PERMIT US TO SUBMIT A
TENDER ON YOUR BEHALF PRIOR TO THE EXPIRATION OF THE OFFER.

     The Offer is made solely by the Offer to Purchase and the related Letter
of Transmittal and is being made to all holders of Shares. The Offer is not
being made to (nor will tenders be accepted from or on behalf of) the holders
of Shares in any jurisdiction in which the making of the Offer or the
acceptance thereof would not be in compliance with the laws of such
jurisdiction. In any jurisdiction where the securities, blue sky or other
laws require the Offer to be made by a licensed broker or dealer, the Offer
shall be deemed to be made on behalf of the Purchaser by Morgan Stanley & Co.
Incorporated, the Dealer Manager, or one or more registered brokers or
dealers licensed under the laws of such jurisdiction.

              INSTRUCTIONS WITH RESPECT TO THE OFFER TO PURCHASE
              FOR CASH ALL OUTSTANDING SHARES OF COMMON STOCK OF
                         OPAL, INC. BY ORION CORP. I

     The undersigned acknowledge(s) receipt of your letter and the enclosed
Offer to Purchase, dated November 26, 1996, and the related Letter of
Transmittal (which, as amended or supplemented from time to time, together
constitute the "Offer"), in connection with the offer by Orion Corp. I, a
Delaware corporation and a wholly owned subsidiary of Applied Materials,
Inc., a Delaware corporation, to purchase all outstanding shares of common
stock, par value $.01 per share (the "Shares"), of Opal, Inc., a Delaware
corporation.

     This will instruct you to instruct your nominee to tender the number of
Shares indicated below (or, if no number is indicated below, all Shares) that
are held for the account of the undersigned, upon the terms and subject to
the conditions set forth in the Offer.

                                               SIGN HERE

              Number of Shares                 ------------------------------
               to be Tendered:
                                               ------------------------------
                       Shares*                          Signature(s)


                                               -------------------------------

                                               -------------------------------
                                                Please type or print name(s)

                                               -------------------------------
Dated:         , 199
                                               -------------------------------
                                                Please type or print address

                                               -------------------------------
                                               Area Code and Telephone Number

                                               -------------------------------
                                                 Taxpayer Identification or
                                                   Social Security Number
- ---------------
* Unless otherwise indicated, it will be assumed that all Shares held by us
  for your account are to be tendered.

                                2




<PAGE>

           GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
                        NUMBER ON SUBSTITUTE FORM W-9

GUIDELINES FOR DETERMINING THE PROPER IDENTIFICATION NUMBER TO GIVE THE
PAYER.--Social Security numbers have nine digits separated by two hyphens:
i.e. 000-00-0000. Employer identification numbers have nine digits separated
by only one hyphen: i.e. 00-0000000. The table below will help determine the
number to give the payer.

- -----------------------------------------------------------------------------

<TABLE>
<CAPTION>
                                  GIVE THE                                                    GIVE THE EMPLOYER
                                  SOCIAL SECURITY                                             IDENTIFICATION
FOR THIS TYPE OF ACCOUNT:         NUMBER OF--                   FOR THIS TYPE OF ACCOUNT:     NUMBER OF--

- --------------------------------  ----------------------------  ----------------------------  ----------------------------

<S>                               <C>                           <C>                           <C>
1.An individual's account         The individual                8.Sole proprietorship         The owner(4)
                                                                  account

2.Two or more individuals (joint  The actual owner of the       9.A valid trust, estate, or   The legal entity (Do not
  account)                        account or, if combined         pension trust               furnish the identifying
                                  funds, the first individual                                 number of the personal
                                  on the account(1)                                           representative or trustee
                                                                                              unless the legal entity
                                                                                              itself is not designated in
                                                                                              the account title.)(5)

3.Husband and wife (joint         The actual owner of the       10.Corporate account          The corporation
  account)                        account or, if joint funds,
                                  either person(1)

4.Custodian account of a minor    The minor(2)                  11.Religious, charitable, or  The organization
  (Uniform Gift to Minors Act)                                     educational organization
                                                                   account

5.Adult and minor (joint          The adult or, if the minor    12.Partnership account held   The partnership
  account)                        is the only contributor, the     in the name of the
                                  minor(1)                         business

6.Account in the name of          The ward, minor, or           13.Association, club, or      The organization
  guardian or committee for a     incompetent person(3)            other tax-exempt
  designated ward, minor, or                                       organization
  incompetent person

7.A.The usual revocable savings   The grantor-trustee(1)        14.A broker or registered     The broker or nominee
  trust account (grantor is also                                   nominee
  trustee)

  B.So-called trust account that  The actual owner(1)           15.Account with the           The public entity
  is not a legal or valid trust                                    Department of Agriculture
  under state law                                                  in the name of a public
                                                                   entity (such as a State
                                                                   or local government,
                                                                   school district, or
                                                                   prison) that receives
                                                                   agricultural program
                                                                   payments

</TABLE>

- -----------------------------------------------------------------------------

   (1) List first and circle the name of the person whose number you furnish.

   (2) Circle the minor's name and furnish the minor's social security number.

   (3) Circle the ward's, minor's or incompetent person's name and furnish
       such person's social security number.

   (4) Show your individual name. You may also enter your business name. You
       may use either your Social Security number or your Employer
       Identification number.

   (5) List first and circle the name of the legal trust, estate or pension
       trust.

NOTE: If no name is circled when there is more than one name, the number will
      be considered to be that of the first name listed.



    
<PAGE>

           GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
                        NUMBER ON SUBSTITUTE FORM W-9
                                    PAGE 2

OBTAINING A NUMBER

If you don't have a taxpayer identification number or you don't know your
number, obtain Form SS-5, Application for a Social Security Number Card (for
individuals), or Form SS-4, Application for Employer Identification Number
(for businesses and all other entities), at the local office of the Social
Security Administration or the Internal Revenue Service (the "IRS") and apply
for a number.

PAYEES EXEMPT FROM BACKUP WITHHOLDING

Payees specifically exempted from backup withholding on ALL payments include
the following:

o  A corporation.

o  A financial institution.

o  An organization exempt from tax under Section 501(a) of the Internal
   Revenue Code of 1986, as amended (the "Code"), or an individual retirement
   plan.

o  The United States or any agency or instrumentality thereof.

o  A State, the District of Columbia, a possession of the United States, or
   any subdivision or instrumentality thereof.

o  A foreign government, a political subdivision of a foreign government, or
   any agency or instrumentality thereof.

o  An international organization or any agency or instrumentality thereof.

o  A registered dealer in securities or commodities registered in the U.S. or
   a possession of the U.S.

o  A real estate investment trust.

o  A common trust fund operated by a bank under Section 584(a) of the Code.

o  An exempt charitable remainder trust, or a non-exempt trust described in
   Section 4947(a)(1) of the Code.

o  An entity registered at all times during the tax year under the Investment
   Company Act of 1940.

o  A foreign central bank of issue.

Payments of dividends and patronage dividends not generally subject to backup
withholding include the following:

o  Payments to nonresident aliens subject to withholding under Section 1441
   of the Code.

o  Payments to partnerships not engaged in a trade or business in the U.S.
   and which have at least one nonresident partner.

o  Payments of patronage dividends where the amount received is not paid in
   money.

o  Payments made by certain foreign organizations.

o  Payments made to a nominee.

Payments of interest not generally subject to backup withholding include the
following:

o  Payments of interest on obligations issued by individuals. Note: You may
   be subject to backup withholding if this interest is $600 or more and is
   paid in the course of the payer's trade or business and you have not
   provided your correct taxpayer identification number to the payer.



    
<PAGE>

o  Payments of tax-exempt interest (including exempt--interest dividends
   under Section 852 of the Code).

o  Payments described in Section 6049(b)(5) of the Code to nonresident
   aliens.

o  Payments on tax-free covenant bonds under Section 1451 of the Code.

o  Payments made by certain foreign organizations.

o  Payments made to a nominee.

Exempt payees described above should file Form W-9 to avoid possible
erroneous backup withholding. FILE THIS FORM WITH THE PAYER, FURNISH YOUR
TAXPAYER IDENTIFICATION NUMBER, WRITE "EXEMPT" ON THE FACE OF THE FORM, SIGN
AND DATE THE FORM AND RETURN IT TO THE PAYER. IF YOU ARE A NON-RESIDENT ALIEN
OR A FOREIGN ENTITY NOT SUBJECT TO BACKUP WITHHOLDING, FILE WITH PAYER A
COMPLETED INTERNAL REVENUE FORM W-8 (CERTIFICATE OF FOREIGN STATUS).

Certain payments other than interest, dividends, and patronage dividends,
that are not subject to information reporting are also not subject to backup
withholding. For details, see Sections 6041, 6041(a), 6045, 6050A and 6050N
of the Code and the regulations promulgated thereunder.

PRIVACY ACT NOTICE.--Section 6109 requires most recipients of dividend,
interest, or other payments to give taxpayer identification numbers to payers
who must report the payments to the IRS. The IRS uses the numbers for
identification purposes. Payers must be given the numbers whether or not
recipients are required to file tax returns. Payers must generally withhold
31% of taxable interest, dividend, and certain other payments to a payee who
does not furnish a taxpayer identification number to a payer. Certain
penalties may also apply.

PENALTIES

(1) PENALTY FOR FAILURE TO FURNISH TAXPAYER IDENTIFICATION NUMBER.--If you
fail to furnish your correct taxpayer identification number to a payer, you
are subject to a penalty of $50 for each such failure unless your failure is
due to reasonable cause and not to willful neglect.

(2) CIVIL PENALTY FOR FALSE INFORMATION WITH RESPECT TO WITHHOLDING.--If you
make a false statement with no reasonable basis which results in no
imposition of backup withholding, you are subject to a penalty of $500.

(3) CRIMINAL PENALTY FOR FALSIFYING INFORMATION.--Willfully falsifying
certifications or affirmations may subject you to criminal penalties
including fines and/or imprisonment.

FOR ADDITIONAL INFORMATION CONTACT YOUR TAX CONSULTANT OR THE INTERNAL
REVENUE SERVICE




<PAGE>


  This announcement is neither an offer to purchase nor a solicitation of an
 offer to sell Shares. The Offer is made solely by the Offer to Purchase dated
 November 26, 1996 and the related Letter of Transmittal and is being made to
  all holders of Shares. The Offer is not being made to (nor will tenders be
 accepted from or on behalf of) holders of Shares in any jurisdiction in which
 the making of the Offer or the acceptance thereof would not be in compliance
 with the laws of such jurisdiction. In any jurisdiction where the securities,
  blue sky or other laws require the Offer to be made by a licensed broker or
  dealer, the Offer shall be deemed to be made on behalf of the Purchaser by
    Morgan Stanley & Co. Incorporated or one or more registered brokers or
                   dealers licensed under the laws of such jurisdiction.

                     NOTICE OF OFFER TO PURCHASE FOR CASH

                   ALL OUTSTANDING SHARES OF COMMON STOCK

                                      OF

                                  OPAL, INC.

                                      AT

                             $18.50 NET PER SHARE

                                      BY

                                ORION CORP. I

                         A WHOLLY OWNED SUBSIDIARY OF

                           APPLIED MATERIALS, INC.

   Orion Corp. I, a Delaware corporation (the "Purchaser") and a wholly owned
subsidiary of Applied Materials, Inc., a Delaware corporation ("Parent"), is
offering to purchase all outstanding shares of common stock, par value $.01
per share (the "Shares"), of Opal, Inc., a Delaware corporation (the
"Company"), at a price of $18.50 per Share, net to the seller in cash, upon
the terms and subject to the conditions set forth in the Offer to Purchase,
dated November 26, 1996 (the "Offer to Purchase"), and in the related Letter
of Transmittal (which, as amended or supplemented from time to time, together
constitute the "Offer"). Following the Offer, the Purchaser intends to effect
the Merger described below.

- -------------------------------------------------------------------------------

   THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK
   CITY TIME, ON TUESDAY, DECEMBER 24, 1996, UNLESS THE OFFER IS EXTENDED.

- -------------------------------------------------------------------------------

   The Offer is conditioned upon, among other things, there being validly
tendered and not withdrawn prior to the expiration of the Offer a number of
Shares which constitutes at least a majority of the Shares outstanding on a
fully diluted basis. The Offer is also subject to other terms and conditions.

   The Offer is being made pursuant to an Agreement and Plan of Merger, dated
as of November 24, 1996 (the "Merger Agreement"), by and among Parent, the
Purchaser and the Company. The Merger Agreement provides that, among other
things, as soon as practicable after the purchase of Shares pursuant to the
Offer and the satisfaction of the other conditions set forth in the Merger
Agreement and in accordance with the relevant provisions of the General
Corporation Law of the State of Delaware ("DGCL"), the Purchaser will be
merged with and into the Company (the "Merger"). Following





    
<PAGE>

consummation of the Merger, the Company will continue as the surviving
corporation and will be a wholly owned subsidiary of Parent. At the effective
time of the Merger (the "Effective Time"), each Share issued and outstanding
immediately prior to the Effective Time (other than Shares held in the
treasury of the Company or owned by the Purchaser, Parent or any other wholly
owned subsidiary of Parent, and any Shares held by stockholders exercising
appraisal rights pursuant to Section 262 of the DGCL) will be cancelled and
converted into the right to receive $18.50 in cash, without interest.

   In connection with the Merger Agreement, Parent and the Purchaser have
entered into Stockholder Agreements dated as of November 24, 1996 with
certain stockholders of the Company who beneficially own an aggregate of
4,288,634 Shares pursuant to which, among other things, such stockholders
have agreed to tender their Shares in the Offer, and have granted Parent an
option to acquire their Shares at $18.50 per Share, upon the terms and
subject to the conditions thereof in the event of certain terminations of the
Offer or the Merger Agreement.

   THE BOARD OF DIRECTORS OF THE COMPANY HAS DETERMINED THAT THE TERMS OF THE
OFFER AND THE MERGER ARE FAIR TO AND IN THE BEST INTERESTS OF THE
STOCKHOLDERS OF THE COMPANY AND RECOMMENDS THAT STOCKHOLDERS ACCEPT THE OFFER
AND TENDER THEIR SHARES PURSUANT TO THE OFFER.

   For purposes of the Offer, the Purchaser will be deemed to have accepted
for payment (and thereby purchased) Shares validly tendered and not properly
withdrawn as, if and when the Purchaser gives oral or written notice to
Harris Trust Company of New York (the "Depositary") of the Purchaser's
acceptance for payment of such Shares pursuant to the Offer. Upon the terms
and subject to the conditions of the Offer, payment for Shares accepted for
payment pursuant to the Offer will be made by deposit of the purchase price
therefor with the Depositary, which will act as agent for tendering
stockholders for the purpose of receiving payments from the Purchaser and
transmitting such payments to tendering stockholders whose Shares have been
accepted for payment. Under no circumstances will interest on the purchase
price for Shares be paid, regardless of any delay in making such payment. In
all cases, payment for Shares tendered and accepted for payment pursuant to
the Offer will be made only after timely receipt by the Depositary of (i) the
certificates evidencing such Shares or timely confirmation of a book-entry
transfer of such Shares into the Depositary's account at one of the
Book-Entry Transfer Facilities (as defined in the Offer to Purchase) pursuant
to the procedures set forth in Section 3 of the Offer to Purchase, (ii) the
Letter of Transmittal (or a facsimile thereof), properly completed and duly
executed, with any required signature guarantees, or an Agent's Message (as
defined in the Offer to Purchase) in connection with a book-entry transfer,
and (iii) any other documents required under the Letter of Transmittal.

   The Purchaser expressly reserves the right, in its sole discretion (but
subject to the terms and conditions of the Merger Agreement), at any time and
from time to time, to extend for any reason the period of time during which
the Offer is open, including the occurrence of any of the conditions
specified in Section 14 of the Offer to Purchase, by giving oral or written
notice of such extension to the Depositary. Any such extension will be
followed as promptly as practicable by public announcement thereof, such
announcement to be made no later than 9:00 a.m., New York City time, on the
next business day after the previously scheduled expiration date of the
Offer. During any such extension, all Shares previously tendered and not
withdrawn will remain subject to the Offer, subject to the rights of a
tendering stockholder to withdraw such stockholder's Shares.

   Tenders of Shares made pursuant to the Offer are irrevocable except that
such Shares may be withdrawn at any time prior to 12:00 Midnight, New York
City time, on Tuesday, December 24, 1996 (or the latest time and date at
which the Offer, if extended by the Purchaser, shall expire) and, unless
theretofore accepted for payment by the Purchaser pursuant to the Offer, may
also be withdrawn at any time after January 24, 1997. For a withdrawal to be
effective, a written, telegraphic or facsimile transmission notice of
withdrawal must be timely received by the Depositary at one of its addresses
set forth on the back cover page of the Offer to Purchase. Any such notice of
withdrawal must specify the name of the person who tendered the Shares to be
withdrawn, the number of Shares to be withdrawn and the name of the
registered holder of such Shares, if different from that of the person who
tendered such Shares. If share certificates evidencing Shares to be withdrawn
have been delivered or otherwise identified to the Depositary, then, prior to
the physical release of such Share certificates, the serial numbers shown on
such Share certificates must be submitted to the Depositary and the
signature(s) on the notice of withdrawal must be guaranteed by an Eligible
Institution (as defined in the Offer to Purchase), unless such Shares have
been tendered for the account of an Eligible Institution. If Shares have been
tendered pursuant to the procedure for book-entry transfer as set forth in
Section 3 of the Offer to Purchase, any notice of withdrawal must specify the
name and number of the account at the Book-Entry Transfer Facility to be
credited with the withdrawn Shares. All questions as to the form and validity
(including the time of receipt) of any notice of withdrawal will be
determined by the Purchaser, in its sole discretion, whose determination will
be final and binding.

   The information required to be disclosed by Rule 14d-6(e)(1)(vii) of the
General Rules and Regulations under the Securities Exchange Act of 1934, as
amended, is contained in the Offer to Purchase and is incorporated herein by
reference.





    



   The Company has provided the Purchaser with the Company's stockholder list
and security position listings for the purpose of disseminating the Offer to
holders of Shares. The Offer to Purchase and the related Letter of
Transmittal will be

                                2



    
<PAGE>

mailed to record holders of Shares whose names appear on the Company's
stockholder list and will be furnished to brokers, dealers, commercial banks,
trust companies and similar persons whose names, or the names of whose
nominees, appear on the stockholder list or, if applicable, who are listed as
participants in a clearing agency's security position listing for subsequent
transmittal to beneficial owners of Shares.

   THE OFFER TO PURCHASE AND THE RELATED LETTER OF TRANSMITTAL CONTAIN
IMPORTANT INFORMATION WHICH SHOULD BE READ BEFORE ANY DECISION IS MADE WITH
RESPECT TO THE OFFER.

   Questions and requests for assistance may be directed to the Information
Agent or the Dealer Manager at their respective addresses and telephone
numbers as set forth below. Additional copies of the Offer to Purchase and
the related Letter of Transmittal and other tender offer materials may be
obtained from the Information Agent as set forth below. Such copies will be
furnished promptly at the Purchaser's expense. No fees or commissions will be
paid to brokers, dealers or other persons (other than the Dealer Manager and
the Information Agent) for soliciting tenders of Shares pursuant to the
Offer.

                   The Information Agent for the Offer is:


 #############################################################################

                       GEORGESON & COMPANY INC. LOGO

 #############################################################################


                              Wall Street Plaza
                           New York, New York 10005
                Banks and Brokers Call Collect: (212) 440-9800

                                      or

                   All Others Call Toll Free: 800-223-2064



                     The Dealer Manager for the Offer is:

                             MORGAN STANLEY & CO.
                                 INCORPORATED

                            555 California Street
                                  Suite 2200
                       San Francisco, California 94104
                                (415) 576-2331



November 26, 1996

                                3




<PAGE>

PRESS RELEASE

          APPLIED MATERIALS TO ENTER METROLOGY AND INSPECTION MARKET
      THROUGH THE ACQUISITION OF OPAL, INC. AND ORBOT INSTRUMENTS, LTD.

   SANTA CLARA, Calif., November 24, 1996--Applied Materials announced today
that it is entering the metrology and inspection equipment market through the
acquisition of Opal, Inc. (NASDAQ symbol "OPAL"), a leading supplier of
CD-SEM systems for approximately $175 million, and Orbot Instruments, Ltd., a
supplier of wafer and reticle inspection systems with leading-edge
technologies, for approximately $110 million in cash.

   "Our entry into the market for metrology and inspection equipment is
consistent with our long-standing strategy of serving our global customers
with a broader array of enabling technology required to economically
manufacture new generations of advanced semiconductor devices," said James C.
Morgan, chairman and chief executive officer. "As independent companies, Opal
and Orbot Instruments each have been gaining rapid customer acceptance.
Together with Applied Materials, we expect to leverage their technology
across a significantly larger customer base."

   According to industry research, the market served by products from Opal
and Orbot is expected to grow at a compound annual growth rate of more than
22 percent, from $1.25 billion in 1996 to $3.43 billion in 2001.

   Opal is a leading supplier of CD-SEM systems for use in semiconductor
manufacturing. CD-SEM systems use scanning electron microscopes (SEMs) to
measure certain critical dimensions (CDs) of integrated circuits at various
stages of the manufacturing process. Opal's revenues for the 12-month period
ended September 30, 1996 were $62 million. Opal's revenues for the fiscal
year ended December 31, 1995 were $45 million. Opal conducts its principal
sales and marketing activities at its facility in Santa Clara, California,
and its research, development and manufacturing activities in Nes Ziona,
Israel. Additionally, Opal recently acquired ICT of Heimstetten, Germany,
which manufactures scanning electron microscope columns. Opal was
incorporated in Delaware in 1986 and employs approximately 325 people.

   Pursuant to its agreement with Opal, Applied Materials is expected to
commence a cash tender offer on or before Wednesday, November 27 for any and
all outstanding shares of Opal's common stock at $18.50 per share net to the
seller in cash. Applied Materials intends to acquire any Opal shares not
purchased in the tender offer in a second-step merger. Proceeds to the
shareholders of Opal will approximate $175 million, while the net cash cost
of the transaction to Applied Materials is expected to be approximately $145
million, after considering transaction costs and Opal's available cash.

   Applied Materials' acquisition of Opal has been approved by the boards of
directors of both companies. Applied Materials has also entered into
agreements with certain shareholders of Opal, Clal Electronics Industries,
Ltd. and Orbotech, Ltd., and two executive officers of Opal, representing in
total 49 percent of Opal's shares outstanding, whereby they have agreed to
tender shares into Applied Materials' offer and have granted Applied
Materials an option to purchase their shares. The Opal offer and merger are
subject to the purchase of a majority of the outstanding shares of Opal's
common stock as well as other customary conditions.

   "Together with the Opal Board of Directors, I believe that this merger
represents a strategic opportunity with significant benefits for our
customers, our shareholders and our employees," said Mendy Erad, chairman of
Opal. "Leveraging Israel's strong technology talent base, Opal's world-class
technology and Applied Materials' global infrastructure will allow us to
provide advanced metrology systems and services to meet our customers'
emerging requirements. We believe that this merger will enable even faster
growth than Opal has achieved during the past few years."

   Orbot develops, manufactures, markets and services automated optical
inspection systems for use in the production of semiconductors. Orbot
produces systems for inspecting patterned silicon wafers for yield
enhancement during the semiconductor manufacturing process, as well as
systems for inspecting the



    
<PAGE>

reticles, or masks, which are used during the patterning process. Orbot's
revenues for the 12-month period ended September 30, 1996 were $36 million.
Orbot's revenues for the fiscal year ended December 31, 1995 were $19
million. Orbot was founded in 1988 and has its headquarters in Yavne, Israel.
Orbot employs approximately 200 people.

   Applied Materials will purchase Orbot for approximately $110 million in
cash. Applied Materials' acquisition of Orbot has been approved by the boards
of directors of both companies. The Orbot acquisition is subject to certain
customary conditions.

   "By joining Applied Materials, we will be able to capitalize on our
strengths in reticle inspection, and add tremendous leverage to our emerging
wafer inspection capability, to better serve our customers in these rapidly
growing markets," said Zvi Lapidot, chariman of Orbot.

   Applied Materials began operating in Israel in 1990 with the opening of
Applied Materials Israel (AMIL). AMIL develops and manufactures control
systems for a number of Applied Materials' products distributed worldwide.
Applied Materials has since added a second subsidiary to provide after-sales
support services for the local customer base.

   Both transactions are expected to be completed during Applied Materials'
first fiscal quarter ending January 26, 1997. Applied Materials expects that
these two acquisitions will result in a first quarter fiscal 1997 pre-tax
charge for acquired in-process research and development in the range of
$50-$60 million, or $0.27 to $0.32 per share after tax.

   Applied Materials, Inc. is a Fortune 500 global growth company and the
world's largest supplier of wafer fabrication systems and services to the
global semiconductor industry. Applied Materials is traded on the Nasdaq
National Market under the symbol "AMAT." Applied Materials' web site is
http://www.Applied Materials.com.










Release:    Immediate

Contact: Shannon Fryhoff    (editorial/media)
         (408) 986-7229


         Susan Overstreet   (investment community)
         (408) 748-5227


        Santa Clara, California--November 26, 1996--Applied Materials, Inc.
announced today that Orion Corp. I, its wholly owned subsidiary, has commenced a
cash tender offer for all outstanding shares of common stock of Opal, Inc. at
$18.50 per share.

     The offer is being made pursuant to the previously announced merger
agreement between Applied Materials and Opal.  The offer is conditioned upon,
among other things, the tender of a majority of the shares outstanding on a
fully diluted basis.  The offer and withdrawal right are scheduled to expire at
12:00 midnight on Tuesday, December 24, 1996.  Morgan Stanley & Co. Incorporated
is acting as the Dealer Manager in connection with the offer and Georgeson &
Company Inc.  is acting as the Information Agent in connection with the offer.

        Applied Materials, Inc. is a Fortune 500 global growth company and the
world's largest supplier of wafer fabrication systems and services to the global
semiconductor industry.  Applied Materials is traded on the Nasdaq National
Market under the symbol "AMAT."  Applied Materials web site is
http://www.AppliedMaterials.com







               --------------------------------------------------




                          AGREEMENT AND PLAN OF MERGER


                                  by and among


                            APPLIED MATERIALS, INC.,


                                 ORION CORP. I,


                                      and


                                   OPAL, INC.


                                  dated as of


                               November 24, 1996



               --------------------------------------------------







    
<PAGE>




                             Index of Defined Terms
                             ----------------------

<TABLE>
<CAPTION>
Defined Term                                              Section No.
- ------------                                              -----------
<S>                                                           <C>
Agreement..............................................        Recitals
Acquisition Proposal...................................        5.4
Appointment Date.......................................        5.1
Balance Sheet..........................................        3.10(a)
Benefit Plans..........................................        3.9(a)
By-laws................................................        1.4
Certificate of Incorporation...........................        1.4
Certificates...........................................        2.2(b)
Chief Scientist........................................        3.10(p)
Closing................................................        1.6
Closing Date...........................................        1.6
Code...................................................        3.9(a)
Company................................................        Recitals
Company Agreements.....................................        3.4
Company Disclosure Schedule............................        3.0
Company Option.........................................        2.4(b)
Company SEC Documents..................................        3.5
Confidentiality Agreement..............................        5.2
Copyrights.............................................        3.12(l)
DGCL...................................................        1.2(a)
Dissenting Stockholders................................        2.1(c)
D&O Insurance..........................................        5.9(b)
Effective Time.........................................        1.5
Encumbrances...........................................        3.2(b)
ERISA..................................................        3.9(a)
ERISA Affiliate........................................        3.9(a)
Exchange Act...........................................        1.1(a)
Financial Statements...................................        3.5
fully diluted basis....................................        1.1(a)
GAAP...................................................        3.5
Governmental Entity....................................        3.4
HSR Act................................................        3.4
ICT....................................................        3.15
ICT Agreements.........................................        3.15
Indemnified Party......................................        5.9(a)
Independent Directors..................................        1.3
Intellectual Property..................................        3.12(l)
Licenses...............................................        3.12(l)
Mask Works.............................................        3.12(l)
Merger.................................................        1.4
Merger Consideration...................................        2.1(c)
Minimum Condition......................................        1.1(a)
Offer..................................................        1.1(a)
Offer Documents........................................        1.1(b)
Offer Price............................................        1.1(a)
</TABLE>

                                       i




    
<PAGE>


<TABLE>
<CAPTION>
Defined Term                                              Section No.
- ------------                                              -----------
<S>                                                           <C>
Offer to Purchase......................................        1.1(a)
Option Exchange Ratio..................................        2.4(a)
Option Plan............................................        2.4(a)
Parent.................................................        Recitals
Parent Common Stock....................................        2.4(a)
Parent Option..........................................        2.4(a)
Parent Option Plan.....................................        2.4(a)
Patents................................................        3.12(l)
Paying Agent...........................................        2.2(a)
Preferred Stock........................................        3.2(a)
Proxy Statement........................................        1.8(a)
Purchaser..............................................        Recitals
Purchaser Common Stock.................................        2.1
Schedule 14D-1.........................................        1.1(b)
Schedule 14D-9.........................................        1.2(b)
SEC....................................................        1.1(b)
Secretary of State.....................................        1.5
Securities Act.........................................        3.5
Service................................................        3.9(g)
Shares.................................................        1.1(a)
Special Meeting........................................        1.8(a)
Stockholder Agreements.................................        Recitals
Subsidiary.............................................        3.1
Superior Proposal......................................        5.4(a)
Surviving Corporation..................................        1.4
Tax....................................................        3.10(r)
Taxes..................................................        3.10(r)
Tax Return.............................................        3.10(r)
Termination Fee........................................        8.1(b)
Trademarks.............................................        3.12(l)
Transactions...........................................        1.2(a)
Trustee................................................        2.4(a)
Unvested Company Option................................        2.4(a)
Vested Company Option..................................        2.4(b)
Voting Debt............................................        3.2(a)
1995 Plan..............................................        2.4(c)
1995 Premium...........................................        5.9(b)
</TABLE>

                                       ii




    
<PAGE>




                               TABLE OF CONTENTS
                               -----------------

<TABLE>
<CAPTION>
                                                                                                      Page
                                                                                                      ----
                                   ARTICLE I
        <S>           <C>                                                                             <C>
                            THE OFFER AND MERGER.......................................................  1
         Section 1.1  The Offer........................................................................  1
         Section 1.2  Company Actions..................................................................  4
         Section 1.3  Directors........................................................................  7
         Section 1.4  The Merger.......................................................................  8
         Section 1.5  Effective Time...................................................................  9
         Section 1.6  Closing..........................................................................  9
         Section 1.7  Directors and Officers of the Surviving Corporation..............................  9
         Section 1.8  Stockholders' Meeting............................................................ 10
         Section 1.9  Merger Without Meeting of Stockholders........................................... 11

                                   ARTICLE II
                           CONVERSION OF SECURITIES.................................................... 11
         Section 2.1  Conversion of Capital Stock...................................................... 11
         Section 2.2  Exchange of Certificates......................................................... 12
         Section 2.3  Dissenters' Rights............................................................... 14
         Section 2.4  Company Plans.................................................................... 14

                                  ARTICLE III
                               REPRESENTATIONS AND WARRANTIES OF THE COMPANY........................... 17
         Section 3.1  Organization..................................................................... 18
         Section 3.2  Capitalization................................................................... 18
         Section 3.3  Authorization; Validity of Agreement; Company Action............................. 20
         Section 3.4  Consents and Approvals; No Violations............................................ 20
         Section 3.5  SEC Reports and Financial Statements............................................. 21
         Section 3.6  Absence of Certain Changes....................................................... 22
         Section 3.7  No Undisclosed Liabilities....................................................... 23
         Section 3.8  Litigation....................................................................... 23
         Section 3.9  Employee Benefit Plans; ERISA.................................................... 23
         Section 3.10 Tax Matters; Government Benefits................................................. 26
         Section 3.11  Title and Condition of Properties............................................... 31
         Section 3.12  Intellectual Property........................................................... 32
         Section 3.13  Employment Matters.............................................................. 37
         Section 3.14  Compliance with Laws............................................................ 37
         Section 3.15  Contracts....................................................................... 37
         Section 3.16  Potential Conflicts of Interest................................................. 38
         Section 3.17  Vote Required................................................................... 39
         Section 3.18  Suppliers and Customers......................................................... 39
         Section 3.19  Information in Proxy Statement.................................................. 40
         Section 3.20  Opinion of Financial Advisor.................................................... 40
</TABLE>


                                                i




    
<PAGE>


<TABLE>
<CAPTION>

                                                                                                      Page
                                                                                                      ----

                                   ARTICLE IV
        <S>           <C>                                                                             <C>
                         REPRESENTATIONS AND WARRANTIES
                           OF PARENT AND THE PURCHASER................................................. 40
         Section 4.1  Organization..................................................................... 40
         Section 4.2  Authorization; Validity of Agreement; Necessary Action........................... 41
         Section 4.3  Consents and Approvals; No Violations............................................ 41
         Section 4.4  Information in Proxy Statement................................................... 42
         Section 4.5  Financing........................................................................ 42
         Section 4.6  Options.......................................................................... 43
         Section 4.7  Company Shares................................................................... 43

                                   ARTICLE V
                                   COVENANTS........................................................... 43
         Section 5.1  Interim Operations of the Company................................................ 43
         Section 5.2  Access; Confidentiality.......................................................... 46
         Section 5.3  Consents and Approvals........................................................... 47
         Section 5.4  No Solicitation.................................................................. 47
         Section 5.5  Brokers or Finders............................................................... 50
         Section 5.6  Additional Agreements............................................................ 50
         Section 5.7  Publicity........................................................................ 51
         Section 5.8  Notification of Certain Matters.................................................. 51
         Section 5.9  Directors' and Officers' Insurance and Indemnification........................... 51
         Section 5.10 Purchaser Compliance............................................................. 53
         Section 5.11 Actions of Parent and the Purchaser.............................................. 53
         Section 5.12 ICT Action....................................................................... 53


                                   ARTICLE VI
                                   CONDITIONS.......................................................... 53
         Section 6.1  Conditions to Each Party's Obligation to Effect the Merger....................... 53
         Section 6.2. Condition to Parent's and the Purchaser's Obligations to Effect the Merger....... 54

                                  ARTICLE VII
                                  TERMINATION.......................................................... 55
         Section 7.1  Termination...................................................................... 55
         Section 7.2  Effect of Termination............................................................ 57

                                  ARTICLE VIII
                                 MISCELLANEOUS......................................................... 57
         Section 8.1  Fees and Expenses................................................................ 57
         Section 8.2  Amendment and Modification....................................................... 58
         Section 8.3  Nonsurvival of Representations and Warranties.................................... 58
         Section 8.4  Notices.......................................................................... 58
         Section 8.5  Interpretation................................................................... 59
</TABLE>

                                               ii




    
<PAGE>


<TABLE>
<CAPTION>

                                                                                                      Page
                                                                                                      ----
        <S>           <C>                                                                             <C>
         Section 8.6  Counterparts..................................................................... 60
         Section 8.7  Entire Agreement; No Third Party Beneficiaries................................... 60
         Section 8.8  Severability..................................................................... 60
         Section 8.9  Governing Law.................................................................... 60
         Section 8.10 Assignment....................................................................... 60
         Section 8.11 Transfer and Similar Taxes....................................................... 61

Certain Conditions of the Offer....................................................................Annex A
</TABLE>

                                      iii




    
<PAGE>




                                    AGREEMENT AND PLAN OF MERGER
                                    ----------------------------


                  AGREEMENT AND PLAN OF MERGER (hereinafter referred to as this
"Agreement"), dated as of November 24, 1996, by and among Applied Materials,
Inc., a Delaware corporation ("Parent"), Orion Corp. I, a Delaware corporation
and a wholly owned subsidiary of Parent (the "Purchaser"), and Opal, Inc., a
Delaware corporation (the "Company").

