NOVELLUS SYSTEMS INC
8-K, 2000-04-21
SPECIAL INDUSTRY MACHINERY, NEC
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<PAGE>   1
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                    FORM 8-K


                CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF
                       THE SECURITIES EXCHANGE ACT OF 1934


       Date of Report (Date of earliest event reported): April 19, 2000


                             NOVELLUS SYSTEMS, INC.
             (Exact Name of Registrant as Specified in its Charter)


        CALIFORNIA                   000-17157                   77-0024666
(State or Other Jurisdiction  (Commission File Number)        (I.R.S. Employer
     of Incorporation)                                       Identification No.)



                   4000 North First Street, San Jose, CA 95134
          (Address of Principal Executive Offices, Including Zip Code)


                                 (408) 943-9700
              (Registrant's Telephone Number, Including Area Code)


                                 Not Applicable
          (Former Name or Former Address, if Changed Since Last Report)


<PAGE>   2





Item 5.  Other Events.

        On April 19, 2000, Novellus Systems, Inc. (the "Company") priced an
offering of 8,385,744 shares (the "Shares") of its Common Stock (plus
an over-allotment option of 661,635 shares) at $59.625 per share. Attached
as an exhibit to this Current Report on Form 8-K is the Underwriting
Agreement dated April 19, 2000 between the Company and Banc of America
Securities LLC, relating to the issuance and sale of the Shares.

Item 7.  Exhibits


    1.1        Underwriting Agreement











Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

April 20, 2000

                                        NOVELLUS SYSTEMS, INC.

                                        By: /s/ ROBERT H. SMITH
                                           ---------------------------------
                                            Robert H. Smith
                                            Executive Vice President,
                                            Finance and Administration, Chief
                                            Financial Officer, Secretary
                                            (Principal Financial Officer)



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                                  EXHIBIT INDEX


EXHIBIT             Description
- -------             -----------

    1.1             Underwriting Agreement


<PAGE>   1
                                                                     EXHIBIT 1.1








                                8,385,744 SHARES




                             NOVELLUS SYSTEMS, INC.



                                  COMMON STOCK





                             UNDERWRITING AGREEMENT

                              DATED APRIL 19, 2000






<PAGE>   2

                             UNDERWRITING AGREEMENT




                                                                  April 19, 2000


BANC OF AMERICA SECURITIES LLC
600 Montgomery Street
San Francisco, California 94111

Ladies and Gentlemen:

               INTRODUCTORY. Novellus Systems, Inc., a California corporation
(the "Company), proposes to issue and sell to Banc of America Securities LLC
(the "Underwriter") an aggregate of 8,385,744 shares (the "Firm Common Shares")
of its Common Stock, no par value ("Common Stock"). In addition, the Company has
granted to the Underwriter an option to purchase up to an additional 661,635
shares (the "Optional Common Shares") of Common Stock, as provided in Section 2.
The Firm Common Shares and, if and to the extent such option is exercised, the
Optional Common Shares are collectively called the "Common Shares".

               The Company has prepared and filed with the Securities and
Exchange Commission (the "Commission") two registration statements on Form S-3,
File Nos. 333-48037 and 333-34084, which contain a form of base prospectus to be
used in connection with the public offering and sale of the Common Shares. Such
registration statements, as amended, including the financial statements,
exhibits and schedules thereto, in the form in which each was declared effective
by the Commission under the Securities Act of 1933 and the rules and regulations
promulgated thereunder (collectively, the "Securities Act"), including all
documents incorporated or deemed to be incorporated by reference therein and any
information deemed to be a part thereof at the time of effectiveness pursuant to
Rule 430A or Rule 434 under the Securities Act or the Securities Exchange Act of
1934 and the rules and regulations promulgated thereunder (collectively, the
"Exchange Act"), are collectively called the "Registration Statement." Any
registration statement filed by the Company pursuant to Rule 462(b) under the
Securities Act is called the "Rule 462(b) Registration Statement", and from and
after the date and time of filing of the Rule 462(b) Registration Statement the
term "Registration Statement" shall include the Rule 462(b) Registration
Statement. Such base prospectus prepared pursuant to Rule 429 under the
Securities Act and the related prospectus supplement, in the form first
delivered by the Company to the Underwriter for use to confirm sales of the
Common Shares is called the "Prospectus." All references in this Agreement to
(i) the Registration Statement, the Rule 462(b) Registration Statement, a
preliminary prospectus or the Prospectus, or any amendments or supplements to
any of the foregoing, shall include any copy thereof filed with the Commission
pursuant to its Electronic Data Gathering, Analysis and Retrieval System
("EDGAR") and (ii) the Prospectus shall be deemed to include the "electronic
Prospectus" provided for use in connection with the offering of the Common
Shares as contemplated by Section 3(j) of this Agreement.

               All references in this Agreement to financial statements and
schedules and other information which is "contained," "included" or "stated" in
the Registration Statement or the Prospectus (and all other references of like
import) shall be deemed to mean and include all such financial statements and
schedules and other information which is or is deemed to be incorporated by
reference in the Registration Statement or the Prospectus, as the case may be;
and all references in this Agreement to amendments or supplements to the
Registration Statement or the Prospectus shall be deemed to mean and


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include the filing of any document under the Exchange Act which is or is deemed
to be incorporated by reference in the Registration Statement or the Prospectus,
as the case may be.

               The Company hereby confirms its agreements with the Underwriter
as follows:

        SECTION 1.    REPRESENTATIONS AND WARRANTIES OF THE COMPANY.

               The Company hereby represents, warrants and covenants to the
Underwriter as follows:

               (a) Compliance with Registration Requirements. The Registration
        Statement and any Rule 462(b) Registration Statement have been declared
        effective by the Commission under the Securities Act. The Company has
        complied to the Commission's satisfaction with all requests of the
        Commission for additional or supplemental information. No stop order
        suspending the effectiveness of the Registration Statement or any Rule
        462(b) Registration Statement is in effect and no proceedings for such
        purpose have been instituted or are pending or, to the best knowledge of
        the Company, are contemplated or threatened by the Commission.

               The Prospectus, as of its date, complied in all material respects
        with the Securities Act and the version thereof filed, or to be filed,
        by electronic transmission pursuant to EDGAR (except as may be permitted
        by Regulation S-T under the Securities Act) was, or will be, as
        applicable, identical to the copy thereof delivered to the Underwriter
        for use in connection with the offer and sale of the Common Shares. Each
        of the Registration Statement, any Rule 462(b) Registration Statement
        and any post-effective amendment thereto, at the time it became
        effective and at all subsequent times, complied and will comply in all
        material respects with the Securities Act and did not and will not
        contain any untrue statement of a material fact or omit to state a
        material fact required to be stated therein or necessary to make the
        statements therein not misleading. The Prospectus, as amended or
        supplemented, as of its date and at all subsequent times, did not and
        will not contain any untrue statement of a material fact or omit to
        state a material fact necessary in order to make the statements therein,
        in the light of the circumstances under which they were made, not
        misleading. The representations and warranties set forth in the two
        immediately preceding sentences do not apply to statements in or
        omissions from the Registration Statement, any Rule 462(b) Registration
        Statement, or any post-effective amendment thereto, or the Prospectus,
        or any amendments or supplements thereto, made in reliance upon and in
        conformity with information relating to the Underwriter furnished to the
        Company in writing by the Underwriter expressly for use therein. There
        are no contracts or other documents required to be described in the
        Prospectus or to be filed as exhibits to the Registration Statement
        which have not been described or filed as required.

               (b) Offering Materials Furnished to Underwriter. The Company has
        delivered or shall deliver to the Underwriter one copy of the manually
        signed Registration Statement and of each consent and certificate of
        experts filed as a part thereof, and conformed copies of the
        Registration Statement (without exhibits) and the Prospectus, as amended
        or supplemented, in such quantities and at such places as the
        Underwriter has reasonably requested.

               (c) Distribution of Offering Material by the Company. The Company
        has not distributed and will not distribute, prior to the later of the
        Second Closing Date (as defined below) and the completion of the
        Underwriter's distribution of the Common Shares, any offering material
        in connection with the offering and sale of the Common Shares other than
        the Prospectus or the Registration Statement.

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               (d) The Underwriting Agreement. This Agreement has been duly
        authorized, executed and delivered by, and is a valid and binding
        agreement of, the Company, enforceable in accordance with its terms,
        except as rights to indemnification hereunder may be limited by
        applicable law and except as the enforcement hereof may be limited by
        bankruptcy, insolvency, reorganization, moratorium or other similar laws
        relating to or affecting the rights and remedies of creditors or by
        general equitable principles.

               (e) Authorization of the Common Shares. The Common Shares to be
        purchased by the Underwriter from the Company have been duly authorized
        for issuance and sale pursuant to this Agreement and, when issued and
        delivered by the Company pursuant to this Agreement, will be validly
        issued, fully paid and nonassessable.

               (f) No Applicable Registration or Other Similar Rights. There are
        no persons with registration or other similar rights to have any equity
        or debt securities registered for sale under the Registration Statement
        or included in the offering contemplated by this Agreement, except for
        such rights as have been duly waived.

               (g) No Material Adverse Change. Except as otherwise disclosed in
        the Prospectus, subsequent to the respective dates as of which
        information is given in the Prospectus: (i) there has been no material
        adverse change, or any development that could reasonably be expected to
        result in a material adverse change, in the condition, financial or
        otherwise, or in the earnings, business, operations or prospects,
        whether or not arising from transactions in the ordinary course of
        business, of the Company and its subsidiaries, considered as one entity
        (any such change is called a "Material Adverse Change"); (ii) the
        Company and its subsidiaries, considered as one entity, have not
        incurred any material liability or obligation, indirect, direct or
        contingent, not in the ordinary course of business nor entered into any
        material transaction or agreement not in the ordinary course of
        business; and (iii) there has been no dividend or distribution of any
        kind declared, paid or made by the Company or, except for dividends paid
        to the Company or other subsidiaries, any of its subsidiaries on any
        class of capital stock or repurchase or redemption by the Company or any
        of its subsidiaries of any class of capital stock.

               (h) Independent Accountants. Ernst & Young LLP (the
        "Accountants"), who have expressed their opinion with respect to the
        financial statements (which term as used in this Agreement includes the
        related notes thereto) and supporting schedules filed with the
        Commission by the Company and included (or incorporated by reference) in
        the Registration Statement and the Prospectus, are independent public or
        certified public accountants as required by the Securities Act and the
        Securities Exchange Act of 1934, as amended (the "Exchange Act").

               (i) Preparation of the Financial Statements. The financial
        statements filed with the Commission by the Company and included (or
        incorporated by reference) in the Registration Statement and the
        Prospectus present fairly the consolidated financial position of the
        Company and its subsidiaries as of and at the dates indicated and the
        results of their operations and cash flows for the periods specified.
        The supporting schedules filed with the Commission by the Company and
        included (or incorporated by reference) in the Registration Statement
        and the Prospectus present fairly the information required to be stated
        therein. Such financial statements and supporting schedules have been
        prepared in conformity with generally accepted accounting principles as
        applied in the United States applied on a consistent basis throughout
        the periods involved, except as may be expressly stated in the related
        notes thereto. No other financial statements or supporting schedules are
        required to be included (or incorporated by reference) in the
        Registration Statement. The financial information included under the
        caption "Selected

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<PAGE>   5

        Consolidated Financial Data" in the Company's 1999 Annual Report to
        Shareholders, which information is incorporated by reference in the
        Prospectus, fairly present the information set forth therein on a basis
        consistent with that of the audited financial statements contained in
        the Registration Statement.

