BTU INTERNATIONAL INC
10-K405, 1998-03-31
SPECIAL INDUSTRY MACHINERY, NEC
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<PAGE>   1
                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549
                                    FORM 10-K

(MARK ONE)
[X]              ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF
                       THE SECURITIES EXCHANGE ACT OF 1934

                   FOR THE FISCAL YEAR ENDED DECEMBER 31, 1997

                                       OR

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

    FOR THE TRANSITION PERIOD FROM __________________ TO ___________________.

                         COMMISSION FILE NUMBER 0-17297

                             BTU INTERNATIONAL, INC.
             (Exact name of Registrant as specified in its charter)

                     DELAWARE                                  04-2781248
         (State or Other Jurisdiction of                    (I.R.S. Employer
          Incorporation or Organization)                  Identification Number)

23 ESQUIRE ROAD, NORTH BILLERICA, MASSACHUSETTS                01862-2596
    (Address of principal executive offices)                   (Zip Code)

       REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE: (978) 667-4111

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

           SECURITIES REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT:

                                 None Registered

           SECURITIES REGISTERED PURSUANT TO SECTION 12(g) OF THE ACT:

                               Title of Each Class
                               -------------------
                          Common Stock, $.01 Par Value

     Indicate by check mark whether the Registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
Registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days. Yes X No __

     Indicate by check mark if disclosure of delinquent filers pursuant to Item
405 of Regulation S-K is not contained herein, and will not be contained, to the
best of the Registrant's knowledge, in definitive proxy or information
statements incorporated by reference in Part III of this Form 10-K [X].

     The aggregate market value of the shares of Common Stock, $.01 par value,
of the Company held by non-affiliates of the Company was $ 23,492,057 on March
24, 1998

     Indicate number of shares outstanding of the Registrant's Common Stock, par
value $.01 per share, as of the latest practicable date: As of March 24, 1998:
7,177,662 shares.

                   DOCUMENTS INCORPORATED HEREIN BY REFERENCE

The following documents are incorporated herein by reference: Part II - Portions
of the Annual Report to Stockholders, for the year ended December 31, 1997; and
Part III - Portions of the Proxy Statement for the 1998 Annual Meeting of
Stockholders, both of which are to be filed with the Securities and Exchange
Commission.

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



<PAGE>   2


                             BTU INTERNATIONAL, INC.
                          1997 FORM 10-K ANNUAL REPORT

                                TABLE OF CONTENTS

            PART I                                                         Page
            ------                                                         ----

Item 1      Business                                                        1-4

Item 2      Properties                                                       5

Item 3      Legal Proceedings                                                5

Item 4      Submission of Matters to a Vote of Security Holders              5

Item 4A     Executive Officers of the Registrant                             5

            PART II
            -------

Item 5      Market for Registrant's Common Equity
            and Related Stockholder Matters                                  5

Item 6      Selected Financial Data                                          6

Item 7      Management's Discussion and Analysis of Financial
            Condition and Results of Operations                              6

Item 8      Financial Statements and Supplementary Data                      6

Item 9      Changes in and Disagreements With Accountants
            on Accounting and Financial Disclosure                           6

            PART III
            --------

Item 10     Directors and Executive Officers of the Registrant               6

Item 11     Executive Compensation                                           6

Item 12     Security Ownership of Certain Beneficial Owners
            and Management                                                   6

Item 13     Certain Relationships and Related Transactions                   7

            PART IV
            -------

Item 14     Exhibits, Financial Statement Schedules, and Reports
            on Form 8-K                                                    7-13


<PAGE>   3
                                     PART I

ITEM 1.  BUSINESS

General:

     The Company designs, manufactures, sells and services thermal processing
equipment and related process controls for use in the electronics, power
generation, automotive and other industries. The Company is the major supplier
of solder reflow systems used for surface mount applications in printed circuit
board assembly. The Company is a principal worldwide supplier of systems used
in: low temperature curing/encapsulation; hybrid integrated circuit
manufacturing; integrated circuit packaging and sealing; and processing
multi-chip modules. The Company is a leading supplier of systems for sintering
nuclear fuel for commercial power generation. In addition, its products are used
in other specialty applications such as brazing and the sintering of ceramics
and powdered metals, and the deposition of precise thin film coatings.

THE COMPANY HAS FOCUSED ON THREE KEY STRATEGIC AREAS:
     TECHNOLOGICAL LEADERSHIP - As process parameters change, with higher speed
     and higher density components and printed circuit boards, the Company has
     responded by developing and introducing systems which advance the state of
     the art in processing for many applications and industries.

     PRODUCT DIVERSIFICATION - The Company utilizes its core technologies to
     satisfy the customers' changing needs by offering a variety of systems
     capable of processing material from 100(Degree)C to 2000(Degree)C. These
     systems are marketed at a wide range of price levels for various
     applications which include; surface mount device solder reflow, epoxy
     curing, integrated circuit packaging and thick film, metals, ceramic and
     nuclear fuel sintering, and other applications.