                  WHEREAS, the Board of Directors of each of Parent, the
Purchaser and the Company has approved, and deems it advisable and in the best
interests of its respective stockholders to consummate, the acquisition of the
Company by Parent upon the terms and subject to the conditions set forth
herein; and

                  WHEREAS, concurrently with the execution of this Agreement,
and as an inducement to Parent and the Purchaser to enter into this Agreement,
certain stockholders of the Company have each entered into a Stockholder
Agreement, dated as of the date hereof (collectively, the "Stockholder
Agreements"), among Parent, the Purchaser and the stockholder named therein
providing, among other things, that such stockholders will vote in favor of the
Merger and will grant a proxy to Parent for that purpose;

                  NOW, THEREFORE, in consideration of the foregoing and the
mutual representations, warranties, covenants and agreements set forth herein,
the parties hereto agree as follows:

                                   ARTICLE I

                                        THE OFFER AND MERGER

                  Section 1.1  The Offer.

                           (a)  As promptly as practicable (but in no
event later than five business days after the public announcement of the
execution hereof), the Purchaser shall commence (within the meaning of Rule
14d-2 under the Securities Exchange Act of 1934, as amended (the "Exchange
Act")) a tender offer (the "Offer") for all of the outstanding shares of Common
Stock, par value $.01






    
<PAGE>




per share (the "Shares"), of the Company at a price of $18.50 per Share, net to
the seller in cash (such price, or such other price per Share as may be paid in
the Offer, being referred to herein as the "Offer Price"), subject to there
being validly tendered and not withdrawn prior to the expiration of the Offer,
that number of Shares which represents at least a majority of the Shares
outstanding on a fully diluted basis (the "Minimum Condition") and to the other
conditions set forth in Annex A hereto, and shall consummate the Offer in
accordance with its terms ("fully diluted basis" means issued and outstanding
Shares and Shares subject to issuance under Vested Company Options (as defined
in Section 2.4(b)) and Shares subject to issuance upon exercise of outstanding
warrants, calls, subscriptions or other rights, agreements, arrangements or
commitments of any character relating to the issued or unissued capital stock
of the Company or securities convertible or exchangeable for such capital
stock, but shall not include Unvested Company Options). The obligations of the
Purchaser to accept for payment and to pay for any Shares validly tendered on
or prior to the expiration of the Offer and not withdrawn shall be subject only
to the Minimum Condition and the other conditions set forth in Annex A hereto.
The Offer shall be made by means of an offer to purchase (the "Offer to
Purchase") containing the terms set forth in this Agreement, the Minimum
Condition and the other conditions set forth in Annex A hereto. The Purchaser
shall not amend or waive the Minimum Condition and shall not decrease the Offer
Price or decrease the number of Shares sought, or amend any other condition of
the Offer in any manner adverse to the holders of the Shares (other than with
respect to insignificant changes or amendments, not including changes in the
form of consideration payable under the Offer, in any of the conditions in
Annex A, or in the expiration date of the Offer, and subject to the last
sentence of this Section 1.1(a)) without the written consent of the Company
(such consent to be authorized by the Board of Directors of the Company or a
duly authorized committee thereof); provided, however, that if on the initial
scheduled expiration date of the Offer which shall be 20 business days after
the date the Offer is commenced, all conditions to the Offer shall not have
been satisfied or waived, the Purchaser may, from time to time, in its sole
discretion, extend the expiration date. The Purchaser shall, on the terms and
subject to the prior satisfaction or waiver of the conditions of the


                                                  2




    
<PAGE>




Offer, accept for payment and pay for Shares tendered as soon as it is legally
permitted to do so under applicable law; provided, however, that if,
immediately prior to the initial expiration date of the Offer (as it may be
extended), the Shares tendered and not withdrawn pursuant to the Offer equal
less than 90% of the outstanding Shares, the Purchaser may extend the Offer for
a period not to exceed thirty business days, notwithstanding that all
conditions to the Offer are satisfied as of such expiration date of the Offer,
provided that upon such extension Parent and the Purchaser shall be deemed to
have waived all of the conditions set forth in Annex A other than the Minimum
Condition; provided, however, that if at the initial expiration date for the
Offer, any or all of the conditions set forth in clauses (i), (iii), (iv), (v)
or (vi) of Annex A shall not have been satisfied or waived or, as a result of
any statute, rule, regulation, judgment, order or injunction having been
enacted, entered, enforced, promulgated or deemed applicable, pursuant to an
authoritative interpretation by or on behalf of a Governmental Entity, to the
Offer or the Merger, or any other action shall be taken by any Governmental
Entity, which shall not have become final and non-appealable, the conditions
set forth in clause (vii) paragraph (b) of Annex A shall not have been
satisfied or waived and at such time all of the other conditions to the
Purchaser's obligation to consummate the Offer have been satisfied or waived,
the Purchaser shall be obligated to extend the Offer for a period of up to ten
business days, which extension shall be repeated one time further if necessary;
provided, however, that the Purchaser may, in any such event, extend the
expiration date of the Offer beyond such ten day period in its sole discretion.

                           (b)  As soon as practicable on the date
the Offer is commenced, Parent and the Purchaser shall file with the United
States Securities and Exchange Commission (the "SEC") a Tender Offer Statement
on Schedule 14D-1 with respect to the Offer (together with all amendments and
supplements thereto and including the exhibits thereto, the "Schedule 14D-1").
The Schedule 14D-1 will include, as exhibits, the Offer to Purchase and a form
of letter of transmittal and summary advertisement (collectively, together with
any amendments and supplements thereto, the "Offer Documents"). The Offer
Documents will comply in all material respects with the provisions of
applicable federal securities laws and, on the date filed with the SEC and on
the date first published, sent


                                                  3




    
<PAGE>




or given to the Company's stockholders, shall not contain any untrue statement
of a material fact or omit to state any material fact required to be stated
therein or necessary in order to make the statements therein, in light of the
circumstances under which they were made, not misleading, except that no
representation is made by Parent or the Purchaser with respect to information
furnished by the Company to Parent or the Purchaser, in writing, expressly for
inclusion in the Offer Documents. The information supplied by the Company to
Parent or the Purchaser, in writing, expressly for inclusion in the Offer
Documents and by Parent or the Purchaser to the Company, in writing, expressly
for inclusion in the Schedule 14D-9 (as hereinafter defined) will not contain
any untrue statement of a material fact or omit to state any material fact
required to be stated therein or necessary in order to make the statements
therein, in light of the circumstances under which they were made, not
misleading. Each of Parent and the Purchaser will take all steps necessary to
cause the Offer Documents to be filed with the SEC and to be disseminated to
holders of the Shares, in each case as and to the extent required by applicable
federal securities laws. Each of Parent and the Purchaser, on the one hand, and
the Company, on the other hand, will promptly correct any information provided
by it for use in the Offer Documents if and to the extent that it shall have
become false or misleading in any material respect and the Purchaser will take
all steps necessary to cause the Offer Documents as so corrected to be filed
with the SEC and to be disseminated to holders of the Shares, in each case as
and to the extent required by applicable federal securities laws. The Company
and its counsel shall be given the opportunity to review the Schedule 14D-1
before it is filed with the SEC. In addition, Parent and the Purchaser will
provide the Company and its counsel in writing with any comments, whether
written or oral, Parent, the Purchaser or their counsel may receive from time
to time from the SEC or its staff with respect to the Offer Documents promptly
after the receipt of such comments.

                  Section 1.2  Company Actions.

                           (a)  The Company hereby approves of and
consents to the Offer and represents that the Board of Directors, at a meeting
duly called and held, has (i) unanimously (with the abstention of Rafi Yizhar,
Israel


                                                  4




    
<PAGE>




Niv, Dan Maydan and Zvi Lapidot) determined that each of the Agreement, the
Offer and the Merger (as defined in Section 1.4) are fair to and in the best
interests of the stockholders of the Company, (ii) approved this Agreement and
the Stockholder Agreements and the transactions contemplated hereby and
thereby, including the Offer and the Merger (collectively, the "Transactions"),
and such approval constitutes approval of the Offer, this Agreement, the
Stockholders Agreement and the transactions contemplated hereby and thereby,
including the Merger, for purposes of Section 203 of the Delaware General
Corporation Law, as amended (the "DGCL")), such that Section 203 of the DGCL
will not apply to the transactions contemplated by this Agreement or the
Stockholder Agreements, and (iii) resolved to recommend that the stockholders
of the Company accept the Offer, tender their Shares thereunder to the
Purchaser and approve and adopt this Agreement and the Merger; provided, that
such recommendation may be withdrawn, modified or amended if, in the opinion of
the Board of Directors, only after receipt of written advice from outside legal
counsel, failure to withdraw, modify or amend such recommendation could
reasonably be expected to result in the Board of Directors violating its
fiduciary duties to the Company's stockholders under applicable law. The
Company represents that the actions set forth in this Section 1.2(a) and all
other actions it has taken in connection therewith are sufficient to render the
relevant provisions of such Section 203 of the DGCL inapplicable to the Offer,
the Merger and the Stockholders Agreement.

                           (b)  Concurrently with the commencement of
the Offer, the Company shall file with the SEC a Solicitation/Recommendation
Statement on Schedule 14D-9 (together with all amendments and supplements
thereto and including the exhibits thereto, the "Schedule 14D-9") which shall,
subject to the provisions of Section 5.4(b), contain the recommendation
referred to in clause (iii) of Section 1.2(a) hereof. The Schedule 14D-9 will
comply in all material respects with the provisions of applicable federal
securities laws and, on the date filed with the SEC and on the date first
published, sent or given to the Company's stockholders, shall not contain any
untrue statement of a material fact or omit to state any material fact required
to be stated therein or necessary in order to make the statements therein, in
light of the circumstances under which they were made, not misleading,


                                                  5




    
<PAGE>




except that no representation is made by the Company with respect to
information furnished by Parent or the Purchaser for inclusion in the Schedule
14D-9. The Company further agrees to take all steps necessary to cause the
Schedule 14D-9 to be filed with the SEC and to be disseminated to holders of
the Shares, in each case as and to the extent required by applicable federal
securities laws. Each of the Company, on the one hand, and Parent and the
Purchaser, on the other hand, agrees promptly to correct any information
provided by it for use in the Schedule 14D-9 if and to the extent that it shall
have become false and misleading in any material respect and the Company
further agrees to take all steps necessary to cause the Schedule 14D-9 as so
corrected to be filed with the SEC and to be disseminated to holders of the
Shares, in each case as and to the extent required by applicable federal
securities laws. Parent and its counsel shall be given the opportunity to
review the Schedule 14D-9 before it is filed with the SEC. In addition, the
Company agrees to provide Parent, the Purchaser and their counsel with any
comments, whether written or oral, that the Company or its counsel may receive
from time to time from the SEC or its staff with respect to the Schedule 14D-9
promptly after the receipt of such comments or other communications.

                           (c)  In connection with the Offer, the
Company will promptly furnish or cause to be furnished to the Purchaser mailing
labels, security position listings and any available listing or computer file
containing the names and addresses of all recordholders of the Shares as of a
recent date, and shall furnish the Purchaser with such additional information
(including, but not limited to, updated lists of holders of the Shares and
their addresses, mailing labels and lists of security positions) and assistance
as the Purchaser or its agents may reasonably request in communicating the
Offer to the record and beneficial holders of the Shares. Except for such steps
as are necessary to disseminate the Offer Documents, Parent and the Purchaser
shall hold in confidence the information contained in any of such labels and
lists and the additional information referred to in the preceding sentence,
will use such information only in connection with the Offer, and, if this
Agreement is terminated, will upon request of the Company deliver or cause to
be delivered to the Company all copies of such


                                                  6




    
<PAGE>




information then in its possession or the possession of its agents or
representatives.

                  Section 1.3 Directors. Promptly upon the purchase of and
payment for any Shares by Parent or any of its subsidiaries which represents at
least a majority of the outstanding Shares (on a fully diluted basis, as
defined in Section 1.1(a)), Parent shall be entitled to designate such number
of directors, rounded up to the next whole number, on the Board of Directors of
the Company as is equal to the product of the total number of directors on such
Board (giving effect to the directors designated by Parent pursuant to this
sentence) multiplied by the percentage that the number of Shares so accepted
for payment bears to the total number of Shares then outstanding. In
furtherance thereof, the Company shall, upon request of the Purchaser, use its
best reasonable efforts promptly either to increase the size of its Board of
Directors or secure the resignations of such number of its incumbent directors,
or both, as is necessary to enable Parent's designees to be so elected to the
Company's Board, and shall take all actions available to the Company to cause
Parent's designees to be so elected. At such time, the Company shall also cause
persons designated by Parent to constitute at least the same percentage
(rounded up to the next whole number) as is on the Company's Board of Directors
of (i) each committee of the Company's Board of Directors, (ii) each board of
directors (or similar body) of each Subsidiary (as defined in Section 3.1) of
the Company and (iii) each committee (or similar body) of each such board. The
Company shall promptly take all actions required pursuant to Section 14(f) of
the Exchange Act and Rule 14f-1 promulgated thereunder in order to fulfill its
obligations under this Section 1.3(a), including mailing to stockholders the
information required by such Section 14(f) and Rule 14f-1 as is necessary to
enable Parent's designees to be elected to the Company's Board of Directors.
Parent or the Purchaser will supply the Company and be solely responsible for
any information with respect to either of them and their nominees, officers,
directors and affiliates required by such Section 14(f) and Rule 14f-1. The
provisions of this Section 1.3(a) are in addition to and shall not limit any
rights which the Purchaser, Parent or any of their affiliates may have as a
holder or beneficial owner of Shares as a matter of law with respect to the
election of directors or otherwise. In the event


                                                  7




    
<PAGE>




that Parent's designees are elected to the Company's Board of Directors, until
the Effective Time, the Company's Board shall have at least three directors who
are directors on the date hereof (the "Independent Directors"), provided that,
in such event, if the number of Independent Directors shall be reduced below
three for any reason whatsoever, any remaining Independent Directors (or
Independent Director, if there be only one remaining) shall be entitled to
designate persons to fill such vacancies who shall be deemed to be Independent
Directors for purposes of this Agreement or, if no Independent Director then
remains, the other directors shall designate three persons to fill such
vacancies who shall not be stockholders, affiliates or associates of Parent or
the Purchaser and such persons shall be deemed to be Independent Directors for
purposes of this Agreement. Notwithstanding anything in this Agreement to the
contrary, in the event that Parent's designees are elected to the Company's
Board, after the acceptance for payment of Shares pursuant to the Offer and
prior to the Effective Time, the affirmative vote of a majority of the
Independent Directors shall be required to (a) amend or terminate this
Agreement by the Company, (b) exercise or waive any of the Company's rights,
benefits or remedies hereunder, (c) extend the time for performance of Parent's
and the Purchaser's respective obligations hereunder, (d) take any other action
by the Company's Board under or in connection with this Agreement or the
Stockholder Agreements, or (e) approve any other action by the Company which
could adversely affect the interests of the stockholders of the Company (other
than Parent, the Purchaser and their affiliates other than the Company and the
Subsidiaries) with respect to the transactions contemplated hereby.

                  Section 1.4 The Merger. Subject to the terms and conditions
of this Agreement, at the Effective Time, the Company and the Purchaser shall
consummate a merger (the "Merger") pursuant to which (a) the Purchaser shall be
merged with and into the Company and the separate corporate existence of the
Purchaser shall thereupon cease, (b) the Company shall be the successor or
surviving corporation in the Merger (sometimes hereinafter referred to as the
"Surviving Corporation") and shall continue to be governed by the laws of the
State of Delaware, and (c) the separate corporate existence of the Company with
all its rights, privileges, immunities,


                                                  8




    
<PAGE>




powers and franchises shall continue unaffected by the Merger, except as set
forth in this Section 1.4. Pursuant to the Merger, (x) the Certificate of
Incorporation of the Purchaser (the "Certificate of Incorporation"), as in
effect immediately prior to the Effective Time, shall be the certificate of
incorporation of the Surviving Corporation until thereafter amended as provided
by law and such Certificate of Incorporation, and (y) the Bylaws of the
Purchaser (the "By-laws"), as in effect immediately prior to the Effective Time
(as defined in Section 1.5), shall be the By-laws of the Surviving Corporation
until thereafter amended as provided by law, by such Certificate of
Incorporation or by such By-laws. The Merger shall have the effects specified
in the DGCL.

                  Section 1.5 Effective Time. Parent, the Purchaser and the
Company will cause a Certificate of Merger to be executed and filed on the
Closing Date (as defined in Section 1.6) (or on such other date as Parent and
the Company may agree) with the Secretary of State of Delaware (the "Secretary
of State") as provided in the DGCL. The Merger shall become effective on the
date on which the Certificate of Merger is duly filed with the Secretary of
State or such time as is agreed upon by the parties and specified in the
Certificate of Merger, and such time is hereinafter referred to as the
"Effective Time."

                  Section 1.6 Closing. The closing of the Merger (the
"Closing") shall take place at 10:00 a.m. on a date to be specified by the
parties, which shall be no later than the second business day after
satisfaction or waiver of all of the conditions set forth in Article VI hereof
(the "Closing Date"), at the offices of Skadden, Arps, Slate, Meagher & Flom
LLP, 919 Third Avenue, New York, New York 10022, unless another date or place
is agreed to in writing by the parties hereto.

                  Section 1.7 Directors and Officers of the Surviving
Corporation. The directors and officers of the Purchaser at the Effective Time
shall, from and after the Effective Time, be the directors and officers,
respectively, of the Surviving Corporation until their successors shall have
been duly elected or appointed or qualified or until their earlier death,
resignation or removal in accordance with the Certificate of Incorporation and
the By-laws.


                                                  9




    
<PAGE>





                  Section 1.8  Stockholders' Meeting.

                           (a)  If required by applicable law in
order to consummate the Merger, the Company, acting through its Board of
Directors, shall, in accordance with applicable law:

                           (i) duly call, give notice of, convene and hold a
         special meeting of its stockholders (the "Special Meeting") as
         promptly as practicable following the acceptance for payment and
         purchase of Shares by the Purchaser pursuant to the Offer for the
         purpose of considering and taking action upon the approval of the
         Merger and the adoption of this Agreement;

                           (ii) prepare and file with the SEC a preliminary
         proxy or information statement relating to the Merger and this
         Agreement and use its best efforts (x) to obtain and furnish the
         information required to be included by the SEC in the Proxy Statement
         (as hereinafter defined) and, after consultation with Parent, to
         respond promptly to any comments made by the SEC with respect to the
         preliminary proxy or information statement and cause a definitive
         proxy or information statement, including any amendment or supplement
         thereto (the "Proxy Statement") to be mailed to its stockholders,
         provided that no amendment or supplement to the Proxy Statement will
         be made by the Company without consultation with Parent and its
         counsel and (y) to obtain the necessary approvals of the Merger and
         this Agreement by its stockholders; and

                           (iii) subject to the provisions of Section 5.4(b),
         include in the Proxy Statement the recommendation of the Board that
         stockholders of the Company vote in favor of the approval of the
         Merger and the adoption of this Agreement.

                           (b)  Parent shall vote, or cause to
be voted, all of the Shares then owned by it, the Purchaser or any of its other
subsidiaries and affiliates in favor of the approval of the Merger and the
adoption of this Agreement.



                                                 10




    
<PAGE>




                  Section 1.9 Merger Without Meeting of Stockholders.
Notwithstanding Section 1.8 hereof, in the event that Parent, the Purchaser and
any other Subsidiaries of Parent shall acquire in the aggregate at least 90% of
the outstanding shares of each class of capital stock of the Company, pursuant
to the Offer or otherwise, the parties hereto shall, at the request of Parent
and subject to Article VI hereof, take all necessary and appropriate action to
cause the Merger to become effective as soon as practicable after such
acquisition, without a meeting of stockholders of the Company, in accordance
with Section 253 of the DGCL.

                                   ARTICLE II

                            CONVERSION OF SECURITIES

                  Section 2.1 Conversion of Capital Stock. As of the Effective
Time, by virtue of the Merger and without any action on the part of the holders
of any Shares or holders of common stock, par value $.01 per share, of the
Purchaser (the "Purchaser Common Stock"):

                           (a)      the Purchaser Common Stock.  Each
issued and outstanding share of the Purchaser Common Stock shall be converted
into and become one fully paid and nonassessable share of common stock of the
Surviving Corporation.

                           (b)      Cancellation of Treasury Stock and
Parent-Owned Stock. All Shares that are owned by the Company as treasury stock
and any Shares owned by Parent, the Purchaser or any other wholly owned
Subsidiary of Parent shall be cancelled and retired and shall cease to exist
and no consideration shall be delivered in exchange therefor.

                           (c)      Exchange of Shares.  Each issued and
outstanding Share (other than Shares to be cancelled in accordance with Section
2.1(b) and any Shares which are held by stockholders exercising appraisal
rights pursuant to Section 262 of the DGCL ("Dissenting Stockholders")) shall
be converted into the right to receive the Offer Price, payable to the holder
thereof, without interest (the "Merger Consideration"), upon surrender of
the certificate formerly representing such Share in the manner provided in
Section 2.2. All such Shares, when so


                                                 11




    
<PAGE>




converted, shall no longer be outstanding and shall automatically be cancelled
and retired and shall cease to exist, and each holder of a certificate
representing any such Shares shall cease to have any rights with respect
thereto, except the right to receive the Merger Consideration therefor upon the
surrender of such certificate in accordance with Section 2.2, without interest,
or the right, if any, to receive payment from the Surviving Corporation of the
"fair value" of such Shares as determined in accordance with Section 262 of the
DGCL.

                  Section 2.2             Exchange of Certificates.

                           (a)      Paying Agent.  Parent shall designate
a bank or trust company reasonably acceptable to the Company to act as agent
for the holders of the Shares in connection with the Merger (the "Paying
Agent") to receive in trust the funds to which holders of the Shares
shall become entitled pursuant to Section 2.1(c). Such funds shall be invested
by the Paying Agent as directed by Parent or the Surviving Corporation.

                           (b)      Exchange Procedures.  As soon as rea-
sonably practicable after the Effective Time, the Paying Agent shall mail to
each holder of record of a certificate or certificates, which immediately prior
to the Effective Time represented outstanding Shares (the "Certificates"),
whose Shares were converted pursuant to Section 2.1 into the right to
receive the Merger Consideration (i) a letter of transmittal (which shall
specify that delivery shall be effected, and risk of loss and title to the
Certificates shall pass, only upon delivery of the Certificates to the Paying
Agent and shall be in such form and have such other provisions as Parent and
the Company may reasonably specify) and (ii) instructions for use in effecting
the surrender of the Certificates in exchange for payment of the Merger
Consideration. Upon surrender of a Certificate for cancellation to the Paying
Agent or to such other agent or agents as may be appointed by Parent, together
with such letter of transmittal, duly executed, the holder of such Certificate
shall be entitled to receive in exchange therefor the Merger Consideration for
each Share formerly represented by such Certificate and the Certificate so
surrendered shall forthwith be cancelled. If payment of the Merger
Consideration is to be made to a person other than the person in whose name the
surrendered Certificate is registered,


                                                 12




    
<PAGE>




it shall be a condition of payment that the Certificate so surrendered shall be
properly endorsed or shall be otherwise in proper form for transfer and that
the person requesting such payment shall have paid any transfer and other taxes
required by reason of the payment of the Merger Consideration to a person other
than the registered holder of the Certificate surrendered or shall have
established to the satisfaction of the Surviving Corporation that such tax
either has been paid or is not applicable. Until surrendered as contemplated by
this Section 2.2, each Certificate shall be deemed at any time after the
Effective Time to represent only the right to receive the Merger Consideration
in cash as contemplated by this Section 2.2.

                           (c)      Transfer Books; No Further Ownership
Rights in the Shares. At the Effective Time, the stock transfer books of the
Company shall be closed and thereafter there shall be no further registration
of transfers of the Shares on the records of the Company. From and after the
Effective Time, the holders of Certificates evidencing ownership of the Shares
outstanding immediately prior to the Effective Time shall cease to have any
rights with respect to such Shares, except as otherwise provided for herein or
by applicable law. If, after the Effective Time, Certificates are presented to
the Surviving Corporation for any reason, they shall be cancelled and exchanged
as provided in this Article II.

                           (d)      Termination of Fund; No Liability.
At any time following twelve months after the Effective Time, the Surviving
Corporation shall be entitled to require the Paying Agent to deliver to it any
funds (including any interest received with respect thereto) which had been
made available to the Paying Agent and which have not been disbursed to holders
of Certificates, and thereafter such holders shall be entitled to look to the
Surviving Corporation (subject to abandoned property, escheat or other similar
laws) only as general creditors thereof with respect to the Merger
Consideration payable upon due surrender of their Certificates, without any
interest thereon. Notwithstanding the foregoing, neither the Surviving
Corporation nor the Paying Agent shall be liable to any holder of a Certificate
for Merger Consideration delivered to a public official pursuant to any
applicable abandoned property, escheat or similar law.



                                                 13




    
<PAGE>




                  Section 2.3            Dissenters' Rights.   If any Dissenting
Stockholder shall be entitled to be paid the "fair value" of such holder's
Shares, as provided in Section 262 of the DGCL, the Company shall give Parent
notice thereof and Parent shall have the right to participate in all
negotiations and proceedings with respect to any such demands. Neither the
Company nor the Surviving Corporation shall, except with the prior written
consent of Parent, voluntarily make any payment with respect to, or settle or
offer to settle, any such demand for payment. If any Dissenting Stockholder
shall fail to perfect or shall have effectively withdrawn or lost the right
to dissent, the Shares held by such Dissenting Stockholder shall thereupon be
treated as though such Shares had been converted into the Merger Consideration
pursuant to Section 2.1.

                  Section 2.4             Company Plans.

                           (a)  Parent and the Company shall, effec-
tive as of the Effective Time, cause each outstanding unvested employee stock
option to purchase Shares (an "Unvested Company Option") granted under the
Company's 1993 Employee Stock Option Plan and under prior plans included in the
representation in Section 3.2(a)(iv) (collectively, the "Option Plan") to be
assumed by Parent and converted into an option (or a new substitute option
shall be granted) (a "Parent Option") to purchase shares of common stock, par
value $.01 per share, of Parent ("Parent Common Stock") issued under and
pursuant to the terms and conditions of Parent's 1995 Equity Incentive Plan, as
amended, or any other stock option plan of Parent adopted specifically for
employees of the Company in order to issue Parent Options as provided in this
Section 2.4(a) (the "Parent Option Plan"). The issuance of shares of Parent
Common Stock under the Parent Options shall be registered under the Securities
Act pursuant to a Registration Statement of Parent on Form S-8. The parties
agree that (i) the number of shares of Parent Common Stock subject to such
Parent Option will be determined by multiplying the number of Shares subject to
the Unvested Company Option to be cancelled by the Option Exchange Ratio (as
hereinafter defined), rounding any fractional share up to the nearest whole
share, and (ii) the exercise price per share of such Parent Option will be
determined by dividing the exercise price per share under the Company Option in
effect immediately prior to the Effec-


                                                 14




    
<PAGE>




tive Time by the Option Exchange Ratio, and rounding the exercise price thus
determined up to the nearest whole cent, subject to appropriate adjustments for
stock splits and other similar events. Except as provided above, the converted
or substituted Parent Options shall be subject to the same terms and conditions
(including, without limitation, expiration date, vesting and exercise
provisions) as were applicable to the Unvested Company Options immediately
prior to the Effective Time. The Company, the trustee under the Option Plan
that holds Shares and Company options on behalf of employees of the Company and
its Subsidiaries (the "Trustee") and Parent shall take all necessary action to
facilitate and effect the substitution described in this Section 2.4(a). Based
upon and subject to the accuracy of the Company's representation and warranty
set forth in Section 3.9(h), Parent will apply to qualify such Parent Options
issued to employees of the Company who are residents of Israel under Section
102 or another similar provision of the Israeli Income Tax Ordinance and will
obtain confirmation from the Israeli tax authorities that tacking shall be
allowed with respect to the two-year holding period required under Section 102
for such periods in which the Unvested Company Options were held before the
Effective Time; provided, that Parent shall not be required to agree to any
change in any of the economic terms of such options as established by this
Section 2.4(a) (including, without limitation, identity of employer, number of
shares, exercise price and vesting provisions) in order to obtain such
qualification. The issuance of Parent Options as provided herein shall be
subject to, and conditioned upon, obtaining an exemption by the Israeli
Securities Authority from the registration and prospectus delivery requirements
of the Israeli Securities laws. In the event such exemption is not obtained,
unless Parent elects to comply with the requirements of the Israeli Securities
laws, all Unvested Company Options held by the 35 persons holding the greatest
aggregate amount of Unvested Company Options shall be treated as provided in
this Section 2.4(a) and exchanged for Parent Options and the remaining Unvested
Company Options shall be treated in the same manner as the Vested Options
pursuant to Section 2.4(b). For purposes of this Agreement, the "Option
Exchange Ratio" shall be (x) the Offer Price divided by (y) the average of the
closing prices of the Parent Common Stock on the Nasdaq National Market System
during


                                                 15




    
<PAGE>




the ten trading days preceding the fifth trading day prior to the Closing Date.

                           (b)  At the Closing, immediately before
the Effective Time, each outstanding fully vested employee stock option to
purchase Shares (a "Vested Company Option", and together with an Unvested
Company Option, a "Company Option") granted under the Option Plan, except for
the Vested Company Options set forth in Section 2.4(b) of the Company
Disclosure Schedule (as defined in Article III) which shall be treated in the
same manner as the Unvested Company Options pursuant to Section 2.4(a), shall
be surrendered to the Company and shall be forthwith cancelled and the Company
or the Surviving Corporation shall pay to each holder of a Vested Company
Option, by check, an amount equal to (i) the product of the number of the
Shares which are issuable upon exercise of such Vested Company Option,
multiplied by the Offer Price, less (ii) the aggregate exercise price of such
Vested Company Option; provided that the foregoing cancellation and payment
shall be subject to the obtaining of any necessary consents of holders of
Vested Company Options and that any such payment may be withheld in respect of
any Vested Company Option until any necessary consents or releases are
obtained. From and after the Effective Time, each outstanding Vested Company
Option held by a holder who has failed to so consent shall be treated as
provided in Section 2.4(a). The Company and the Trustee shall take all
necessary action to facilitate the surrender, cancellation and payment in
consideration for the Vested Company Options described in this Section 2.4(b).
The Company or the Trustee shall withhold all income or other taxes as required
under applicable law prior to distribution of the cash amount received under
this Section 2.4(b) to the holders of Vested Company Options.

                           (c)      Except as may be otherwise agreed to
by Parent or the Purchaser and the Company, the Option Plan and the Company's
1995 Employee Stock Purchase Plan (the "1995 Plan") shall terminate as of the
Effective Time and the provisions in any other plan, program or arrangement
providing for the issuance or grant of any other interest in respect of the
capital stock of the Company or any of its Subsidiaries shall be deleted as of
the Effective Time. Each participant in the 1995 Plan shall be entitled to
receive, pursuant to the 1995 Plan,


                                                 16




    
<PAGE>




a number of Shares based upon such participant's contributions in accordance
with the provisions of the 1995 Plan for the Purchase Period (as defined in the
1995 Plan) ending December 31, 1996, or such part of such Purchase Period as
has been completed at the Effective Time, and at the applicable purchase price
per Share determined in accordance with the provisions of the 1995 Plan for
such Purchase Period, provided that no such participant shall be entitled to
increase his or her rate of contribution after the date hereof, and the Shares
so purchased shall immediately be exchanged for cash pursuant to the Merger.
After the expiration of the Purchase Period ending December 31, 1996, no such
purchaser shall have any further right under the 1995 Plan to acquire any
equity securities of the Company, the Surviving Corporation or any subsidiary
thereof.

                           (d)      For purposes of Sections 2.4(a) and
(b), any partially vested Company Option shall be treated as two separate
Company Options, one consisting of the vested portion and the other consisting
of the unvested portion of such Company Option.

                           (e)      Holders of Company Options and par-
ticipants in the 1995 Plan shall be beneficiaries of the
agreements in this Section 2.4.


                                  ARTICLE III

                 REPRESENTATIONS AND WARRANTIES OF THE COMPANY

                  The Company represents and warrants to Parent and the
Purchaser that all of the statements contained in this Article III are true and
correct as of the date of this Agreement (or, if made as of a specified date,
as of such date), and will be true and correct in all material respects as of
the Closing Date as though made on the Closing Date, except as set forth in the
schedule attached to this Agreement setting forth exceptions to the Company's
representations and warranties set forth herein (the "Company Disclosure
Schedule"). The Company Disclosure Schedule will be arranged in sections
corresponding to the sections of this Agreement to be modified by such
disclosure schedule, provided that any disclosure made in any section of the
Company Disclosure Schedule shall be deemed incorporated in all other sections
thereof.