               (j) Incorporation and Good Standing of the Company and Its
        Subsidiaries. Each of the Company and its subsidiaries has been duly
        incorporated and is validly existing as a corporation under the laws of
        the jurisdiction of its incorporation and each of the Company and each
        of its subsidiaries incorporated under the laws of one of the states of
        the United States is in good standing under the laws of its state of
        formation. Each of the Company and each of its subsidiaries has
        corporate power and authority to own, lease and operate its properties
        and to conduct its business as described in the Prospectus and, in the
        case of the Company, to enter into and perform its obligations under
        this Agreement. Each of the Company and each subsidiary is duly
        qualified as a foreign corporation to transact business and is in good
        standing in each jurisdiction in which such qualification is required,
        whether by reason of the ownership or leasing of property or the conduct
        of business, except for such jurisdictions where the failure to so
        qualify or to be in good standing would not, individually or in the
        aggregate, result in a Material Adverse Change. All of the issued and
        outstanding capital stock of each subsidiary has been duly authorized
        and validly issued, is fully paid and nonassessable and is owned by the
        Company, directly or through subsidiaries, free and clear of any
        security interest, mortgage, pledge, lien, encumbrance or claim. The
        Company does not own or control, directly or indirectly, any
        corporation, association or other entity other than the subsidiaries
        listed in Exhibit 21.1 to the Company's Annual Report on Form 10-K for
        the fiscal year ended December 31, 1999.

               (k) Capitalization and Other Capital Stock Matters. The
        authorized, issued and outstanding capital stock of the Company consists
        of 10,000,000 shares of preferred stock, none of which are outstanding,
        and 240,000,000 shares of Common Stock, 121,164,891 of which were
        outstanding on March 20, 2000. The Common Stock (including the Common
        Shares) conforms in all material respects to the description thereof
        contained in the Prospectus. All of the issued and outstanding shares of
        Common Stock have been duly authorized and validly issued, are fully
        paid and nonassessable and have been issued in compliance with federal
        and state securities laws. None of the outstanding shares of Common
        Stock were issued in violation of any preemptive rights, rights of first
        refusal or other similar rights to subscribe for or purchase securities
        of the Company. There are no authorized or outstanding options,
        warrants, preemptive rights, rights of first refusal or other rights to
        purchase, or equity or debt securities convertible into or exchangeable
        or exercisable for, any capital stock of the Company or any of its
        subsidiaries other than those accurately described in the Prospectus.
        The description of the Company's stock option, stock bonus and other
        stock plans or arrangements, and the options or other rights granted
        thereunder, set forth in the Prospectus accurately and fairly describes
        such plans, arrangements, options and rights.

               (l) Stock Exchange Listing. The Common Stock (including the
        Common Shares) is registered pursuant to Section 12(g) of the Securities
        Exchange Act of 1934 (the "Exchange Act") and is listed on the Nasdaq
        National Market, and the Company has taken no action designed to, or
        likely to have the effect of, terminating the registration of the Common
        Stock under the Exchange Act or delisting the Common Stock from the
        Nasdaq National Market, nor has the Company received any notification
        that the Commission or the National Association of Securities Dealers,
        Inc. (together with its regulatory subsidiary, NASD Regulation, Inc.,
        the "NASD") is contemplating terminating such registration or listing.

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               (m) Non-Contravention of Existing Instruments; No Further
        Authorizations or Approvals Required. Neither the Company nor any of its
        subsidiaries is in violation of its charter or by-laws or is in default
        (or, with the giving of notice or lapse of time, would be in default)
        ("Default") under any indenture, mortgage, loan or credit agreement,
        note, contract, franchise, lease or other instrument to which the
        Company or any of its subsidiaries is a party or by which it or any of
        them may be bound, or to which any of the property or assets of the
        Company or any of its subsidiaries is subject (each, an "Existing
        Instrument"), except for such Defaults as would not, individually or in
        the aggregate, result in a Material Adverse Change. The Company's
        execution, delivery and performance of this Agreement and consummation
        of the transactions contemplated hereby and by the Prospectus (i) have
        been duly authorized by all necessary corporate action and will not
        result in any violation of the provisions of the charter or by-laws of
        the Company or any subsidiary, (ii) will not conflict with or constitute
        a breach of, or Default under, or result in the creation or imposition
        of any lien, charge or encumbrance upon any property or assets of the
        Company or any of its subsidiaries pursuant to, or require the consent
        of any other party to, any Existing Instrument, except for such
        conflicts, breaches, Defaults, liens, charges or encumbrances as would
        not, individually or in the aggregate, result in a Material Adverse
        Change and (iii) will not result in any violation of any law,
        administrative regulation or administrative or court decree applicable
        to the Company or any subsidiary. No consent, approval, authorization or
        other order of, or registration or filing with, any court or other
        governmental or regulatory authority or agency, is required for the
        Company's execution, delivery and performance of this Agreement and
        consummation of the transactions contemplated hereby and by the
        Prospectus, except such as have been obtained or made by the Company and
        are in full force and effect under the Securities Act and applicable
        state securities or blue sky laws.

               (n) No Material Actions or Proceedings. Except as otherwise
        disclosed in the Prospectus, there is no legal or governmental action,
        suit or proceeding pending or, to the best of the Company's knowledge,
        threatened (i) against or affecting the Company or any of its
        subsidiaries, (ii) which has as the subject thereof any officer or
        director of, or property owned or leased by, the Company or any of its
        subsidiaries or (iii) relating to environmental or discrimination
        matters, where in any such case (A) there is a reasonable possibility
        that such action, suit or proceeding might be determined adversely to
        the Company or such subsidiary and (B) any such action, suit or
        proceeding, if so determined adversely, would reasonably be expected to
        result in a Material Adverse Change or adversely affect the consummation
        of the transactions contemplated by this Agreement. Except as otherwise
        disclosed in the Prospectus, no material labor dispute with the
        employees of the Company or any of its subsidiaries, or with the
        employees of any principal supplier of the Company, exists or, to the
        best of the Company's knowledge, is threatened or imminent.

               (o) Intellectual Property Rights. Except as otherwise disclosed
        in the Prospectus, the Company and its subsidiaries own or possess
        sufficient trademarks, trade names, patent rights, copyrights, licenses,
        approvals, trade secrets and other similar rights (collectively,
        "Intellectual Property Rights") reasonably necessary to conduct their
        businesses as now conducted; and the expected expiration of any of such
        Intellectual Property Rights would not result in a Material Adverse
        Change. Neither the Company nor any of its subsidiaries has received any
        notice of infringement or conflict with asserted Intellectual Property
        Rights of others, which infringement or conflict, if the subject of an
        unfavorable decision, would result in a Material Adverse Change.

               (p) All Necessary Permits, etc. Except as otherwise disclosed in
        the Prospectus, (i) the Company and each subsidiary possess such valid
        and current certificates, authorizations or permits issued by the
        appropriate state, federal or foreign regulatory agencies or bodies
        necessary to conduct their respective businesses, except for such
        certificates, authorizations and permits as

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        the failure of which to obtain, singly or in the aggregate, will not
        result in a Material Adverse Change, and (ii) neither the Company nor
        any subsidiary has received any notice of proceedings relating to the
        revocation or modification of, or non-compliance with, any such
        certificate, authorization or permit which, singly or in the aggregate,
        if the subject of an unfavorable decision, ruling or finding, could
        result in a Material Adverse Change.

               (q) Title to Properties. Except as otherwise disclosed in the
        Prospectus, the Company and each of its subsidiaries has good and
        marketable title to all the properties and assets reflected as owned in
        the financial statements referred to in Section 1(i) above (or elsewhere
        in the Prospectus), in each case free and clear of any security
        interests, mortgages, liens, encumbrances, equities, claims and other
        defects, except such as do not materially and adversely affect the value
        of such property and do not materially interfere with the use made or
        proposed to be made of such property by the Company or such subsidiary.
        The real property, improvements, equipment and personal property held
        under lease by the Company or any subsidiary are held under valid and
        enforceable leases, with such exceptions as are not material and do not
        materially interfere with the use made or proposed to be made of such
        real property, improvements, equipment or personal property by the
        Company or such subsidiary.

               (r) Tax Law Compliance. The Company and its consolidated
        subsidiaries have filed all necessary federal, state and foreign income
        and franchise tax returns or have properly requested extensions thereof
        and have paid all taxes required to be paid by any of them and, if due
        and payable, any related or similar assessment, fine or penalty levied
        against any of them except as may be being contested in good faith and
        by appropriate proceedings. The Company has made adequate charges,
        accruals and reserves in the applicable financial statements referred to
        in Section 1(i) above in respect of all federal, state and foreign
        income and franchise taxes for all periods as to which the tax liability
        of the Company or any of its consolidated subsidiaries has not been
        finally determined.

               (s) Company Not an "Investment Company". The Company has been
        advised of the rules and requirements under the Investment Company Act
        of 1940, as amended (the "Investment Company Act"). The Company is not,
        and after receipt of payment for the Common Shares will not be, an
        "investment company" within the meaning of Investment Company Act and
        will conduct its business in a manner so that it will not become subject
        to the Investment Company Act.

               (t) Insurance. Except as otherwise disclosed in the Prospectus,
        each of the Company and each of its subsidiaries is insured by
        recognized, financially sound and reputable institutions with policies
        in such amounts and with such deductibles and covering such risks as are
        generally deemed adequate and customary for their businesses including,
        but not limited to, policies covering real and personal property owned
        or leased by the Company and its subsidiaries against theft, damage,
        destruction, acts of vandalism and earthquakes. The Company has no
        reason to believe that it or any subsidiary will not be able (i) to
        renew its existing insurance coverage as and when such policies expire
        or (ii) to obtain comparable coverage from similar institutions as may
        be necessary or appropriate to conduct its business as now conducted and
        at a cost that would not result in a Material Adverse Change. Neither of
        the Company nor any subsidiary has been denied any insurance coverage
        which it has sought or for which it has applied.

               (u) No Price Stabilization or Manipulation. The Company has not
        taken and will not take, directly or indirectly, any action designed to
        or that might be reasonably expected to cause

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        or result in stabilization or manipulation of the price of the Common
        Stock to facilitate the sale or resale of the Common Shares.

               (v) Related Party Transactions. There are no business
        relationships or related-party transactions involving the Company or any
        subsidiary or any other person required to be described in the
        Prospectus which have not been described as required.

               (w) No Unlawful Contributions or Other Payments. Except as
        otherwise disclosed in the Prospectus, neither the Company nor any of
        its subsidiaries nor, to the best of the Company's knowledge, any
        employee or agent of the Company or any subsidiary, has made any
        contribution or other payment to any official of, or candidate for, any
        federal, state or foreign office in violation of any law or of the
        character required to be disclosed in the Prospectus.

               (x) Company's Accounting System. The Company maintains a system
        of accounting controls sufficient to provide reasonable assurances that
        (i) transactions are executed in accordance with management's general or
        specific authorization; (ii) transactions are recorded as necessary to
        permit preparation of financial statements in conformity with generally
        accepted accounting principles as applied in the United States and to
        maintain accountability for assets; (iii) access to assets is permitted
        only in accordance with management's general or specific authorization;
        and (iv) the recorded accountability for assets is compared with
        existing assets at reasonable intervals and appropriate action is taken
        with respect to any differences.

               (y) Exchange Act Compliance. The documents incorporated or deemed
        to be incorporated by reference in the Prospectus, at the time they were
        or hereafter are filed with the Commission, complied and will comply in
        all material respects with the requirements of the Exchange Act, and,
        when read together with the other information in the Prospectus, at the
        time the Registration Statement and any amendments thereto become
        effective and at the First Closing Date and the Second Closing Date, as
        the case may be, will not contain an untrue statement of a material fact
        or omit to state a material fact required to be stated therein or
        necessary to make the fact required to be stated therein or necessary to
        make the statements therein, in the light of the circumstances under
        which they were made, not misleading.

               (z) Compliance with Environmental Laws. Except as otherwise
        disclosed in the Prospectus or as would not, individually or in the
        aggregate, result in a Material Adverse Change (i) neither the Company
        nor any of its subsidiaries is in violation of any federal, state, local
        or foreign law or regulation relating to pollution or protection of
        human health or the environment (including, without limitation, ambient
        air, surface water, groundwater, land surface or subsurface strata) or
        wildlife, including without limitation, laws and regulations relating to
        emissions, discharges, releases or threatened releases of chemicals,
        pollutants, contaminants, wastes, toxic substances, hazardous
        substances, petroleum and petroleum products (collectively, "Materials
        of Environmental Concern"), or otherwise relating to the manufacture,
        processing, distribution, use, treatment, storage, disposal, transport
        or handling of Materials of Environment Concern (collectively,
        "Environmental Laws"), which violation includes, but is not limited to,
        noncompliance with any permits or other governmental authorizations
        required for the operation of the business of the Company or its
        subsidiaries under applicable Environmental Laws, or noncompliance with
        the terms and conditions thereof, nor has the Company or any of its
        subsidiaries received any written communication, whether from a
        governmental authority, citizens group, employee or otherwise, that
        alleges that the Company or any of its subsidiaries is in violation of
        any Environmental Law; (ii) there is no claim, action or cause of action
        filed with a court or governmental authority, no investigation with
        respect to which the Company has received written notice, and no written
        notice by any person or entity alleging potential liability

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        for investigatory costs, cleanup costs, governmental responses costs,
        natural resources damages, property damages, personal injuries,
        attorneys' fees or penalties arising out of, based on or resulting from
        the presence, or release into the environment, of any Material of
        Environmental Concern at any location owned, leased or operated by the
        Company or any of its subsidiaries, now or in the past (collectively,
        "Environmental Claims"), pending or, to the best of the Company's
        knowledge, threatened against the Company or any of its subsidiaries or
        any person or entity whose liability for any Environmental Claim the
        Company or any of its subsidiaries has retained or assumed either
        contractually or by operation of law; and (iii) to the best of the
        Company's knowledge, there are no past or present actions, activities,
        circumstances, conditions, events or incidents, including, without
        limitation, the release, emission, discharge, presence or disposal of
        any Material of Environmental Concern, that reasonably could result in a
        violation of any Environmental Law or form the basis of a potential
        Environmental Claim against the Company or any of its subsidiaries or
        against any person or entity whose liability for any Environmental Claim
        the Company or any of its subsidiaries has retained or assumed either
        contractually or by operation of law.

               (aa) Periodic Review of Costs of Environmental Compliance. From
        time to time the Company monitors the effect of Environmental Laws on
        the business, operations and properties of the Company and its
        subsidiaries, in the course of which it identifies and evaluates
        associated costs and liabilities (including, without limitation, any
        capital or operating expenditures required for clean-up, closure of
        properties or compliance with Environmental Laws or any permit, license
        or approval, any related constraints on operating activities and any
        potential liabilities to third parties). On the basis of such review and
        the amount of its established reserves, the Company has reasonably
        concluded that such associated costs and liabilities would not,
        individually or in the aggregate, result in a Material Adverse Change.

               (bb) ERISA Compliance. Except as otherwise disclosed in the
        Prospectus, the Company and its subsidiaries and any "employee benefit
        plan" (as defined under the Employee Retirement Income Security Act of
        1974, as amended, and the regulations and published interpretations
        thereunder (collectively, "ERISA")) established or maintained by the
        Company, its subsidiaries or their "ERISA Affiliates" (as defined below)
        are in compliance in all material respects with ERISA. "ERISA Affiliate"
        means, with respect to the Company or a subsidiary, any member of any
        group of organizations described in Sections 414(b),(c),(m) or (o) of
        the Internal Revenue Code of 1986, as amended, and the regulations and
        published interpretations thereunder (the "Code") of which the Company
        or such subsidiary is a member. No "reportable event" (as defined under
        ERISA) has occurred or is reasonably expected to occur with respect to
        any "employee benefit plan" established or maintained by the Company,
        its subsidiaries or any of their ERISA Affiliates. No "employee benefit
        plan" established or maintained by the Company, its subsidiaries or any
        of their ERISA Affiliates, if such "employee benefit plan" were
        terminated, would have any "amount of unfunded benefit liabilities" (as
        defined under ERISA). Neither the Company, its subsidiaries nor any of
        their ERISA Affiliates has incurred or reasonably expects to incur any
        liability under (i) Title IV of ERISA with respect to termination of, or
        withdrawal from, any "employee benefit plan" or (ii) Sections 412, 4971,
        4975 or 4980B of the Code. Each "employee benefit plan" established or
        maintained by the Company, its subsidiaries or any of their ERISA
        Affiliates that is intended to be qualified under Section 401(a) of the
        Code is so qualified and nothing has occurred, whether by action or
        failure to act, which would cause the loss of such qualification.

               (cc) Year 2000. There are no Year 2000 issues related to the
        Company or its subsidiaries that (i) are of a character required to be
        described or referred to in the Registration Statement or Prospectus by
        the Securities Act which have not been accurately described in the

                                       8
<PAGE>   10

        Registration Statement or Prospectus or (ii) might reasonably be
        expected to result in any Material Adverse Change or that might
        materially affect their properties, assets or rights.

               Any certificate signed by an officer of the Company and delivered
to the Underwriter or to counsel for the Underwriter shall be deemed to be a
representation and warranty by the Company to the Underwriter as to the matters
set forth therein.

        SECTION 2.    PURCHASE, SALE AND DELIVERY OF THE COMMON SHARES.

               (a) The Firm Common Shares. The Company agrees to issue and sell
        the Firm Common Shares to the Underwriter upon the terms set forth in
        this Agreement. On the basis of the representations, warranties and
        agreements contained in this Agreement, and upon the terms but subject
        to the conditions set forth in this Agreement, the Underwriter agrees to
        purchase the Firm Common Shares from the Company. The purchase price per
        Firm Common Share to be paid by the Underwriter to the Company shall be
        $58.20 per share.

               (b) The First Closing Date. Delivery of the Firm Common Shares to
        be purchased by the Underwriter and payment therefor shall be made at
        the offices of the Underwriter, 600 Montgomery Street, San Francisco,
        California (or such other place as may be agreed to by the Company and
        the Underwriter) at 6:00 a.m. San Francisco time, on Tuesday, April 25,
        2000 (the time and date of such closing are called the "First Closing
        Date").

               (c) The Optional Common Shares; the Second Closing Date. In
        addition, on the basis of the representations, warranties and agreements
        herein contained, and upon the terms but subject to the conditions
        herein set forth, the Company hereby grants an option to the Underwriter
        to purchase up to an aggregate of 661,635 Optional Common Shares from
        the Company at the purchase price per share to be paid by the
        Underwriter for the Firm Common Shares. The option granted hereunder is
        for use by the Underwriter solely in covering any over-allotments in
        connection with the sale and distribution of the Firm Common Shares. The
        option granted hereunder may be exercised at any time (but not more than
        once) upon notice by the Underwriter to the Company, which notice may be
        given at any time within 30 days from the date of this Agreement. Such
        notice shall set forth (i) the aggregate number of Optional Common
        Shares as to which the Underwriter is exercising the option, (ii) the
        names and denominations in which the Optional Common Shares are to be
        registered and (iii) the time, date and place at which such certificates
        will be delivered (which time and date may be simultaneous with, but not
        earlier than, the First Closing Date; and in such case the term "First
        Closing Date" shall refer to the time and date of delivery of the Firm
        Common Shares and the Optional Common Shares). Such time and date of
        delivery, if subsequent to the First Closing Date, is called the "Second
        Closing Date" and shall be determined by the Underwriter and shall not
        be earlier than three nor later than five full business days after
        delivery of such notice of exercise. If any Optional Common Shares are
        to be purchased, (a) the Underwriter agrees to purchase the number of
        Optional Common Shares specified in the notice of exercise and (b) the
        Company agrees to sell such number of Optional Common Shares. The
        Underwriter may cancel the option at any time prior to its expiration by
        giving written notice of such cancellation to the Company.

               (d) Public Offering of the Common Shares. The Underwriter hereby
        advises the Company that the Underwriter intends to offer the Common
        Shares for sale to the public, as described in the Prospectus, as soon
        after this Agreement has been executed and the Registration Statement
        has been declared effective as the Underwriter, in its sole judgment,
        has determined is advisable and practicable.

                                       9
<PAGE>   11


               (e) Payment for the Common Shares. Payment for the Common Shares
        shall be made at the First Closing Date (and, if applicable, at the
        Second Closing Date) by wire transfer of immediately available funds to
        the order of the Company.

               (f) Delivery of the Common Shares. The Company shall deliver, or
        cause to be delivered, a credit representing the Firm Common Shares and,
        if applicable the Optional Common Shares, to an account or accounts at
        The Depository Trust Company as designated by the Underwriter at the
        First Closing Date and, if applicable, the Second Closing Date, against
        the irrevocable release of a wire transfer of immediately available
        funds for the amount of the purchase price therefor. Notwithstanding the
        foregoing, to the extent the Underwriter so elects at least three full
        business days prior to the First Closing Date or the Second Closing
        Date, as the case may be, the Company shall deliver, or cause to be
        delivered, to the Underwriter certificates for the Common Shares to be
        sold to it on such Closing Date, against the irrevocable release of a
        wire transfer of immediately available funds for the amount of the
        purchase price therefor. In such case, the certificates for the Common
        Shares shall be in definitive form and registered in such names and
        denominations as the Underwriter shall have requested at least two full
        business days prior to the First Closing Date (or the Second Closing
        Date, as the case may be) and shall be made available for inspection on
        the business day preceding the First Closing Date (or the Second Closing
        Date, as the case may be) at a location in New York City or San
        Francisco, California, as the Underwriter may designate.