                                                 17




    
<PAGE>





                  Section 3.1 Organization. Each of the Company and its
Subsidiaries is a corporation duly organized, validly existing and in good
standing under the laws of the jurisdiction of its incorporation or
organization and has all requisite corporate power and authority and all
necessary governmental approvals to own, lease and operate its properties and
to carry on its business as now being conducted, except where the failure to be
so organized, existing and in good standing or to have such power, authority,
and governmental approvals would not have a material adverse effect on the
Company and its Subsidiaries, taken as a whole. As used in this Agreement, the
term "Subsidiary" shall mean all corporations or other entities in which the
Company or the Parent, as the case may be, owns a majority of the issued and
outstanding capital stock or similar interests. As used in this Agreement, any
reference to any event, change or effect being material or having a material
adverse effect on or with respect to any entity (or group of entities taken as
a whole) means such event, change or effect is materially adverse to (i) the
consolidated financial condition, businesses, prospects or results of
operations of such entity as a whole (or, if used with respect thereto, of such
group of entities taken as a whole) or (ii) the ability of such entity (or
group) to consummate the transactions contemplated hereby. The Company and each
of its Subsidiaries is duly qualified or licensed to do business and in good
standing in each jurisdiction in which the property owned, leased or operated
by it or the nature of the business conducted by it makes such qualification or
licensing necessary, except where the failure to be so duly qualified or
licensed and in good standing would not individually or in the aggregate have a
material adverse effect on the Company and its Subsidiaries, taken as a whole.
Except as set forth in Section 3.1 of the Company Disclosure Schedule, the
Company does not own (i) any equity interest in any corporation or other entity
or (ii) marketable securities where the Company's equity interest in any entity
exceeds five percent of the outstanding equity of such entity on the date
hereof.

                  Section 3.2 Capitalization. (a) The authorized capital stock
of the Company consists of 12,500,000 Shares and 1,000,000 shares of preferred
stock, par value $.01 per share (the "Preferred Stock"). As of the date hereof,
(i) 8,743,583 Shares are issued and outstanding, (ii) no Shares are issued and
held in the treasury of the


                                                 18




    
<PAGE>




Company, (iii) no shares of Preferred Stock are issued and outstanding, (iv)
351,050 Shares are reserved for issuance upon exercise of Vested Company
Options and 859,533 Shares are reserved for issuance upon exercise of Unvested
Company Options, in each case under the Option Plan, and (vi) 298,278 Shares
remain reserved for issuance under the 1995 Plan, of which up to 40,000 Shares
will be issued in respect of outstanding employee contributions for the
Purchase Period ending December 31, 1996. All the outstanding shares of the
Company's capital stock are, and all Shares which may be issued pursuant to the
exercise of outstanding Company Options will be, when issued in accordance with
the respective terms thereof, duly authorized, validly issued, fully paid and
non-assessable. There are no bonds, debentures, notes or other indebtedness
having general voting rights (or convertible into securities having such
rights) ("Voting Debt") of the Company or any of its Subsidiaries issued and
outstanding. Except as set forth above and except for the transactions
contemplated by this Agreement, as of the date hereof, (i) there are no shares
of capital stock of the Company authorized, issued or outstanding (ii) there
are no existing options, warrants, calls, pre-emptive rights, subscriptions or
other rights, agreements, arrangements or commitments of any character,
relating to the issued or unissued capital stock of the Company or any of its
Subsidiaries, obligating the Company or any of its Subsidiaries to issue,
transfer or sell or cause to be issued, transferred or sold any shares of
capital stock or Voting Debt of, or other equity interest in, the Company or
any of its Subsidiaries or securities convertible into or exchangeable for such
shares or equity interests, or obligating the Company or any of its
Subsidiaries to grant, extend or enter into any such option, warrant, call,
subscription or other right, agreement, arrangement or commitment and (iii)
except as set forth in Section 3.2(a) of the Company Disclosure Schedule, there
are no outstanding contractual obligations of the Company or any of its
Subsidiaries to repurchase, redeem or otherwise acquire any Shares, or the
capital stock of the Company, or any Subsidiary or affiliate of the Company or
to provide funds to make any investment (in the form of a loan, capital
contribution or otherwise) in any Subsidiary or any other entity.

                           (b)  All of the outstanding shares of
capital stock of each of the Subsidiaries are beneficial-


                                                 19




    
<PAGE>




ly owned by the Company, directly or indirectly, and all such shares have been
validly issued and are fully paid and nonassessable and are owned by either the
Company or one of its Subsidiaries free and clear of all liens, charges, claims
or encumbrances ("Encumbrances").

                           (c)  There are no voting trusts or other
agreements or understandings to which the Company or any of its Subsidiaries is
a party with respect to the voting of the capital stock of the Company or any
of the Subsidiaries.

                  Section 3.3 Authorization; Validity of Agreement; Company
Action. The Company has full corporate power and authority to execute and
deliver this Agreement and to consummate the transactions contemplated hereby.
The execution, delivery and performance by the Company of this Agreement, and
the consummation by it of the transactions contemplated hereby, have been duly
authorized by its Board of Directors and, except for obtaining the approval of
its stockholders as contemplated by Section 1.8 hereof, no other corporate
action on the part of the Company is necessary to authorize the execution and
delivery by the Company of this Agreement and the consummation by it of the
transactions contemplated hereby. This Agreement has been duly executed and
delivered by the Company and, assuming due and valid authorization, execution
and delivery hereof by Parent and the Purchaser, is a valid and binding
obligation of the Company enforceable against the Company in accordance with
its terms.

                  Section 3.4 Consents and Approvals; No Violations. Except for
the filings set forth in Section 3.4 of the Company Disclosure Schedule and the
filings, permits, authorizations, consents and approvals as may be required
under, and other applicable requirements of, the Exchange Act, the
Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended (the "HSR
Act"), state securities or blue sky laws, and the DGCL, none of the execution,
delivery or performance of this Agreement by the Company, the consummation by
the Company of the transactions contemplated hereby or compliance by the
Company with any of the provisions hereof will (i) conflict with or result in
any breach of any provision of the Certificate of Incorporation, the By-laws or
similar organizational documents of the Company or of any of its


                                                 20




    
<PAGE>




Subsidiaries, (ii) require any filing with, or permit, authorization, consent
or approval of, any court, arbitral tribunal, administrative agency or
commission or other governmental or other regulatory authority or agency (a
"Governmental Entity"), (iii) result in a violation or breach of, or constitute
(with or without due notice or lapse of time or both) a default (or give rise
to any right of termination, amendment, cancellation or acceleration) under,
any of the terms, conditions or provisions of any note, bond, mortgage,
indenture, lease, license, contract, agreement or other instrument or
obligation to which the Company or any of its Subsidiaries is a party or by
which any of them or any of their properties or assets may be bound (the
"Company Agreements") or (iv) violate any order, writ, injunction, decree,
statute, rule or regulation applicable to the Company, any of its Subsidiaries
or any of their properties or assets, excluding from the foregoing clauses
(ii), (iii) and (iv) such violations, breaches or defaults which would not,
individually or in the aggregate, have a material adverse effect on the Company
and its Subsidiaries, taken as a whole. Section 3.4 of the Company Disclosure
Schedule sets forth a list of all third party consents and approvals required
to be obtained in connection with this Agreement under the Company Agreements
prior to the consummation of the transactions contemplated by this Agreement.

                  Section 3.5 SEC Reports and Financial Statements. The Company
has filed with the SEC, and has heretofore made available to Parent, true and
complete copies of, all forms, reports, schedules, statements and other
documents required to be filed by it under the Exchange Act or the Securities
Act of 1933, as amended (the "Securities Act") (as such documents have been
amended since the time of their filing, collectively, the "Company SEC
Documents"). As of their respective dates or, if amended, as of the date of the
last such amendment, the Company SEC Documents, including, without limitation,
any financial statements or schedules included therein (a) did not contain any
untrue statement of a material fact or omit to state a material fact required
to be stated therein or necessary in order to make the statements therein, in
light of the circumstances under which they were made, not misleading and (b)
complied in all material respects with the applicable requirements of the
Exchange Act and the Securities Act, as the case may


                                                 21




    
<PAGE>




be, and the applicable rules and regulations of the SEC thereunder. None of the
Company's Subsidiaries is required to file any forms, reports or other
documents with the SEC. The financial statements of the Company included in the
Company SEC Documents (the "Financial Statements") have been prepared from, and
are in accordance with, the books and records of the Company and its
consolidated Subsidiaries, comply in all material respects with applicable
accounting requirements and with the published rules and regulations of the SEC
with respect thereto, have been prepared in accordance with United States
generally accepted accounting principles ("GAAP") applied on a consistent basis
during the periods involved (except as may be indicated in the notes thereto)
and fairly present the consolidated financial position and the consolidated
results of operations and cash flows (and changes in financial position, if
any) of the Company and its consolidated Subsidiaries as of the times and for
the periods referred to therein. The financial statements of Opal Technologies
Ltd. and of ICT Integrated Circuit Testing GmbH have been prepared from, and
are in accordance with, their respective books and records, comply in all
material respects with applicable accounting requirements, have been prepared
in accordance with Israeli and German generally accepted accounting principals,
respectively, applied on a consistent basis during the periods involved (except
as may be indicated in the notes thereto) and fairly present the financial
position, results of operations and cash flows (and changes in financial
position, if any) of Opal Technologies Ltd. and ICT Integrated Circuit Testing
GmbH as of the times and for the periods referred to therein.

                  Section 3.6 Absence of Certain Changes. Except as disclosed
in Section 3.6 of the Company Disclosure Schedule, since December 31, 1995, the
Company and its Subsidiaries have conducted their respective businesses only in
the ordinary and usual course and (i) there has not occurred any events or
changes (including the incurrence of any liabilities of any nature, whether or
not accrued, contingent or otherwise) having or reasonably likely to have,
individually or in the aggregate, a material adverse effect on the Company and
its Subsidiaries, taken as a whole, other than such events or changes which
relate to general conditions in the economy or in the Company's industry or
arise solely from the Company's execution and delivery of this Agreement, and


                                                 22




    
<PAGE>




(ii) the Company has not taken any action which would have been prohibited
under Section 5.1 hereof.

                  Section 3.7 No Undisclosed Liabilities. Except (a) as
disclosed in the Financial Statements and (b) for liabilities and obligations
(x) incurred in the ordinary course of business and consistent with past
practice (y) pursuant to the terms of this Agreement or (z) as set forth in
Section 3.7 of the Company Disclosure Schedule, since December 31, 1995,
neither the Company nor any of its Subsidiaries has incurred any liabilities or
obligations of any nature, whether or not accrued, contingent or otherwise,
that have, or would be reasonably likely to have, a material adverse effect on
the Company and its Subsidiaries, taken as a whole, or would be required by
GAAP to be reflected on a consolidated balance sheet of the Company and its
Subsidiaries (including the notes thereto).

                  Section 3.8 Litigation. Except as set forth in Section 3.8 of
the Company Disclosure Schedule, as of the date hereof, there are no suits,
claims, actions, proceedings, including, without limitation, arbitration
proceedings or alternative dispute resolution proceedings, or investigations
pending or, to the Company's knowledge, threatened against the Company or any
of its Subsidiaries before any Governmental Entity. Except as disclosed in
Section 3.8 of the Company Disclosure Schedule, neither the Company nor any of
its Subsidiaries is subject to any outstanding order, writ, injunction or
decree.

                  Section 3.9             Employee Benefit Plans; ERISA.

                           (a)      Section 3.9(a) of the Company Disclo-
sure Schedule sets forth a true and complete list (or, in the case of an
unwritten plan, a description) of all material employee benefit plans,
arrangements, contracts or agreements (including employment agreements,
severance agreements and managers' insurance plans) of any type, statutory or
otherwise, (including but not limited to plans described in Section 3(3) of the
Employee Retirement Income Security Act of 1974, as amended ("ERISA")),
maintained by the Company, any of its Subsidiaries or any trade or business,
whether or not incorporated (an "ERISA Affiliate"), which together with the
Company would be deemed a "single employer" within the meaning of Section


                                                 23




    
<PAGE>




414(b), 414(c) or 414(m) of the Internal Revenue Code of 1986, as amended (the
"Code"), or the regulations, issued under Section 414(o) of the Code ("Benefit
Plans"). Except as disclosed in Section 3.9 of the Company Disclosure Schedule,
neither the Company nor any ERISA Affiliate has any formal plan or commitment,
whether legally binding or not, to create any additional Benefit Plan or modify
or change any existing Benefit Plan that would affect any employee or
terminated employee of the Company or any of its Subsidiaries.

                           (b)      With respect to each Benefit Plan:
(i) if intended to qualify under Section 401(a) of the Code, such plan so
qualifies, and its trust is exempt from taxation under Section 501(a) of the
Code, there have been no amendments to any such Benefit Plan which are not the
subject of a favorable determination letter, and no condition exists that would
reasonably be expected to affect such qualification; (ii) such plan has been
administered in all material respects in accordance with its terms and
applicable statutes, orders or governmental rules or regulations, including but
not limited to ERISA and the Code, no notice has been issued by any
Governmental Entity questioning or challenging such compliance, and no
condition exists that would be expected to affect such compliance; (iii) no
breaches of fiduciary duty have occurred which might reasonably be expected to
give rise to material liability on the part of the Company; (iv) no disputes
are pending, or, to the Company's knowledge, threatened that might reasonably
be expected to give rise to material liability on the part of the Company; (v)
no prohibited transaction (within the meaning of Section 406 of ERISA) has
occurred that would give rise to material liability on the part of the Company
or any ERISA Affiliate; and (vi) all contributions and premiums due as of the
date hereof in respect of any Benefit Plan (taking into account any extensions
for such contributions and premiums) have been made in full or accrued on the
Company's balance sheet.

                           (c)      Except as set forth in Section 3.9(c)
of the Company Disclosure Schedule, neither the Company nor any ERISA Affiliate
(i) has incurred an accumulated funding deficiency, as defined in the Code and
ERISA, or (ii) has any material liability under Title IV of ERISA with respect
to any employee benefit plan that is subject to Title IV of ERISA.


                                                 24




    
<PAGE>





                           (d)      With respect to each Benefit Plan
that provides employee benefits other than pension benefits (including but not
limited to each Benefit Plan that is a "welfare plan" (as defined in section
3(1) of ERISA)), except as disclosed in Section 3.9(d) of the Company
Disclosure Schedule, no such plan provides medi-cal or death benefits with
respect to current or former employees of the Company or any of its
Subsidiaries beyond their termination of employment, other than as required by
law.

                           (e)      Except as set forth in Section 3.9(e)
of the Company Disclosure Schedule, neither the execution of this Agreement nor
the consummation of the transactions contemplated hereby will (i) entitle any
individual to severance pay or accelerate the time of payment or vesting, or
increase the amount, of compensation or benefits due to any individual, (ii)
constitute or result in a prohibited transaction under Section 4975 of the Code
or Section 406 of ERISA or (iii) subject the Company, any of its Subsidiaries,
any ERISA Affiliate, any of the Benefit Plans, any related trust, any trustee
or administrator of any thereof, or any party dealing with the Benefit Plans or
any such trust to either a civil penalty assessed pursuant to Section 409 or
502(i) of ERISA or a tax imposed pursuant to Section 4975 of the Code.

                           (f)      There is no Benefit Plan that is a
"multiemployer plan," as such term is defined in Section 3(37) of ERISA.

                           (g)      With respect to each Benefit Plan,
the Company has previously delivered to Parent or its representatives accurate
and complete copies of all plan documents, summary plan descriptions, summary
of material modifications, trust agreements and other related agreements,
including all amendments to the foregoing; the most recent annual report; the
annual and periodic accounting of plan assets in respect of the two most recent
plan years; the most recent determination letter received from the United
States Internal Revenue Service (the "Service"); and the actuarial valuation,
to the extent any of the foregoing may be applicable to a particular Benefit
Plan, in respect of the two most recent plan years.



                                                 25




    
<PAGE>




                           (h)  The Option Plan is qualified under
Section 102 of the Israeli Income Tax Ordinance and all steps necessary to
maintain such qualification have been taken.

                  Section 3.10            Tax Matters; Government Benefits.

                           (a)  The Company and each of its Subsid-
iaries have filed all Tax Returns (as hereinafter defined) that are required to
be filed and have paid or caused to be paid all Taxes (as hereinafter defined)
that are either shown on such Tax Returns as due and payable or otherwise due
or claimed to be due by any taxing authority, in each case excluding only such
Tax Returns or Taxes as to which any failure to file or pay does not have a
material adverse effect on the Company and its Subsidiaries taken as a whole.
All such Tax Returns are correct and complete in all material respects and
accurately reflect all liability for Taxes for the periods covered thereby. All
Taxes owed and due by the Company and each of its Subsidiaries for results of
operations through December 31, 1995 (whether or not shown on any Tax Return)
have been paid or have been adequately reflected on the Company's balance sheet
as of December 31, 1995 included in the Financial Statements (the "Balance
Sheet"). Since December 31, 1995, the Company has not incurred liability for
any Taxes other than in the ordinary course of business. Neither the Company
nor any of its Subsidiaries has received written notice of any claim made by an
authority in a jurisdiction where neither the Company nor any of its
Subsidiaries file Tax Returns, that the Company is or may be subject to
taxation by that jurisdiction.

                           (b)      Neither the Company nor any of its
Subsidiaries has violated any applicable law of any jurisdiction relating to
the payment and withholding of Taxes, including, without limitation, (x)
withholding of Taxes pursuant to Sections 1441 and 1442 of the Code or similar
provisions under non-U.S. law and (y) withholding of Taxes in respect of
amounts paid or owing to any employee, creditor, independent contractor, or
other third party, excluding unintended violations which do not have a material
adverse effect on the Company and its Subsidiaries taken as a whole. The
Company and each of its Subsidiaries have, in the manner prescribed by law,


                                                 26




    
<PAGE>




withheld and paid when due all Taxes required to have been withheld and paid
under all applicable laws.

                           (c)      There are no Encumbrances upon the
shares of capital stock of any of the Company's Subsidiaries or any of the
assets or properties of the Company or any of its Subsidiaries or, to the
Company's knowledge, on any of the Shares that arose in connection with any
failure (or alleged failure) to pay any Tax when due.

                           (d)      Neither the Company nor any of its
Subsidiaries has waived any statute of limitations in any jurisdiction in
respect of Taxes or Tax Returns or agreed to any extension of time with respect
to a Tax assessment or deficiency.

                           (e)      No federal, state, local or foreign
audits, examinations or other administrative proceedings have been commenced
or, to the Company's knowledge, are pending with regard to any Taxes or Tax
Returns of the Company or of any of its Subsidiaries. No written notification
has been received by the Company or by any of its Subsidiaries that such an
audit, examination or other proceeding is pending or threatened with respect to
any Taxes due from or with respect to or attributable to the Company or any of
its Subsidiaries or any Tax Return filed by or with respect to the Company or
any of its Subsidiaries. To the Company's knowledge, there is no dispute or
claim concerning any Tax liability of the Company or any of its Subsidiaries
either claimed or raised by any taxing authority in writing.

                           (f)      During their most recent five taxable
years respectively, neither the Company nor any of its Subsidiaries has made a
change in tax accounting methods, received a ruling from any taxing authority
or signed an agreement with any taxing authority which could have a material
adverse effect on the Company or any of its Subsidiaries. Neither the Company
nor any of its Subsidiaries is required to include in income any adjustment
pursuant to Section 481(a) of the Code or any similar provision of foreign,
state or local law, by reason of a voluntary change in tax accounting method
(nor has any taxing authority proposed in writing any such adjustment or change
of accounting method).



                                                 27




    
<PAGE>




                           (g)      Neither the Company nor any of its
Subsidiaries is a party to, is bound by or has any obligation under any Tax
sharing agreement, Tax indemnification agreement or similar contract or
arrangement (other than contracts or arrangements among the Company and its
Subsidiaries). Neither the Company nor any of its Subsidiaries is aware of any
potential liability or obligation to any person as a result of, or pursuant to,
any such agreement, contract or arrangement. Neither the Company nor any of its
Subsidiaries has any liability for Taxes of another person by contract or
otherwise.

                           (h)  No power of attorney with respect to
any matter relating to Taxes or Tax Returns has been granted by or with respect
to the Company or any of its Subsidiaries.

                           (i)      Neither the Company nor any of its
Subsidiaries is a party to any agreement, plan, contract or arrangement that
could result, separately or in the aggregate, in the payment of any "excess
parachute payments" within the meaning of Section 280G of the Code.

                           (j)      During the most recent five taxable
years of the Company and of each of its Subsidiaries, no closing agreement
pursuant to Section 7121 of the Code (or any predecessor provision, or any
similar provision of any state, local or foreign law) has been entered into by
or with respect to the Company or any of its Subsidiaries.

                           (k)      Neither the Company nor any of its
Subsidiaries has filed a consent pursuant to Section 341(f) of the Code (or any
predecessor provision) concerning collapsible corporations, or agreed to have
Section 341(f)(2) of the Code apply to any disposition of a "subsection (f)
asset" (as such term is defined in Section 341(f)(4) of the Code) owned by the
Company or any of its Subsidiaries.

                           (l)      The Company has never been a United
States real property holding corporation within the meaning of Section
897(c)(2) of the Code during the applicable period specified in Section
897(c)(1)(A)(ii) of the Code. The Company has never been a member of an
Affiliated Group within the meaning of Section 1504 of the Code. None of the
Subsidiaries of the Company is a


                                                 28




    
<PAGE>




foreign personal holding company within the meaning of Section 552 of the Code
or a passive foreign investment company within the meaning of Section 1296 of
the Code.

                           (m)      No taxing authority is asserting or
threatening to assert a claim against the Company or any of its Subsidiaries
under or as a result of Section 482 of the Code or any similar provision of
state, local or foreign law.

                           (n)      Section 3.10(n) of the Company Dis-
closure Schedule lists all United States federal, state, local, and foreign Tax
Returns in respect of which an audit is in progress or is, to the Company's
knowledge, pending, which was filed by, on behalf of or with respect to the
Company and its Subsidiaries. The Company has delivered to Parent complete and
accurate copies of each of: (A) all audit, examination and similar reports and
all letter rulings and technical advice memoranda relating to United States
federal, state, local, and foreign Taxes due from or with respect to the
Company and its Subsidiaries; (B) all United States federal, state and local,
and foreign Tax Returns, Tax examination reports and similar documents filed by
the Company and its Subsidiaries; and (C) all closing agreements entered into
by the Company and its Subsidiaries with any taxing authority and all
statements of Tax deficiencies assessed against or agreed to by the Company and
its Subsidiaries. The Company will deliver to the Purchaser all materials with
respect to the foregoing for all matters arising after the date hereof.

                           (o)      Section 3.10(o) of the Company Disc-
losure Schedule lists each tax incentive, other than incentives generally
available by operation of law without application or governmental action, given
to the Company or any of its Subsidiaries under the laws of the State of
Israel, including but not limited to tax benefits granted under the Law for the
Encouragement of Capital Investments, 1959, the period for which such tax
incentive applies, and the nature of such tax incentive. The Company and each
of its Subsidiaries have complied with all requirements of Israeli law to be
entitled to claim each such tax incentive. Subject to the receipt of the
approvals listed in Section 3.4 of the Company Disclosure Schedule, the
consummation of the transactions contemplated hereby will not adversely affect
the ability


                                                 29




    
<PAGE>




of the Company or any of its Subsidiaries to claim the benefit of any tax
incentive for the remaining duration of the incentive or require any recapture
of any previously claimed incentive, and, except as set forth in Section
3.10(o) of the Company Disclosure Schedule, no consent or approval of any
Governmental Entity is required in order to preserve the entitlement of the
Company to any such incentive and, to the Company's knowledge, there is no
intention to change the terms of such tax incentives.

                           (p)      Section 3.10(p) of the Company Dis-
closure Schedule lists with respect to each grant that the Company or any of
its Subsidiaries received or is entitled pursuant to outstanding grant awards
to receive from the Office of the Chief Scientist in the Israeli Ministry of
Industry and Trade (the "Chief Scientist"), the German Minister of Research and
Technology and any other similar organization, the following information: (A)
the total amount of the grant received by the Company or any of its
Subsidiaries and the amount available for future use by the Company or any of
its Subsidiaries; (B) the time period in which the Company or any of its
Subsidiaries received, or will be entitled to receive, each grant; (C) a
general description of the research and development program for which such
grant was approved; (D) the royalty repayment schedule applicable to such grant
and the total repayment due; (E) the type of revenues from which royalty
payments should be made; and (F) the total amount of royalties paid as of a
recent date and the total royalty obligations due as of such date.

                           (q)      The Company and each of its Subsid-
iaries have complied in all material respects with all applicable laws and
regulations, agreements, letters of commitments and any other requirements with
respect to the terms and conditions of each of the grants listed in Section
3.10(p) of the Company Disclosure Schedule and no claim was made by the Chief
Scientist or any other person with respect to compliance by the Company or any
of its Subsidiaries with such terms and conditions or for any repayment in
excess of the amounts specified in Section 3.10(p) of the Company Disclosure
Schedule and, to the Company's knowledge, there is no threatened or possible
claim for any breach of such terms and conditions or any intention to change
such terms and conditions.



                                                 30




    
<PAGE>




                           (r)      As used in this Agreement, the fol-
lowing terms shall have the following meanings:

                           (i) "Tax" or "Taxes" shall mean all taxes, charges,
         fees, duties, levies, penalties or other assessments imposed by any
         federal, state, local or foreign governmental authority, including,
         but not limited to, income, gross receipts, excise, property, sales,
         gain, use, license, custom duty, unemployment, capital stock,
         transfer, franchise, payroll, withholding, social security, minimum
         estimated, and other taxes, and shall include interest, penalties or
         additions attributable thereto; and

                           (ii) "Tax Return" shall mean any return,
         declaration, report, claim for refund, or information return or
         statement relating to Taxes, including any schedule or attachment
         thereto, and including any amendment thereof.

                  Section 3.11 Title and Condition of Properties. Neither the
Company nor any of its Subsidiaries own any real property. The Company and its
Subsidiaries own good and marketable title, free and clear of all Encumbrances,
to all of the personal property and assets shown on the Balance Sheet or
acquired after December 31, 1995, except for (A) assets which have been
disposed of to nonaffiliated third parties since December 31, 1995 in the
ordinary course of business, (B) Encumbrances reflected in the Balance Sheet or
in the notes thereto, (C) Encumbrances or imperfections of title which are not,
individually or in the aggregate, material in character, amount or extent and
which do not materially detract from the value or materially interfere with the
present or presently contemplated use of the assets subject thereto or affected
thereby, and (D) Encumbrances for current Taxes not yet due and payable. All of
the machinery, equipment and other tangible personal property and assets owned
or used by the Company and its Subsidiaries are in good condition and repair,
except for ordinary wear and tear not caused by neglect, and are useable in the
ordinary course of business. The personal property and assets reflected on the
Balance Sheet or acquired after December 31, 1995, the rights under the Company
Agreements and the Intellectual Property (as defined in Section 3.12) owned or
used by the Company under valid Li-


                                                 31




    
<PAGE>




cense (as defined in Section 3.12), collectively include all assets necessary
to provide, produce, sell and license the services and products currently
provided, produced, sold and licensed by the Company and its Subsidiaries and
to conduct the business of the Company and its Subsidiaries as presently
conducted or as currently contemplated to be conducted, provided that the
Company makes no warranty with respect to infringement of intellectual property
rights of third parties except as expressly provided in Section 3.12(e).

                  Section 3.12  Intellectual Property.

                  (a) Section 3.12(a) of the Company Disclosure Schedule
contains an accurate and complete listing setting forth (x) all registered
Trademarks, Patents, registered Copyrights and registered Mask Works (as each
such term is hereinafter defined) which are owned by the Company or any of its
Subsidiaries and (y) all Licenses to which the Company or any of its
Subsidiaries is a party (other than shrink-wrap software and databases licensed
to the Company or to any of its Subsidiaries under non-exclusive software
licenses granted to end-user customers by third parties in the ordinary course
of business of such third parties' businesses), such schedule indicating, as to
each such License, whether the Company or any of its Subsidiaries is the
licensee or licensor, whether it is royalty bearing, the territory, whether it
is exclusive or non-exclusive, and the nature of the licensed property.

                  (b) Except as set forth in Section 3.12(b)(i) of the Company
Disclosure Schedule, neither the Company nor any of its Subsidiaries is under
any obligation to pay any royalty or other compensation to any third party or
to obtain any approval or consent for the use of any Intellectual Property used
in or necessary for its business as currently conducted or as currently
proposed to be conducted. None of the Intellectual Property owned by the
Company or by any of its Subsidiaries, or to the Company's knowledge, licensed
to the Company or to any of its Subsidiaries, is subject to any outstanding
judgment, order, decree, stipulation, injunction or charge. Except as set forth
in Section 3.12(b)(ii) of the Company Disclosure Schedule, there is no claim,
charge, complaint, action, suit, proceeding, hearing, investigation or demand
pending or, to the Company's knowledge, threat-


                                                 32




    
<PAGE>




ened, which challenges the legality, validity, enforceability, or the
Company's or any of its Subsidiaries' use or ownership of any of the
Intellectual Property owned by the Company or any of its Subsidiaries or, to
the Company's knowledge, licensed to the Company or to any of its Subsidiaries.
Neither the Company nor any of its Subsidiaries has agreed to indemnify any
person for or against any interference, infringement, misappropriation, or
other conflict with respect to any Intellectual Property, except as may be
contained within agreements for the sale of the Company's products in the
ordinary course or the Licenses set forth in Section 3.12(a) of the Company
Disclosure Schedule.

                  (c) No material breach or default (or event which with notice
or lapse of time or both would result in a material event of default) by the
Company or any of its Subsidiaries exists or has occurred under any License or
other agreement pursuant to which the Company or any of its Subsidiaries uses
any Intellectual Property owned by a third party or has granted any third party
the right to use its Intellectual Property, and the consummation of the
transactions contemplated by this Agreement will not violate or conflict with
or constitute a material default (or an event which, with notice or lapse of
time or both, would constitute a material default), result in a forfeiture
under, or constitute a basis for termination of any such License or other
agreement.

                  (d) The Company and its Subsidiaries own all items of
Intellectual Property set forth in Schedule 3.12(a) and own or have the right
to use all items of Intellectual Property necessary to provide, produce, sell
and license the services and products currently provided, produced, sold and
licensed by the Company and its Subsidiaries and to conduct the business of the
Company and its Subsidiaries as presently conducted or as currently proposed to
be conducted, free and clear of all Encumbrances, provided that the Company
makes no warranty with respect to infringement of intellectual property rights
of third parties except as expressly provided in Section 3.12(e).

                  (e) To the Company's knowledge, except as set forth in
Section 3.12(e) of the Company Disclosure Schedule, the conduct of the
Company's and its Subsidiaries' business, the Intellectual Property owned or
used by the


                                                 33




    
<PAGE>




Company and its Subsidiaries, and the products or services produced, sold or
licensed by or under development by the Company and its Subsidiaries do not
infringe any Intellectual Property rights or any other proprietary right of any
person or give rise to any obligations to any person as a result of
co-authorship, co-inventorship, or an express or implied contract for any use
or transfer. The Company and its Subsidiaries have received no notice of any
allegations or threats that the Company's and its Subsidiaries' use of any of
the Intellectual Property infringes upon or is in conflict with any
Intellectual Property or proprietary rights of any third party, and to the
Company's knowledge, no basis exists for any such allegations or threats.

                  (f) Except as set forth on Section 3.12(f) of the Company
Disclosure Schedule, neither the Company nor any of its Subsidiaries has sent
or otherwise communicated to any other person any notice, charge, claim or
assertion of any present, impending or threatened infringement by any other
person of any Intellectual Property of the Company and its Subsidiaries.

                  (g) None of the Company's and its Subsidiaries' products or
services incorporate, are based upon or are derived or adapted from, any
Intellectual Property of any other person in violation of any statutory or
other legal obligation or any agreement to which the Company and its
Subsidiaries is a party or by which it is bound.

                  (h) All of the Company's and its Subsidiaries' Patents,
Trademarks and Copyrights issued by, registered with or filed with the United
States Patent and Trademark Office or Register of Copyrights or the
corresponding offices of other countries have been so duly registered, filed in
or issued, as the case may be, have been properly maintained and renewed in
accordance with all applicable provisions of law and administrative
regulations, and the Company and its Subsidiaries, as the case may be, are the
record owners thereof. The Company and its Subsidiaries have taken reasonable
steps in accordance with normal industry practice to maintain the
confidentiality of its trade secrets and other confidential Intellectual
Property, and, to the Company's knowledge, there have been no acts or omissions
by the Company or its Subsidiaries, the result of which would be to compromise
the rights of the Company or its Subsidiaries to apply for or


                                                 34




    
<PAGE>




enforce appropriate legal protection of such Intellectual Property.

                  (i) Except as described in Section 3.12(i) of the Company
Disclosure Schedule, each of the Company's and its Subsidiaries' employees,
officers, agents, directors and each independent contractor retained by the
Company or any of its Subsidiaries has entered into a written agreement with
the Company or any of its Subsidiaries (x) providing that all of the Company's
and its Subsidiaries' Intellectual Property is confidential and proprietary to
the Company or any of its Subsidiaries, and (y) obligating the disclosure and
transfer to the Company or any of its Subsidiaries, in consideration for no
more than normal salary and continued employment or consultant fees, as the
case may be, of all inventions, developments and work product which during the
period of his or her employment or consultancy with the Company or any of its
Subsidiaries, as the case may be, such employee, officer, agent, director or
independent contractor made or makes that related or relate to any subject
matter with which such employee's, officer's, agent's, director's or
independent contractor's work for the Company or any of its Subsidiaries was
concerned, or, in the case of employees, officers, agents and directors, are
made during such person's period of employment (or contractual relationship) or
in connection therewith. No former employees, officers, directors or
independent contractors of the Company or any of its Subsidiaries have asserted
any claim, or have any, valid claim or valid right to any of the Company's or
any of its Subsidiaries' Intellectual Property used in or necessary for the
conduct of the Company's or its Subsidiaries' business as now conducted or as
currently proposed to be conducted. To the Company's knowledge, no employee,
officer, agent or director of the Company or any of its Subsidiaries is a party
to or otherwise bound by any agreement with or obligated to any other person
(including, any former employer) which conflicts with any obligation or
commitment of such employee to the Company or any of its Subsidiaries under any
agreement to which he or she is a party or otherwise.

                  (j) Section 3.12(j) of the Company Disclosure Schedule
identifies each person to whom the Company or any of its Subsidiaries has sold
or otherwise transferred any interest or rights to any Intellectual Property


                                                 35




    
<PAGE>




(other than end users under licenses for computer software and related
documentation transferred in the ordinary course of business) or purchased
rights in any Intellectual Property, and the date, if applicable, of each such
sale, transfer or purchase.