               (g) Time of the Essence. Time shall be of the essence, and
        delivery at the time and place specified in this Agreement is a further
        condition to the obligations of the Underwriter.

               (h) Delivery of Prospectus to the Underwriter. Not later than
        12:00 p.m. on the second business day following the date the Common
        Shares are first released by the Underwriter for sale to the public, the
        Company shall deliver or cause to be delivered, copies of the Prospectus
        in such quantities and at such places as the Underwriter shall request.

        SECTION 3.    ADDITIONAL COVENANTS OF THE COMPANY.

               The Company further covenants and agrees with each Underwriter as
follows:

               (a) Underwriter's Review of Proposed Amendments and Supplements.
        During such period beginning on the date hereof and ending on the later
        of the First Closing Date or such date, as in the opinion of counsel for
        the Underwriter, the Prospectus is no longer required by law to be
        delivered in connection with sales by an Underwriter or dealer (the
        "Prospectus Delivery Period"), prior to amending or supplementing the
        Registration Statement (including any registration statement filed under
        Rule 462(b) under the Securities Act) or the Prospectus (including any
        amendment or supplement through incorporation by reference of any report
        filed under the Exchange Act), the Company shall furnish to the
        Underwriter for review a copy of each such proposed amendment or
        supplement, and the Company shall not file any such proposed amendment
        or supplement to which the Underwriter reasonably objects.

               (b) Securities Act Compliance. After the date of this Agreement,
        the Company shall promptly advise the Underwriter in writing (i) of the
        receipt of any comments of, or requests for additional or supplemental
        information from, the Commission, (ii) of the time and date of any
        filing of any post-effective amendment to the Registration Statement or
        any amendment or supplement to any preliminary prospectus or the
        Prospectus, (iii) of the time and date that any post-effective amendment
        to the Registration Statement becomes effective and (iv) of the issuance
        by the Commission of any stop order suspending the effectiveness of the
        Registration

                                       10
<PAGE>   12

        Statement or any post-effective amendment thereto or of any order
        preventing or suspending the use of any preliminary prospectus or the
        Prospectus, or of any proceedings to remove, suspend or terminate from
        listing or quotation the Common Stock from any securities exchange upon
        which it is listed for trading or included or designated for quotation,
        or of the threatening or initiation of any proceedings for any of such
        purposes. If the Commission shall enter any such stop order at any time,
        the Company will use its best efforts to obtain the lifting of such
        order at the earliest possible moment. Additionally, the Company agrees
        that it shall comply with the provisions of Rules 424(b), 430A and 434,
        as applicable, under the Securities Act and will use its reasonable
        efforts to confirm that any filings made by the Company under such Rule
        424(b) were received in a timely manner by the Commission.

               (c) Amendments and Supplements to the Prospectus and Other
        Securities Act Matters. If, during the Prospectus Delivery Period, any
        event shall occur or condition exist as a result of which it is
        necessary to amend or supplement the Prospectus in order to make the
        statements therein, in the light of the circumstances when the
        Prospectus is delivered to a purchaser, not misleading, or if in the
        opinion of the Underwriter or counsel for the Underwriter it is
        otherwise necessary to amend or supplement the Prospectus to comply with
        law, the Company agrees to promptly prepare (subject to Section 3(a)
        hereof), file with the Commission and furnish at its own expense to the
        Underwriter and to dealers, amendments or supplements to the Prospectus
        so that the statements in the Prospectus as so amended or supplemented
        will not, in the light of the circumstances when the Prospectus is
        delivered to a purchaser, be misleading or so that the Prospectus, as
        amended or supplemented, will comply with law.

               (d) Copies of Any Amendments and Supplements to the Prospectus.
        The Company agrees to furnish the Underwriter, without charge, during
        the Prospectus Delivery Period, as many copies of the Prospectus and any
        amendments and supplements thereto (including any documents incorporated
        or deemed incorporated by reference therein) as the Underwriter may
        request.

               (e) Blue Sky Compliance. The Company shall cooperate with the
        Underwriter and counsel for the Underwriter to qualify or register the
        Common Shares for sale under (or obtain exemptions from the application
        of) the state securities or blue sky laws or Canadian provincial
        securities laws of those jurisdictions designated by the Underwriter,
        shall comply with such laws and shall continue such qualifications,
        registrations and exemptions in effect so long as required for the
        distribution of the Common Shares. The Company shall not be required to
        qualify as a foreign corporation or to take any action that would
        subject it to general service of process in any such jurisdiction where
        it is not presently qualified or where it would be subject to taxation
        as a foreign corporation. The Company will advise the Underwriter
        promptly of the suspension of the qualification or registration of (or
        any such exemption relating to) the Common Shares for offering, sale or
        trading in any jurisdiction or any initiation or threat of any
        proceeding for any such purpose, and in the event of the issuance of any
        order suspending such qualification, registration or exemption, the
        Company shall use its best efforts to obtain the withdrawal thereof at
        the earliest possible moment.

               (f) Use of Proceeds. The Company shall apply the net proceeds
        from the sale of the Common Shares sold by it in the manner described
        under the caption "Use of Proceeds" in the Prospectus.

               (g) Transfer Agent. The Company shall engage and maintain, at
        its expense, a registrar and transfer agent for the Common Stock.

                                       11
<PAGE>   13

               (h) Earnings Statement. As soon as practicable, the Company will
        make generally available to its security holders and to the Underwriter
        an earnings statement (which need not be audited) covering the
        twelve-month period ending on the final day of the quarter that includes
        the one year anniversary of the "effective date of the Registration
        Statement" (as defined in Rule 158(c) under the Securities Act), in
        satisfaction of Section 11(c) of the Securities Act.

               (i) Periodic Reporting Obligations. During the Prospectus
        Delivery Period the Company shall file, on a timely basis, with the
        Commission and the Nasdaq National Market all reports and documents
        required to be filed under the Exchange Act.

               (j) Company to Provide Copy of the Prospectus in Form That May Be
        Downloaded from the Internet. Upon the Underwriter's request, the
        Company shall cause to be prepared and delivered, at its expense, within
        one business day from the effective date of this Agreement, to the
        Underwriter an "electronic Prospectus" to be used by the Underwriter in
        connection with the offering and sale of the Common Shares. As used
        herein, the term "electronic Prospectus" means a form of Prospectus, and
        any amendment or supplement thereto, that meets each of the following
        conditions: (i) it shall be encoded in an electronic format,
        satisfactory to the Underwriter, that may be posted on the Internet;
        (ii) it shall disclose the same information as the paper Prospectus and
        Prospectus filed pursuant to EDGAR, except to the extent that graphic
        and image material cannot be disseminated electronically, in which case
        such graphic and image material shall be replaced in the electronic
        Prospectus with a fair and accurate narrative description or tabular
        representation of such material, as appropriate; and (iii) it shall be
        in or convertible into a paper format or an electronic format,
        satisfactory to the Underwriter, that will allow investors to store and
        have continuously ready access to the Prospectus at any future time,
        without charge to investors (other than any fee charged for subscription
        to the Internet as a whole and for on-line time). The Company hereby
        confirms that it has included or will include in the Prospectus filed
        pursuant to EDGAR or otherwise with the Commission an undertaking that,
        upon receipt of a request by an investor or his or her Underwriter
        within the Prospectus Delivery Period, the Company shall transmit or
        cause to be transmitted promptly, without charge, a paper copy of the
        Prospectus.

               (k) Agreement Not to Offer or Sell Additional Securities. During
        the period of 30 days following the date of the Prospectus, the Company
        will not, without the prior written consent of the Underwriter (which
        consent may be withheld at the sole discretion of the Underwriter),
        directly or indirectly, sell, offer, contract or grant any option to
        sell, pledge, transfer or establish an open "put equivalent position"
        within the meaning of Rule 16a-1(h) under the Exchange Act, or otherwise
        dispose of or transfer, or announce the offering of, or file any
        registration statement under the Securities Act in respect of, any
        shares of Common Stock, options or warrants to acquire shares of the
        Common Stock or securities exchangeable or exercisable for or
        convertible into shares of Common Stock (other than as contemplated by
        this Agreement with respect to the Common Shares); provided, however,
        that the Company may issue shares of its Common Stock or options to
        purchase its Common Stock, or Common Stock upon exercise of options,
        pursuant to any stock option, stock bonus or other stock plan or
        arrangement described in the Prospectus, but only if the holders of such
        shares, options, or shares issued upon exercise of such options, agree
        in writing not to sell, offer, dispose of or otherwise transfer any such
        shares or options during such 30 day period without the prior written
        consent of the Underwriter (which consent may be withheld at the sole
        discretion of the the Underwriter).

               (l) Future Reports to the Underwriter. During the period of five
        years hereafter the Company will furnish to the Underwriter at 600
        Montgomery Street, San Francisco, CA 94111, Attention: Rex Sherry: (i)
        as soon as practicable after the end of each fiscal year, copies of the

                                       12
<PAGE>   14

        Annual Report of the Company containing the balance sheet of the Company
        as of the close of such fiscal year and statements of income,
        stockholders' equity and cash flows for the year then ended and the
        opinion thereon of the Company's independent public or certified public
        accountants; (ii) as soon as practicable after the filing thereof,
        copies of each proxy statement, Annual Report on Form 10-K, Quarterly
        Report on Form 10-Q, Current Report on Form 8-K or other report filed by
        the Company with the Commission, the NASD or any securities exchange;
        and (iii) as soon as available, copies of any report or communication of
        the Company mailed generally to holders of its capital stock.

        SECTION 4. PAYMENT OF EXPENSES. The Company agrees to pay all costs,
fees and expenses incurred in connection with the performance of its obligations
hereunder and in connection with the transactions contemplated hereby, including
without limitation (i) all expenses incident to the issuance and delivery of the
Common Shares (including all printing and engraving costs), (ii) all fees and
expenses of the registrar and transfer agent of the Common Stock, (iii) all
necessary issue, transfer and other stamp taxes in connection with the issuance
and sale of the Common Shares to the Underwriter, (iv) all fees and expenses of
the Company's counsel, independent public or certified public accountants and
other advisors, (v) all costs and expenses incurred in connection with the
preparation, printing, filing, shipping and distribution of the Registration
Statement (including financial statements, exhibits, schedules, consents and
certificates of experts), each preliminary prospectus and the Prospectus, and
all amendments and supplements thereto, and this Agreement, (vi) all filing
fees, attorneys' fees and expenses incurred by the Company or the Underwriter in
connection with qualifying or registering (or obtaining exemptions from the
qualification or registration of) all or any part of the Common Shares for offer
and sale under the state securities or blue sky laws or the provincial
securities laws of Canada, and, if requested by the Underwriter, preparing and
printing a "Blue Sky Survey" or memorandum, and any supplements thereto,
advising the Underwriter of such qualifications, registrations and exemptions,
(vii) the fees and expenses associated with including the Common Shares on the
Nasdaq National Market, and (viii) all other fees, costs and expenses referred
to in Item 14 of Part II of the Registration Statement. Except as provided in
this Section 4, Section 6, Section 8 and Section 9 hereof, the Underwriter shall
pay its own expenses, including the fees and disbursements of their counsel.

        SECTION 5. CONDITIONS OF THE OBLIGATIONS OF THE UNDERWRITER. The
obligations of the Underwriter to purchase and pay for the Common Shares as
provided herein on the First Closing Date and, with respect to the Optional
Common Shares, the Second Closing Date, shall be subject to the accuracy of the
representations and warranties on the part of the Company set forth in Section 1
hereof as of the date hereof and as of the First Closing Date as though then
made and, with respect to the Optional Common Shares, as of the Second Closing
Date as though then made, to the timely performance by the Company of its
covenants and other obligations hereunder, and to each of the following
additional conditions:

               (a) Accountants' Comfort Letter. On the First Closing Date, the
        Underwriter shall have received from the Accountants a letter dated as
        of such date addressed to the Underwriter, in form and substance
        satisfactory to the Underwriter, containing statements and information
        of the type ordinarily included in accountant's "comfort letters" to
        Underwriter, delivered according to Statement of Auditing Standards
        ("SAS") No. 72 (or any successor bulletin), with respect to the audited
        and unaudited financial statements and certain financial information
        contained in the Registration Statement and the Prospectus.

               (b) Compliance with Registration Requirements; No Stop Order; No
        Objection from NASD. For the period from and after effectiveness of this
        Agreement and prior to the First Closing Date and, with respect to the
        Optional Common Shares, the Second Closing Date:

                                       13
<PAGE>   15

                      (i) the Company shall have filed the Prospectus with the
               Commission (including the information required by Rule 430A under
               the Securities Act) in the manner and within the time period
               required by Rule 424(b) under the Securities Act; or the Company
               shall have filed a post-effective amendment to the Registration
               Statement containing the information required by such Rule 430A,
               and such post-effective amendment shall have become effective;

                      (ii) no stop order suspending the effectiveness of the
               Registration Statement, any Rule 462(b) Registration Statement,
               or any post-effective amendment to the Registration Statement,
               shall be in effect and no proceedings for such purpose shall have
               been instituted or threatened by the Commission; and

                      (iii) the NASD shall have raised no objection to the
               fairness and reasonableness of the underwriting terms and
               arrangements.

               (c) No Material Adverse Change. For the period from and after the
        date of this Agreement and prior to the First Closing Date and, with
        respect to the Optional Common Shares, the Second Closing Date, in the
        judgment of the Underwriter there shall not have occurred any Material
        Adverse Change.

               (d) Opinion of Counsel for the Company. On each of the First
        Closing Date and the Second Closing Date the Underwriter shall have
        received the favorable opinion of Morrison and Forrester LLP, counsel
        for the Company, dated as of such Closing Date, the form of which is
        attached as Exhibit A.

               (e) Opinion of Intellectual Property Counsel for the Company. On
        each of the First Closing Date and the Second Closing Date the
        Underwriter shall have received the favorable opinion of _____________,
        intellectual property counsel for the Company, dated as of such Closing
        Date, the form of which is attached as Exhibit B.

               (f) Opinion of Counsel for the Underwriter. On each of the First
        Closing Date and the Second Closing Date the Underwriter shall have
        received the favorable opinion of O'Melveny & Myers LLP, counsel for the
        Underwriter, dated as of such Closing Date, in form and substance
        satisfactory to the Underwriter, with respect to the sufficiency of all
        such corporate proceedings and other legal matters relating to this
        Agreement and the transactions contemplated hereby as the Underwriter
        may reasonably require (and the Underwriter shall have received such
        additional number of conformed copies of such counsel's legal opinion as
        the Underwriter may reasonably request for each of the several
        Underwriter). The Company shall have furnished to such counsel such
        documents as they may have reasonably requested for the purpose of
        enabling them to pass upon such matters.

               (g) Officers' Certificate. On each of the First Closing Date and
        the Second Closing Date the Underwriter shall have received a written
        certificate executed by the Chairman of the Board, Chief Executive
        Officer or President of the Company and the Chief Financial Officer or
        Chief Accounting Officer of the Company, dated as of such Closing Date,
        to the effect set forth in subsections (b)(ii) of this Section 5, and
        further to the effect that:

                      (i) for the period from and after the date of this
               Agreement and prior to such Closing Date, there has not occurred
               any Material Adverse Change;

                                       14
<PAGE>   16

                      (ii) the representations, warranties and covenants of the
               Company set forth in Section 1 of this Agreement are true and
               correct with the same force and effect as though expressly made
               on and as of such Closing Date; and

                      (iii) the Company has complied with all the agreements
               hereunder and satisfied all the conditions on its part to be
               performed or satisfied hereunder at or prior to such Closing
               Date.

               (h) Bring-down Comfort Letter. On the Second Closing Date the
        Underwriter shall have received from the Accountants a letter dated such
        date, in form and substance satisfactory to the Underwriter, to the
        effect that they reaffirm the statements made in the letter furnished by
        them pursuant to subsection (a) of this Section 5, except that the
        specified date referred to therein for the carrying out of procedures
        shall be no more than five business days prior to the First Closing Date
        or Second Closing Date, as the case may be.

               (i) Lock-Up Agreement from Certain Securityholders of the
        Company. On the First Closing Date, the Company shall have furnished to
        the Underwriter an agreement in the form of Exhibit C hereto from each
        executive officer of the Company and such agreements shall be in full
        force and effect.

               (j) Additional Documents. On or before each of the First Closing
        Date and the Second Closing Date, the Underwriter and counsel for the
        Underwriter shall have received such information, documents and opinions
        as they may reasonably require for the purposes of enabling them to pass
        upon the issuance and sale of the Common Shares as contemplated herein,
        or in order to evidence the accuracy of any of the representations and
        warranties, or the satisfaction of any of the conditions or agreements,
        herein contained.

               If any condition specified in this Section 5 is not satisfied
when and as required to be satisfied, this Agreement may be terminated by the
Underwriter by notice to the Company at any time on or prior to the First
Closing Date and, with respect to the Optional Common Shares, at any time prior
to the Second Closing Date, which termination shall be without liability on the
part of any party to any other party, except that Section 4, Section 6, Section
8 and Section 9 shall at all times be effective and shall survive such
termination.

        SECTION 6.    REIMBURSEMENT OF UNDERWRITER'S EXPENSES.

               If this Agreement is terminated by the Underwriter pursuant to
Section 5, Section 7 or Section 11, or if the sale to the Underwriter of the
Common Shares on the First Closing Date is not consummated because of any
refusal, inability or failure on the part of the Company to perform any
agreement herein or to comply with any provision hereof, the Company agrees to
reimburse the Underwriter upon demand for all out-of-pocket expenses that shall
have been reasonably incurred by the Underwriter in connection with the proposed
purchase and the offering and sale of the Common Shares, including but not
limited to fees and disbursements of counsel, printing expenses, travel
expenses, postage, facsimile and telephone charges.

        SECTION 7.    EFFECTIVENESS OF THIS AGREEMENT.

               This Agreement shall not become effective until the later of (i)
the execution of this Agreement by the parties hereto and (ii) notification by
the Commission to the Company and the Underwriter of the effectiveness of the
Registration Statement under the Securities Act.

                                       15
<PAGE>   17

               Prior to such effectiveness, this Agreement may be terminated by
any party by notice to each of the other parties hereto, and any such
termination shall be without liability on the part of (a) the Company to the
Underwriter, except that the Company shall be obligated to reimburse the
expenses of the Underwriter pursuant to Sections 4 and 6 hereof, or (b) the
Underwriter to the Company, except that the provisions of Section 8 and Section
9 shall at all times be effective and shall survive such termination.

        SECTION 8.    INDEMNIFICATION.

                (a) Indemnification of the Underwriter. The Company agrees to
        indemnify and hold harmless the Underwriter, its officers and employees,
        and each person, if any, who controls the Underwriter within the meaning
        of the Securities Act and the Exchange Act against any loss, claim,
        damage, liability or expense, as incurred, to which the Underwriter or
        such controlling person may become subject, under the Securities Act,
        the Exchange Act or other federal or state statutory law or regulation,
        or at common law or otherwise (including in settlement of any
        litigation, if such settlement is effected with the written consent of
        the Company), insofar as such loss, claim, damage, liability or expense
        (or actions in respect thereof as contemplated below) arises out of or
        is based (i) upon any untrue statement or alleged untrue statement of a
        material fact contained in the Registration Statement, or any amendment
        thereto, including any information deemed to be a part thereof pursuant
        to Rule 430A or Rule 434 under the Securities Act, or the omission or
        alleged omission therefrom of a material fact required to be stated
        therein or necessary to make the statements therein not misleading; or
        (ii) upon any untrue statement or alleged untrue statement of a material
        fact contained in any preliminary prospectus or the Prospectus (or any
        amendment or supplement thereto), or the omission or alleged omission
        therefrom of a material fact necessary in order to make the statements
        therein, in the light of the circumstances under which they were made,
        not misleading; or (iii) in whole or in part upon any inaccuracy in the
        representations and warranties of the Company contained herein; or (iv)
        in whole or in part upon any failure of the Company to perform its
        obligations hereunder or under law; or (v) any act or failure to act or
        any alleged act or failure to act by the Underwriter in connection with,
        or relating in any manner to, the Common Stock or the offering
        contemplated hereby, and which is included as part of or referred to in
        any loss, claim, damage, liability or action arising out of or based
        upon any matter covered by clause (i) or (ii) above, provided that the
        Company shall not be liable under this clause (v) to the extent that a
        court of competent jurisdiction shall have determined by a final
        judgment that such loss, claim, damage, liability or action resulted
        directly from any such acts or failures to act undertaken or omitted to
        be taken by the Underwriter through its bad faith or willful misconduct;
        and to reimburse the Underwriter and each such controlling person for
        any and all expenses (including the fees and disbursements of counsel
        chosen by the Underwriter) as such expenses are reasonably incurred by
        the Underwriter or such controlling person in connection with
        investigating, defending, settling, compromising or paying any such
        loss, claim, damage, liability, expense or action; provided, however,
        that the foregoing indemnity agreement shall not apply to any loss,
        claim, damage, liability or expense to the extent, but only to the
        extent, that such loss, claim, damage, liability or expense arises out
        of or is based upon any untrue statement or alleged untrue statement or
        omission or alleged omission made in reliance upon and in conformity
        with written information furnished to the Company by the Underwriter
        expressly for use in the Registration Statement, any preliminary
        prospectus or the Prospectus (or any amendment or supplement thereto);
        and provided, further, that with respect to any preliminary prospectus,
        the foregoing indemnity agreement shall not inure to the benefit of the
        Underwriter or any person controlling such Underwriter, if copies of the
        Prospectus were timely delivered to the Underwriter pursuant to Section
        2 and a copy of the Prospectus (as then amended or supplemented if the
        Company shall have furnished any amendments or supplements thereto) was
        not sent or given by or on behalf of the Underwriter to the person
        asserting the loss, claim, damage, liability or expense, if required by
        law so to have been delivered, at or prior to the

                                       16
<PAGE>   18

        written confirmation of the sale of the Common Shares to such person,
        and if the Prospectus (as so amended or supplemented) would have cured
        the defect giving rise to such loss, claim, damage, liability or
        expense. The indemnity agreement set forth in this Section 8(a) shall be
        in addition to any liabilities that the Company may otherwise have.