                  (k) The Company and each of its Subsidiaries have taken
reasonable steps in accordance with normal industry practice to preserve and
maintain, reasonably complete notes and records (including, without limitation,
drawings, flow-charts, prototypes and models) relating to its know-how,
inventions, processes, procedures, drawings, specifications, designs, plans,
written proposals, technical data, works of authorship and other proprietary
technical information, sufficient to cause such proprietary information to be
readily identified, understood and available.

                  (l) As used in this Agreement, "Intellectual Property" means
all of the following: (i) U.S., Israeli and foreign registered and unregistered
trademarks, trade dress, service marks, logos, trade names, corporate names and
all registrations and applications to register the same (the "Trademarks");
(ii) issued U.S., Israeli and foreign patents and pending patent applications,
patent disclosures, and any and all divisions, continuations,
continuations-in-part, reissues, reexaminations, and extension thereof, any
counterparts claiming priority therefrom, utility models, patents of importa-
tion/confirmation, certificates of invention and like statutory rights (the
"Patents"); (iii) U.S., Israeli and foreign registered and unregistered
copyrights (including, but not limited to, those in computer software and
databases) rights of publicity and all registrations and applications to
register the same (the "Copyrights"); (iv) U.S., Israeli and foreign rights in
any semi-conductor chip product works or "mask works" as such term is defined
in 17 U.S.C. 901, et seq. and any registrations or applications therefor ("Mask
Works"); (v) all categories of trade secrets as defined in the Uniform Trade
Secrets Act including, but not limited to, business information; (vi) all
licenses and agreements pursuant to which the Company has acquired rights in or
to any Trademarks, Patents, Copyrights or Mask Works, or licenses and
agreements pursuant to which the Company has licensed or transferred the right
to use any of the foregoing ("Licenses").


                                                 36




    
<PAGE>




                  Section 3.13 Employment Matters. To the Company's knowledge,
no key employee or group of employees has any plans to terminate their
employment with the Company or any of its Subsidiaries as a result of the
transactions contemplated hereby or otherwise. Neither the Company nor any of
its Subsidiaries has experienced any strikes, collective labor grievances,
other collective bargaining disputes or Claims of unfair labor practices in the
last five years. To the Company's knowledge, there is no organizational effort
presently being made or threatened by or on behalf of any labor union with
respect to employees of the Company and its Subsidiaries.

                  Section 3.14 Compliance with Laws. The Company and its
Subsidiaries are in substantial compliance with, and have not violated any
applicable law, rule or regulation of any United States federal, state, local,
Israeli or other foreign government or agency thereof which materially affects
the business, properties or assets of the Company and its Subsidiaries, and no
notice, charge, claim, action or assertion has been received by the Company or
any of its Subsidiaries or has been filed, commenced or, to the Company's
knowledge, threatened against the Company or any of its Subsidiaries alleging
any such violation, except for any matter otherwise covered by this sentence
which does not have a material adverse effect on the Company and its
Subsidiaries taken as a whole. All licenses, permits and approvals required
under such laws, rules and regulations are in full force and effect except
where the failure to be in full force and effect would not have a material
adverse effect on the Company and its Subsidiaries taken as a whole.

                  Section 3.15 Contracts. Each Company Agreement is legally
valid and binding and in full force and effect, except where failure to be
legally valid and binding and in full force and effect would not have a
material adverse effect on the Company and its Subsidiaries, taken as a whole,
and there are no defaults by the Company or any of its Subsidiaries thereunder,
except those defaults that would not have a material adverse effect on the
Company and its Subsidiaries, taken as a whole. The Company has previously made
available for inspection by Parent or the Purchaser or their representatives
all of the Company Agreements. Set forth in


                                                 37




    
<PAGE>




Section 3.15 of the Company Disclosure Schedule is a true and complete list
of all agreements, contracts or other arrangements, written or oral, to which
ICT Integrated Circuit Testing GmbH ("ICT") or any of its Subsidiaries is a
party or by which ICT or any of its Subsidiaries or any of its or their assets
may be bound (the "ICT Agreements") concerning or relating to (i) Intellectual
Property, (ii) the spin-off or other disposition of assets, (iii) which are
necessary to provide, produce, sell and license the services and products
currently provided, produced, sold and licensed by ICT and its Subsidiaries and
to conduct the business of ICT and its Subsidiaries as presently conducted or
as currently contemplated to be conducted. Each ICT Agreement is valid,
binding, enforceable and in full force and effect. None of the execution,
delivery or performance of this Agreement by the Company, the consummation by
the Company of the transactions contemplated hereby or compliance by the
Company with any of the provisions hereof will result in a breach of, or
constitute (with or without due notice or lapse of time or both) a default (or
give rise to any right of termination, amendment, cancellation or acceleration)
under, any of the terms, conditions or provisions of any ICT Agreement. None of
ICT or any of its Subsidiaries is or, to the Company's knowledge, any other
party is in breach or default (including, with respect to any express or
implied warranty), and no event has occurred which with notice or lapse of time
or both would constitute a material breach or default or permit termination,
modification or acceleration under any ICT Agreement, except for any breaches,
defaults, terminations, modifications or accelerations which have been cured or
waived; and no party has, to the Company's knowledge, repudiated any provision
of any such ICT Agreement.

                  Section 3.16 Potential Conflicts of Interest. Except as set
forth in Section 3.16 of the Company Disclosure Schedule or in the Company SEC
Reports, to the Company's knowledge, no officer of the Company or any of its
Subsidiaries owns, directly or indirectly, any interest in (excepting not more
than 1% stock holdings for investment purposes in securities of publicly held
and traded companies) or is an officer, director, employee or consultant of any
person which is a competitor, lessor, lessee, customer or supplier of the
Company or any of its Subsidiaries; and no officer or director of the Company
or any of its Subsidiaries (i) owns, directly or indi-


                                                 38




    
<PAGE>




rectly, in whole or in part, any Intellectual Property which the Company or any
of its Subsidiaries is using or the use of which is necessary for the business
of the Company or any of its Subsidiaries; (ii) has any claim, charge, action
or cause of action against the Company or any of its Subsidiaries, except for
claims for accrued vacation pay, accrued benefits under the Benefit Plans and
similar matters and agreements existing on the date hereof; (iii) has made, on
behalf of the Company or any of its Subsidiaries, any payment or commitment to
pay any commission, fee or other amount to, or to purchase or obtain or
otherwise contract to purchase or obtain any goods or services from, any other
person of which any officer or director of the Company, or, to the Company's
knowledge, a relative of any of the foregoing, is a partner or stockholder
(except stock holdings solely for investment purposes in securities of publicly
held and traded companies); (iv) owes any money to the Company or any of its
Subsidiaries; or (v) is owed any money by the Company or any of its
Subsidiaries. Opal Technologies Ltd. is not a party to any contract with an
"interested party" or any contract in which an "officer" has a "personal
interest" (as each of such terms is defined in Chapter 4A of the Israeli
Companies Ordinance, 1983).

                  Section 3.17 Vote Required. The affirmative vote of the
holders of a majority of the outstanding Shares are the only votes of the
holders of any class or series of the Company's capital stock necessary to
approve this Agreement and the transactions contemplated hereby.

                  Section 3.18 Suppliers and Customers. From December 31, 1995
to the date of this Agreement, no material licensor, vendor, supplier, licensee
or customer of the Company or any of its Subsidiaries has cancelled or
otherwise modified its relationship with the Company or its Subsidiaries and,
to the Company's knowledge, no such person has any intention to do so. Except
as set forth in Section 3.18 of the Company Disclosure Schedule, no material
customer of the Company or any of its Subsidiaries has expressed to the Company
any material dissatisfaction with any of the products of the Company or any of
its Subsidiaries, respectively, which is likely to result in an adverse impact
on such customer's continuing relationship with the Company or any of its
Subsidiaries, and the Company and its Subsidiaries have not experienced any


                                                 39




    
<PAGE>




complaints of a recurring nature with respect to any of their products.

                  Section 3.19 Information in Proxy Statement. The Proxy
Statement, if any (or any amendment thereof or supplement thereto), will, at
the date mailed to Company stockholders and at the time of the meeting of
Company stockholders to be held in connection with the Merger, not contain any
untrue statement of a material fact or omit to state any material fact required
to be stated therein or necessary in order to make the statements therein, in
light of the circumstances under which they are made, not misleading, except
that no representation is made by the Company with respect to statements made
therein based on information supplied by Parent or the Purchaser for inclusion
in the Proxy Statement. The Proxy Statement will comply in all material
respects with the provisions of the Exchange Act and the rules and regulations
thereunder.

                  Section 3.20 Opinion of Financial Advisor. The Company has
received the opinion of Robertson Stephens & Company, dated the date hereof, to
the effect that, as of such date, the consideration to be received in the Offer
and the Merger by the Company's stockholders is fair to the Company's
stockholders from a financial point of view, a copy of which opinion has been
delivered to Parent and the Purchaser.


                                   ARTICLE IV

                         REPRESENTATIONS AND WARRANTIES
                          OF PARENT AND THE PURCHASER

                  Parent and the Purchaser represent and warrant to the Company
that the statements contained in this Article IV are true and correct as of the
date of this Agreement and will be correct and complete as of the Closing Date
as though made on the Closing Date.

                  Section 4.1 Organization.  Each of Parent and the Purchaser is
a corporation duly organized, validly existing and in good standing under the
laws of Delaware and has all requisite corporate or other power and authority
and all necessary governmental approvals to own, lease and operate its
properties and to carry on its


                                                 40




    
<PAGE>




business as now being conducted, except where the failure to be so organized,
existing and in good standing or to have such power, authority, and
governmental approvals would not have a material adverse effect on Parent and
its Subsidiaries, taken as a whole. Parent and each of its Subsidiaries is duly
qualified or licensed to do business and in good standing in each jurisdiction
in which the property owned, leased or operated by it or the nature of the
business conducted by it makes such qualification or licensing necessary,
except where the failure to be so duly qualified or licensed and in good
standing would not, individually or in the aggregate, have a material adverse
effect on Parent and its Subsidiaries, taken as a whole.

                  Section 4.2 Authorization; Validity of Agreement; Necessary
Action. Each of Parent and the Purchaser has full corporate power and authority
to execute and deliver this Agreement and to consummate the transactions
contemplated hereby. The execution, delivery and performance by Parent and the
Purchaser of this Agreement, and the consummation of the Merger and of the
transactions contemplated hereby have been duly authorized by the Board of
Directors of Parent and the Purchaser and by Parent as the sole stockholder of
the Purchaser and no other corporate action on the part of Parent and the
Purchaser is necessary to authorize the execution and delivery by Parent and
the Purchaser of this Agreement and the consummation of the transactions
contemplated hereby. This Agreement has been duly executed and delivered by
Parent and the Purchaser, as the case may be, and, assuming due and valid
authorization, execution and delivery hereof by the Company, is a valid and
binding obligation of each of Parent and the Purchaser, as the case may be,
enforceable against each of them in accordance with its respective terms.

                  Section 4.3 Consents and Approvals; No Violations. Except as
set forth in Section 4.3 of the schedule attached to this Agreement setting
forth exceptions to Parent's representations and warranties set forth herein
and except for filings, permits, authorizations, consents and approvals as may
be required under, and other applicable requirements of, the Exchange Act, the
HSR Act, state securities or blue sky laws and the DGCL, none of the execution,
delivery or performance of this Agreement by Parent or the Purchaser, the
consummation by

                                                 41




    
<PAGE>




Parent or the Purchaser of the transactions contemplated hereby or compliance
by Parent or the Purchaser with any of the provisions hereof will (i) conflict
with or result in any breach of any provision of the respective certificate of
incorporation or by-laws of Parent or the Purchaser, (ii) require any filing
with, or permit, authorization, consent or approval of, any Governmental Entity,
(iii) result in a violation or breach of, or constitute (with or without due
notice or lapse of time or both) a default (or give rise to any right of
termination, cancellation or acceleration) under, any of the terms, conditions
or provisions of any note, bond, mortgage, indenture, lease, license, contract,
agreement or other instrument or obligation to which Parent, or any of its
Subsidiaries or the Purchaser is a party or by which any of them or any of their
respective properties or assets may be bound, or (iv) violate any order, writ,
injunction, decree, statute, rule or regulation applicable to Parent, any of its
Subsidiaries or any of their properties or assets, excluding from the foregoing
clauses (ii),(iii) and (iv) such violations, breaches or defaults which would
not, individually or in the aggregate, have a material adverse effect on Parent
and its Subsidiaries, taken as a whole.

                  Section 4.4 Information in Proxy Statement. None of the
information supplied by Parent or the Purchaser specifically for inclusion or
incorporation by reference in the Proxy Statement will, at the date mailed to
stockholders and at the time of the meeting of stockholders to be held in
connection with the Merger, contain any untrue statement of a material fact or
omit to state any material fact required to be stated therein or necessary in
order to make the statements therein, in light of the circumstances under which
they are made, not misleading.

                  Section 4.5 Financing. Parent and the Purchaser (i) have bank
facilities in place which, either alone or with cash presently on hand, will
provide sufficient funds to purchase and pay for the Shares pursuant to the
Offer and the Merger in accordance with the terms of this Agreement and to
consummate the other transactions contemplated hereby and (ii) will have on the
expiration date of the Offer and the Effective Date sufficient funds to
purchase and pay for the Shares pursuant to the Offer and the Merger,
respectively, in

                                                 42




    
<PAGE>




accordance with the terms of this Agreement. The Parent's bank facilities permit
Parent to borrow money under such facilities and use such funds to purchase and
pay for the Shares pursuant to the Offer and the Merger in accordance with the
terms of this Agreement and to consummate the other transactions contemplated
hereby.

                  Section 4.6 Options. The Parent Options to be granted by
Parent under Section 2.4(a) shall be duly authorized, valid and enforceable in
accordance with the terms of said Section 2.4(a), and any shares of Parent
Common Stock issued upon proper exercise thereof shall be duly and validly
issued, fully paid and non-assessable.

                  Section 4.7 Company Shares. As of the date of this Agreement,
neither Parent nor any of its Subsidiaries owns any Shares or is acting
together with any other person in connection with the Offer.

                                   ARTICLE V

                                   COVENANTS

                  Section 5.1 Interim Operations of the Company. The Company
covenants and agrees that, except (i) as expressly contemplated by this
Agreement, (ii) as set forth in Section 5.1 of the Company Disclosure Schedule,
or (iii) as agreed in writing by Parent, after the date hereof, and prior to
the time the directors of the Purchaser have been elected to, and shall
constitute a majority of, the Board of Directors of the Company pursuant to
Section 1.3 (the "Appointment Date"):

                           (a)  the business of the Company and its
Subsidiaries shall be conducted only in the ordinary and usual course and, to
the extent consistent therewith, each of the Company and its Subsidiaries shall
use its best reasonable efforts to preserve its business organization intact
and maintain its existing relations with customers, suppliers, employees,
creditors and business partners;

                           (b)  the Company will not, directly or
indirectly, (i) sell, transfer or pledge or agree to sell, transfer or pledge
any treasury stock of the Company or any capital stock of any of its
Subsidiaries beneficially owned by it, (ii) amend its Certificate of


                                                 43




    
<PAGE>




Incorporation or By-laws or similar organizational documents; or (iii) split,
combine or reclassify the outstanding Shares or Preferred Stock or any
outstanding capital stock of any of the Subsidiaries of the Company;

                           (c)  neither the Company nor any of its
Subsidiaries shall: (i) declare, set aside or pay any dividend or other
distribution payable in cash, stock or property with respect to its capital
stock; (ii) issue, sell, pledge, dispose of or encumber any additional shares
of, or securities convertible into or exchangeable for, or options, warrants,
calls, commitments or rights of any kind to acquire, any shares of capital
stock of any class of the Company or its Subsidiaries, other than Shares
reserved for issuance on the date hereof pursuant to the exercise of Company
Options outstanding on the date hereof or pursuant to the 1995 Plan as
permitted in Section 2.4 hereof; (iii) transfer, lease, license, sell,
mortgage, pledge, dispose of, or encumber any material assets other than in the
ordinary and usual course of business and consistent with past practice, or
incur or modify any material indebtedness or other liability, other than in the
ordinary and usual course of business and consistent with past practice; or
(iv) redeem, purchase or otherwise acquire directly or indirectly any of its
capital stock except pursuant to stock restriction agreements with employees
existing at the date hereof and set forth in Section 3.2(a) of the Company
Disclosure Schedule;

                           (d)  neither the Company nor any of its
Subsidiaries shall: (i) grant any increase in the compensation payable or to
become payable by the Company or any of its Subsidiaries to any of its
executive officers or key employees except inflationary increases given in
accordance with past practice; or (ii)(A) adopt any new, or (B) amend or
otherwise increase, or accelerate the payment or vesting of the amounts payable
or to become payable under any existing bonus, incentive compensation, deferred
compensation, severance, profit sharing, stock option, stock purchase,
insurance, pension, retirement or other employee benefit plan, agreement or
arrangement, including, without limitation, the Option Plan and the 1995 Plan;
or (iii) enter into any employment or severance agreement with or, except in
accordance with the existing written policies of the Company, grant any


                                                 44




    
<PAGE>




severance or termination pay to any officer, director or employee of the
Company or any its Subsidiaries;

                           (e)  neither the Company nor any of its
Subsidiaries shall modify, amend or terminate any of its material contracts or
waive, release or assign any material rights or claims, except in the ordinary
course of business and consistent with past practice;

                           (f)  neither the Company nor any of its
Subsidiaries shall permit any material insurance policy naming it as a
beneficiary or a loss payable payee to be cancelled or terminated without
notice to Parent, except in the ordinary course of business and consistent with
past practice;

                           (g)  neither the Company nor any of its
Subsidiaries shall: (i) incur or assume any long-term debt, or except in the
ordinary course of business, incur or assume any short-term indebtedness in
amounts not consistent with past practice; (ii) assume, guarantee, endorse or
otherwise become liable or responsible (whether directly, contingently or
otherwise) for the obligations of any other person, except in the ordinary
course of business and consistent with past practice; (iii) make any loans,
advances or capital contributions to, or investments in, any other person
(other than to wholly owned Subsidiaries of the Company); or (iv) enter into
any material commitment or transaction (including, but not limited to, any
material capital expenditure or purchase or lease of assets or real estate
other than the purchase of products for inventory and supplies in the ordinary
course of business);

                           (h)  neither the Company nor any of its
Subsidiaries shall change any of the accounting methods
used by it unless required by GAAP;

                           (i)  neither the Company nor any of its
Subsidiaries shall pay, discharge or satisfy any claims, liabilities or
obligations (absolute, accrued, asserted or unasserted, contingent or
otherwise), other than the payment, discharge or satisfaction in the ordinary
course of business and consistent with past practice, of claims, liabilities or
obligations reflected or reserved against in, or contemplated by, the
consolidated financial state-



                                                 45




    
<PAGE>




ments (or the notes thereto) of the Company and its consolidated Subsidiaries;

                           (j)  neither the Company nor any of its
Subsidiaries will adopt a plan of complete or partial liquidation, dissolution,
merger, consolidation, restructuring, recapitalization or other reorganization
of the Company or any of its Subsidiaries (other than the Merger);

                           (k)  neither the Company nor any of its
Subsidiaries will take, or agree to commit to take, any action that would or is
reasonably likely to result in any of the conditions to the Offer set forth in
Annex A or any of the conditions to the Merger set forth in Article VI not
being satisfied, or would make any representation or warranty of the Company
contained herein inaccurate in any respect at, or as of any time prior to, the
Effective Time, or that would materially impair the ability of the Company to
consummate the Offer or the Merger in accordance with the terms hereof or
materially delay such consummation; and

                           (l)  neither the Company nor any of its
Subsidiaries will enter into an agreement, contract, commitment or arrangement
to do any of the foregoing, or to authorize, recommend, propose or announce an
intention to do any of the foregoing.

                  Section 5.2 Access; Confidentiality. Upon reasonable notice,
the Company shall (and shall cause each of its Subsidiaries to) afford to the
officers, employees, accountants, counsel, financing sources and other
representatives of Parent, access, during normal business hours during the
period prior to the Appointment Date, to all its properties, books, contracts,
commitments and records and, during such period, the Company shall (and shall
cause each of its Subsidiaries to) furnish promptly to the Parent (a) a copy of
each report, schedule, registration statement and other document filed or
received by it during such period pursuant to the requirements of federal
securities laws and (b) all other information concerning its business,
properties and personnel as Parent may reasonably request. After the
Appointment Date the Company shall provide Parent and such persons as Parent
shall designate with all such information, at such time as Parent shall request.


                                                 46




    
<PAGE>




Unless otherwise required by law and until the Appointment Date, Parent will
hold any such information which is nonpublic in confidence in accordance with
the provisions of a letter agreement dated October 21, 1996 between the Company
and the Parent (the "Confidentiality Agreement").

                  Section 5.3 Consents and Approvals. (a) Each of the Company,
Parent and the Purchaser will take all reasonable actions necessary to comply
promptly with all legal requirements which may be imposed on it with respect to
this Agreement and the transactions contemplated hereby (which requirements
shall include, without limitation, those identified in Section 5.3(a) of the
Company Disclosure Schedule attached to this Agreement, and which actions shall
include, without limitation, furnishing all information required under the HSR
Act and in connection with approvals of or filings with any other Governmental
Entity) and will promptly cooperate with and furnish information to each other
in connection with any such requirements imposed upon any of them or any of
their Subsidiaries in connection with this Agreement and the transactions
contemplated hereby. Each of the Company, Parent and the Purchaser will, and
will cause its Subsidiaries to, take all reasonable actions necessary to obtain
(and will cooperate with each other in obtaining) any consent, authorization,
order or approval of, or any exemption by, any Governmental Entity or other
public or private third party required to be obtained or made by Parent, the
Purchaser, the Company or any of their Subsidiaries in connection with the
Merger or the taking of any action contemplated thereby or by this Agreement.

                           (b)  The Company and Parent shall take all
reasonable actions necessary to file as soon as practicable notifications under
the HSR Act and to respond as promptly as practicable to any inquiries received
from the Federal Trade Commission and the Antitrust Division of the Department
of Justice for additional information or documentation and to respond as
promptly as practicable to all inquiries and requests received from any State
Attorney General or other Governmental Entity in connection with antitrust
matters.

                  Section 5.4  No Solicitation.  (a)  Neither the Company nor
any of its Subsidiaries shall (and the Company shall use its best efforts to
cause its officers, directors, employees, representatives and agents, includ-


                                                 47




    
<PAGE>




ing, but not limited to, investment bankers, attorneys and accountants, not to),
directly or indirectly, encourage, solicit, participate in or initiate
discussions or negotiations with, or provide any information to, any
corporation, partnership, person or other entity or  group (other than Parent,
any of its affiliates or representatives) concerning any proposal or offer to
acquire all or a substantial part of the business and properties of the Company
or any of its Subsidiaries or any capital stock of the Company or any of its
Subsidiaries, whether by merger, tender offer, exchange offer, sale of assets or
similar transactions involving the Company or any Subsidiary, division or
operating or principal business unit of the Company (an "Acquisition Proposal"),
except that nothing contained in this Section 5.4 or any other provision hereof
shall prohibit the Company or the Company's Board from (i) taking and disclosing
to the Company's stockholders a position with respect to a tender or exchange
offer by a third party pursuant to Rules 14d-9 and 14e-2 promulgated under the
Exchange Act, or (ii) making such disclosure to the Company's stockholders as,
in the good faith judgment of the Board, after receiving advice from outside
counsel, is required under applicable law, provided that the Company may not,
except as permitted by Section 5.4(b), withdraw or modify, or propose to
withdraw or modify, its position with respect to the Offer or the Merger or
approve or recommend, or propose to approve or recommend, any Acquisition
Proposal, or enter into any agreement with respect to any Acquisition Proposal.
The Company will immediately cease any existing activities, discussions or
negotiations with any parties conducted heretofore with respect to any of the
foregoing. Notwithstanding the foregoing, the Company may furnish information
concerning its business, properties or assets to any corporation, partnership,
person or other entity or group pursuant to appropriate confidentiality
agreements, and may negotiate and participate in discussions and negotiations
with such entity or group concerning an Acquisition Proposal if (x) such entity
or group has on an unsolicited basis submitted a bona fide written proposal to
the Board of Directors of the Company relating to any such transaction which
the Board determines in good faith, represents a superior transaction to the
Offer and the Merger and which is not conditioned upon obtaining additional
financing and (y) in the opinion of the Board of Directors of the Company, only
after receipt of advice from outside legal counsel to the


                                                 48




    
<PAGE>




Company, the failure to provide such information or access or to engage in such
discussions or negotiations could reasonably be expected to cause the Board of
Directors to violate its fiduciary duties to the Company's stockholders under
applicable law (an Acquisition Proposal which satisfies clauses (x) and (y)
being referred to herein as a "Superior Proposal"). The Company will immediately
notify Parent of the existence of any proposal or inquiry received by the
Company and the identity of the party making such proposal or inquiry which it
may receive in respect of any such transaction.

                           (b)      Except as set forth herein, neither
the Board of Directors of the Company nor any committee thereof shall (i)
withdraw or modify, or propose to withdraw or modify, in a manner adverse to
Parent or the Purchaser, the approval or recommendation by such Board of
Directors or any such committee of the Offer, this Agreement or the Merger,
(ii) approve or recommend, or propose to approve or recommend, any Acquisition
Proposal or (iii) enter into any agreement with respect to any Acquisition
Proposal. Notwithstanding the foregoing, prior to the time of acceptance for
payment of Shares in the Offer, the Board of Directors of the Company may
(subject to the terms of this and the following sentence) withdraw or modify
its approval or recommendation of the Offer, this Agreement or the Merger,
approve or recommend a Superior Proposal, or enter into an agreement with
respect to Superior Proposal, in each case at any time after the second
business day following Parent's receipt of written notice advising Parent that
the Board of Directors has received a Superior Proposal, specifying the
material terms and conditions of such Superior Proposal and identifying the
person making such Superior Proposal; provided that the Company shall not enter
into an agreement with respect to a Superior Proposal unless the Company shall
have furnished Parent with written notice not later than 12:00 noon one day in
advance of any date that it intends to enter into such agreement and shall have
caused its financial and legal advisors to negotiate with Parent to make such
adjustments in the terms and conditions of this Agreement as would enable the
Company to proceed with the transactions contemplated herein on such adjusted
terms. In addition, if the Company proposes to enter into an agreement with
respect to any Acquisition Proposal, it shall concurrently with entering into
such agreement pay, or cause to be paid, to


                                                 49




    
<PAGE>




Parent the Termination Fee (as defined in Section 8.1(b)) subject to the
provisions of Section 8.1(b).

                  Section 5.5 Brokers or Finders. The Company represents, as to
itself and its Subsidiaries and affiliates, that no agent, broker, investment
banker, financial advisor or other firm or person is or will be entitled to any
brokers' or finder's fee or any other commission or similar fee from the
Company or any of its Subsidiaries in connection with any of the transactions
contemplated by this Agreement except for Robertson, Stephens & Company LLC and
Evergreen Capital Markets Ltd., whose engagement letter is attached as Section
5.5 of the Company Disclosure Schedule.

                  Section 5.6 Additional Agreements. Subject to the terms and
conditions herein provided, each of the parties hereto shall use all reasonable
efforts to take, or cause to be taken, all action and to do, or cause to be
done, all things necessary, proper or advisable under applicable laws and
regulations, or to remove any injunctions or other impediments or delays, legal
or otherwise, to achieve the satisfaction of the Minimum Condition and all
conditions set forth in Annex A and Article VI, and to consummate and make
effective the Merger and the other transactions contemplated by this Agreement.
Without limitation of the foregoing, Parent, Purchaser and the Company shall
take such steps and provide and comply with such undertakings as may be
required by any Governmental Entity whose approval or consent, or with respect
to which a waiting period must expire, to satisfy the conditions set forth in
Annex A and to assure that the Parent Options may properly be issued under
Section 2.4(a); provided that such steps and undertakings shall not impose upon
the Company or Parent and the Purchaser any terms or conditions which Parent
determines reasonably and in good faith to be unreasonably burdensome to Parent
or the Purchaser or to the operations of the Company on a going-forward basis.
In case at any time after the Effective Time any further action is necessary or
desirable to carry out the purposes of this Agreement, the proper officers and
directors of the Company, Parent and the Purchaser shall use all reasonable
efforts to take, or cause to be taken, all such necessary actions.

                  Section 5.7 Publicity. The initial press release with respect
to the execution of this Agreement


                                                 50




    
<PAGE>


shall be a joint press release acceptable to Parent and the Company. Thereafter,
so long as this Agreement is in effect, neither the Company, Parent nor any of
their respective affiliates shall issue or cause the publication of any press
release or other announcement with respect to the Merger, this Agreement or the
other transactions contemplated hereby without the prior consultation of the
other party, except as may be required by law or by any listing agreement with
a national securities exchange or trading market.

                  Section 5.8 Notification of Certain Matters. The Company
shall give prompt notice to Parent and Parent shall give prompt notice to the
Company, of (i) the occurrence or non-occurrence of any event the occurrence or
non-occurrence of which would cause any representation or warranty contained in
this Agreement to be untrue or inaccurate in any material respect at or prior
to the Effective Time and (ii) any material failure of the Company, Parent or
the Purchaser, as the case may be, to comply with or satisfy any covenant,
condition or agreement to be complied with or satisfied by it hereunder;
provided, however, that the delivery of any notice pursuant to this Section 5.8
shall not limit or otherwise affect the remedies available hereunder to the
party receiving such notice.

                  Section 5.9 Directors' and Officers' Insurance and
Indemnification. (a) For seven years after the Effective Time, Parent shall,
and shall cause the Surviving Corporation (or any successor to the Surviving
Corporation) to, (i) retain all provisions of the Company's Certificate of
Incorporation as now in effect respecting the limitation of liabilities of
directors and officers, and (ii) indemnify, defend and hold harmless the
present and former officers and directors of the Company and its Subsidiaries,
and persons who become any of the foregoing prior to the Effective Time (each
an "Indemnified Party") against all losses, claims, damages, liabilities,
costs, fees and expenses (including reasonable fees and disbursements of
counsel and judgments, fines, losses, claims, liabilities and amounts paid in
settlement (provided that any such settlement is effected with the written
consent of the Parent or the Surviving Corporation which consent shall not
unreasonably be withheld)) arising out of actions or omissions occurring at or
prior to the Effective Time to the full extent permitted under


                                                 51




    
<PAGE>




Delaware law, subject to the terms of the Company's Certificate of Incorporation
or the By-laws, as in effect at the date hereof, including provisions relating
to advancement of expenses incurred in the defense of any action or suit;
provided that, in the event any claim or claims are asserted or made within
such seven year period, all rights to indemnification in respect of any such
claim or claims shall continue until disposition of any and all such claims;
provided, further, that any determination required to be made with respect to
whether an Indemnified Party's conduct complies with the standards set forth
under Delaware law, the Certificate of Incorporation or the By-Laws, as the
case may be, shall be made by independent counsel mutually acceptable to Parent
and the Indemnified Party and; provided, further, that nothing herein shall
impair any rights or obligations of any present or former directors or officers
of the Company. In the event the Surviving Corporation or any of its successors
or assigns consolidates with or merges into any other person or entity and shall
not be the continuing or surviving corporation or entity of such consolidation
or merger or transfers or conveys all or substantially all of its properties and
assets to any person or entity, then, and in each such case, proper provision
shall be made so that the successors and assigns of the Surviving Corporation
assume the obligations set forth in this Section 5.9.

                           (b)  Parent or the Surviving Corporation
shall maintain the Company's existing officers' and directors' liability
insurance ("D&O Insurance") for a period of not less than seven years after the
Effective Date; provided, that the Parent may substitute therefor policies of
substantially equivalent coverage and amounts containing terms no less
favorable to such former directors or officers; provided, further, if the
existing D&O Insurance expires, is terminated or cancelled during such period,
Parent or the Surviving Corporation will use all reasonable efforts to obtain
substantially similar D&O Insurance; provided, further, however, that in no
event shall the Company be required to pay aggregate premiums for insurance
under this Section in excess of 150% of the aggregate premiums paid by the
Company in 1995 on an annualized basis for such purpose (the "1995 Premium");
and provided, further, that if the Parent or the Surviving Corporation is unable
to obtain the amount of insurance required by this Section 5.9(b) for such
aggregate


                                                 52




    
<PAGE>




premium, Parent or the Surviving Corporation shall obtain as much insurance as
can be obtained for an annual premium not in excess of 150% of the 1995 Premium.

                  Section 5.10  Purchaser Compliance.  Parent shall cause the
Purchaser to comply with all of its obligations under or related to this
Agreement.

                  Section 5.11 Actions of Parent and the Purchaser. Neither
Parent nor the Purchaser will take, or agree to commit to take, any action that
would or is reasonably likely to result in any of the conditions to the Offer
set forth in Annex A or any of the conditions to the Merger set forth in
Article VI not being satisfied, or would make many representation or warranty
of Parent or the Purchaser contained herein inaccurate in any respect at, or as
of any time prior to, the Effective Time, or that would materially impair the
ability of the parties to consummate the Offer or the Merger in accordance with
the terms hereof or materially delay such consummation. Neither Parent nor the
Purchaser will enter into an agreement, contract, commitment or arrangement to
do any of the foregoing, or to authorize, recommend, propose or announce an
intention to do any of the foregoing.

                  Section 5.12 ICT Action. The Company agrees that, prior to
the Closing Date, it shall cause its representatives and agents to consult with
Parent on an ongoing basis with respect to any decisions and other matters in
respect of ICT's discussions with Carl Zeiss and Advantest Corporation and
neither the Company nor any of its representatives shall enter into any
contractual obligation or waive any rights in respect thereof without Parent's
prior written consent.


                                   ARTICLE VI

                                   CONDITIONS

                  Section 6.1 Conditions to Each Party's Obligation to Effect
the Merger. The respective obligation of each party to effect the Merger
shall be subject to the satisfaction on or prior to the Closing Date of
each of the following conditions, any and all of which may be waived in whole
or in part by the Company, Parent

                                                 53




    
<PAGE>




or the Purchaser, as the case may be, to the extent permitted by applicable law:

                           (a)  Stockholder Approval.  This Agreement
shall have been approved and adopted by the requisite vote of the holders of
the Shares, if required by applicable law, in order to consummate the Merger;

                           (b)  Statutes; Consents.  No law, statute,
rule, order, decree or regulation shall have been enacted or promulgated by any
Governmental Entity of competent jurisdiction which declares this Agreement
invalid or unenforceable in any material respect or which prohibits
consummation of the Merger and all governmental consents, orders and approvals
(including, without limitation, those identified in Section 5.3(a) of the
Schedule attached to this Agreement) required for the consummation of the
Merger and the other transactions contemplated hereby shall have been obtained
and shall be in effect at the Effective Time;

                           (c)  Purchase of Shares in Offer.  Parent,
the Purchaser or their affiliates shall have purchased Shares pursuant to the
Offer, except that this condition shall not apply if Parent, the Purchaser or
their affiliates shall have failed to purchase Shares pursuant to the Offer in
breach of their obligations under this Agreement; and

                           (d)  HSR Approval.  The applicable waiting
period under the HSR Act shall have expired or been
terminated.

                  Section 6.2. Condition to Parent's and the Purchaser's
Obligations to Effect the Merger. The obligations of Parent and the Purchaser
to consummate the Merger are further subject to the fulfillment of the
condition that all actions contemplated by Section 2.4 hereof shall have been
taken, which may be waived in whole or in part by Parent and the Purchaser.




                                                 54




    
<PAGE>




                                  ARTICLE VII

                                  TERMINATION

                  Section 7.1 Termination. This Agreement may be terminated and
the transaction contemplated herein may be abandoned at any time prior to the
Effective Time, whether before or after stockholder approval thereof:

                           (a)  By the mutual written consent of the
Board of Directors of Parent or the Purchaser and the Board of Directors of the
Company.

                           (b)  By either of the Board of Directors
of the Company or the Board of Directors of Parent or the
Purchaser:

                           (i) if (x) the Offer shall have expired without any
         Shares being purchased therein or (y) the Purchaser shall not have
         accepted for payment any Shares pursuant to the Offer by August 24,
         1997; provided, however, that the right to terminate this Agreement
         under this Section 7.1(b)(i) shall not be available to any party whose
         failure to fulfill any obligation under this Agreement has been the
         cause of, or resulted in, the failure of Parent or the Purchaser, as
         the case may be, to purchase the Shares pursuant to the Offer on or
         prior to such date; or

                           (ii) if any Governmental Entity shall have issued an
         order, decree or ruling or taken any other action (which order,
         decree, ruling or other action the parties hereto shall use their best
         efforts to lift), which permanently restrains, enjoins or otherwise
         prohibits the acceptance for payment of, or payment for, Shares
         pursuant to the Offer or the Merger and such order, decree, ruling or
         other action shall have become final and non-appealable.

                           (c)  By the Board of Directors of the
Company:

                           (i) if Parent, the Purchaser or any of their
         affiliates shall have failed to commence the Offer on or prior to five
         business days following the date of the initial public announcement of
         the


                                                 55




    
<PAGE>




         Offer; provided, that the Company may not terminate this Agreement
         pursuant to this Section 7.1(c)(i) if the Company is at such time in
         material breach of its obligations under this Agreement;

                           (ii) in connection with entering into a definitive
         agreement in accordance with Section 5.4(b), provided it has complied
         with all provisions thereof, including the notice provisions therein,
         and that it makes simultaneous payment of the Termination Fee; or

                           (iii) if Parent or the Purchaser shall have breached
         in any material respect any of their respective representations,
         warranties, covenants or other agreements contained in this Agreement,
         which breach cannot be or has not been cured within 30 days after the
         giving of written notice to Parent or the Purchaser, as applicable.

                           (d)  By the Board of Directors of Parent
         or the Purchaser:

                           (i) if, due to an occurrence, not involving a breach
         by Parent or the Purchaser of their obligations hereunder, which makes
         it impossible to satisfy any of the conditions set forth in Annex A
         hereto, Parent, the Purchaser, or any of their affiliates shall have
         failed to commence the Offer on or prior to five business days
         following the date of the initial public announcement of the Offer;

                           (ii) if prior to the purchase of Shares pursuant to
         the Offer, the Company shall have breached any representation,
         warranty, covenant or other agreement contained in this Agreement
         which (A) would give rise to the failure of a condition set forth in
         paragraph (f) or (g) of Annex A hereto and (B) cannot be or has not
         been cured within 30 days after the giving of written notice to the
         Company; or

                           (iii) if either Parent or the Purchaser is entitled
         to terminate the Offer as a result of the occurrence of any event set
         forth in paragraph (e) of Annex A hereto.



                                                 56




    
<PAGE>




                  Section 7.2 Effect of Termination. In the event of the
termination of this Agreement pursuant to its terms, written notice thereof
shall forthwith be given to the other party or parties specifying the provision
hereof pursuant to which such termination is made, and this Agreement shall
forthwith become null and void, and there shall be no liability on the part of
the Parent or the Company except (A) for fraud or for breach of this Agreement
prior to such termination and (B) as set forth in Section 8.1.


                                  ARTICLE VIII

                                 MISCELLANEOUS

                  Section 8.1 Fees and Expenses. (a) Except as contemplated by
this Agreement, including Section 8.1(b) hereof, all costs and expenses
incurred in connection with this Agreement and the consummation of the
transactions contemplated hereby shall be paid by the party incurring such
expenses.

                           (b)  If (x) the Board of Directors of the
Company shall terminate this Agreement pursuant to Section 7.1(c)(ii), (y) the
Board of Directors of Parent or the Purchaser shall terminate this Agreement
pursuant to Section 7.1(d)(iii) hereof, or (z) prior to the termination of this
Agreement (other than by the Board of Directors of the Company pursuant to
Section 7.1(c)(i) or 7.1(c)(iii)), an Acquisition Proposal shall have been made
and within one year of such termination, the Company enters into an agreement
with respect to, approves or recommends or takes any action to facilitate an
Acquisition Proposal with the person making such original Acquisition Proposal
and at a price and on terms at least as favorable to the stockholders of the
Company as the Offer and the Merger and such later Acquisition Proposal is
consummated, the Company shall pay to Parent (concurrently with such
termination, in the case of clauses (x) or (y) above, and not later than the
consummation of such later Acquisition Proposal, in the case of clause (z)
above) an amount equal to $4,000,000 (the "Termination Fee"); provided that no
Termination Fee shall be payable if the Purchaser or Parent was in material
breach of its representations, warranties or obligations under this Agreement
at the time of its termination.


                                                 57




    
<PAGE>





                  Section 8.2 Amendment and Modification. Subject to applicable
law, this Agreement may be amended, modified and supplemented in any and all
respects, whether before or after any vote of the stockholders of the Company
contemplated hereby, by written agreement of the parties hereto, by action
taken by their respective Boards of Directors (which in the case of the Company
shall include approvals as contemplated in Section 1.3(b)), at any time prior
to the Closing Date with respect to any of the terms contained herein;
provided, however, that after the approval of this Agreement by the
stockholders of the Company, no such amendment, modification or supplement
shall reduce the amount or change the form of the Merger Consideration.

                  Section 8.3 Nonsurvival of Representations and Warranties.
None of the representations and warranties in this Agreement or in any
schedule, instrument or other document delivered pursuant to this Agreement
shall survive the Effective Time.

                  Section 8.4 Notices. All notices and other communications
hereunder shall be in writing and shall be deemed given if delivered
personally, telecopied (which is confirmed) or sent by an overnight courier
service, such as Federal Express, to the parties at the following addresses (or
at such other address for a party as shall be specified by like notice):

                  (a)      if to Parent or the Purchaser, to:

                           Applied Materials, Inc.
                           Attention:  Joseph J. Sweeney
                           Telephone No.: (408) 748-5420
                           Telecopy No.: (408) 563-4635

                           with a copy to:

                           Skadden, Arps, Slate, Meagher & Flom LLP
                           919 Third Avenue
                           New York, New York 10022
                           Attention:  David Fox, Esq.
                           Telephone No.: (212) 735-3000
                           Telecopy No.:  (212) 735-2000

                           and



                                                 58




    
<PAGE>




                  (b)      if to the Company, to:

                           Opal, Inc.
                           3203 Scott Boulevard
                           Santa Clara, CA 95054
                           Attention: Israel Niv
                           Telephone No.:  (408) 727-6060
                           Telecopy No.:   (408) 727-6332

                           with a copy to:

                           Goodwin, Procter & Hoar LLP
                           Exchange Place
                           53 State Street
                           Boston, Massachusetts  02109
                           Attention:  Thomas P. Storer, P.C.
                           Telephone No.:  (617) 570-1145
                           Telecopy No.:   (617) 523-1231

                           and

                           Goldfarb, Levy, Eran & Co.
                           Eliahu House
                           2 Ibn Gvirol Street
                           Tel Aviv 64077
                           Israel
                           Attention:   Yehuda M. Levy, Adv.; Marc
                                        A. Rabin, Adv.; and Shirin
                                        Halpern-Herzog, Adv.
                           Telephone No.:  (972-3) 695-4343
                           Telecopy No.:   (972-3) 695-4344


                  Section 8.5 Interpretation. When a reference is made in this
Agreement to Sections, such reference shall be to a Section of this Agreement
unless otherwise indicated. Whenever the words "include", "includes" or
"including" are used in this Agreement they shall be deemed to be followed by
the words "without limitation". As used in this Agreement, (a) the term
"affiliate(s)" shall have the meaning set forth in Rule l2b-2 of the Exchange
Act, and (b) the term "Company's knowledge" means the actual knowledge after
due inquiry of any of Rafi Yizhar, Henry Schwartzbaum or Israel Niv, provided
that none of the foregoing individuals shall have any personal liability to the
Parent or the Purchaser by reason of the foregoing.


                                                 59




    
<PAGE>





                  Section 8.6 Counterparts. This Agreement may be executed in
one or more counterparts, each of which shall be considered one and the same
agreement and shall become effective when two or more counterparts have been
signed by each of the parties and delivered to the other parties.

                  Section 8.7 Entire Agreement; No Third Party Beneficiaries.
This Agreement and the Confidentiality Agreement (including the documents and
the instruments referred to herein and therein): (a) constitute the entire
agreement and supersedes all prior agreements and understandings, both written
and oral, among the parties with respect to the subject matter hereof, and (b)
except as provided in Sections 2.4 and 5.9 is not intended to confer upon any
person other than the parties hereto any rights or remedies hereunder.

                  Section 8.8 Severability. Any term or provision of this
Agreement that is held by a court of competent jurisdiction or other authority
to be invalid, void or unenforceable in any situation in any jurisdiction shall
not affect the validity or enforceability of the remaining terms and provisions
hereof or the validity or enforceability of the offending term or provision in
any other situation or in any other jurisdiction. If the final judgment of a
court of competent jurisdiction or other authority declares that any term or
provision hereof is invalid, void or unenforceable, the parties agree that the
court making such determination shall have the power to reduce the scope,
duration, area or applicability of the term or provision, to delete specific
words or phrases, or to replace any invalid, void or unenforceable term or
provision with a term or provision that is valid and enforceable and that comes
closest to expressing the intention of the invalid or unenforceable term or
provision.

                  Section 8.9 Governing Law. This Agreement shall be governed
by and construed in accordance with the laws of the State of Delaware without
giving effect to the principles of conflicts of law thereof.

                  Section 8.10 Assignment. Neither this Agreement nor any of
the rights, interests or obligations hereunder shall be assigned by any of the
parties hereto (whether by operation of law or otherwise) without the


                                                 60




    
<PAGE>




prior written consent of the other parties, except that the Purchaser may
assign, in its sole discretion, any or all of its rights, interests and
obligations hereunder to Parent or to any direct or indirect wholly owned
Subsidiary of Parent. Subject to the preceding sentence, this Agreement will be
binding upon, inure to the benefit of and be enforceable by the parties and
their respective successors and assigns.

                  Section 8.11 Transfer and Similar Taxes. Notwithstanding any
other provision of this Agreement to the contrary, each of the Company's
stockholders shall be responsible for the payment of any sales, use, privilege,
transfer, documentary, gains, stamp, duties, recording and similar Taxes and
fees (including any penalties, interest and additions to such fees) incurred in
connection with such stockholder's sale of Shares to the Purchaser pursuant to
this Agreement and for the accurate filing of all necessary Tax Returns and
other documentation with respect to any transfer Tax.


                                                 61




    
<PAGE>




                  IN WITNESS WHEREOF, Parent, the Purchaser and the Company
have caused this Agreement to be signed by their respective officers thereunto
duly authorized as of the date first written above.


                                                 APPLIED MATERIALS, INC.


                                  By: /s/ James C. Morgan
                                     --------------------------------------
                                     Name:  James C. Morgan
                                     Title: Chairman and Chief Executive Officer


                                  ORION CORP. I


                                  By: /s/ Joseph J. Sweeney
                                     --------------------------------------
                                     Name:  Joseph J. Sweeney
                                     Title: Vice President


                                  OPAL, INC.


                                  By: /s/ Mendy Erad
                                     --------------------------------------
                                     Name:  Mendy Erad
                                     Title: Chairman of the Board

                                  By: /s/ Rafi Yizhar
                                     --------------------------------------
                                     Name:  Rafi Yizhar
                                     Title: President and Chief Executive
                                            Officer




    
<PAGE>




                                                                        ANNEX A



                  Certain Conditions of the Offer. Notwithstanding any other
provisions of the Offer, and in addition to (and not in limitation of) the
Purchaser's rights to extend and amend the Offer at any time in its sole
discretion (subject to the provisions of the Merger Agreement), the Purchaser
shall not be required to accept for payment or, subject to any applicable rules
and regulations of the SEC, including Rule 14e-1(c) under the Exchange Act
(relating to the Purchaser's obligation to pay for or return tendered Shares
promptly after termination or withdrawal of the Offer), pay for, and may delay
the acceptance for payment of or, subject to the restriction referred to above,
the payment for, any tendered Shares, and may terminate or amend the Offer as
to any Shares not then paid for, if (i) any applicable waiting period under the
HSR Act has not expired or terminated, (ii) the Minimum Condition has not been
satisfied, (iii) the approval of the Offer and the Merger by the Israeli
Investments Center shall not have been obtained, (iv) any applicable waiting
period under the Israeli Restrictive Trade Practices Act of 1988 has not
expired or terminated, (v) the approval of the Offer and the Merger by the
Israeli Office of Chief Scientist shall not have been obtained, (vi) the
exemption by the Israeli Securities Authority from the registration and
prospectus delivery requirements of the Israeli Securities laws for the
issuance of the Parent Options pursuant to Section 2.4(a) shall not have been
obtained or (vii) at any time on or after the date of the Merger Agreement and
before the time of acceptance for payment for any such Shares, any of the
following events shall occur or shall be determined by the Purchaser to have
occurred:

                           (a)  there shall be threatened or pending any
suit, action or proceeding by any Governmental Entity against the Purchaser,
Parent, the Company or any Subsidiary of the Company (i) seeking to prohibit or
impose any material limitations on Parent's or the Purchaser's ownership or
operation (or that of any of their respective Subsidiaries or affiliates) of
all or a material portion of their or the Company's businesses or assets, or to
compel Parent or the Purchaser or their respective Subsidiaries and affiliates
to dispose of or hold separate any material portion of the business or assets
of the Company or Parent and their respective Subsidiaries, in each case taken
as a whole, (ii) challenging the acquisi-


                                                     1




    
<PAGE>




tion by Parent or the purchaser of any Shares under the Offer or pursuant to
the Stockholder Agreements, seeking to restrain or prohibit the making or
consummation of the Offer or the Merger or the performance of any of the other
transactions contemplated by this Agreement or the Stockholder Agreements
(including the voting provisions thereunder), or seeking to obtain from the
Company, Parent or the Purchaser any damages that are material in relation to
the Company and its Subsidiaries taken as a whole, (iii) seeking to impose
material limitations on the ability of the Purchaser, or render the Purchaser
unable, to accept for payment, pay for or purchase some or all of the Shares
pursuant to the Offer and the Merger, (iv) seeking to impose material
limitations on the ability of the Purchaser or Parent effectively to exercise
full rights of ownership of the Shares, including, without limitation, the
right to vote the Shares purchased by it on all matters properly presented to
the Company's stockholders, or (v) which otherwise is reasonably likely to have
a material adverse affect on the consolidated financial condition, businesses
or results of operations of the Company and its Subsidiaries, taken as a whole;

                           (b)  there shall be any statute, rule, regula-
tion, judgment, order or injunction enacted, entered, enforced, promulgated, or
deemed applicable, pursuant to an authoritative interpretation by or on behalf
of a Government Entity, to the Offer or the Merger, or any other action shall
be taken by any Governmental Entity, other than the application to the Offer or
the Merger of applicable waiting periods under HSR Act, that is reasonably
likely to result, directly or indirectly, in any of the consequences referred
to in clauses (i) through (iv) of paragraph (a) above;

                           (c)  there shall have occurred (i) any general
suspension of trading in, or limitation on prices for, securities on the New
York Stock Exchange or in the NASDAQ National Market System, for a period in
excess of 24 hours (excluding suspensions or limitations resulting solely from
physical damage or interference with such exchanges not related to market
conditions), (ii) a declaration of a banking moratorium or any suspension of
payments in respect of banks in the United States (whether or not mandatory),
(iii) a commencement of a war, armed hostilities or other international or
national calamity directly or indirectly involving the United States or
involving Israel and, in the case of armed hostilities involving Israel,
having, or which could reasonably be expected to have, a substantial continuing
general effect on business and financial conditions in Isra-


                                                     2




    
<PAGE>




el, (iv) any limitation (whether or not mandatory) by any United States or
Israeli governmental authority on the extension of credit generally by banks or
other financial institutions, or (v) a change in general financial bank or
capital market conditions which materially and adversely affects the ability of
financial institutions in the United States and in Israel to extend credit or
syndicate loans or (vi) in the case of any of the foregoing existing at the
time of the commencement of the Offer, a material acceleration or worsening
thereof;

                           (d)      there shall have occurred any material
adverse change (or any development that, insofar as reasonably can be foreseen,
is reasonable likely to result in any material adverse change) in the
consolidated financial condition, businesses, results of operations or
prospects of the Company and its Subsidiaries, taken as a whole, other than any
such change which relates to general conditions in the economy or in the
Company's industry or arises solely from the Company's execution and delivery
of this Agreement;

                           (e)(i)  the Board of Directors of the Company
or any committee thereof shall have withdrawn or modified in a manner adverse
to Parent or the Purchaser its approval or recommendation of the Offer, the
Merger or this Agreement, or approved or recommended any Acquisition Proposal
or (ii) the Company shall have entered into any agreement with respect to any
Superior Proposal in accordance with Section 5.4(b) of this Agreement;

                           (f)      any of the representations and warranties
of the Company set forth in this Agreement that are qualified as to materiality
shall not be true and correct and any such representations and warranties that
are not so qualified shall not be true and correct in any material respect, in
each case (i) as of the date referred to in any representation or warranty
which addresses matters as of a particular date, or (ii) as to all other
representations and warranties, as of the date of this Agreement and as of the
scheduled expiration of the Offer;

                           (g)      the Company shall have failed to perform
in any material respect any material obligation or to comply in any material
respect with any material agreement or covenant of the Company to be performed
or complied with by it under this Agreement; or



                                                     3




    
<PAGE>



                           (h)      the Agreement shall have been terminated
in accordance with its terms;

which in the reasonable good faith judgment of Parent or the Purchaser, in any
such case, and regardless of the circumstances (including any action or
inaction by Parent or the Purchaser) giving rise to such condition makes it
inadvisable to proceed with the Offer and/or with such acceptance for payment
of or payment for Shares.

                  The foregoing conditions are for the sole benefit of Parent
and the Purchaser and may be waived by Parent or the Purchaser, in whole or in
part at any time and from time to time in the sole discretion of Parent or the
Purchaser. The failure by Parent or the Purchaser at any time to exercise any
of the foregoing rights shall not be deemed a waiver of any such right and each
such right shall be deemed an ongoing right which may be asserted at any time
and from time to time.

                                                    4


                             STOCKHOLDER AGREEMENT


                  AGREEMENT, dated as of November 24, 1996, among Applied
Materials, Inc., a Delaware corporation ("Parent"), Orion Corp. I, a Delaware
corporation and a wholly owned subsidiary of Parent (the "Purchaser"), and Rafi
Yizhar (the "Stockholder").

                              W I T N E S S E T H:

                  WHEREAS, concurrently with the execution and delivery of this
Agreement, Parent, the Purchaser and Opal, Inc., a Delaware corporation (the
"Company"), have entered into an Agreement and Plan of Merger (as such
agreement may hereafter be amended from time to time, the "Merger Agreement"),
pursuant to which Purchaser will be merged with and into the Company (the
"Merger");

                  WHEREAS, in furtherance of the Merger, Parent and the Company
desire that as soon as practicable (and not later than five business days)
after the execution and delivery of the Merger Agreement, the Purchaser shall
commence a cash tender offer (the "Offer") to purchase at a price of $18.50 per
share all outstanding shares of Company Common Stock (as defined in Section 1
hereof) including all of the Shares (as defined in Section 2 hereof)
beneficially owned by the Stockholder; and

                  WHEREAS, as an inducement and a condition to entering into
the Merger Agreement, Parent has required that the Stockholder agree, and the
Stockholder has agreed, to enter into this Agreement;

                  NOW, THEREFORE, in consideration of the foregoing and the
mutual representations, warranties, covenants and agreements contained herein,
the parties hereto agree as follows:

                  1.  Definitions.  For purposes of this Agree-
ment:

                  (a) "Beneficially Own" or "Beneficial Ownership" with respect
to any securities shall mean having "beneficial ownership" of such securities
(as determined pursuant to Rule 13d-3 under the Securities Exchange Act






    
<PAGE>




of 1934, as amended (the "Exchange Act")), including pursuant to any agreement,
arrangement or understanding, whether or not in writing. Without duplicative
counting of the same securities by the same holder, securities Beneficially
Owned by a Person shall include securities Beneficially Owned by all other
Persons with whom such Person would constitute a "group" as within the meaning
of Section 13(d)(3) of the Exchange Act.

                  (b)      "Company Common Stock" shall mean at any
time the Common Stock, $.01 par value, of the Company.

                  (c)      "Person" shall mean an individual, corpo-
ration, partnership, joint venture, association, trust,
unincorporated organization or other entity.

                  (d)      Capitalized terms used and not defined
herein have the respective meanings ascribed to them in
the Merger Agreement.

                  2.       Tender of Shares.

                  (a) In order to induce Parent and the Purchaser to enter into
the Merger Agreement, the Stockholder hereby agrees to validly tender (or cause
the record owner of such shares to validly tender), and not to withdraw,
pursuant to and in accordance with the terms of the Offer, not later than the
fifth business day after commencement of the Offer pursuant to Section 1.1 of
the Merger Agreement and Rule 14d-2 under the Exchange Act, the number of
shares of Company Common Stock set forth opposite such Stockholder's name on
Schedule I hereto (the "Existing Shares", and together with any shares acquired
by such Stockholder in any capacity after the date hereof and prior to the
termination of this Agreement whether upon the exercise of Company Options or
by means of purchase, dividend, distribution or otherwise, the "Shares"), all
of which are Beneficially Owned by such Stockholder. The Stockholder hereby
acknowledges and agrees that Parent's and the Purchaser's obligation to accept
for payment and pay for the Shares in the Offer, including the Shares
Beneficially Owned by such Stockholder, is subject to the terms and conditions
of the Offer.

                  (b)      The transfer by the Stockholder of the
Shares to Purchaser in the Offer shall pass to and uncon-


                                                  2




    
<PAGE>




ditionally vest in the Purchaser good and valid title to the Shares, free and
clear of all Encumbrances.

                  (c) The Stockholder hereby permits Parent and the Purchaser
to publish and disclose in the Offer Documents and, if approval of the
Company's stockholders is required under applicable law, the Proxy Statement
(including all documents and schedules filed with the SEC) his identity and
ownership of the Company Common Stock and the nature of his commitments,
arrangements and understandings under this Agreement.

                  3.       Options.

                  (a) Exercise of Stock Option. In order to induce Parent and
the Purchaser to enter into the Merger Agreement, the Stockholder hereby grants
to Parent an irrevocable option (a "Stock Option") to purchase such
Stockholder's Shares (the "Option Shares") at an amount (the "Purchase Price")
equal to the Offer Price. If (i) the Offer is terminated, abandoned or
withdrawn by Parent or the Purchaser (whether due to the failure of any of the
conditions thereto or otherwise), other than at a time when Parent or the
Purchaser is in material breach of the terms of the Merger Agreement, or (ii)
the Merger Agreement is terminated in accordance with its terms, other than a
termination pursuant to Section 7.1(c)(i) or 7.1(c)(iii), each Stock Option
shall, in any such case, become exercisable, in whole but not in part, upon the
first to occur of any such event and remain exercisable in whole until the date
which is 60 days after the date of the occurrence of such event (the "60 Day
Period"), so long as: (i) all waiting periods under the Hart-Scott-Rodino
Antitrust Improvements Act of 1976, as amended (the "HSR Act"), required for
the purchase of the Option Shares upon such exercise shall have expired or been
waived; (ii) all other applicable consents of any Governmental Entity required
for the purchase or sale of the Option Shares upon such exercise and identified
on Schedule 5(c) attached hereto (if applicable) shall have been granted or
otherwise satisfied; and (iii) there shall not be in effect any preliminary
injunction or other order issued by any Governmental Entity prohibiting the
exercise of the Stock Option pursuant to this Agreement; provided that if (i)
all HSR Act waiting periods shall not have expired or been waived, (ii) all
other applicable consents of any Governmental Entity required for the


                                                  3




    
<PAGE>




purchase or sale of the Option Shares and identified on Schedule 5(c)
attached hereto (if applicable) shall not have been granted or otherwise
satisfied, or (iii) there shall be in effect any such injunction or order, in
each case on the expiration of the 60 Day Period, the 60 Day Period shall be
extended until 5 business days after the later of (A) the date of expiration or
waiver of all HSR Act waiting periods, (B) the grant or other satisfaction of
such required consents, and (C) the date of removal or lifting of such
injunction or order; provided, however, that in no event shall the Stock Option
be exercisable after the date which is six months after the date on which the
Stock Option first becomes exercisable; provided, further, that the Stock
Option shall terminate if any Governmental Entity shall issue an order, decree
or ruling or take any other action (which order, decree, ruling or other action
the parties hereto shall use their best efforts to lift), which permanently
restrains, enjoins or otherwise prohibits Parent's exercise of the Stock Option
or the sale of the Option Shares to Parent by the Stockholder. In the event
that Parent wishes to exercise a Stock Option, Parent shall send a written
notice (the "Notice") to the Stockholder identifying the place and date (not
less than two nor more than 10 business days from the date of the Notice) for
the closing of such purchase.

                  (b) Resale of Option Shares. If, within 12 months following
the acquisition by Parent of the Option Shares, Parent or any of its affiliates
sells, transfers or otherwise disposes of any or all of the Option Shares to
any third party (other than to an affiliate of Parent) (a "Subsequent Sale")
and realizes a Profit (as defined below) from such Subsequent Sale, then Parent
shall pay to the Stockholder an amount equal to 95% of the Profit promptly upon
receipt of the proceeds from such Subsequent Sale. For purposes of this Section
3(b), "Profit" shall mean (A) the amount of the excess, if any, of (x) the
aggregate consideration received by Parent or its affiliates in connection with
a Subsequent Sale over (y) the product of (i) the number of Shares sold,
transferred or disposed of multiplied by (ii) the Purchase Price less (B) any
taxes or any other payment of any nature due or payable by Parent with respect
to the amount specified in clause (A), other than Parent's or the Purchaser's
expenses incurred in connection with the negotiation, execution and delivery of
this Agreement and the Merger


                                                  4




    
<PAGE>




Agreement. In the event the consideration received by Parent in a Subsequent
Sale is other than cash, the Stockholder shall be entitled to the same form of
consideration as received by Parent in such Subsequent Sale or, at Parent's
election, an amount in cash equal to the fair market value of such other
consideration that the Stockholder would have been entitled to pursuant to this
Section 3(b).

                  4.       Additional Agreements.

                  (a) Voting Agreement. The Stockholder shall, at any meeting
of the holders of Company Common Stock, however called, or in connection with
any written consent of the holders of Company Common Stock, vote (or cause to
be voted) the Shares (if any) then held of record or Beneficially Owned by such
Stockholder, (i) in favor of the Merger, the execution and delivery by the
Company of the Merger Agreement and the approval of the terms thereof and each
of the other actions contemplated by the Merger Agreement and this Agreement
and any actions required in furtherance thereof and hereof; and (ii) against
any Acquisition Proposal and against any action or agreement that would impede,
frustrate, prevent or nullify this Agreement, or result in a breach in any
respect of any covenant, representation or warranty or any other obligation or
agreement of the Company under the Merger Agreement or which would result in
any of the conditions set forth in Annex A to the Merger Agreement or set forth
in Article VI of the Merger Agreement not being fulfilled.

                  (b) No Inconsistent Arrangements. The Stockholder hereby
covenants and agrees that, except as contemplated by this Agreement and the
Merger Agreement, it shall not (i) transfer (which term shall include, without
limitation, any sale, gift, pledge or other disposition), or consent to any
transfer of, any or all of such Stockholder's Shares, Company Options or any
interest therein, (ii) enter into any contract, option or other agreement or
understanding with respect to any transfer of any or all of such Shares,
Company Options or any interest therein, (iii) grant any proxy,
power-of-attorney or other authorization in or with respect to such Shares or
Company Options, (iv) deposit such Shares or Company Options into a voting
trust or enter into a voting agreement or arrangement with respect to such
Shares or Compa-


                                                  5




    
<PAGE>




ny Options, or (v) take any other action that would in any way restrict, limit
or interfere with the performance of its obligations hereunder or the
transactions contemplated hereby or by the Merger Agreement.

                  (c)      Grant of Irrevocable Proxy; Appointment of
Proxy.

                  (i) The Stockholder hereby irrevocably grants to, and
appoints, Parent and Nancy H. Handel and Joseph J. Sweeney, or either of them,
in their respective capacities as officers of Parent, and any individual who
shall hereafter succeed to any such office of Parent, and each of them
individually, such Stockholder's proxy and attorney-in-fact (with full power of
substitution), for and in the name, place and stead of such Stockholder, to
vote such Stockholder's Shares, or grant a consent or approval in respect of
the Shares in favor of the various transactions contemplated by the Merger
Agreement (the "Transactions") and against any Acquisition Proposal.

                  (ii) The Stockholder represents that any proxies heretofore
given in respect of such Stockholder's Shares are not irrevocable, and that any
such proxies are hereby revoked.

                  (iii) The Stockholder understands and acknowledges that
Parent is entering into the Merger Agreement in reliance upon such
Stockholder's execution and delivery of this Agreement. The Stockholder hereby
affirms that the irrevocable proxy set forth in this Section 4(c) is given in
connection with the execution of the Merger Agreement, and that such
irrevocable proxy is given to secure the performance of the duties of such
Stockholder under this Agreement. The Stockholder hereby further affirms that
the irrevocable proxy is coupled with an interest and may under no
circumstances be revoked. The Stockholder hereby ratifies and confirms all that
such irrevocable proxy may lawfully do or cause to be done by virtue hereof.
Such irrevocable proxy is executed and intended to be irrevocable in accordance
with the provisions of Section 212(e) of the Delaware General Corporation Law.

                  (d)      No Solicitation.  The Stockholder hereby
agrees, in its or his capacity as a stockholder of the Company, that neither
such Stockholder nor any of its


                                                  6




    
<PAGE>




Subsidiaries or affiliates shall (and such Stockholder shall use its best
efforts to cause its officers, directors, employees, representatives and agents,
including, but not limited to, investment bankers, attorneys and accountants,
not to), directly or indirectly, encourage, solicit, participate in or initiate
discussions or negotiations with, or provide any information to, any
corporation, partnership, person or other entity or group (other than Parent,
any of its affiliates or representatives) concerning any Acquisition Proposal.
The Stockholder will immediately cease any existing activities, discussions or
negotiations with any parties conducted heretofore with respect to any
Acquisition Proposal. The Stockholder will immediately communicate to Parent
the terms of any proposal, discussion, negotiation or inquiry such Stockholder,
in its or his capacity as a stockholder of the Company, receives (and will
disclose any written materials received by such Stockholder, in its or his
capacity as a stockholder of the Company, in connection with such proposal,
discussion, negotiation or inquiry) and the identity of the party making such
proposal or inquiry which it may receive in respect of any such transaction.

                  (e) Company Options. If the Stockholder holds Company Options
to acquire shares of Company Common Stock, he shall, if requested by the
Company, consent to the cancellation or substitution of his Company Options in
accordance with the terms of the Merger Agreement and shall execute all
appropriate documentation in connection with such cancellation or substitution.

                  (f) Best Reasonable Efforts. Subject to the terms and
conditions of this Agreement, each of the parties hereto agrees to use its best
reasonable efforts to take, or cause to be taken, all actions, and to do, or
cause to be done, all things necessary, proper or advisable under applicable
laws and regulations to consummate and make effective the transactions
contemplated by this Agreement and the Merger Agreement. Each party shall
promptly consult with the other and provide any necessary information and
material with respect to all filings made by such party with any Governmental
Entity in connection with this Agreement and the Merger Agreement and the
transactions contemplated hereby and thereby.



                                                  7




    
<PAGE>




                  (g)      Waiver of Appraisal Rights.  The Stockholder hereby
waives any rights of appraisal or rights to dissent from the Merger that it or
he may have.

                  (h)      Acquisition of Remaining Shares. Parent agrees that,
in the event that within three years following Parent's exercise of the Stock
Option, Parent, the Purchaser or any of their Subsidiaries acquires any addi-
tional shares of Company Common Stock from, or pursuant to an offer made to all
of the Company's stockholders, whether by merger, consolidation, tender offer
or other similar transaction, the price paid per share of Company Common Stock
shall be no less than the Purchase Price.

                  5.       Representations and Warranties of the Stockholder.
The Stockholder hereby represents and warrants to Parent as follows:

                  (a) Ownership of Shares. Such Stockholder is the record and
Beneficial Owner of the Existing Shares, as set forth on Schedule I. On the
date hereof, the Existing Shares constitute all of the Shares owned of record
or Beneficially Owned by such Stockholder. Such Stockholder has sole voting
power and sole power to issue instructions with respect to the matters set
forth in Sections 2, 3 and 4 hereof, sole power of disposition, sole power of
conversion, sole power to demand appraisal rights and sole power to agree to
all of the matters set forth in this Agreement, in each case with respect to
all of the Existing Shares with no limitations, qualifications or restrictions
on such rights, subject to applicable securities laws and the terms of this
Agreement.