               (b) Indemnification of the Company, Its Directors and Officers.
        Each Underwriter agrees, severally and not jointly, to indemnify and
        hold harmless the Company, each of its directors, each of its officers
        who signed the Registration Statement and each person, if any, who
        controls the Company within the meaning of the Securities Act or the
        Exchange Act, against any loss, claim, damage, liability or expense, as
        incurred, to which the Company, or any such director, officer or
        controlling person may become subject, under the Securities Act, the
        Exchange Act, or other federal or state statutory law or regulation, or
        at common law or otherwise (including in settlement of any litigation,
        if such settlement is effected with the written consent of such
        Underwriter), insofar as such loss, claim, damage, liability or expense
        (or actions in respect thereof as contemplated below) arises out of or
        is based upon any untrue or alleged untrue statement of a material fact
        contained in the Registration Statement, any preliminary prospectus or
        the Prospectus (or any amendment or supplement thereto), or arises out
        of or is based upon the omission or alleged omission to state therein a
        material fact required to be stated therein or necessary to make the
        statements therein not misleading, in each case to the extent, but only
        to the extent, that such untrue statement or alleged untrue statement or
        omission or alleged omission was made in the Registration Statement, any
        preliminary prospectus, the Prospectus (or any amendment or supplement
        thereto), in reliance upon and in conformity with written information
        furnished to the Company by the Underwriter expressly for use therein;
        and to reimburse the Company, or any such director, officer or
        controlling person for any legal and other expense reasonably incurred
        by the Company, or any such director, officer or controlling person in
        connection with investigating, defending, settling, compromising or
        paying any such loss, claim, damage, liability, expense or action. The
        Company hereby acknowledges that the only information that the
        Underwriter furnished to the Company expressly for use in the
        Registration Statement, any preliminary prospectus or the Prospectus (or
        any amendment or supplement thereto) are the statements set forth in the
        third and ninth paragraphs under the caption "Underwriting" in the
        Prospectus; and the Underwriter confirms that such statements are
        correct. The indemnity agreement set forth in this Section 8(b) shall be
        in addition to any liabilities that each Underwriter may otherwise have.

               (c) Notifications and Other Indemnification Procedures. Promptly
        after receipt by an indemnified party under this Section 8 of notice of
        the commencement of any action, such indemnified party will, if a claim
        in respect thereof is to be made against an indemnifying party under
        this Section 8, notify the indemnifying party in writing of the
        commencement thereof, but the omission so to notify the indemnifying
        party shall not relieve it from any liability hereunder to the extent it
        is not materially prejudiced as a proximate result of such failure and
        in any event shall not relieve it from any liability which it may have
        otherwise than on account of this indemnity agreement. In case any such
        action is brought against any indemnified party and such indemnified
        party seeks or intends to seek indemnity from an indemnifying party, the
        indemnifying party will be entitled to participate in, and, to the
        extent that it shall elect, jointly with all other indemnifying parties
        similarly notified, by written notice delivered to the indemnified party
        promptly after receiving the aforesaid notice from such indemnified
        party, to assume the defense thereof with counsel reasonably
        satisfactory to such indemnified party; provided, however, if the
        defendants in any such action include both the indemnified party and the
        indemnifying party and the indemnified party shall have reasonably
        concluded that a conflict may arise between the positions of the
        indemnifying party and the indemnified party in conducting the defense
        of any such action or that there may be legal defenses available to it

                                       17
<PAGE>   19

        and/or other indemnified parties which are different from or additional
        to those available to the indemnifying party, the indemnified party or
        parties shall have the right to select separate counsel to assume such
        legal defenses and to otherwise participate in the defense of such
        action on behalf of such indemnified party or parties. Upon receipt of
        notice from the indemnifying party to such indemnified party of such
        indemnifying party's election so to assume the defense of such action
        and approval by the indemnified party of counsel, the indemnifying party
        will not be liable to such indemnified party under this Section 8 for
        any legal or other expenses subsequently incurred by such indemnified
        party in connection with the defense thereof unless (i) the indemnified
        party shall have employed separate counsel in accordance with the
        proviso to the next preceding sentence (it being understood, however,
        that the indemnifying party shall not be liable for the expenses of more
        than one separate counsel (together with local counsel), approved by the
        indemnifying party (the Underwriter in the case of Section 8(b) and
        Section 9), representing the indemnified parties who are parties to such
        action) or (ii) the indemnifying party shall not have employed counsel
        satisfactory to the indemnified party to represent the indemnified party
        within a reasonable time after notice of commencement of the action, in
        each of which cases the fees and expenses of counsel shall be at the
        expense of the indemnifying party.

               (d) Settlements. The indemnifying party under this Section 8
        shall not be liable for any settlement of any proceeding effected
        without its written consent, but if settled with such consent or if
        there be a final judgment for the plaintiff, the indemnifying party
        agrees to indemnify the indemnified party against any loss, claim,
        damage, liability or expense by reason of such settlement or judgment.
        Notwithstanding the foregoing sentence, if at any time an indemnified
        party shall have requested an indemnifying party to reimburse the
        indemnified party for fees and expenses of counsel as contemplated by
        Section 8(c) hereof, the indemnifying party agrees that it shall be
        liable for any settlement of any proceeding effected without its written
        consent if (i) such settlement is entered into more than 30 days after
        receipt by such indemnifying party of the aforesaid request and (ii)
        such indemnifying party shall not have reimbursed the indemnified party
        in accordance with such request prior to the date of such settlement. No
        indemnifying party shall, without the prior written consent of the
        indemnified party, effect any settlement, compromise or consent to the
        entry of judgment in any pending or threatened action, suit or
        proceeding in respect of which any indemnified party is or could have
        been a party and indemnity was or could have been sought hereunder by
        such indemnified party, unless such settlement, compromise or consent
        includes an unconditional release of such indemnified party from all
        liability on claims that are the subject matter of such action, suit or
        proceeding.

        SECTION 9.    CONTRIBUTION.

               If the indemnification provided for in Section 8 is for any
reason held to be unavailable to or otherwise insufficient to hold harmless an
indemnified party in respect of any losses, claims, damages, liabilities or
expenses referred to therein, then each indemnifying party shall contribute to
the aggregate amount paid or payable by such indemnified party, as incurred, as
a result of any losses, claims, damages, liabilities or expenses referred to
therein (i) in such proportion as is appropriate to reflect the relative
benefits received by the Company, on the one hand, and the Underwriter, on the
other hand, from the offering of the Common Shares pursuant to this Agreement or
(ii) if the allocation provided by clause (i) above is not permitted by
applicable law, in such proportion as is appropriate to reflect not only the
relative benefits referred to in clause (i) above but also the relative fault of
the Company, on the one hand, and the Underwriter, on the other hand, in
connection with the statements or omissions or inaccuracies in the
representations and warranties herein which resulted in such losses, claims,
damages, liabilities or expenses, as well as any other relevant equitable
considerations. The relative benefits received by the Company, on the one hand,
and the Underwriter, on the other hand, in connection with the offering of the
Common Shares pursuant to this Agreement shall be deemed to be in the same
respective proportions as

                                       18
<PAGE>   20

the total net proceeds from the offering of the Common Shares pursuant to this
Agreement (before deducting expenses) received by the Company, and the total
underwriting discount received by the Underwriter, in each case as set forth in
the Prospectus bear to the aggregate initial public offering price of the Common
Shares as set forth in the Prospectus cover. The relative fault of the Company,
on the one hand, and the Underwriter, on the other hand, shall be determined by
reference to, among other things, whether any such untrue or alleged untrue
statement of a material fact or omission or alleged omission to state a material
fact or any such inaccurate or alleged inaccurate representation or warranty
relates to information supplied by the Company, on the one hand, or the
Underwriter, on the other hand, and the parties' relative intent, knowledge,
access to information and opportunity to correct or prevent such statement or
omission.

               The amount paid or payable by a party as a result of the losses,
claims, damages, liabilities and expenses referred to above shall be deemed to
include, subject to the limitations set forth in Section 8(c), any legal or
other fees or expenses reasonably incurred by such party in connection with
investigating or defending any action or claim. The provisions set forth in
Section 8(c) with respect to notice of commencement of any action shall apply if
a claim for contribution is to be made under this Section 9; provided, however,
that no additional notice shall be required with respect to any action for which
notice has been given under Section 8(c) for purposes of indemnification.

               The Company and the Underwriter agree that it would not be just
and equitable if contribution pursuant to this Section 9 were determined by pro
rata allocation (even if the Underwriter were treated as one entity for such
purpose) or by any other method of allocation which does not take account of the
equitable considerations referred to in this Section 9.

               Notwithstanding the provisions of this Section 9, the Underwriter
shall not be required to contribute any amount in excess of the underwriting
commissions received by it in connection with the Common Shares underwritten by
it and distributed to the public. No person guilty of fraudulent
misrepresentation (within the meaning of Section 11(f) of the Securities Act)
shall be entitled to contribution from any person who was not guilty of such
fraudulent misrepresentation. For purposes of this Section 9, each officer and
employee of the Underwriter and each person, if any, who controls the
Underwriter within the meaning of the Securities Act and the Exchange Act shall
have the same rights to contribution as the Underwriter, and each director of
the Company, each officer of the Company who signed the Registration Statement,
and each person, if any, who controls the Company with the meaning of the
Securities Act and the Exchange Act shall have the same rights to contribution
as the Company.

        SECTION 10.   [RESERVED]

        SECTION 11.   TERMINATION OF THIS AGREEMENT. Prior to the First Closing
Date this Agreement may be terminated by the Underwriter by notice given to the
Company if at any time (i) trading or quotation in any of the Company's
securities shall have been suspended or limited by the Commission or by the
Nasdaq National Market, or trading in securities generally on either the Nasdaq
Stock Market or the New York Stock Exchange shall have been suspended or
limited, or minimum or maximum prices shall have been generally established on
any of such stock exchanges by the Commission or the NASD; (ii) a general
banking moratorium shall have been declared by any of federal, New York or
California authorities; (iii) there shall have occurred any outbreak or
escalation of national or international hostilities or any crisis or calamity,
or any change in the United States or international financial markets, or any
substantial change or development involving a prospective substantial change in
United States' or international political, financial or economic conditions, as
in the judgment of the Underwriter is material and adverse and makes it
impracticable to market the Common Shares in the manner and on the terms
described in the Prospectus or to enforce contracts for the sale of securities;
(iv) in the judgment of the Underwriter there shall have occurred any Material
Adverse Change; or (v) the

                                       19
<PAGE>   21

Company shall have sustained a loss by strike, fire, flood, earthquake, accident
or other calamity of such character as in the judgment of the Underwriter may
interfere materially with the conduct of the business and operations of the
Company regardless of whether or not such loss shall have been insured. Any
termination pursuant to this Section 11 shall be without liability on the part
of (a) the Company to the Underwriter, except that the Company shall be
obligated to reimburse the expenses of the Underwriter pursuant to Sections 4
and 6 hereof, or (b) the Underwriter to the Company, except that the provisions
of Section 8 and Section 9 shall at all times be effective and shall survive
such termination.