                  (b) Power; Binding Agreement. Such Stockholder has the legal
capacity, power and authority to enter into and perform all of such
Stockholder's obligations under this Agreement. The execution, delivery and
performance of this Agreement by such Stockholder will not violate any other
agreement to which such Stockholder is a party including, without limitation,
any voting agreement, proxy arrangement, pledge agreement, shareholders
agreement or voting trust. This Agreement has been duly and validly executed
and delivered by such Stockholder and constitutes a valid and binding agreement
of such Stockholder, enforceable against such Stockholder in accordance with
its terms. There is no beneficiary or holder of a voting trust certificate or
other interest of


                                                  8




    
<PAGE>




any trust of which such Stockholder is a trustee whose consent is required for
the execution and delivery of this Agreement or the consummation by such
Stockholder of the transactions contemplated hereby.

                  (c) No Conflicts. Except for filings under the HSR Act, the
Exchange Act and as set forth on Schedule 5(c) attached hereto, (i) no filing
with, and no permit, authorization, consent or approval of, any Governmental
Entity for the execution of this Agreement by such Stockholder and the
consummation by such Stockholder of the transactions contemplated hereby and
(ii) none of the execution and delivery of this Agreement by such Stockholder,
the consummation by such Stockholder of the transactions contemplated hereby or
compliance by such Stockholder with any of the provisions hereof shall (A)
conflict with or result in any breach of any organizational documents
applicable to the Stockholder, (B) result in a violation or breach of, or
constitute (with or without notice or lapse of time or both) a default (or give
rise to any third party right of termination, cancellation, material
modification or acceleration) under any of the terms, conditions or provisions
of any note, loan agreement, bond, mortgage, indenture, license, contract,
commitment, arrangement, understanding, agreement or other instrument or
obligation of any kind to which such Stockholder is a party or by which such
Stockholder or any of its properties or assets may be bound, or (C) violate any
order, writ, injunction, decree, judgment, order, statute, rule or regulation
applicable to such Stockholder or any of its properties or assets.

                  (d) No Encumbrances. Except as permitted by this Agreement,
the Existing Shares and the certificates representing such Shares are now, and
at all times during the term hereof will be, held by such Stockholder, or by a
nominee or custodian for the benefit of such Stockholder, free and clear of all
Encumbrances, proxies, voting trusts or agreements, understandings or
arrangements or any other rights whatsoever, except for any such Encumbrances
or proxies arising hereunder.

                  (e)      No Finder's Fees.  No broker, investment
banker, financial advisor or other person is entitled to any broker's,
finder's, financial adviser's or other similar fee or commission in connection
with the transac-


                                                  9




    
<PAGE>




tions contemplated hereby based upon arrangements made by or on behalf of such
Stockholder.

                  (f) Reliance by Parent. The Stockholder understands and
acknowledges that Parent is entering into, and causing Purchaser to enter into,
the Merger Agreement in reliance upon such Stockholder's execution and delivery
of this Agreement.

                  6.       Representations and Warranties of Parent and the
Purchaser.  Each of Parent and the Purchaser hereby represents and warrants to
the Stockholder as follows:

                  (a) Power; Binding Agreement. Parent and the Purchaser each
has the corporate power and authority to enter into and perform all of its
obligations under this Agreement. The execution, delivery and performance of
this Agreement by each of Parent and the Purchaser will not violate any other
agreement to which either of them is a party. This Agreement has been duly and
validly executed and delivered by each of Parent and the Purchaser and
constitutes a valid and binding agreement of each of Parent and the Purchaser,
enforceable against each of Parent and the Purchaser in accordance with its
terms.

                  (b) No Conflicts. Except for filings under the HSR Act and
the Exchange Act, (i) no filing with, and no permit, authorization, consent or
approval of, any Governmental Entity is necessary for the execution of this
Agreement by each of Parent and the Purchaser and the consummation by each of
Parent and the Purchaser of the transactions contemplated hereby and (ii) none
of the execution and delivery of this Agreement by each of Parent and the
Purchaser, the consummation by each of Parent and the Purchaser of the
transactions contemplated hereby or compliance by each of Parent and the
Purchaser with any of the provisions hereof shall (A) conflict with or result
in any breach of any organizational documents applicable to either of Parent or
the Purchaser, (B) result in a violation or breach of, or constitute (with or
without notice or lapse of time or both) a default (or give rise to any third
party right of termination, cancellation, material modification or
acceleration) under any of the terms, conditions or provisions of any note,
loan agreement, bond, mortgage, indenture, license, contract, commitment,
arrangement, understanding, agree-


                                                 10




    
<PAGE>




ment or other instrument or obligation of any kind to which either of Parent or
the Purchaser is a party or by which either of Parent or the Purchaser or any
of their properties or assets may be bound, or (C) violate any order, writ,
injunction, decree, judgment, order, statute, rule or regulation applicable to
either of Parent or the Purchaser or any of their properties or assets.

                  7. Further Assurances. From time to time, at the other
party's request and without further consideration, each party hereto shall
execute and deliver such additional documents and take all such further lawful
action as may be necessary or desirable to consummate and make effective, in
the most expeditious manner practicable, the transactions contemplated by this
Agreement.

                  8.       Stop Transfer.  The Stockholder shall not
request that the Company register the transfer (book-entry or otherwise) of any
certificate or uncertificated interest representing any of the Shares, unless
such transfer is made in compliance with this Agreement. In the event of a stock
dividend or distribution, or any change in the Company Common Stock by reason of
any stock dividend, split-up, recapitalization, combination, exchange of shares
or the like, the term "Shares" shall refer to and include the Shares as well as
all such stock dividends and distributions and any shares into which or for
which any or all of the Shares may be changed or exchanged.

                  9.       Termination.  Except as provided in Section 3 hereof,
the covenants, agreements and proxy shall terminate upon the termination of the
Merger Agreement in accordance with its terms.

                  10.      Miscellaneous.

                  (a) Entire Agreement. This Agreement constitutes the entire
agreement between the parties with respect to the subject matter hereof and
supersedes all other prior agreements and understandings, both written and
oral, between the parties with respect to the subject matter hereof.

                  (b)      Binding Agreement.  This Agreement and the
obligations hereunder shall attach to the Shares and shall be binding upon any
person or entity to which legal


                                                 11




    
<PAGE>




or beneficial ownership of such Shares shall pass, whether by operation of law
or otherwise, including, without limitation, a Stockholder's heirs, guardians,
administrators or successors. Notwithstanding any transfer of Shares, the
transferor shall remain liable for the performance of all obligations of the
transferor under this Agreement.

                  (c) Assignment. This Agreement shall not be assigned by
operation of law or otherwise without the prior written consent of the other
parties, provided that Parent may assign, in its sole discretion, its rights
and obligations hereunder to any direct or indirect wholly owned subsidiary of
Parent, but no such assignment shall relieve Parent of its obligations
hereunder if such assignee does not perform such obligations.

                  (d)      Amendments, Waivers, Etc.  This Agreement may not be
amended, changed, supplemented, waived or otherwise modified or terminated,
except upon the execution and delivery of a written agreement executed by the
parties hereto.

                  (e) Notices. All notices, requests, claims, demands and other
communications hereunder shall be in writing and shall be given (and shall be
deemed to have been duly received if given) by hand delivery or telecopy (with
a confirmation copy sent for next day delivery via courier service, such as
Federal Express), or by any courier service, such as Federal Express, providing
proof of delivery. All communications hereunder shall be delivered to the
respective parties at the following addresses:


         If to the
         Stockholder:               c/o Opal Technologies, Inc.
                                    Industrial Zone B
                                    POB 416
                                    Nes Ziona, Israel 70451
                                    Telephone No.: 972-8-938-3522
                                    Telecopy No.: 972-8-940-9902

         If to Parent or
         the Purchaser:             Applied Materials, Inc.
                                    3050 Bowers Avenue
                                    Santa Clara, CA 95405-3299


                                                 12




    
<PAGE>




                                    Attention: Joseph J. Sweeney
                                    Telephone No.: (408) 727-5555
                                    Telecopy No.: (408) 563-4635

         Copy to:                   Skadden, Arps, Slate,
                                      Meagher & Flom LLP
                                    919 Third Avenue
                                    New York, New York  10022
                                    Attention:  David Fox
                                    Telephone No.: (212) 735-3000
                                    Telecopy No.: (212) 735-2000


or to such other address as the person to whom notice is given may have
previously furnished to the others in writing in the manner set forth above.

                  (f) Severability. Whenever possible, each provision or
portion of any provision of this Agreement will be interpreted in such manner
as to be effective and valid under applicable law but if any provision or
portion of any provision of this Agreement is held to be invalid, illegal or
unenforceable in any respect under any applicable law or rule in any
jurisdiction, such invalidity, illegality or unenforceability will not affect
any other provision or portion of any provision in such jurisdiction, and this
Agreement will be reformed, construed and enforced in such jurisdiction as if
such invalid, illegal or unenforceable provision or portion of any provision
had never been contained herein.

                  (g) Specific Performance. Each of the parties hereto
recognizes and acknowledges that a breach by it of any covenants or agreements
contained in this Agreement will cause the other party to sustain damages for
which it would not have an adequate remedy at law for money damages, and
therefore in the event of any such breach the aggrieved party shall be entitled
to the remedy of specific performance of such covenants and agreements and
injunctive and other equitable relief in addition to any other remedy to which
it may be entitled, at law or in equity.

                  (h)      Remedies Cumulative.  All rights, powers and
remedies provided under this Agreement or otherwise available in respect hereof
at law or in equity shall be cumulative and not alternative, and the exercise
of any


                                                 13




    
<PAGE>




thereof by any party shall not preclude the simultaneous or later exercise of
any other such right, power or remedy by such party.

                  (i) No Waiver. The failure of any party hereto to exercise
any right, power or remedy provided under this Agreement or otherwise available
in respect hereof at law or in equity, or to insist upon compliance by any
other party hereto with its obligations hereunder, and any custom or practice
of the parties at variance with the terms hereof, shall not constitute a waiver
by such party of its right to exercise any such or other right, power or remedy
or to demand such compliance.

                  (j)      No Third Party Beneficiaries.  This Agreement is not
intended to be for the benefit of, and shall not be enforceable by, any person
or entity who or which is not a party hereto.

                  (k)      Governing Law.  This Agreement shall be governed and
construed in accordance with the laws of the State of Delaware, without giving
effect to the principles of conflicts of law thereof.

                  (l) Jurisdiction. Each party hereby irrevocably submits to
the exclusive jurisdiction of the Court of Chancery in the State of Delaware
and the United States District Court for the Southern District of New York in
any action, suit or proceeding arising in connection with this Agreement, and
agrees that any such action, suit or proceeding shall be brought only in such
court (and waives any objection based on forum non conveniens or any other
objection to venue therein). Each party hereto hereby waives any right to a
trial by jury in connection with any such action, suit or proceeding.

                  (m)      Descriptive Headings.  The descriptive headings used
herein are inserted for convenience of reference only and are not intended to
be part of or to affect the meaning or interpretation of this Agreement.

                  (n)      Counterparts.  This Agreement may be executed in
counterparts, each of which shall be deemed to be an original, but all of which,
taken together, shall constitute one and the same Agreement.


                                                 14




    
<PAGE>




                  IN WITNESS WHEREOF, Parent, the Purchaser and the Stockholder
have caused this Agreement to be duly executed as of the day and year first
above written.


                                            APPLIED MATERIALS, INC.


                                            By: /s/ James C. Morgan
                                               --------------------------------
                                            Name:  James C. Morgan
                                            Title: Chairman and Chief Executive
                                                   Officer


                                            ORION CORP. I


                                            By: /s/ Joseph J. Sweeney
                                               --------------------------------
                                            Name:  Joseph J. Sweeney
                                            Title: Vice President


                                            By: /s/ Rafi Yizhar
                                               --------------------------------
                                            Name: Rafi Yizhar

                                                 15




    
<PAGE>




                                   Schedule I



                                                          Number of Shares
                                                          and Company Options
Name of Stockholder                                       Beneficially Owned
- -------------------                                       ------------------

Rafi Yizhar                                                 101,878 Shares

                                                            148,572 Company
                                                                 Options



                                                 16


                             STOCKHOLDER AGREEMENT


                  AGREEMENT, dated as of November 24, 1996, among Applied
Materials, Inc., a Delaware corporation ("Parent"), Orion Corp. I, a Delaware
corporation and a wholly owned subsidiary of Parent (the "Purchaser"), and
Israel Niv (the "Stockholder").

                              W I T N E S S E T H:

                  WHEREAS, concurrently with the execution and delivery of this
Agreement, Parent, the Purchaser and Opal, Inc., a Delaware corporation (the
"Company"), have entered into an Agreement and Plan of Merger (as such
agreement may hereafter be amended from time to time, the "Merger Agreement"),
pursuant to which Purchaser will be merged with and into the Company (the
"Merger");

                  WHEREAS, in furtherance of the Merger, Parent and the Company
desire that as soon as practicable (and not later than five business days)
after the execution and delivery of the Merger Agreement, the Purchaser shall
commence a cash tender offer (the "Offer") to purchase at a price of $18.50 per
share all outstanding shares of Company Common Stock (as defined in Section 1
hereof) including all of the Shares (as defined in Section 2 hereof)
beneficially owned by the Stockholder; and

                  WHEREAS, as an inducement and a condition to entering into
the Merger Agreement, Parent has required that the Stockholder agree, and the
Stockholder has agreed, to enter into this Agreement;

                  NOW, THEREFORE, in consideration of the foregoing and the
mutual representations, warranties, covenants and agreements contained herein,
the parties hereto agree as follows:

                  1.  Definitions.  For purposes of this Agreement:

                  (a) "Beneficially Own" or "Beneficial Ownership" with respect
to any securities shall mean having "beneficial ownership" of such securities
(as determined pursuant to Rule 13d-3 under the Securities Exchange Act






    
<PAGE>




of 1934, as amended (the "Exchange Act")), including pursuant to any agreement,
arrangement or understanding, whether or not in writing. Without duplicative
counting of the same securities by the same holder, securities Beneficially
Owned by a Person shall include securities Beneficially Owned by all other
Persons with whom such Person would constitute a "group" as within the meaning
of Section 13(d)(3) of the Exchange Act.

                  (b)      "Company Common Stock" shall mean at any time the
Common Stock, $.01 par value, of the Company.

                  (c)      "Person" shall mean an individual, corporation,
partnership, joint venture, association, trust, unincorporated organization or
other entity.

                  (d)      Capitalized terms used and not defined herein have
the respective meanings ascribed to them in the Merger Agreement.

                  2.       Tender of Shares.

                  (a) In order to induce Parent and the Purchaser to enter into
the Merger Agreement, the Stockholder hereby agrees to validly tender (or cause
the record owner of such shares to validly tender), and not to withdraw,
pursuant to and in accordance with the terms of the Offer, not later than the
fifth business day after commencement of the Offer pursuant to Section 1.1 of
the Merger Agreement and Rule 14d-2 under the Exchange Act, the number of
shares of Company Common Stock set forth opposite such Stockholder's name on
Schedule I hereto (the "Existing Shares", and together with any shares acquired
by such Stockholder in any capacity after the date hereof and prior to the
termination of this Agreement whether upon the exercise of Company Options or
by means of purchase, dividend, distribution or otherwise, the "Shares"), all
of which are Beneficially Owned by such Stockholder. The Stockholder hereby
acknowledges and agrees that Parent's and the Purchaser's obligation to accept
for payment and pay for the Shares in the Offer, including the Shares
Beneficially Owned by such Stockholder, is subject to the terms and conditions
of the Offer.

                  (b)      The transfer by the Stockholder of the Shares to
Purchaser in the Offer shall pass to and uncon-


                                                  2




    
<PAGE>




ditionally vest in the Purchaser good and valid title to the Shares, free and
clear of all Encumbrances.

                  (c) The Stockholder hereby permits Parent and the Purchaser
to publish and disclose in the Offer Documents and, if approval of the
Company's stockholders is required under applicable law, the Proxy Statement
(including all documents and schedules filed with the SEC) his identity and
ownership of the Company Common Stock and the nature of his commitments,
arrangements and understandings under this Agreement.

                  3.       Options.

                  (a) Exercise of Stock Option. In order to induce Parent and
the Purchaser to enter into the Merger Agreement, the Stockholder hereby grants
to Parent an irrevocable option (a "Stock Option") to purchase such
Stockholder's Shares (the "Option Shares") at an amount (the "Purchase Price")
equal to the Offer Price. If (i) the Offer is terminated, abandoned or
withdrawn by Parent or the Purchaser (whether due to the failure of any of the
conditions thereto or otherwise), other than at a time when Parent or the
Purchaser is in material breach of the terms of the Merger Agreement, or (ii)
the Merger Agreement is terminated in accordance with its terms, other than a
termination pursuant to Section 7.1(c)(i) or 7.1(c)(iii), each Stock Option
shall, in any such case, become exercisable, in whole but not in part, upon the
first to occur of any such event and remain exercisable in whole until the date
which is 60 days after the date of the occurrence of such event (the "60 Day
Period"), so long as: (i) all waiting periods under the Hart-Scott-Rodino
Antitrust Improvements Act of 1976, as amended (the "HSR Act"), required for
the purchase of the Option Shares upon such exercise shall have expired or been
waived; (ii) all other applicable consents of any Governmental Entity required
for the purchase or sale of the Option Shares upon such exercise and identified
on Schedule 5(c) attached hereto (if applicable) shall have been granted or
otherwise satisfied; and (iii) there shall not be in effect any preliminary
injunction or other order issued by any Governmental Entity prohibiting the
exercise of the Stock Option pursuant to this Agreement; provided that if (i)
all HSR Act waiting periods shall not have expired or been waived, (ii) all
other applicable consents of any Governmental Entity required for the


                                                  3




    
<PAGE>




purchase or sale of the Option Shares and identified on Schedule 5(c)
attached hereto (if applicable) shall not have been granted or otherwise
satisfied, or (iii) there shall be in effect any such injunction or order, in
each case on the expiration of the 60 Day Period, the 60 Day Period shall be
extended until 5 business days after the later of (A) the date of expiration or
waiver of all HSR Act waiting periods, (B) the grant or other satisfaction of
such required consents, and (C) the date of removal or lifting of such
injunction or order; provided, however, that in no event shall the Stock Option
be exercisable after the date which is six months after the date on which the
Stock Option first becomes exercisable; provided, further, that the Stock
Option shall terminate if any Governmental Entity shall issue an order, decree
or ruling or take any other action (which order, decree, ruling or other action
the parties hereto shall use their best efforts to lift), which permanently
restrains, enjoins or otherwise prohibits Parent's exercise of the Stock Option
or the sale of the Option Shares to Parent by the Stockholder. In the event
that Parent wishes to exercise a Stock Option, Parent shall send a written
notice (the "Notice") to the Stockholder identifying the place and date (not
less than two nor more than 10 business days from the date of the Notice) for
the closing of such purchase.

                  (b) Resale of Option Shares. If, within 12 months following
the acquisition by Parent of the Option Shares, Parent or any of its affiliates
sells, transfers or otherwise disposes of any or all of the Option Shares to
any third party (other than to an affiliate of Parent) (a "Subsequent Sale")
and realizes a Profit (as defined below) from such Subsequent Sale, then Parent
shall pay to the Stockholder an amount equal to 95% of the Profit promptly upon
receipt of the proceeds from such Subsequent Sale. For purposes of this Section
3(b), "Profit" shall mean (A) the amount of the excess, if any, of (x) the
aggregate consideration received by Parent or its affiliates in connection with
a Subsequent Sale over (y) the product of (i) the number of Shares sold,
transferred or disposed of multiplied by (ii) the Purchase Price less (B) any
taxes or any other payment of any nature due or payable by Parent with respect
to the amount specified in clause (A), other than Parent's or the Purchaser's
expenses incurred in connection with the negotiation, execution and delivery of
this Agreement and the Merger


                                                  4




    
<PAGE>




Agreement. In the event the consideration received by Parent in a Subsequent
Sale is other than cash, the Stockholder shall be entitled to the same form of
consideration as received by Parent in such Subsequent Sale or, at Parent's
election, an amount in cash equal to the fair market value of such other
consideration that the Stockholder would have been entitled to pursuant to this
Section 3(b).

                  4.       Additional Agreements.

                  (a) Voting Agreement. The Stockholder shall, at any meeting
of the holders of Company Common Stock, however called, or in connection with
any written consent of the holders of Company Common Stock, vote (or cause to
be voted) the Shares (if any) then held of record or Beneficially Owned by such
Stockholder, (i) in favor of the Merger, the execution and delivery by the
Company of the Merger Agreement and the approval of the terms thereof and each
of the other actions contemplated by the Merger Agreement and this Agreement
and any actions required in furtherance thereof and hereof; and (ii) against
any Acquisition Proposal and against any action or agreement that would impede,
frustrate, prevent or nullify this Agreement, or result in a breach in any
respect of any covenant, representation or warranty or any other obligation or
agreement of the Company under the Merger Agreement or which would result in
any of the conditions set forth in Annex A to the Merger Agreement or set forth
in Article VI of the Merger Agreement not being fulfilled.

                  (b) No Inconsistent Arrangements. The Stockholder hereby
covenants and agrees that, except as contemplated by this Agreement and the
Merger Agreement, it shall not (i) transfer (which term shall include, without
limitation, any sale, gift, pledge or other disposition), or consent to any
transfer of, any or all of such Stockholder's Shares, Company Options or any
interest therein, (ii) enter into any contract, option or other agreement or
understanding with respect to any transfer of any or all of such Shares,
Company Options or any interest therein, (iii) grant any proxy,
power-of-attorney or other authorization in or with respect to such Shares or
Company Options, (iv) deposit such Shares or Company Options into a voting
trust or enter into a voting agreement or arrangement with respect to such
Shares or Compa-


                                                  5




    
<PAGE>




ny Options, or (v) take any other action that would in any way restrict, limit
or interfere with the performance of its obligations hereunder or the
transactions contemplated hereby or by the Merger Agreement.

                  (c)      Grant of Irrevocable Proxy; Appointment of
Proxy.

                  (i) The Stockholder hereby irrevocably grants to, and
appoints, Parent and Nancy H. Handel and Joseph J. Sweeney, or either of them,
in their respective capacities as officers of Parent, and any individual who
shall hereafter succeed to any such office of Parent, and each of them
individually, such Stockholder's proxy and attorney-in-fact (with full power of
substitution), for and in the name, place and stead of such Stockholder, to
vote such Stockholder's Shares, or grant a consent or approval in respect of
the Shares in favor of the various transactions contemplated by the Merger
Agreement (the "Transactions") and against any Acquisition Proposal.

                  (ii) The Stockholder represents that any proxies heretofore
given in respect of such Stockholder's Shares are not irrevocable, and that any
such proxies are hereby revoked.

                  (iii) The Stockholder understands and acknowledges that
Parent is entering into the Merger Agreement in reliance upon such
Stockholder's execution and delivery of this Agreement. The Stockholder hereby
affirms that the irrevocable proxy set forth in this Section 4(c) is given in
connection with the execution of the Merger Agreement, and that such
irrevocable proxy is given to secure the performance of the duties of such
Stockholder under this Agreement. The Stockholder hereby further affirms that
the irrevocable proxy is coupled with an interest and may under no
circumstances be revoked. The Stockholder hereby ratifies and confirms all that
such irrevocable proxy may lawfully do or cause to be done by virtue hereof.
Such irrevocable proxy is executed and intended to be irrevocable in accordance
with the provisions of Section 212(e) of the Delaware General Corporation Law.

                  (d)      No Solicitation.  The Stockholder hereby agrees, in
its or his capacity as a stockholder of the Company, that neither such
Stockholder nor any of its


                                                  6




    
<PAGE>




Subsidiaries or affiliates shall (and such Stockholder shall use its best
efforts to cause its officers, directors, employees, representatives and agents,
including, but not limited to, investment bankers, attorneys and accountants,
not to), directly or indirectly, encourage, solicit, participate in or initiate
discussions or negotiations with, or provide any information to, any
corporation, partnership, person or other entity or group (other than Parent,
any of its affiliates or representatives) concerning any Acquisition Proposal.
The Stockholder will immediately cease any existing activities, discussions or
negotiations with any parties conducted heretofore with respect to any
Acquisition Proposal. The Stockholder will immediately communicate to Parent
the terms of any proposal, discussion, negotiation or inquiry such Stockholder,
in its or his capacity as a stockholder of the Company, receives (and will
disclose any written materials received by such Stockholder, in its or his
capacity as a stockholder of the Company, in connection with such proposal,
discussion, negotiation or inquiry) and the identity of the party making such
proposal or inquiry which it may receive in respect of any such transaction.

                  (e) Company Options. If the Stockholder holds Company Options
to acquire shares of Company Common Stock, he shall, if requested by the
Company, consent to the cancellation or substitution of his Company Options in
accordance with the terms of the Merger Agreement and shall execute all
appropriate documentation in connection with such cancellation or substitution.

                  (f) Best Reasonable Efforts. Subject to the terms and
conditions of this Agreement, each of the parties hereto agrees to use its best
reasonable efforts to take, or cause to be taken, all actions, and to do, or
cause to be done, all things necessary, proper or advisable under applicable
laws and regulations to consummate and make effective the transactions
contemplated by this Agreement and the Merger Agreement. Each party shall
promptly consult with the other and provide any necessary information and
material with respect to all filings made by such party with any Governmental
Entity in connection with this Agreement and the Merger Agreement and the
transactions contemplated hereby and thereby.



                                                  7




    
<PAGE>




                  (g)      Waiver of Appraisal Rights.  The Stockholder hereby
waives any rights of appraisal or rights to dissent from the Merger that it or
he may have.

                  (h)      Acquisition of Remaining Shares.  Parent agrees that,
in the event that within three years following Parent's exercise of the Stock
Option, Parent, the Purchaser or any of their Subsidiaries acquires any addi-
tional shares of Company Common Stock from, or pursuant to an offer made to all
of the Company's stockholders, whether by merger, consolidation, tender offer
or other similar transaction, the price paid per share of Company Common Stock
shall be no less than the Purchase Price.

                  5.       Representations and Warranties of the Stockholder.
The Stockholder hereby represents and warrants to Parent as follows:

                  (a) Ownership of Shares. Such Stockholder is the record and
Beneficial Owner of the Existing Shares, as set forth on Schedule I. On the
date hereof, the Existing Shares constitute all of the Shares owned of record
or Beneficially Owned by such Stockholder. Such Stockholder has sole voting
power and sole power to issue instructions with respect to the matters set
forth in Sections 2, 3 and 4 hereof, sole power of disposition, sole power of
conversion, sole power to demand appraisal rights and sole power to agree to
all of the matters set forth in this Agreement, in each case with respect to
all of the Existing Shares with no limitations, qualifications or restrictions
on such rights, subject to applicable securities laws and the terms of this
Agreement.

                  (b) Power; Binding Agreement. Such Stockholder has the legal
capacity, power and authority to enter into and perform all of such
Stockholder's obligations under this Agreement. The execution, delivery and
performance of this Agreement by such Stockholder will not violate any other
agreement to which such Stockholder is a party including, without limitation,
any voting agreement, proxy arrangement, pledge agreement, shareholders
agreement or voting trust. This Agreement has been duly and validly executed
and delivered by such Stockholder and constitutes a valid and binding agreement
of such Stockholder, enforceable against such Stockholder in accordance with
its terms. There is no beneficiary or holder of a voting trust certificate or
other interest of


                                                  8




    
<PAGE>




any trust of which such Stockholder is a trustee whose consent is required for
the execution and delivery of this Agreement or the consummation by such
Stockholder of the transactions contemplated hereby.

                  (c) No Conflicts. Except for filings under the HSR Act, the
Exchange Act and as set forth on Schedule 5(c) attached hereto, (i) no filing
with, and no permit, authorization, consent or approval of, any Governmental
Entity for the execution of this Agreement by such Stockholder and the
consummation by such Stockholder of the transactions contemplated hereby and
(ii) none of the execution and delivery of this Agreement by such Stockholder,
the consummation by such Stockholder of the transactions contemplated hereby or
compliance by such Stockholder with any of the provisions hereof shall (A)
conflict with or result in any breach of any organizational documents
applicable to the Stockholder, (B) result in a violation or breach of, or
constitute (with or without notice or lapse of time or both) a default (or give
rise to any third party right of termination, cancellation, material
modification or acceleration) under any of the terms, conditions or provisions
of any note, loan agreement, bond, mortgage, indenture, license, contract,
commitment, arrangement, understanding, agreement or other instrument or
obligation of any kind to which such Stockholder is a party or by which such
Stockholder or any of its properties or assets may be bound, or (C) violate any
order, writ, injunction, decree, judgment, order, statute, rule or regulation
applicable to such Stockholder or any of its properties or assets.

                  (d) No Encumbrances. Except as permitted by this Agreement,
the Existing Shares and the certificates representing such Shares are now, and
at all times during the term hereof will be, held by such Stockholder, or by a
nominee or custodian for the benefit of such Stockholder, free and clear of all
Encumbrances, proxies, voting trusts or agreements, understandings or
arrangements or any other rights whatsoever, except for any such Encumbrances
or proxies arising hereunder.

                  (e) No Finder's Fees. No broker, investment banker, financial
advisor or other person is entitled to any broker's, finder's, financial
adviser's or other similar fee or commission in connection with the transac-


                                                  9




    
<PAGE>




tions contemplated hereby based upon arrangements made by or on behalf of such
Stockholder.

                  (f) Reliance by Parent. The Stockholder understands and
acknowledges that Parent is entering into, and causing Purchaser to enter into,
the Merger Agreement in reliance upon such Stockholder's execution and delivery
of this Agreement.

                  6.       Representations and Warranties of Parent and the
Purchaser.  Each of Parent and the Purchaser hereby represents and warrants to
the Stockholder as follows:

                  (a) Power; Binding Agreement. Parent and the Purchaser each
has the corporate power and authority to enter into and perform all of its
obligations under this Agreement. The execution, delivery and performance of
this Agreement by each of Parent and the Purchaser will not violate any other
agreement to which either of them is a party. This Agreement has been duly and
validly executed and delivered by each of Parent and the Purchaser and
constitutes a valid and binding agreement of each of Parent and the Purchaser,
enforceable against each of Parent and the Purchaser in accordance with its
terms.

                  (b) No Conflicts. Except for filings under the HSR Act and
the Exchange Act, (i) no filing with, and no permit, authorization, consent or
approval of, any Governmental Entity is necessary for the execution of this
Agreement by each of Parent and the Purchaser and the consummation by each of
Parent and the Purchaser of the transactions contemplated hereby and (ii) none
of the execution and delivery of this Agreement by each of Parent and the
Purchaser, the consummation by each of Parent and the Purchaser of the
transactions contemplated hereby or compliance by each of Parent and the
Purchaser with any of the provisions hereof shall (A) conflict with or result
in any breach of any organizational documents applicable to either of Parent or
the Purchaser, (B) result in a violation or breach of, or constitute (with or
without notice or lapse of time or both) a default (or give rise to any third
party right of termination, cancellation, material modification or
acceleration) under any of the terms, conditions or provisions of any note,
loan agreement, bond, mortgage, indenture, license, contract, commitment,
arrangement, understanding, agree-


                                                 10




    
<PAGE>




ment or other instrument or obligation of any kind to which either of Parent or
the Purchaser is a party or by which either of Parent or the Purchaser or any
of their properties or assets may be bound, or (C) violate any order, writ,
injunction, decree, judgment, order, statute, rule or regulation applicable to
either of Parent or the Purchaser or any of their properties or assets.

                  7. Further Assurances. From time to time, at the other
party's request and without further consideration, each party hereto shall
execute and deliver such additional documents and take all such further lawful
action as may be necessary or desirable to consummate and make effective, in
the most expeditious manner practicable, the transactions contemplated by this
Agreement.

                  8. Stop Transfer. The Stockholder shall not request that the
Company register the transfer (book-entry or otherwise) of any certificate or
uncertificated interest representing any of the Shares, unless such transfer is
made in compliance with this Agreement. In the event of a stock dividend or
distribution, or any change in the Company Common Stock by reason of any stock
dividend, split-up, recapitalization, combination, exchange of shares or the
like, the term "Shares" shall refer to and include the Shares as well as all
such stock dividends and distributions and any shares into which or for which
any or all of the Shares may be changed or exchanged.

                  9. Termination. Except as provided in Section 3 hereof, the
covenants, agreements and proxy shall terminate upon the termination of the
Merger Agreement in accordance with its terms.

                  10.      Miscellaneous.

                  (a) Entire Agreement. This Agreement constitutes the entire
agreement between the parties with respect to the subject matter hereof and
supersedes all other prior agreements and understandings, both written and
oral, between the parties with respect to the subject matter hereof.

                  (b) Binding Agreement. This Agreement and the obligations
hereunder shall attach to the Shares and shall be binding upon any person or
entity to which legal


                                                 11




    
<PAGE>




or beneficial ownership of such Shares shall pass, whether by operation of law
or otherwise, including, without limitation, a Stockholder's heirs, guardians,
administrators or successors. Notwithstanding any transfer of Shares, the
transferor shall remain liable for the performance of all obligations of the
transferor under this Agreement.

                  (c) Assignment. This Agreement shall not be assigned by
operation of law or otherwise without the prior written consent of the other
parties, provided that Parent may assign, in its sole discretion, its rights
and obligations hereunder to any direct or indirect wholly owned subsidiary of
Parent, but no such assignment shall relieve Parent of its obligations
hereunder if such assignee does not perform such obligations.

                  (d) Amendments, Waivers, Etc. This Agreement may not be
amended, changed, supplemented, waived or otherwise modified or terminated,
except upon the execution and delivery of a written agreement executed by the
parties hereto.