        SECTION 12.    REPRESENTATIONS AND INDEMNITIES TO SURVIVE DELIVERY. The
respective indemnities, agreements, representations, warranties and other
statements of the Company, of its officers and of the Underwriter set forth in
or made pursuant to this Agreement will remain in full force and effect,
regardless of any investigation made by or on behalf of the Underwriter or the
Company or any of their partners, officers or directors or any controlling
person, as the case may be, and will survive delivery of and payment for the
Common Shares sold hereunder and any termination of this Agreement.

        SECTION 13.    NOTICES. All communications hereunder shall be in writing
and shall be mailed, hand delivered or telecopied and confirmed to the parties
hereto as follows:

If to the Underwriter:

        Banc of America Securities LLC
        600 Montgomery Street
        San Francisco, California 94111
        Facsimile:  415-913-5558
        Attention:  Richard A. Smith

with a copy to:

        Banc of America Securities LLC
        600 Montgomery Street
        San Francisco, California  94111
        Facsimile:  (415) 913-5553
        Attention:  Jeffrey R. Lapic, Esq.

with a copy to:

        O'Melveny & Myers LLP
        275 Battery Street, Suite 2600
        San Francisco, California  94111-3305
        Facsimile:  (415) 984-8701
        Attention:  Peter T. Healy, Esq.

If to the Company:

        Novellus Systems, Inc.
        3970 North First Street,
        San Jose, California 95134
        Facsimile:  (408) 943-2277
        Attention:  Robert H. Smith,


                                       20
<PAGE>   22


with a copy to:

        Morrison & Foerster LLP
        755 Page Mill Road
        Palo Alto, California 94304
        Facsimile:  (650) 494-0792
        Attention: William D. Sherman, Esq.

Any party hereto may change the address for receipt of communications by giving
written notice to the others.

        SECTION 14. SUCCESSORS. This Agreement will inure to the benefit of and
be binding upon the parties hereto and to the benefit of the employees, officers
and directors and controlling persons referred to in Section 8 and Section 9,
and in each case their respective successors, and no other person will have any
right or obligation hereunder. The term "successors" shall not include any
purchaser of the Common Shares as such from any of the Underwriter merely by
reason of such purchase.

        SECTION 15. PARTIAL UNENFORCEABILITY. The invalidity or unenforceability
of any Section, paragraph or provision of this Agreement shall not affect the
validity or enforceability of any other Section, paragraph or provision hereof.
If any Section, paragraph or provision of this Agreement is for any reason
determined to be invalid or unenforceable, there shall be deemed to be made such
minor changes (and only such minor changes) as are necessary to make it valid
and enforceable.

        SECTION 16. GOVERNING LAW PROVISIONS.

               (a) Choice of Law. THIS AGREEMENT SHALL BE GOVERNED BY AND
        CONSTRUED IN ACCORDANCE WITH THE INTERNAL LAWS OF THE STATE OF
        CALIFORNIA APPLICABLE TO AGREEMENTS MADE AND TO BE PERFORMED IN SUCH
        STATE.

               (b) Consent to Jurisdiction. Any legal suit, action or proceeding
        arising out of or based upon this Agreement or the transactions
        contemplated hereby ("Related Proceedings") may be instituted in the
        federal courts of the United States of America located in the City and
        County of San Francisco or the courts of the State of California in each
        case located in the City and County of San Francisco (collectively, the
        "Specified Courts"), and each party irrevocably submits to the exclusive
        jurisdiction (except for proceedings instituted in regard to the
        enforcement of a judgment of any such court (a "Related Judgment"), as
        to which such jurisdiction is non-exclusive) of such courts in any such
        suit, action or proceeding. Service of any process, summons, notice or
        document by mail to such party's address set forth above shall be
        effective service of process for any suit, action or other proceeding
        brought in any such court. The parties irrevocably and unconditionally
        waive any objection to the laying of venue of any suit, action or other
        proceeding in the Specified Courts and irrevocably and unconditionally
        waive and agree not to plead or claim in any such court that any such
        suit, action or other proceeding brought in any such court has been
        brought in an inconvenient forum.

        SECTION 17. GENERAL PROVISIONS. This Agreement constitutes the entire
agreement of the parties to this Agreement and supersedes all prior written or
oral and all contemporaneous oral agreements, understandings and negotiations
with respect to the subject matter hereof. This Agreement may be executed in two
or more counterparts, each one of which shall be an original, with the same
effect as if the signatures thereto and hereto were upon the same instrument.
This Agreement may not be amended or modified unless in writing by all of the
parties hereto, and no condition herein (express or

                                       21
<PAGE>   23


implied) may be waived unless waived in writing by each party whom the condition
is meant to benefit. The Section headings herein are for the convenience of the
parties only and shall not affect the construction or interpretation of this
Agreement.

               Each of the parties hereto acknowledges that it is a
sophisticated business person who was adequately represented by counsel during
negotiations regarding the provisions hereof, including, without limitation, the
indemnification provisions of Section 8 and the contribution provisions of
Section 9, and is fully informed regarding said provisions. Each of the parties
hereto further acknowledges that the provisions of Sections 8 and 9 hereto
fairly allocate the risks in light of the ability of the parties to investigate
the Company, its affairs and its business in order to assure that adequate
disclosure has been made in the Registration Statement, any preliminary
prospectus and the Prospectus (and any amendments and supplements thereto), as
required by the Securities Act and the Exchange Act.

                                       22
<PAGE>   24


               If the foregoing is in accordance with your understanding of our
agreement, kindly sign and return to the Company the enclosed copies hereof,
whereupon this instrument, along with all counterparts hereof, shall become a
binding agreement in accordance with its terms.

                                           Very truly yours,

                                           NOVELLUS SYSTEMS, INC.



                                           By:
                                              ----------------------------------
                                                   Robert H. Smith
                                                   Executive Vice President and
                                                   Chief Financial Officer



               The foregoing Underwriting Agreement is hereby confirmed and
accepted by the Underwriter in San Francisco, California as of the date first
above written.

BANC OF AMERICA SECURITIES LLC



By:
   ------------------------------------
        Rex Sherry
        Managing Director


                                      S-1
<PAGE>   25


                                    EXHIBIT A

                     MATTERS TO BE COVERED IN THE OPINION OF
                             COUNSEL FOR THE COMPANY


               (i) The Company has been duly incorporated and is validly
       existing as a corporation in good standing under the laws of the State of
       California.

               (ii) The Company has corporate power and authority to own, lease
       and operate its properties and to conduct its business as described in
       the Prospectus and to enter into and perform its obligations under the
       Underwriting Agreement.

               (iii) The Company is duly qualified as a foreign corporation to
       transact business and is in good standing in each other jurisdiction in
       which such qualification is required, whether by reason of the ownership
       or leasing of property or the conduct of business, except for such
       jurisdictions where the failure to so qualify or to be in good standing
       would not, individually or in the aggregate, result in a Material Adverse
       Change.

               (iv) Nippon Novellus Systems, KK has been duly incorporated and
       is validly existing as a corporation in good standing under the laws of
       Japan, has corporate power and authority to own, lease and operate its
       properties and to conduct its business as described in the Prospectus
       and, to the best knowledge of such counsel, is duly qualified as a
       foreign corporation to transact business and is in good standing in each
       jurisdiction in which such qualification is required, whether by reason
       of the ownership or leasing of property or the conduct of business,
       except for such jurisdictions where the failure to so qualify or to be in
       good standing would not, individually or in the aggregate, result in a
       Material Adverse Change.

               (v) All of the issued and outstanding capital stock of Nippon
       Novellus Systems, KK has been duly authorized and validly issued, is
       fully paid and non-assessable and is owned by the Company, directly or
       through subsidiaries, free and clear of any security interest, mortgage,
       pledge, lien, encumbrance or, to the best knowledge of such counsel, any
       pending or threatened claim.

               (vi) The authorized, issued and outstanding capital stock of the
       Company (including the Common Stock) conform to the descriptions thereof
       set forth or incorporated by reference in the Prospectus. All of the
       outstanding shares of Common Stock have been duly authorized and validly
       issued, are fully paid and nonassessable and, to the best of such
       counsel's knowledge, have been issued in compliance with the registration
       and qualification requirements of federal and state securities laws. The
       form of certificate used to evidence the Common Stock is in due and
       proper form and complies with all applicable requirements of the charter
       and by-laws of the Company and the General Corporation Law of the State
       of California.

               (vii) No stockholder of the Company or any other person has any
       preemptive right, right of first refusal or other similar right to
       subscribe for or purchase securities of the Company arising (i) by
       operation of the charter or by-laws of the Company or the General
       Corporation Law of the State of California or (ii) to the best knowledge
       of such counsel, otherwise.

               (viii) The Underwriting Agreement has been duly authorized,
       executed and delivered by, and is a valid and binding agreement of, the
       Company, enforceable in accordance with its terms, except as rights to
       indemnification thereunder may be limited by applicable law and except

                                       A-1
<PAGE>   26

       as the enforcement thereof may be limited by bankruptcy, insolvency,
       reorganization, moratorium or other similar laws relating to or
       affecting creditors' rights generally or by general equitable
       principles.

               (ix) The Common Shares to be purchased by the Underwriter from
       the Company have been duly authorized for issuance and sale pursuant to
       the Underwriting Agreement and, when issued and delivered by the Company
       pursuant to the Underwriting Agreement against payment of the
       consideration set forth therein, will be validly issued, fully paid and
       nonassessable.

               (x) Each of the Registration Statement and the Rule 462(b)
       Registration Statement, if any, has been declared effective by the
       Commission under the Securities Act. To the best knowledge of such
       counsel, no stop order suspending the effectiveness of either of the
       Registration Statement or the Rule 462(b) Registration Statement, if any,
       has been issued under the Securities Act and no proceedings for such
       purpose have been instituted or are pending or are contemplated or
       threatened by the Commission. Any required filing of the Prospectus and
       any supplement thereto pursuant to Rule 424(b) under the Securities Act
       has been made in the manner and within the time period required by such
       Rule 424(b).

               (xi) The Registration Statement, including any Rule 462(b)
       Registration Statement, the Prospectus including any document
       incorporated by reference therein, and each amendment or supplement to
       the Registration Statement and the Prospectus including any document
       incorporated by reference therein, as of their respective effective or
       issue dates (other than the financial statements and supporting schedules
       included or incorporated by reference therein or in exhibits to or
       excluded from the Registration Statement, as to which no opinion need be
       rendered) comply as to form in all material respects with the applicable
       requirements of the Securities Act and the Exchange Act.

               (xii) The Common Shares have been included in the Nasdaq
       National Market.