                  (e) Notices. All notices, requests, claims, demands and other
communications hereunder shall be in writing and shall be given (and shall be
deemed to have been duly received if given) by hand delivery or telecopy (with
a confirmation copy sent for next day delivery via courier service, such as
Federal Express), or by any courier service, such as Federal Express, providing
proof of delivery. All communications hereunder shall be delivered to the
respective parties at the following addresses:


         If to the
         Stockholder:               c/o Opal, Inc.
                                    3203 Scott Boulevard
                                    Santa Clara, CA 95054
                                    Telephone No.: (408) 727-6060
                                    Telecopy No.: (408) 727-6332

         If to Parent or
         the Purchaser:             Applied Materials, Inc.
                                    3050 Bowers Avenue
                                    Santa Clara, CA 95405-3299
                                    Attention: Joseph J. Sweeney


                                                 12




    
<PAGE>




                                    Telephone No.: (408) 727-5555
                                    Telecopy No.: (408) 563-4635

         Copy to:                   Skadden, Arps, Slate,
                                      Meagher & Flom LLP
                                    919 Third Avenue
                                    New York, New York  10022
                                    Attention:  David Fox
                                    Telephone No.: (212) 735-3000
                                    Telecopy No.: (212) 735-2000


or to such other address as the person to whom notice is given may have
previously furnished to the others in writing in the manner set forth above.

                  (f) Severability. Whenever possible, each provision or
portion of any provision of this Agreement will be interpreted in such manner
as to be effective and valid under applicable law but if any provision or
portion of any provision of this Agreement is held to be invalid, illegal or
unenforceable in any respect under any applicable law or rule in any
jurisdiction, such invalidity, illegality or unenforceability will not affect
any other provision or portion of any provision in such jurisdiction, and this
Agreement will be reformed, construed and enforced in such jurisdiction as if
such invalid, illegal or unenforceable provision or portion of any provision
had never been contained herein.

                  (g) Specific Performance. Each of the parties hereto
recognizes and acknowledges that a breach by it of any covenants or agreements
contained in this Agreement will cause the other party to sustain damages for
which it would not have an adequate remedy at law for money damages, and
therefore in the event of any such breach the aggrieved party shall be entitled
to the remedy of specific performance of such covenants and agreements and
injunctive and other equitable relief in addition to any other remedy to which
it may be entitled, at law or in equity.

                  (h) Remedies Cumulative. All rights, powers and remedies
provided under this Agreement or otherwise available in respect hereof at law
or in equity shall be cumulative and not alternative, and the exercise of any
thereof by any party shall not preclude the simultaneous


                                                 13




    
<PAGE>




or later exercise of any other such right, power or remedy by such party.

                  (i) No Waiver. The failure of any party hereto to exercise
any right, power or remedy provided under this Agreement or otherwise available
in respect hereof at law or in equity, or to insist upon compliance by any
other party hereto with its obligations hereunder, and any custom or practice
of the parties at variance with the terms hereof, shall not constitute a waiver
by such party of its right to exercise any such or other right, power or remedy
or to demand such compliance.

                  (j) No Third Party Beneficiaries. This Agreement is not
intended to be for the benefit of, and shall not be enforceable by, any person
or entity who or which is not a party hereto.

                  (k) Governing Law. This Agreement shall be governed and
construed in accordance with the laws of the State of Delaware, without giving
effect to the principles of conflicts of law thereof.

                  (l) Jurisdiction. Each party hereby irrevocably submits to
the exclusive jurisdiction of the Court of Chancery in the State of Delaware
and the United States District Court for the Southern District of New York in
any action, suit or proceeding arising in connection with this Agreement, and
agrees that any such action, suit or proceeding shall be brought only in such
court (and waives any objection based on forum non conveniens or any other
objection to venue therein). Each party hereto hereby waives any right to a
trial by jury in connection with any such action, suit or proceeding.

                  (m) Descriptive Headings. The descriptive headings used
herein are inserted for convenience of reference only and are not intended to
be part of or to affect the meaning or interpretation of this Agreement.

                  (n) Counterparts. This Agreement may be executed in
counterparts, each of which shall be deemed to be an original, but all of
which, taken together, shall constitute one and the same Agreement.


                                                 14




    
<PAGE>




                  IN WITNESS WHEREOF, Parent, the Purchaser and the Stockholder
have caused this Agreement to be duly executed as of the day and year first
above written.


                                            APPLIED MATERIALS, INC.


                                            By: /s/ James C. Morgan
                                               -------------------------------
                                            Name:  James C. Morgan
                                            Title: Chairman and Chief Executive
                                                   Officer


                                            ORION CORP. I


                                            By: /s/ Joseph J. Sweeney
                                               -------------------------------
                                            Name:  Joseph J. Sweeney
                                            Title: Vice President

                                            By: /s/ Israel Niv
                                               -------------------------------
                                               Name:  Israel Niv



                                                 15




    
<PAGE>




                                   Schedule I



                                                          Number of Shares
                                                          and Company Options
Name of Stockholder                                       Beneficially Owned
- -------------------                                       ------------------


Israel Niv                                                 101,878 Shares

                                                           107,143 Company
                                                                 Options




                                                 16




                             STOCKHOLDER AGREEMENT


                  AGREEMENT, dated as of November 24, 1996, among Applied
Materials, Inc., a Delaware corporation ("Parent"), Orion Corp. I, a Delaware
corporation and a wholly owned subsidiary of Parent (the "Purchaser"), and Clal
Electronics Industries Ltd. (the "Stockholder").

                              W I T N E S S E T H:

                  WHEREAS, concurrently with the execution and delivery of this
Agreement, Parent, the Purchaser and Opal, Inc., a Delaware corporation (the
"Company"), have entered into an Agreement and Plan of Merger (as such
agreement may hereafter be amended from time to time, the "Merger Agreement"),
pursuant to which Purchaser will be merged with and into the Company (the
"Merger");

                  WHEREAS, in furtherance of the Merger, Parent and the Company
desire that as soon as practicable (and not later than five business days)
after the execution and delivery of the Merger Agreement, the Purchaser shall
commence a cash tender offer (the "Offer") to purchase at a price of $18.50 per
share all outstanding shares of Company Common Stock (as defined in Section 1
hereof) including all of the Shares (as defined in Section 2 hereof)
beneficially owned by the Stockholder; and

                  WHEREAS, as an inducement and a condition to entering into
the Merger Agreement, Parent has required that the Stockholder agree, and the
Stockholder has agreed, to enter into this Agreement;

                  NOW, THEREFORE, in consideration of the foregoing and the
mutual representations, warranties, covenants and agreements contained herein,
the parties hereto agree as follows:

                  1.  Definitions.  For purposes of this Agreement:

                  (a) "Beneficially Own" or "Beneficial Ownership" with respect
to any securities shall mean having "beneficial ownership" of such securities
(as determined pursuant to Rule 13d-3 under the Securities Exchange Act






    
<PAGE>




of 1934, as amended (the "Exchange Act")), including pursuant to any agreement,
arrangement or understanding, whether or not in writing. Without duplicative
counting of the same securities by the same holder, securities Beneficially
Owned by a Person shall include securities Beneficially Owned by all other
Persons with whom such Person would constitute a "group" as within the meaning
of Section 13(d)(3) of the Exchange Act.

                  (b)      "Company Common Stock" shall mean at any
time the Common Stock, $.01 par value, of the Company.

                  (c)      "Person" shall mean an individual, corporation,
partnership, joint venture, association, trust, unincorporated organization or
other entity.

                  (d)      Capitalized terms used and not defined herein have
the respective meanings ascribed to them in the Merger Agreement.

                  2.       Tender of Shares.

                  (a) In order to induce Parent and the Purchaser to enter into
the Merger Agreement, the Stockholder hereby agrees to validly tender (or cause
the record owner of such shares to validly tender), and not to withdraw,
pursuant to and in accordance with the terms of the Offer, not later than the
fifth business day after commencement of the Offer pursuant to Section 1.1 of
the Merger Agreement and Rule 14d-2 under the Exchange Act, the number of
shares of Company Common Stock set forth opposite such Stockholder's name on
Schedule I hereto (the "Existing Shares", and together with any shares acquired
by such Stockholder in any capacity after the date hereof and prior to the
termination of this Agreement whether upon the exercise of Company Options or
by means of purchase, dividend, distribution or otherwise, the "Shares"), all
of which are Beneficially Owned by such Stockholder. The Stockholder hereby
acknowledges and agrees that Parent's and the Purchaser's obligation to accept
for payment and pay for the Shares in the Offer, including the Shares
Beneficially Owned by such Stockholder, is subject to the terms and conditions
of the Offer.

                  (b)      The transfer by the Stockholder of the Shares to
Purchaser in the Offer shall pass to and uncon-


                                                  2




    
<PAGE>




ditionally vest in the Purchaser good and valid title to the Shares, free and
clear of all Encumbrances.

                  (c) The Stockholder hereby permits Parent and the Purchaser
to publish and disclose in the Offer Documents and, if approval of the
Company's stockholders is required under applicable law, the Proxy Statement
(including all documents and schedules filed with the SEC) its identity and
ownership of the Company Common Stock and the nature of its commitments,
arrangements and understandings under this Agreement.

                  3.       Options.

                  (a) Exercise of Stock Option. In order to induce Parent and
the Purchaser to enter into the Merger Agreement, the Stockholder hereby grants
to Parent an irrevocable option (a "Stock Option") to purchase such
Stockholder's Shares (the "Option Shares") at an amount (the "Purchase Price")
equal to the Offer Price. If (i) the Offer is terminated, abandoned or
withdrawn by Parent or the Purchaser (whether due to the failure of any of the
conditions thereto or otherwise), other than at a time when Parent or the
Purchaser is in material breach of the terms of the Merger Agreement, or (ii)
the Merger Agreement is terminated in accordance with its terms, other than a
termination pursuant to Section 7.1(c)(i) or 7.1(c)(iii), each Stock Option
shall, in any such case, become exercisable, in whole but not in part, upon the
first to occur of any such event and remain exercisable in whole until the date
which is 60 days after the date of the occurrence of such event (the "60 Day
Period"), so long as: (i) all waiting periods under the Hart-Scott-Rodino
Antitrust Improvements Act of 1976, as amended (the "HSR Act"), required for
the purchase of the Option Shares upon such exercise shall have expired or been
waived; (ii) all other applicable consents of any Governmental Entity required
for the purchase or sale of the Option Shares upon such exercise and identified
on Schedule 5(c) attached hereto (if applicable) shall have been granted or
otherwise satisfied; and (iii) there shall not be in effect any preliminary
injunction or other order issued by any Governmental Entity prohibiting the
exercise of the Stock Option pursuant to this Agreement; provided that if (i)
all HSR Act waiting periods shall not have expired or been waived, (ii) all
other applicable consents of any Governmental Entity required for the


                                                  3




    
<PAGE>




purchase or sale of the Option Shares and identified on Schedule 5(c)
attached hereto (if applicable) shall not have been granted or otherwise
satisfied, or (iii) there shall be in effect any such injunction or order, in
each case on the expiration of the 60 Day Period, the 60 Day Period shall be
extended until 5 business days after the later of (A) the date of expiration or
waiver of all HSR Act waiting periods, (B) the grant or other satisfaction of
such required consents, and (C) the date of removal or lifting of such
injunction or order; provided, however, that in no event shall the Stock Option
be exercisable after the date which is six months after the date on which the
Stock Option first becomes exercisable; provided, further, that the Stock
Option shall terminate if any Governmental Entity shall issue an order, decree
or ruling or take any other action (which order, decree, ruling or other action
the parties hereto shall use their best efforts to lift), which permanently
restrains, enjoins or otherwise prohibits Parent's exercise of the Stock Option
or the sale of the Option Shares to Parent by the Stockholder. In the event
that Parent wishes to exercise a Stock Option, Parent shall send a written
notice (the "Notice") to the Stockholder identifying the place and date (not
less than two nor more than 10 business days from the date of the Notice) for
the closing of such purchase.

                  (b) Resale of Option Shares. If, within 12 months following
the acquisition by Parent of the Option Shares, Parent or any of its affiliates
sells, transfers or otherwise disposes of any or all of the Option Shares to
any third party (other than to an affiliate of Parent) (a "Subsequent Sale")
and realizes a Profit (as defined below) from such Subsequent Sale, then Parent
shall pay to the Stockholder an amount equal to 95% of the Profit promptly upon
receipt of the proceeds from such Subsequent Sale. For purposes of this Section
3(b), "Profit" shall mean (A) the amount of the excess, if any, of (x) the
aggregate consideration received by Parent or its affiliates in connection with
a Subsequent Sale over (y) the product of (i) the number of Shares sold,
transferred or disposed of multiplied by (ii) the Purchase Price less (B) any
taxes or any other payment of any nature due or payable by Parent with respect
to the amount specified in clause (A), other than Parent's or the Purchaser's
expenses incurred in connection with the negotiation, execution and delivery of
this Agreement and the Merger


                                                  4




    
<PAGE>




Agreement. In the event the consideration received by Parent in a Subsequent
Sale is other than cash, the Stockholder shall be entitled to the same form of
consideration as received by Parent in such Subsequent Sale or, at Parent's
election, an amount in cash equal to the fair market value of such other
consideration that the Stockholder would have been entitled to pursuant to this
Section 3(b).

                  4.       Additional Agreements.

                  (a) Voting Agreement. The Stockholder shall, at any meeting
of the holders of Company Common Stock, however called, or in connection with
any written consent of the holders of Company Common Stock, vote (or cause to
be voted) the Shares (if any) then held of record or Beneficially Owned by such
Stockholder, (i) in favor of the Merger, the execution and delivery by the
Company of the Merger Agreement and the approval of the terms thereof and each
of the other actions contemplated by the Merger Agreement and this Agreement
and any actions required in furtherance thereof and hereof; and (ii) against
any Acquisition Proposal and against any action or agreement that would impede,
frustrate, prevent or nullify this Agreement, or result in a breach in any
respect of any covenant, representation or warranty or any other obligation or
agreement of the Company under the Merger Agreement or which would result in
any of the conditions set forth in Annex A to the Merger Agreement or set forth
in Article VI of the Merger Agreement not being fulfilled.

                  (b) No Inconsistent Arrangements. The Stockholder hereby
covenants and agrees that, except as contemplated by this Agreement and the
Merger Agreement, it shall not (i) transfer (which term shall include, without
limitation, any sale, gift, pledge or other disposition), or consent to any
transfer of, any or all of such Stockholder's Shares, Company Options or any
interest therein, (ii) enter into any contract, option or other agreement or
understanding with respect to any transfer of any or all of such Shares,
Company Options or any interest therein, (iii) grant any proxy,
power-of-attorney or other authorization in or with respect to such Shares or
Company Options, (iv) deposit such Shares or Company Options into a voting
trust or enter into a voting agreement or arrangement with respect to such
Shares or Compa-


                                                  5




    
<PAGE>




ny Options, or (v) take any other action that would in any way restrict, limit
or interfere with the performance of its obligations hereunder or the
transactions contemplated hereby or by the Merger Agreement.

                  (c)      Grant of Irrevocable Proxy; Appointment of
Proxy.

                  (i) The Stockholder hereby irrevocably grants to, and
appoints, Parent and Nancy H. Handel and Joseph J. Sweeney, or either of them,
in their respective capacities as officers of Parent, and any individual who
shall hereafter succeed to any such office of Parent, and each of them
individually, such Stockholder's proxy and attorney-in-fact (with full power of
substitution), for and in the name, place and stead of such Stockholder, to
vote such Stockholder's Shares, or grant a consent or approval in respect of
the Shares in favor of the various transactions contemplated by the Merger
Agreement (the "Transactions") and against any Acquisition Proposal.

                  (ii) The Stockholder represents that any proxies heretofore
given in respect of such Stockholder's Shares are not irrevocable, and that any
such proxies are hereby revoked.

                  (iii) The Stockholder understands and acknowledges that
Parent is entering into the Merger Agreement in reliance upon such
Stockholder's execution and delivery of this Agreement. The Stockholder hereby
affirms that the irrevocable proxy set forth in this Section 4(c) is given in
connection with the execution of the Merger Agreement, and that such
irrevocable proxy is given to secure the performance of the duties of such
Stockholder under this Agreement. The Stockholder hereby further affirms that
the irrevocable proxy is coupled with an interest and may under no
circumstances be revoked. The Stockholder hereby ratifies and confirms all that
such irrevocable proxy may lawfully do or cause to be done by virtue hereof.
Such irrevocable proxy is executed and intended to be irrevocable in accordance
with the provisions of Section 212(e) of the Delaware General Corporation Law.

                  (d)      No Solicitation.  The Stockholder hereby agrees, in
its or his capacity as a stockholder of the Company, that neither such
Stockholder nor any of its


                                                  6




    
<PAGE>




Subsidiaries or affiliates shall (and such Stockholder shall use its best
efforts to cause its officers, directors, employees, representatives and agents,
including, but not limited to, investment bankers, attorneys and accountants,
not to), directly or indirectly, encourage, solicit, participate in or initiate
discussions or negotiations with, or provide any information to, any
corporation, partnership, person or other entity or group (other than Parent,
any of its affiliates or representatives) concerning any Acquisition Proposal.
The Stockholder will immediately cease any existing activities, discussions or
negotiations with any parties conducted heretofore with respect to any
Acquisition Proposal. The Stockholder will immediately communicate to Parent the
terms of any proposal, discussion, negotiation or inquiry such Stockholder, in
its or his capacity as a stockholder of the Company, receives (and will disclose
any written materials received by such Stockholder, in its or his capacity as a
stockholder of the Company, in connection with such proposal, discussion,
negotiation or inquiry) and the identity of the party making such proposal or
inquiry which it may receive in respect of any such transaction.

                  (e) Company Options. If the Stockholder holds Company Options
to acquire shares of Company Common Stock, he shall, if requested by the
Company, consent to the cancellation or substitution of his Company Options in
accordance with the terms of the Merger Agreement and shall execute all
appropriate documentation in connection with such cancellation or substitution.

                  (f) Best Reasonable Efforts. Subject to the terms and
conditions of this Agreement, each of the parties hereto agrees to use its best
reasonable efforts to take, or cause to be taken, all actions, and to do, or
cause to be done, all things necessary, proper or advisable under applicable
laws and regulations to consummate and make effective the transactions
contemplated by this Agreement and the Merger Agreement. Each party shall
promptly consult with the other and provide any necessary information and
material with respect to all filings made by such party with any Governmental
Entity in connection with this Agreement and the Merger Agreement and the
transactions contemplated hereby and thereby.



                                                  7




    
<PAGE>




                  (g)      Waiver of Appraisal Rights.  The Stockholder hereby
waives any rights of appraisal or rights to dissent from the Merger that it or
he may have.

                  (h)      Acquisition of Remaining Shares.  Parent agrees that,
in the event that within three years following Parent's exercise of the Stock
Option, Parent, the Purchaser or any of their Subsidiaries acquires any addi-
tional shares of Company Common Stock from, or pursuant to an offer made to all
of the Company's stockholders, whether by merger, consolidation, tender offer
or other similar transaction, the price paid per share of Company Common Stock
shall be no less than the Purchase Price.

                  5.       Representations and Warranties of the Stockholder.
The Stockholder hereby represents and warrants to Parent as follows:

                  (a) Ownership of Shares. Such Stockholder is the record and
Beneficial Owner of the Existing Shares, as set forth on Schedule I. On the
date hereof, the Existing Shares constitute all of the Shares owned of record
or Beneficially Owned by such Stockholder. Such Stockholder has sole voting
power and sole power to issue instructions with respect to the matters set
forth in Sections 2, 3 and 4 hereof, sole power of disposition, sole power of
conversion, sole power to demand appraisal rights and sole power to agree to
all of the matters set forth in this Agreement, in each case with respect to
all of the Existing Shares with no limitations, qualifications or restrictions
on such rights, subject to applicable securities laws and the terms of this
Agreement.

                  (b) Power; Binding Agreement. Such Stockholder has the legal
capacity, power and authority to enter into and perform all of such
Stockholder's obligations under this Agreement. The execution, delivery and
performance of this Agreement by such Stockholder will not violate any other
agreement to which such Stockholder is a party including, without limitation,
any voting agreement, proxy arrangement, pledge agreement, shareholders
agreement or voting trust. This Agreement has been duly and validly executed
and delivered by such Stockholder and constitutes a valid and binding agreement
of such Stockholder, enforceable against such Stockholder in accordance with
its terms. There is no beneficiary or holder of a voting trust certificate or
other interest of


                                                  8




    
<PAGE>




any trust of which such Stockholder is a trustee whose consent is required for
the execution and delivery of this Agreement or the consummation by such
Stockholder of the transactions contemplated hereby.

                  (c) No Conflicts. Except for filings under the HSR Act, the
Exchange Act and as set forth on Schedule 5(c) attached hereto, (i) no filing
with, and no permit, authorization, consent or approval of, any Governmental
Entity for the execution of this Agreement by such Stockholder and the
consummation by such Stockholder of the transactions contemplated hereby and
(ii) none of the execution and delivery of this Agreement by such Stockholder,
the consummation by such Stockholder of the transactions contemplated hereby or
compliance by such Stockholder with any of the provisions hereof shall (A)
conflict with or result in any breach of any organizational documents
applicable to the Stockholder, (B) result in a violation or breach of, or
constitute (with or without notice or lapse of time or both) a default (or give
rise to any third party right of termination, cancellation, material
modification or acceleration) under any of the terms, conditions or provisions
of any note, loan agreement, bond, mortgage, indenture, license, contract,
commitment, arrangement, understanding, agreement or other instrument or
obligation of any kind to which such Stockholder is a party or by which such
Stockholder or any of its properties or assets may be bound, or (C) violate any
order, writ, injunction, decree, judgment, order, statute, rule or regulation
applicable to such Stockholder or any of its properties or assets.

                  (d) No Encumbrances. Except as permitted by this Agreement,
the Existing Shares and the certificates representing such Shares are now, and
at all times during the term hereof will be, held by such Stockholder, or by a
nominee or custodian for the benefit of such Stockholder, free and clear of all
Encumbrances, proxies, voting trusts or agreements, understandings or
arrangements or any other rights whatsoever, except for any such Encumbrances
or proxies arising hereunder.

                  (e) No Finder's Fees. No broker, investment banker, financial
advisor or other person is entitled to any broker's, finder's, financial
adviser's or other similar fee or commission in connection with the transac-


                                                  9




    
<PAGE>




tions contemplated hereby based upon arrangements made by or on behalf of such
Stockholder.

                  (f) Reliance by Parent. The Stockholder understands and
acknowledges that Parent is entering into, and causing Purchaser to enter into,
the Merger Agreement in reliance upon such Stockholder's execution and delivery
of this Agreement.

                  6.       Representations and Warranties of Parent
and the Purchaser.  Each of Parent and the Purchaser
hereby represents and warrants to the Stockholder as
follows:

                  (a) Power; Binding Agreement. Parent and the Purchaser each
has the corporate power and authority to enter into and perform all of its
obligations under this Agreement. The execution, delivery and performance of
this Agreement by each of Parent and the Purchaser will not violate any other
agreement to which either of them is a party. This Agreement has been duly and
validly executed and delivered by each of Parent and the Purchaser and
constitutes a valid and binding agreement of each of Parent and the Purchaser,
enforceable against each of Parent and the Purchaser in accordance with its
terms.

                  (b) No Conflicts. Except for filings under the HSR Act and
the Exchange Act, (i) no filing with, and no permit, authorization, consent or
approval of, any Governmental Entity is necessary for the execution of this
Agreement by each of Parent and the Purchaser and the consummation by each of
Parent and the Purchaser of the transactions contemplated hereby and (ii) none
of the execution and delivery of this Agreement by each of Parent and the
Purchaser, the consummation by each of Parent and the Purchaser of the
transactions contemplated hereby or compliance by each of Parent and the
Purchaser with any of the provisions hereof shall (A) conflict with or result
in any breach of any organizational documents applicable to either of Parent or
the Purchaser, (B) result in a violation or breach of, or constitute (with or
without notice or lapse of time or both) a default (or give rise to any third
party right of termination, cancellation, material modification or
acceleration) under any of the terms, conditions or provisions of any note,
loan agreement, bond, mortgage, indenture, license, contract, commitment,
arrangement, understanding, agree-


                                                 10




    
<PAGE>




ment or other instrument or obligation of any kind to which either of Parent or
the Purchaser is a party or by which either of Parent or the Purchaser or any
of their properties or assets may be bound, or (C) violate any order, writ,
injunction, decree, judgment, order, statute, rule or regulation applicable to
either of Parent or the Purchaser or any of their properties or assets.

                  7. Further Assurances. From time to time, at the other
party's request and without further consideration, each party hereto shall
execute and deliver such additional documents and take all such further lawful
action as may be necessary or desirable to consummate and make effective, in
the most expeditious manner practicable, the transactions contemplated by this
Agreement.

                  8. Stop Transfer. The Stockholder shall not request that the
Company register the transfer (book-entry or otherwise) of any certificate or
uncertificated interest representing any of the Shares, unless such transfer is
made in compliance with this Agreement. In the event of a stock dividend or
distribution, or any change in the Company Common Stock by reason of any stock
dividend, split-up, recapitalization, combination, exchange of shares or the
like, the term "Shares" shall refer to and include the Shares as well as all
such stock dividends and distributions and any shares into which or for which
any or all of the Shares may be changed or exchanged.

                  9. Termination. Except as provided in Section 3 hereof, the
covenants, agreements and proxy shall terminate upon the termination of the
Merger Agreement in accordance with its terms.

                  10.      Miscellaneous.

                  (a) Entire Agreement. This Agreement constitutes the entire
agreement between the parties with respect to the subject matter hereof and
supersedes all other prior agreements and understandings, both written and
oral, between the parties with respect to the subject matter hereof.

                  (b) Binding Agreement. This Agreement and the obligations
hereunder shall attach to the Shares and shall be binding upon any person or
entity to which legal


                                                 11




    
<PAGE>




or beneficial ownership of such Shares shall pass, whether by operation of law
or otherwise, including, without limitation, a Stockholder's heirs, guardians,
administrators or successors. Notwithstanding any transfer of Shares, the
transferor shall remain liable for the performance of all obligations of the
transferor under this Agreement.

                  (c) Assignment. This Agreement shall not be assigned by
operation of law or otherwise without the prior written consent of the other
parties, provided that Parent may assign, in its sole discretion, its rights
and obligations hereunder to any direct or indirect wholly owned subsidiary of
Parent, but no such assignment shall relieve Parent of its obligations
hereunder if such assignee does not perform such obligations.

                  (d) Amendments, Waivers, Etc. This Agreement may not be
amended, changed, supplemented, waived or otherwise modified or terminated,
except upon the execution and delivery of a written agreement executed by the
parties hereto.

                  (e) Notices. All notices, requests, claims, demands and other
communications hereunder shall be in writing and shall be given (and shall be
deemed to have been duly received if given) by hand delivery or telecopy (with
a confirmation copy sent for next day delivery via courier service, such as
Federal Express), or by any courier service, such as Federal Express, providing
proof of delivery. All communications hereunder shall be delivered to the
respective parties at the following addresses:


         If to the
         Stockholder:               Clal Electronics Industries Ltd.
                                    5 Druyanov Street
                                    Tel Aviv 63143, Israel
                                    Telephone No.: 972-3-526-3333
                                    Telecopy No.: 972-3-528-5380

         If to Parent or
         the Purchaser:             Applied Materials, Inc.
                                    3050 Bowers Avenue
                                    Santa Clara, CA 95405-3299
                                    Attention: Joseph J. Sweeney


                                                 12




    
<PAGE>




                                    Telephone No.: (408) 727-5555
                                    Telecopy No.:(408) 563-4635

         Copy to:                   Skadden, Arps, Slate,
                                      Meagher & Flom LLP
                                    919 Third Avenue
                                    New York, New York  10022
                                    Attention:  David Fox
                                    Telephone No.: (212) 735-3000
                                    Telecopy No.: (212) 735-2000


or to such other address as the person to whom notice is given may have
previously furnished to the others in writing in the manner set forth above.

                  (f) Severability. Whenever possible, each provision or
portion of any provision of this Agreement will be interpreted in such manner
as to be effective and valid under applicable law but if any provision or
portion of any provision of this Agreement is held to be invalid, illegal or
unenforceable in any respect under any applicable law or rule in any
jurisdiction, such invalidity, illegality or unenforceability will not affect
any other provision or portion of any provision in such jurisdiction, and this
Agreement will be reformed, construed and enforced in such jurisdiction as if
such invalid, illegal or unenforceable provision or portion of any provision
had never been contained herein.

                  (g) Specific Performance. Each of the parties hereto
recognizes and acknowledges that a breach by it of any covenants or agreements
contained in this Agreement will cause the other party to sustain damages for
which it would not have an adequate remedy at law for money damages, and
therefore in the event of any such breach the aggrieved party shall be entitled
to the remedy of specific performance of such covenants and agreements and
injunctive and other equitable relief in addition to any other remedy to which
it may be entitled, at law or in equity.

                  (h) Remedies Cumulative. All rights, powers and remedies
provided under this Agreement or otherwise available in respect hereof at law
or in equity shall be cumulative and not alternative, and the exercise of any
thereof by any party shall not preclude the simultaneous


                                                 13




    
<PAGE>




or later exercise of any other such right, power or remedy by such party.

                  (i) No Waiver. The failure of any party hereto to exercise
any right, power or remedy provided under this Agreement or otherwise available
in respect hereof at law or in equity, or to insist upon compliance by any
other party hereto with its obligations hereunder, and any custom or practice
of the parties at variance with the terms hereof, shall not constitute a waiver
by such party of its right to exercise any such or other right, power or remedy
or to demand such compliance.

                  (j) No Third Party Beneficiaries. This Agreement is not
intended to be for the benefit of, and shall not be enforceable by, any person
or entity who or which is not a party hereto.

                  (k) Governing Law. This Agreement shall be governed and
construed in accordance with the laws of the State of Delaware, without giving
effect to the principles of conflicts of law thereof.

                  (l) Jurisdiction. Each party hereby irrevocably submits to
the exclusive jurisdiction of the Court of Chancery in the State of Delaware
and the United States District Court for the Southern District of New York in
any action, suit or proceeding arising in connection with this Agreement, and
agrees that any such action, suit or proceeding shall be brought only in such
court (and waives any objection based on forum non conveniens or any other
objection to venue therein). Each party hereto hereby waives any right to a
trial by jury in connection with any such action, suit or proceeding.

                  (m) Descriptive Headings. The descriptive headings used
herein are inserted for convenience of reference only and are not intended to
be part of or to affect the meaning or interpretation of this Agreement.

                  (n) Counterparts. This Agreement may be executed in
counterparts, each of which shall be deemed to be an original, but all of
which, taken together, shall constitute one and the same Agreement.


                                                 14




    
<PAGE>




                  IN WITNESS WHEREOF, Parent, the Purchaser and the Stockholder
have caused this Agreement to be duly executed as of the day and year first
above written.


                                            APPLIED MATERIALS, INC.


                                            By: /s/ James C. Morgan
                                               --------------------------------
                                            Name:  James C. Morgan
                                            Title: Chairman and Chief Executive
                                                   Officer


                                            ORION CORP. I


                                            By: /s/ Joseph J. Sweeney
                                               --------------------------------
                                            Name:  Joseph J. Sweeney
                                            Title: Vice President

                                            CLAL ELECTRONICS INDUSTRIES LTD.


                                            By: /s/ Mendy Erad
                                               --------------------------------
                                            Name:  Mendy Erad
                                            Title: Managing Director

                                            By: /s/ Meir Ben Shoshan
                                               --------------------------------
                                            Name:   Meir Ben Shoshan
                                            Title:  Vice President

                                         15




    
<PAGE>




                                   Schedule I




                                                         Number of Shares
Name of Stockholder                                     Beneficially Owned
- -------------------                                     ------------------

Clal Electronics Industries Ltd.                            2,692,327




                                                 16



                             STOCKHOLDER AGREEMENT


                  AGREEMENT, dated as of November 24, 1996, among Applied
Materials, Inc., a Delaware corporation ("Parent"), Orion Corp. I, a Delaware
corporation and a wholly owned subsidiary of Parent (the "Purchaser"), and
Orbotech Ltd. (the "Stockholder").

                              W I T N E S S E T H:

                  WHEREAS, concurrently with the execution and delivery of this
Agreement, Parent, the Purchaser and Opal, Inc., a Delaware corporation (the
"Company"), have entered into an Agreement and Plan of Merger (as such
agreement may hereafter be amended from time to time, the "Merger Agreement"),
pursuant to which Purchaser will be merged with and into the Company (the
"Merger");

                  WHEREAS, in furtherance of the Merger, Parent and the Company
desire that as soon as practicable (and not later than five business days)
after the execution and delivery of the Merger Agreement, the Purchaser shall
commence a cash tender offer (the "Offer") to purchase at a price of $18.50 per
share all outstanding shares of Company Common Stock (as defined in Section 1
hereof) including all of the Shares (as defined in Section 2 hereof)
beneficially owned by the Stockholder; and

                  WHEREAS, as an inducement and a condition to entering into
the Merger Agreement, Parent has required that the Stockholder agree, and the
Stockholder has agreed, to enter into this Agreement;

                  NOW, THEREFORE, in consideration of the foregoing and the
mutual representations, warranties, covenants and agreements contained herein,
the parties hereto agree as follows:

                  1.  Definitions.  For purposes of this Agreement:

                  (a) "Beneficially Own" or "Beneficial Ownership" with respect
to any securities shall mean having "beneficial ownership" of such securities
(as determined pursuant to Rule 13d-3 under the Securities Exchange Act







    
<PAGE>





of 1934, as amended (the "Exchange Act")), including pursuant to any agreement,
arrangement or understanding, whether or not in writing. Without duplicative
counting of the same securities by the same holder, securities Beneficially
Owned by a Person shall include securities Beneficially Owned by all other
Persons with whom such Person would constitute a "group" as within the meaning
of Section 13(d)(3) of the Exchange Act.

                  (b)      "Company Common Stock" shall mean at any
time the Common Stock, $.01 par value, of the Company.

                  (c)      "Person" shall mean an individual, corporation,
partnership, joint venture, association, trust, unincorporated organization or
other entity.

                  (d)      Capitalized terms used and not defined herein have
the respective meanings ascribed to them in the Merger Agreement.

                  2.       Tender of Shares.

                  (a) In order to induce Parent and the Purchaser to enter into
the Merger Agreement, the Stockholder hereby agrees to validly tender (or cause
the record owner of such shares to validly tender), and not to withdraw,
pursuant to and in accordance with the terms of the Offer, not later than the
fifth business day after commencement of the Offer pursuant to Section 1.1 of
the Merger Agreement and Rule 14d-2 under the Exchange Act, the number of
shares of Company Common Stock set forth opposite such Stockholder's name on
Schedule I hereto (the "Existing Shares", and together with any shares acquired
by such Stockholder in any capacity after the date hereof and prior to the
termination of this Agreement whether upon the exercise of Company Options or
by means of purchase, dividend, distribution or otherwise, the "Shares"), all
of which are Beneficially Owned by such Stockholder. The Stockholder hereby
acknowledges and agrees that Parent's and the Purchaser's obligation to accept
for payment and pay for the Shares in the Offer, including the Shares
Beneficially Owned by such Stockholder, is subject to the terms and conditions
of the Offer.