               (xiii) Such counsel has reviewed the statements (i) in the
       Prospectus under the caption "Description of Securities," (ii) in Item 15
       (Indemnification of Directors and Officers) of the Registration
       Statement, (iii) in the Prospectus under the caption "Risk Factors--Our
       pending litigation and other potential litigation may harm our operating
       results," and (iv) in the Annual Report on Form 10-K for the Year Ended
       December 31, 1999 (the "Form 10-K") under the caption "Item 3. Legal
       Proceeding." Insofar as such statements constitute matters of law,
       summaries of legal matters, the Company's charter or by-law provisions,
       documents or legal proceedings, or legal conclusions, (a) the statements
       in (i) and (ii) above fairly present and summarize, in all material
       respects, the matters referred to therein; and (b) nothing has come to
       such counsel's attention which would lead them to believe that the
       statements in (iii) and (iv) above do not also fairly present and
       summarize, in all material respects, the matters referred to therein.

               (xiv) To the best knowledge of such counsel, there are no legal
       or governmental actions, suits or proceedings pending or threatened which
       are required to be disclosed in the Registration Statement, other than
       those disclosed (or incorporated by reference) therein.

               (xv) To the best knowledge of such counsel, there are no Existing
       Instruments required to be described or referred to in the Registration
       Statement or to be filed as exhibits thereto other than those described
       or referred to therein or filed or incorporated by reference as exhibits
       thereto; and the descriptions thereof and references thereto are correct
       in all material respects.

                                       A-2
<PAGE>   27

               (xvi) No consent, approval, authorization or other order of, or
       registration or filing with, any court or other governmental authority or
       agency, is required for the Company's execution, delivery and performance
       of the Underwriting Agreement and consummation of the transactions
       contemplated thereby and by the Prospectus, except as may be required
       under the Securities Act and applicable state securities or blue sky
       laws.

              (xvii) The execution and delivery of the Underwriting Agreement by
       the Company and the performance by the Company of its obligations
       thereunder (other than performance by the Company of its obligations
       under the indemnification section of the Underwriting Agreement, as to
       which no opinion need be rendered) (i) have been duly authorized by all
       necessary corporate action on the part of the Company; (ii) will not
       result in any violation of the provisions of the charter or by-laws of
       the Company or any subsidiary; (iii) will not constitute a breach of, or
       Default under, or result in the creation or imposition of any lien,
       charge or encumbrance upon any property or assets of the Company or any
       of its subsidiaries pursuant to, (A) any of the Company's agreements
       included (or incorporated by reference) as exhibits to the Form 10-K, or
       (B) to the best knowledge of such counsel, any other material Existing
       Instrument; or (iv) to the best knowledge of such counsel, will not
       result in any violation of any law, administrative regulation or
       administrative or court decree applicable to the Company or any
       subsidiary.

               (xviii) The Company is not, and after receipt of payment for the
       Common Shares will not be, an "investment company" within the meaning of
       Investment Company Act.

               (xix) To the best knowledge of such counsel, there are no persons
       with registration or other similar rights to have any equity or debt
       securities registered for sale under the Registration Statement or
       included in the offering contemplated by the Underwriting Agreement,
       except for such rights as have been duly waived.

               (xx) To the best knowledge of such counsel, the Company is not in
       violation of its charter or by-laws or any law, administrative regulation
       or administrative or court decree applicable to the Company or is in
       Default in the performance or observance of any obligation, agreement,
       covenant or condition contained in any material Existing Instrument,
       except in each such case for such violations or Defaults as would not,
       individually or in the aggregate, result in a Material Adverse Change.

               (xxi) To the best knowledge of such counsel, Nippon Novellus
       Systems, KK is not in violation of its charter or by-laws or any law,
       administrative regulation or administrative or court decree applicable
       Nippon Novellus Systems, KK nor is it in default in the performance or
       observance of any obligation, agreement, covenant or condition contained
       in any material existing instrument, except in each such case for such
       violations or defaults as would not, individually or in the aggregate,
       result in a material adverse change, in the condition, financial or
       otherwise, or in the earnings, business, operations or prospects, whether
       or not arising from transactions in the ordinary course of business, of
       the Company and its subsidiaries, considered as one entity.

              In addition, such counsel shall state that they have participated
       in conferences with officers of the Company and representatives of the
       independent public or certified public accountants for the Company at
       which the contents of the Registration Statement and the Prospectus, and
       any supplements or amendments thereto, and related matters were discussed
       and, although such counsel is not passing upon and does not assume any
       responsibility for the accuracy, completeness or fairness of the
       statements contained in the Registration Statement or the Prospectus
       (other than as specified above), and any supplements or amendments
       thereto, on the basis of the foregoing, nothing has come to their
       attention which would lead them to believe that

                                      A-3
<PAGE>   28

       either the Registration Statement (including the information incorporated
       therein by reference), or any amendments thereto, at the time the
       Registration Statement or such amendments became effective, contained an
       untrue statement of a material fact or omitted to state a material fact
       required to be stated therein or necessary to make the statements therein
       not misleading or that the Prospectus (including the information
       incorporated therein by reference), as of its date or at the First
       Closing Date or the Second Closing Date, as the case may be, contained an
       untrue statement of a material fact or omitted to state a material fact
       necessary in order to make the statements therein, in the light of the
       circumstances under which they were made, not misleading (it being
       understood that such counsel need express no belief as to the financial
       statements or schedules or other financial or statistical data derived
       therefrom, included or incorporated by reference in the Registration
       Statement or the Prospectus or any amendments or supplements thereto).

               In rendering such opinion, such counsel may rely as to matters of
fact, to the extent they deem proper, on certificates of responsible officers of
the Company and public officials.

                                      A-4
<PAGE>   29

                                    EXHIBIT B

                     MATTERS TO BE COVERED IN THE OPINION OF
                  INTELLECTUAL PROPERTY COUNSEL FOR THE COMPANY


               Such counsel shall state that they are familiar with the
technology used by the Company in its business and the manner of its use thereof
and have read the Registration Statement and the Prospectus, including
particularly the portions of the Registration Statement and the Prospectus
referring to patents, trade secrets, trademarks, service marks or other
proprietary information or materials and:

               (i) As to the statements (a) in the Prospectus under the captions
        "Risk Factors--Because our intellectual property is critical to the
        success of our business, our operating results would suffer if we are
        unable to adequately protect our intellectual property" and (b) in the
        Form 10-K under the caption "Item 1. Business--Patents And Proprietary
        Rights" nothing has come to the attention of such counsel which caused
        them to believe that the above-mentioned sections which are included or
        incorporated by reference in the Registration Statement and any
        amendment or supplement thereto made available and reviewed by such
        counsel, at the time the Registration Statement became effective and at
        all times subsequent thereto up to and on the Closing Date contained any
        untrue statement of a material fact or omitted to state a material fact
        required to be stated therein or necessary to make the statements
        therein, in light of the circumstances under which they were made, not
        misleading;

               (ii) Such counsel knows of no material action, suit, claim or
        proceeding relating to patents, patent rights or licenses, trademarks or
        trademark rights, copyrights, collaborative research, licenses or
        royalty arrangements or agreements or trade secrets, know-how or
        proprietary techniques, including processes and substances, owned by or
        affecting the business or operations of the Company which are pending or
        threatened against the Company or any of its officers or directors.

               (iii) The Company is listed in the records of the United States
        Patent and Trademark Office as the holder of record of the patents
        listed on a schedule to such opinion (the "Patents") and each of the
        applications listed on a schedule to such opinion (the "Applications").
        To the knowledge of such counsel, there are no claims of third parties
        to any ownership interest or lien with respect to any of the Patents or
        Applications. Such counsel is not aware of any material defect in form
        in the preparation or filing of the Applications on behalf of the
        Company. To the knowledge of such counsel, the Applications are being
        pursued by the Company. To the knowledge of such counsel, the Company
        owns as its sole property the Patents and pending Applications;

               (iv) The Company is listed in the records of the appropriate
        foreign offices as the sole holder of record of the foreign patents
        listed on a schedule to such opinion (the "Foreign Patents") and each of
        the applications listed on a schedule to such opinion (the "Foreign
        Applications"). Such counsel knows of no claims of third parties to any
        ownership interest or lien with respect to the Foreign Patents or
        Foreign Applications. Such counsel is not aware of any material defect
        of form in the preparation or filing of the Foreign Applications on
        behalf of the Company. To the knowledge of such counsel, the Foreign
        Applications are being pursued by the Company. To the knowledge of such
        counsel, the Company owns as its sole property the Foreign Patents and
        pending Foreign Applications; and

                                      B-1
<PAGE>   30


               (v) Such counsel knows of no reason why the Patents or Foreign
        Patents are not valid as issued. Such counsel has no knowledge of any
        reason why any patent to be issued as a result of any Application or
        Foreign Application would not be valid or would not afford the Company
        useful patent protection with respect thereto.


                                      B-2

<PAGE>   31

                                    EXHIBIT C

                                LOCK-UP AGREEMENT



April 19, 2000



Banc of America Securities LLC
600 Montgomery Street
San Francisco, California 94111

        RE:    Novellus Systems, Inc. (the "Company")

Ladies & Gentlemen:

The undersigned is an owner of record or beneficially of certain shares of
Common Stock of the Company ("Common Stock") or securities convertible into or
exchangeable or exercisable for Common Stock. The Company proposes to carry out
a public offering of Common Stock (the "Offering") for which you will act as the
Underwriter. The undersigned recognizes that the Offering will be of benefit to
the undersigned and will benefit the Company by, among other things, raising
additional capital for its operations. The undersigned acknowledges that you are
relying on the representations and agreements of the undersigned contained in
this letter in carrying out the Offering and in entering into underwriting
arrangements with the Company with respect to the Offering.

In consideration of the foregoing, the undersigned hereby agrees that the
undersigned will not, without you prior written consent (which consent may be
withheld in your sole discretion), directly or indirectly, sell, offer, contract
or grant any option to sell (including without limitation any short sale),
pledge, transfer, establish an open "put equivalent position" within the meaning
of Rule 16a-1(h) under the Securities Exchange Act of 1934, or otherwise dispose
of any shares of Common Stock, options or warrants to acquire shares of Common
Stock, or securities exchangeable or exercisable for or convertible into shares
of Common Stock currently or hereafter owned either of record or beneficially
(as defined in Rule 13d-3 under the Securities Exchange Act of 1934, as amended)
by the undersigned, or publicly announce the undersigned's intention to do any
of the foregoing, for a period commencing on the date hereof and continuing
through the close of trading on the date 30 days after the date of the
Prospectus. The undersigned also agrees and consents to the entry of stop
transfer instructions with the Company's transfer agent and registrar against
the transfer of shares of Common Stock or securities convertible into or
exchangeable or exercisable for Common Stock held by the undersigned except in
compliance with the foregoing restrictions.


                                      C-1
<PAGE>   32




This agreement is irrevocable and will be binding on the undersigned and the
respective successors, heirs, personal Underwriter, and assigns of the
undersigned.



                                                  ------------------------------
                                                          Printed Name of Holder

                                                  By:
                                                     ---------------------------
                                                                      Signature


                                                  ------------------------------
                                                  Printed Name of Person Signing
                                                  (and indicate capacity of
                                                   person signing if signing as
                                                   custodian, trustee, or on
                                                   behalf of an entity)

                                      C-2


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