                  (b)      The transfer by the Stockholder of the Shares to
Purchaser in the Offer shall pass to and uncon-


                                                  2





    
<PAGE>





ditionally vest in the Purchaser good and valid title to the Shares, free and
clear of all Encumbrances.

                  (c) The Stockholder hereby permits Parent and the Purchaser
to publish and disclose in the Offer Documents and, if approval of the
Company's stockholders is required under applicable law, the Proxy Statement
(including all documents and schedules filed with the SEC) its identity and
ownership of the Company Common Stock and the nature of its commitments,
arrangements and understandings under this Agreement.

                  3.       Options.

                  (a) Exercise of Stock Option. In order to induce Parent and
the Purchaser to enter into the Merger Agreement, the Stockholder hereby grants
to Parent an irrevocable option (a "Stock Option") to purchase such
Stockholder's Shares (the "Option Shares") at an amount (the "Purchase Price")
equal to the Offer Price. If (i) the Offer is terminated, abandoned or
withdrawn by Parent or the Purchaser (whether due to the failure of any of the
conditions thereto or otherwise), other than at a time when Parent or the
Purchaser is in material breach of the terms of the Merger Agreement, or (ii)
the Merger Agreement is terminated in accordance with its terms, other than a
termination pursuant to Section 7.1(c)(i) or 7.1(c)(iii), each Stock Option
shall, in any such case, become exercisable, in whole but not in part, upon the
first to occur of any such event and remain exercisable in whole until the date
which is 60 days after the date of the occurrence of such event (the "60 Day
Period"), so long as: (i) all waiting periods under the Hart-Scott-Rodino
Antitrust Improvements Act of 1976, as amended (the "HSR Act"), required for
the purchase of the Option Shares upon such exercise shall have expired or been
waived; (ii) all other applicable consents of any Governmental Entity required
for the purchase or sale of the Option Shares upon such exercise and identified
on Schedule 5(c) attached hereto (if applicable) shall have been granted or
otherwise satisfied; and (iii) there shall not be in effect any preliminary
injunction or other order issued by any Governmental Entity prohibiting the
exercise of the Stock Option pursuant to this Agreement; provided that if (i)
all HSR Act waiting periods shall not have expired or been waived, (ii) all
other applicable consents of any Governmental Entity required for the


                                                  3





    
<PAGE>





purchase or sale of the Option Shares and identified on Schedule 5(c)
attached hereto (if applicable) shall not have been granted or otherwise
satisfied, or (iii) there shall be in effect any such injunction or order, in
each case on the expiration of the 60 Day Period, the 60 Day Period shall be
extended until 5 business days after the later of (A) the date of expiration or
waiver of all HSR Act waiting periods, (B) the grant or other satisfaction of
such required consents, and (C) the date of removal or lifting of such
injunction or order; provided, however, that in no event shall the Stock Option
be exercisable after the date which is six months after the date on which the
Stock Option first becomes exercisable; provided, further, that the Stock
Option shall terminate if any Governmental Entity shall issue an order, decree
or ruling or take any other action (which order, decree, ruling or other action
the parties hereto shall use their best efforts to lift), which permanently
restrains, enjoins or otherwise prohibits Parent's exercise of the Stock Option
or the sale of the Option Shares to Parent by the Stockholder. In the event
that Parent wishes to exercise a Stock Option, Parent shall send a written
notice (the "Notice") to the Stockholder identifying the place and date (not
less than two nor more than 10 business days from the date of the Notice) for
the closing of such purchase.

                  (b) Resale of Option Shares. If, within 12 months following
the acquisition by Parent of the Option Shares, Parent or any of its affiliates
sells, transfers or otherwise disposes of any or all of the Option Shares to
any third party (other than to an affiliate of Parent) (a "Subsequent Sale")
and realizes a Profit (as defined below) from such Subsequent Sale, then Parent
shall pay to the Stockholder an amount equal to 95% of the Profit promptly upon
receipt of the proceeds from such Subsequent Sale. For purposes of this Section
3(b), "Profit" shall mean (A) the amount of the excess, if any, of (x) the
aggregate consideration received by Parent or its affiliates in connection with
a Subsequent Sale over (y) the product of (i) the number of Shares sold,
transferred or disposed of multiplied by (ii) the Purchase Price less (B) any
taxes or any other payment of any nature due or payable by Parent with respect
to the amount specified in clause (A), other than Parent's or the Purchaser's
expenses incurred in connection with the negotiation, execution and delivery of
this Agreement and the Merger


                                                  4





    
<PAGE>





Agreement. In the event the consideration received by Parent in a Subsequent
Sale is other than cash, the Stockholder shall be entitled to the same form of
consideration as received by Parent in such Subsequent Sale or, at Parent's
election, an amount in cash equal to the fair market value of such other
consideration that the Stockholder would have been entitled to pursuant to this
Section 3(b).

                  4.       Additional Agreements.

                  (a) Voting Agreement. The Stockholder shall, at any meeting
of the holders of Company Common Stock, however called, or in connection with
any written consent of the holders of Company Common Stock, vote (or cause to
be voted) the Shares (if any) then held of record or Beneficially Owned by such
Stockholder, (i) in favor of the Merger, the execution and delivery by the
Company of the Merger Agreement and the approval of the terms thereof and each
of the other actions contemplated by the Merger Agreement and this Agreement
and any actions required in furtherance thereof and hereof; and (ii) against
any Acquisition Proposal and against any action or agreement that would impede,
frustrate, prevent or nullify this Agreement, or result in a breach in any
respect of any covenant, representation or warranty or any other obligation or
agreement of the Company under the Merger Agreement or which would result in
any of the conditions set forth in Annex A to the Merger Agreement or set forth
in Article VI of the Merger Agreement not being fulfilled.

                  (b) No Inconsistent Arrangements. The Stockholder hereby
covenants and agrees that, except as contemplated by this Agreement and the
Merger Agreement, it shall not (i) transfer (which term shall include, without
limitation, any sale, gift, pledge or other disposition), or consent to any
transfer of, any or all of such Stockholder's Shares, Company Options or any
interest therein, (ii) enter into any contract, option or other agreement or
understanding with respect to any transfer of any or all of such Shares,
Company Options or any interest therein, (iii) grant any proxy,
power-of-attorney or other authorization in or with respect to such Shares or
Company Options, (iv) deposit such Shares or Company Options into a voting
trust or enter into a voting agreement or arrangement with respect to such
Shares or Compa-


                                                  5





    
<PAGE>





ny Options, or (v) take any other action that would in any way restrict, limit
or interfere with the performance of its obligations hereunder or the
transactions contemplated hereby or by the Merger Agreement.

                  (c)      Grant of Irrevocable Proxy; Appointment of Proxy.

                  (i) The Stockholder hereby irrevocably grants to, and
appoints, Parent and Nancy H. Handel and Joseph J. Sweeney, or either of them,
in their respective capacities as officers of Parent, and any individual who
shall hereafter succeed to any such office of Parent, and each of them
individually, such Stockholder's proxy and attorney-in-fact (with full power of
substitution), for and in the name, place and stead of such Stockholder, to
vote such Stockholder's Shares, or grant a consent or approval in respect of
the Shares in favor of the various transactions contemplated by the Merger
Agreement (the "Transactions") and against any Acquisition Proposal.

                  (ii) The Stockholder represents that any proxies heretofore
given in respect of such Stockholder's Shares are not irrevocable, and that any
such proxies are hereby revoked.

                  (iii) The Stockholder understands and acknowledges that
Parent is entering into the Merger Agreement in reliance upon such
Stockholder's execution and delivery of this Agreement. The Stockholder hereby
affirms that the irrevocable proxy set forth in this Section 4(c) is given in
connection with the execution of the Merger Agreement, and that such
irrevocable proxy is given to secure the performance of the duties of such
Stockholder under this Agreement. The Stockholder hereby further affirms that
the irrevocable proxy is coupled with an interest and may under no
circumstances be revoked. The Stockholder hereby ratifies and confirms all that
such irrevocable proxy may lawfully do or cause to be done by virtue hereof.
Such irrevocable proxy is executed and intended to be irrevocable in accordance
with the provisions of Section 212(e) of the Delaware General Corporation Law.

                  (d)      No Solicitation.  The Stockholder hereby
agrees, in its or his capacity as a stockholder of the Company, that neither
such Stockholder nor any of its


                                                  6





    
<PAGE>





Subsidiaries or affiliates shall (and such Stockholder shall use its best
efforts to cause its officers, directors, employees, representatives and
agents, including, but not limited to, investment bankers, attorneys and
accountants, not to), directly or indirectly, encourage, solicit, participate
in or initiate discussions or negotiations with, or provide any information to,
any corporation, partnership, person or other entity or group (other than
Parent, any of its affiliates or representatives) concerning any Acquisition
Proposal. The Stockholder will immediately cease any existing activities,
discussions or negotiations with any parties conducted heretofore with respect
to any Acquisition Proposal. The Stockholder will immediately communicate to
Parent the terms of any proposal, discussion, negotiation or inquiry such
Stockholder, in its or his capacity as a stockholder of the Company, receives
(and will disclose any written materials received by such Stockholder, in its
or his capacity as a stockholder of the Company, in connection with such
proposal, discussion, negotiation or inquiry) and the identity of the party
making such proposal or inquiry which it may receive in respect of any such
transaction.

                  (e) Company Options. If the Stockholder holds Company Options
to acquire shares of Company Common Stock, he shall, if requested by the
Company, consent to the cancellation or substitution of his Company Options in
accordance with the terms of the Merger Agreement and shall execute all
appropriate documentation in connection with such cancellation or substitution.

                  (f) Best Reasonable Efforts. Subject to the terms and
conditions of this Agreement, each of the parties hereto agrees to use its best
reasonable efforts to take, or cause to be taken, all actions, and to do, or
cause to be done, all things necessary, proper or advisable under applicable
laws and regulations to consummate and make effective the transactions
contemplated by this Agreement and the Merger Agreement. Each party shall
promptly consult with the other and provide any necessary information and
material with respect to all filings made by such party with any Governmental
Entity in connection with this Agreement and the Merger Agreement and the
transactions contemplated hereby and thereby.



                                                  7





    
<PAGE>





                  (g)      Waiver of Appraisal Rights.  The Stockholder hereby
waives any rights of appraisal or rights to dissent from the Merger that it or
he may have.

                  (h)      Acquisition of Remaining Shares.  Parent agrees that,
in the event that within three years following Parent's exercise of the Stock
Option, Parent, the Purchaser or any of their Subsidiaries acquires any addi-
tional shares of Company Common Stock from, or pursuant to an offer made to all
of the Company's stockholders, whether by merger, consolidation, tender offer
or other similar transaction, the price paid per share of Company Common Stock
shall be no less than the Purchase Price.

                  5.       Representations and Warranties of the Stockholder.
The Stockholder hereby represents and warrants to Parent as follows:

                  (a) Ownership of Shares. Such Stockholder is the record and
Beneficial Owner of the Existing Shares, as set forth on Schedule I. On the
date hereof, the Existing Shares constitute all of the Shares owned of record
or Beneficially Owned by such Stockholder. Such Stockholder has sole voting
power and sole power to issue instructions with respect to the matters set
forth in Sections 2, 3 and 4 hereof, sole power of disposition, sole power of
conversion, sole power to demand appraisal rights and sole power to agree to
all of the matters set forth in this Agreement, in each case with respect to
all of the Existing Shares with no limitations, qualifications or restrictions
on such rights, subject to applicable securities laws and the terms of this
Agreement.

                  (b) Power; Binding Agreement. Such Stockholder has the legal
capacity, power and authority to enter into and perform all of such
Stockholder's obligations under this Agreement. The execution, delivery and
performance of this Agreement by such Stockholder will not violate any other
agreement to which such Stockholder is a party including, without limitation,
any voting agreement, proxy arrangement, pledge agreement, shareholders
agreement or voting trust. This Agreement has been duly and validly executed
and delivered by such Stockholder and constitutes a valid and binding agreement
of such Stockholder, enforceable against such Stockholder in accordance with
its terms. There is no beneficiary or holder of a voting trust certificate or
other interest of


                                                  8





    
<PAGE>





any trust of which such Stockholder is a trustee whose consent is required for
the execution and delivery of this Agreement or the consummation by such
Stockholder of the transactions contemplated hereby.

                  (c) No Conflicts. Except for filings under the HSR Act, the
Exchange Act and as set forth on Schedule 5(c) attached hereto, (i) no filing
with, and no permit, authorization, consent or approval of, any Governmental
Entity for the execution of this Agreement by such Stockholder and the
consummation by such Stockholder of the transactions contemplated hereby and
(ii) none of the execution and delivery of this Agreement by such Stockholder,
the consummation by such Stockholder of the transactions contemplated hereby or
compliance by such Stockholder with any of the provisions hereof shall (A)
conflict with or result in any breach of any organizational documents
applicable to the Stockholder, (B) result in a violation or breach of, or
constitute (with or without notice or lapse of time or both) a default (or give
rise to any third party right of termination, cancellation, material
modification or acceleration) under any of the terms, conditions or provisions
of any note, loan agreement, bond, mortgage, indenture, license, contract,
commitment, arrangement, understanding, agreement or other instrument or
obligation of any kind to which such Stockholder is a party or by which such
Stockholder or any of its properties or assets may be bound, or (C) violate any
order, writ, injunction, decree, judgment, order, statute, rule or regulation
applicable to such Stockholder or any of its properties or assets.

                  (d) No Encumbrances. Except as permitted by this Agreement,
the Existing Shares and the certificates representing such Shares are now, and
at all times during the term hereof will be, held by such Stockholder, or by a
nominee or custodian for the benefit of such Stockholder, free and clear of all
Encumbrances, proxies, voting trusts or agreements, understandings or
arrangements or any other rights whatsoever, except for any such Encumbrances
or proxies arising hereunder.

                  (e) No Finder's Fees. No broker, investment banker, financial
advisor or other person is entitled to any broker's, finder's, financial
adviser's or other similar fee or commission in connection with the transac-


                                                  9





    
<PAGE>





tions contemplated hereby based upon arrangements made by or on behalf of such
Stockholder.

                  (f) Reliance by Parent. The Stockholder understands and
acknowledges that Parent is entering into, and causing Purchaser to enter into,
the Merger Agreement in reliance upon such Stockholder's execution and delivery
of this Agreement.

                  6. Representations and Warranties of Parent and the
Purchaser. Each of Parent and the Purchaser hereby represents and warrants to
the Stockholder as follows:

                  (a) Power; Binding Agreement. Parent and the Purchaser each
has the corporate power and authority to enter into and perform all of its
obligations under this Agreement. The execution, delivery and performance of
this Agreement by each of Parent and the Purchaser will not violate any other
agreement to which either of them is a party. This Agreement has been duly and
validly executed and delivered by each of Parent and the Purchaser and
constitutes a valid and binding agreement of each of Parent and the Purchaser,
enforceable against each of Parent and the Purchaser in accordance with its
terms.

                  (b) No Conflicts. Except for filings under the HSR Act and
the Exchange Act, (i) no filing with, and no permit, authorization, consent or
approval of, any Governmental Entity is necessary for the execution of this
Agreement by each of Parent and the Purchaser and the consummation by each of
Parent and the Purchaser of the transactions contemplated hereby and (ii) none
of the execution and delivery of this Agreement by each of Parent and the
Purchaser, the consummation by each of Parent and the Purchaser of the
transactions contemplated hereby or compliance by each of Parent and the
Purchaser with any of the provisions hereof shall (A) conflict with or result
in any breach of any organizational documents applicable to either of Parent or
the Purchaser, (B) result in a violation or breach of, or constitute (with or
without notice or lapse of time or both) a default (or give rise to any third
party right of termination, cancellation, material modification or
acceleration) under any of the terms, conditions or provisions of any note,
loan agreement, bond, mortgage, indenture, license, contract, commitment,
arrangement, understanding, agree-


                                                 10





    
<PAGE>





ment or other instrument or obligation of any kind to which either of Parent or
the Purchaser is a party or by which either of Parent or the Purchaser or any
of their properties or assets may be bound, or (C) violate any order, writ,
injunction, decree, judgment, order, statute, rule or regulation applicable to
either of Parent or the Purchaser or any of their properties or assets.

                  7. Further Assurances. From time to time, at the other
party's request and without further consideration, each party hereto shall
execute and deliver such additional documents and take all such further lawful
action as may be necessary or desirable to consummate and make effective, in
the most expeditious manner practicable, the transactions contemplated by this
Agreement.

                  8. Stop Transfer. The Stockholder shall not request that the
Company register the transfer (book-entry or otherwise) of any certificate or
uncertificated interest representing any of the Shares, unless such transfer is
made in compliance with this Agreement. In the event of a stock dividend or
distribution, or any change in the Company Common Stock by reason of any stock
dividend, split-up, recapitalization, combination, exchange of shares or the
like, the term "Shares" shall refer to and include the Shares as well as all
such stock dividends and distributions and any shares into which or for which
any or all of the Shares may be changed or exchanged.

                  9. Termination. Except as provided in Section 3 hereof, the
covenants, agreements and proxy shall terminate upon the termination of the
Merger Agreement in accordance with its terms.

                  10.      Miscellaneous.

                  (a) Entire Agreement. This Agreement constitutes the entire
agreement between the parties with respect to the subject matter hereof and
supersedes all other prior agreements and understandings, both written and
oral, between the parties with respect to the subject matter hereof.

                  (b) Binding Agreement. This Agreement and the obligations
hereunder shall attach to the Shares and shall be binding upon any person or
entity to which legal


                                                 11





    
<PAGE>





or beneficial ownership of such Shares shall pass, whether by operation of law
or otherwise, including, without limitation, a Stockholder's heirs, guardians,
administrators or successors. Notwithstanding any transfer of Shares, the
transferor shall remain liable for the performance of all obligations of the
transferor under this Agreement.

                  (c) Assignment. This Agreement shall not be assigned by
operation of law or otherwise without the prior written consent of the other
parties, provided that Parent may assign, in its sole discretion, its rights
and obligations hereunder to any direct or indirect wholly owned subsidiary of
Parent, but no such assignment shall relieve Parent of its obligations
hereunder if such assignee does not perform such obligations.

                  (d) Amendments, Waivers, Etc. This Agreement may not be
amended, changed, supplemented, waived or otherwise modified or terminated,
except upon the execution and delivery of a written agreement executed by the
parties hereto.

                  (e) Notices. All notices, requests, claims, demands and other
communications hereunder shall be in writing and shall be given (and shall be
deemed to have been duly received if given) by hand delivery or telecopy (with
a confirmation copy sent for next day delivery via courier service, such as
Federal Express), or by any courier service, such as Federal Express, providing
proof of delivery. All communications hereunder shall be delivered to the
respective parties at the following addresses:


         If to the
         Stockholder:               Orbotech Ltd.
                                    Yavne Industrial Zone
                                    P.O. Box 601
                                    Yavne 81106, Israel
                                    Attention:  President
                                    Telephone No.: 972-8-942-5633

         If to Parent or
         the Purchaser:             Applied Materials, Inc.
                                    3050 Bowers Avenue
                                    Santa Clara, CA 95405-3299


                                                 12





    
<PAGE>






                                    Attention: Joseph J. Sweeney
                                    Telephone No.: (408) 727-5555
                                    Telecopy No.:(408) 563-4635

         Copy to:                   Skadden, Arps, Slate,
                                      Meagher & Flom LLP
                                    919 Third Avenue
                                    New York, New York  10022
                                    Attention:  David Fox
                                    Telephone No.: (212) 735-3000
                                    Telecopy No.: (212) 735-2000


or to such other address as the person to whom notice is given may have
previously furnished to the others in writing in the manner set forth above.

                  (f) Severability. Whenever possible, each provision or
portion of any provision of this Agreement will be interpreted in such manner
as to be effective and valid under applicable law but if any provision or
portion of any provision of this Agreement is held to be invalid, illegal or
unenforceable in any respect under any applicable law or rule in any
jurisdiction, such invalidity, illegality or unenforceability will not affect
any other provision or portion of any provision in such jurisdiction, and this
Agreement will be reformed, construed and enforced in such jurisdiction as if
such invalid, illegal or unenforceable provision or portion of any provision
had never been contained herein.

                  (g) Specific Performance. Each of the parties hereto
recognizes and acknowledges that a breach by it of any covenants or agreements
contained in this Agreement will cause the other party to sustain damages for
which it would not have an adequate remedy at law for money damages, and
therefore in the event of any such breach the aggrieved party shall be entitled
to the remedy of specific performance of such covenants and agreements and
injunctive and other equitable relief in addition to any other remedy to which
it may be entitled, at law or in equity.

                  (h) Remedies Cumulative. All rights, powers and remedies
provided under this Agreement or otherwise available in respect hereof at law
or in equity shall be cumulative and not alternative, and the exercise of any


                                                 13





    
<PAGE>





thereof by any party shall not preclude the simultaneous or later exercise of
any other such right, power or remedy by such party.

                  (i) No Waiver. The failure of any party hereto to exercise
any right, power or remedy provided under this Agreement or otherwise available
in respect hereof at law or in equity, or to insist upon compliance by any
other party hereto with its obligations hereunder, and any custom or practice
of the parties at variance with the terms hereof, shall not constitute a waiver
by such party of its right to exercise any such or other right, power or remedy
or to demand such compliance.

                  (j) No Third Party Beneficiaries. This Agreement is not
intended to be for the benefit of, and shall not be enforceable by, any person
or entity who or which is not a party hereto.

                  (k) Governing Law. This Agreement shall be governed and
construed in accordance with the laws of the State of Delaware, without giving
effect to the principles of conflicts of law thereof.

                  (l) Jurisdiction. Each party hereby irrevocably submits to
the exclusive jurisdiction of the Court of Chancery in the State of Delaware
and the United States District Court for the Southern District of New York in
any action, suit or proceeding arising in connection with this Agreement, and
agrees that any such action, suit or proceeding shall be brought only in such
court (and waives any objection based on forum non conveniens or any other
objection to venue therein). Each party hereto hereby waives any right to a
trial by jury in connection with any such action, suit or proceeding.

                  (m) Descriptive Headings. The descriptive headings used
herein are inserted for convenience of reference only and are not intended to
be part of or to affect the meaning or interpretation of this Agreement.

                  (n) Counterparts. This Agreement may be executed in
counterparts, each of which shall be deemed to be an original, but all of
which, taken together, shall constitute one and the same Agreement.


                                                 14





    
<PAGE>





                  IN WITNESS WHEREOF, Parent, the Purchaser and the Stockholder
have caused this Agreement to be duly executed as of the day and year first
above written.


                                            APPLIED MATERIALS, INC.


                                            By: /s/ James C. Morgan
                                               -------------------------------
                                            Name:  James C. Morgan
                                            Title: Chairman and Chief Executive
                                                   Officer

                                            ORION CORP. I


                                            By: /s/ Joseph J. Sweeney
                                               -------------------------------
                                            Name:  Joseph J. Sweeney
                                            Title: Vice President

                                            ORBOTECH LTD.


                                            By: /s/ Shlomo Barak
                                               -------------------------------
                                            Name:  Dr. Shlomo Barak
                                            Title: Chairman of the Board

                                            By: /s/ Yochai Richter
                                               -------------------------------
                                            Name:  Yochai Richter
                                            Title: President and Chief Executive
                                                   Officer

                                        15





    
<PAGE>





                                   Schedule I




                                                           Number of Shares
Name of Stockholder                                       Beneficially Owned
- -------------------                                       ------------------


Orbotech Ltd.                                                 1,241,650




                                                 16




                  CONFIDENTIALITY AND NONDISCLOSURE AGREEMENT


         THIS CONFIDENTIALITY AND NONDISCLOSURE AGREEMENT (the "Agreement") is
made and entered into as of October 21, 1996, by and between Applied
Materials, Inc. ("Buyer"), a corporation organized under the laws of the State
of Delaware, and Opal, Inc. ("Orion"), a company organized under the laws of
the State of Delaware, with reference to the following facts:


                                   RECITALS


         A.  WHEREAS, Buyer and Orion intend to enter into discussions and
transfer information regarding the possible acquisition by Buyer of the share
capital of Orion (the "Proposed Share Acquisition"); and

         B.  WHEREAS, in the course of the discussions, Buyer and Orion may
disclose or may have disclosed to one another, orally or in writing, certain
confidential and proprietary technical, financial and business information;
and

         C.  WHEREAS, Buyer and Orion wish to provide for the confidential
treatment of their discussions and written disclosures regarding the Proposed
Share Acquisition and all information related thereto.


                                   AGREEMENT


             NOW THEREFORE, the parties mutually agree to the following:

         1.  For the purpose of this Agreement, "Confidential Information"
shall mean (a) the existence or status of, or any other information relating
to, the discussions between Buyer and Orion (directly or through
representatives) relating to the Proposed Share Acquisition, and (b) any
information or materials disclosed by Buyer or Orion (in which case such party
shall be considered the "Disclosing Party") or by any directors, employees,
representatives, agents or professional advisors of the Disclosing Party, to
the other party (in which case such other party shall be considered the
"Recipient") or to any directors, employees, representatives, agents or
professional advisors of the Recipient, relating to the financial and business
information of the Disclosing Party or the design, development, manufacturing
or marketing of the Disclosing Party's products or services, or otherwise to
the business or technology of the Disclosing Party ; provided, however, that
any oral information disclosed to the Recipient by the Disclosing Party must
be identified in writing




    
<PAGE>


to the Recipient as confidential within 30 days following such disclosure in
order for such oral information to be deemed "Confidential Information"
hereunder.

         2.  Subject to Section 3 hereof, Recipient agrees to hold in
confidence and not to reveal, report, publish, disclose or transfer, directly
or indirectly, any of the Confidential Information of the Disclosing Party
(including, without limitation, the Confidential Information referenced in
clause (a) of Section 1 above, as to which information both parties shall be
considered the "Recipient") to any third party or use any of the Confidential
Information of the Disclosing Party for any purpose at any time except as
necessary to evaluate and implement the Proposed Share Acquisition; provided
that the Recipient may disclose the Confidential Information referenced in
clause (a) of Section 1 above to the extent it reasonably deems necessary in
order to comply with securities laws and/or stock exchange regulations; and
provided further that the Recipient shall, if practicable within the context
of applicable legal and stock exchange requirements, give the Disclosing Party
prompt prior notice and first allow the Disclosing Party reasonable time to
comment on the Confidential Information the Recipient proposes to disclose
prior to its disclosure and, if permitted by law, stock exchange regulations
and if practicable within the context of applicable legal and stock exchange
requirements, use reasonable efforts to accept the good faith comments of the
other party. Confidential Information referenced in clause (b) of Section 1
above shall remain the sole property of the Disclosing Party. At the request
of the Disclosing Party, Recipient will promptly return to the Disclosing
Party all Confidential Information of the Disclosing Party referenced in
Section 1 above that is in tangible form, including any copies, and, with
respect to abstracts or summaries of Confidential Information that Recipient
may have made, Recipient will destroy such abstracts or summaries and will
provide a written declaration from an authorized officer of the Recipient
certifying to the Disclosing Party that it has done so.

         3.  Recipient agrees to be responsible for the conduct of its
directors, employees, representatives, agents and professional advisors
regarding the confidentiality and use of the Confidential Information. In
furtherance and not in limitation thereof, Recipient agrees that without the
written consent of the Disclosing Party, disclosure of or access to the
Confidential Information shall be permitted only to the directors, key
employees, representatives, agents and professional advisors of Recipient who
have a need to know in connection with the Proposed Share Acquisition, and who
have agreed to hold such information in confidence and to comply with all of
the requirements of Section 2 above. Notwithstanding anything contained herein
to the contrary, Confidential Information referenced in clause (a) of Section
1 above may be disclosed by Buyer to the directors, key employees and
professional advisors of Orbot Instruments Ltd. who have a need to know such
Confidential Information in connection with Buyer's possible acquisition of
Orbot Instruments Ltd.'s share capital and who have agreed to hold such
information in confidence and not to use such information for any purpose
except in connection with such possible acquisition. Orion agrees that
information disclosed to it by Buyer as to the existence or status of, or any
other information relating to, the discussions between Buyer and Orbot

                                       2



    
<PAGE>


Instruments Ltd. shall be considered "Confidential Information" under clause
(a) of Section 1 above and treated as such hereunder.

         4.  Because of the unique confidential, proprietary and valuable
nature of the Confidential Information, Recipient understands and agrees that
in the event Recipient fails to comply with Recipient's obligations under
Sections 2 and 3 above that monetary damages may be inadequate to compensate
the Disclosing Party for such failure. Accordingly, Recipient agrees that the
Disclosing Party will, in addition to any other remedies available to it by
law or in equity, be entitled to seek injunctive relief to enforce the terms
of Sections 2 and 3 above.

         5.  Notwithstanding Section 2, Confidential Information shall not
include any information which (a) at the time of its disclosure or thereafter
is generally available to and known by the public other than as a result of a
disclosure by the Recipient or its directors, employees, representatives,
agents or professional advisors in violation of this Agreement, (b) was or
becomes available to the Recipient, on a nonconfidential basis from a source
other than the Disclosing Party without, to the knowledge of the Recipient, a
duty to the Disclosing Party having been breached, or (c) is shown by written
record to have been independently acquired or developed by Recipient without
violating this Agreement. If the Recipient or any of its directors, employees,
representatives, agents or professional advisors becomes legally compelled to
disclose any Confidential Information, Recipient shall provide the Disclosing
Party with prompt written notice of such required disclosures so that the
Disclosing Party may seek a protective order or other appropriate remedy
and/or may waive compliance with the confidentiality obligations hereof. In
the event that such protective order or other remedy is not obtained, or that
compliance is waived, Recipient shall disclose the minimum amount of
Confidential Information legally required and shall use its best efforts to
obtain assurance that confidential treatment will be accorded such
information.

         6.  So long as discussions are taking place with respect to the
Proposed Share Acquisition, Buyer shall not initiate contact with any officer,
employee or agent of Orion regarding its business, operations, prospects or
finances, except with the express written permission of Orion and except that
Buyer shall have the right to initiate contact with Messrs. Henry Schwarzbaum,
Avner Hermoni and Israel Niv without such permission. It is understood that
Henry Schwarzbaum will arrange for appropriate contacts for due diligence
purposes, which contacts shall include Messrs. Hermoni and Niv. Buyer shall
submit or direct all requests for additional information, requests for
facility tours or management meetings and discussions or questions regarding
procedures, to Mr. Schwarzbaum. So long as active discussions between the
parties regarding the Proposed Share Acquisition are being conducted, Orion
agrees to promptly provide any information reasonably requested by Buyer in
connection with Buyer's consideration of the Proposed Share Acquisition.

                                       3



    
<PAGE>


         7.  This Agreement shall be binding upon and inure to the benefit of
the parties, their subsidiaries, and their respective successors. No
assignment of this Agreement may be made by Recipient without the prior
written consent of the Disclosing Party, which consent may be withheld or
granted in the Disclosing Party's sole discretion.

         8.  Any communications, transmissions, correspondence or notices shall
be in writing, sent by hand delivery or postage prepaid, certified mail or by
telecopier, to the authorized representative of each party at the address set
forth below, or to such other address as to which notice is given in
accordance with this provision. Notices shall be deemed received seven
business days after mailing certified mail, or upon receipt if given by hand
or by telecopier.

            If to Buyer:

                Applied Materials, Inc.
                3050 Bowers Avenue
                Santa Clara, California  95054-3299
                U.S.A.
                Attention: Joseph J. Sweeney
                Facsimile No. (408) 563-4635
                Confirmation No. (408) 748-5420

            If to Orion:

                Opal, Inc.
                c/o Opal Technologies Ltd.
                Industrial Zone B
                Nes Ziona, 70451
                Israel
                Attention:  Henry Schwarzbaum
                Facsimile No. (International) 972 (8) 940-5683
                Confirmation No. (International) 972 (8) 938-3524

            With a copy to:

                Thomas P. Storer, P.C.
                Goodwin, Procter & Hoar LLP
                Exchange Place
                Boston, Massachusetts  02109

                                       4



    
<PAGE>


         9.  The parties hereto are independent contractors and nothing herein
shall be construed as creating any agency, joint venture, partnership or other
form of business association between the parties.

         10. (a) The obligations of Buyer and Orion under this Agreement shall
be governed by New York law applicable to contracts fully executed and
performed in New York, without regard to the principles of conflicts of laws
thereof. (b) This Agreement contains the full and complete understanding of
the parties with respect to the subject matter hereof and supersedes all prior
representations and understandings regarding the subject matter hereof,
whether oral or written. (c) In the event that any provision hereof or any
obligation hereunder is found invalid or unenforceable pursuant to a judicial
decree or decision, any such provision or obligation shall be deemed and
construed to extend to and only to the maximum extent permitted by law, and
the remainder of this Agreement shall remain valid and enforceable according
to its terms. (d) Obligations hereunder shall apply to any item of
Confidential Information for a period of three (3) years following its
disclosure to Recipient by the Disclosing Party, and with respect to the
Confidential Information referenced in clause (a) of Section 1 above, for a
period of one (1) year from the date hereof, subject to any longer period of
confidentiality to which the Disclosing Party is bound by agreement with a
third party. (e) Failure to exercise or delay in exercising any remedy
hereunder shall not be deemed a waiver thereof. (f) Each party represents that
this Agreement is being signed by a duly authorized officer. (g) The parties
intend to be mutually bound hereunder and understand and agree that each of
them is subject to all of the obligations of the "Recipient" hereunder with
respect to the Confidential Information referenced in clause (a) of Section 1
of this Agreement and with respect to the Confidential Information of the
other party referenced in clause (b) of Section 1 above. (h) This Agreement
may be signed in counterparts, each of which shall for all purposes be deemed
an original, and together shall constitute one and the same instrument.


         IN WITNESS WHEREOF the undersigned have executed this Agreement as of
the date first written above.


APPLIED MATERIALS, INC.                     OPAL, INC.

By:    /s/ Joseph J. Sweeney             By: /s/ Henry Schwarzbaum
      ----------------------------          -----------------------------------
Title:   Vice President               Title:  Chief Financial Officer
      ----------------------------           ----------------------------------


                                        By:    /s/ Rafi Yizhar
                                              ----------------------------
                                        Title:   Chief Executive Officer
                                              ----------------------------

                                       5



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