     CUSTOMER SUPPORT - As thermal processing systems become more complex and
     require greater support, many customers, especially those in high-volume
     production, prefer dealing with a limited number of large capital equipment
     suppliers. The Company's reputation for system performance and
     technological innovation, together with its established worldwide service
     organization, is an important strength in selling to manufacturers for
     high-volume production applications.

PRODUCTS:
      THE THERMAL PROCESSING APPLICATIONS PERFORMED BY THE COMPANY'S PRODUCTS
       ARE USED IN THE MANUFACTURE OF:
        Surface Mount Technology (SMT) Solder Reflow
        Low Temperature Epoxy Curing/Encapsulation
        PC Board Multi Chip Modules (MCM-L)
        Conductive Polymer Thick Film Curing
        Hybrid Microelectronics
        Integrated Circuit Packaging (Ball Grid Array - BGA, Micro BGA, and Chip
         Scale Packaging - CSP)
        Ceramic Multilayer Package & Multi Chip Module Firing (MCM-C)
        Nuclear Fuel Sintering
        Diffusion and Annealing for Photovoltaic Applications
        Refractory & Powdered Metal Sintering
        Technical Ceramic Sintering
        Brazing of Electronic, Electrical, Automotive and Medical Components
        CRT Coating

      THESE PRODUCTS PERFORM THERMAL PROCESSES EITHER IN A CONTINUOUS OR IN A
       BATCH MODE: 
        Solder Reflow Systems 
        Conveyor Curing Systems 
        Continuous Belt Conveyor Processing Systems 
        High Temperature (up to 2000(Degree)C) Systems (continuous and batch) 
        Atmospheric Pressure Chemical Vapor Deposition (APCVD) Systems

     Each system has precise microprocessor controlled functions, such as
process gas measurement, temperature control and profiling, time sequencing, and
Computer Intergrated Manufacturing (CIM) - SECS/GEM Machine Interface Software.



                                       1


<PAGE>   4

     The technological change in processing is driven by the trends toward
miniaturization (hand held products), higher circuit densities, and the need for
advanced controls with cleaner process environments. The trend toward automation
to support highly reproducible processes is a requirement for most applications.
Customer needs for a high level of service and spare parts support leads to a
preference for the large capital equipment supplier with a broad technological
base and an established reputation for quality. Remote diagnosis of field
equipment from BTU's factory (via modem) increases equipment availability
(uptime).

     Solder Reflow Systems

     Convection solder reflow systems, with or without controlled atmosphere,
have become the preferred method of attaching surface mount devices to high
density printed circuit boards. Solder, in the form of a paste, is applied to
the printed circuit board and surface mount devices are placed on the solder
paste. The assembly is then heated in a continuous multi-zoned recirculated
convection process to above the melting temperature of the solder, after which
the product is rapidly cooled by convection to solidify the solder. Uniform
heating and cooling of the product is required to prevent stresses and component
overheating.

     Surface mount technology is contributing to the miniaturization of
high-density printed circuit boards and allows board designs with components on
both top and bottom. Surface mount technology is now the standard for high
density printed circuit board assembly. Prices for the Company's solder reflow
systems range from $35,000 to $200,000.

     Conveyor Epoxy/Polymer Thick Film (PTF) Curing Systems

     BTU's conveyor curing systems have process applications in several stages
of Printed Circuit Board (PCB) manufacturing to cure/encapsulate conductive or
dielectric epoxy at temperatures up to 225(Degree)C. The system allows fast,
stable curing/encapsulation at a controlled temperature. Epoxy material
developments have dramatically reduced cure times, which the Company believes
should expand the market for these curing systems for PC board and electronic
packaging. Prices for the Company's curing/encapsulation systems range from
$25,000 to $150,000.

     Continuous Belt Processing Systems

     BTU's continuous belt processing systems are used in a variety of
applications (such as integrated circuit packaging, hybrid circuit
manufacturing, brazing of automotive components, etc.). These systems operate
between 300(Degree)C and 1200(Degree)C and may measure up to 60 feet long. They
can be equipped with one or more gas barriers and atmospheric zones and may vary
in length of heating zones from four to forty-eight feet. Depending upon load
capacity requirements, conveyor belt widths vary from four to forty-eight
inches. Prices for these systems range from $30,000 to $800,000.

     High Temperature Systems

     BTU offers walking beam, special batch systems and pusher systems for high
temperature processing with heavy loads. The Company's walking beam system
employs a proprietary conveyance mechanism that can process loads of up to 800
pounds per square foot at temperatures up to 2000(Degree)C.

     A major application for this high-temperature product is sintering
multilayer integrated circuit packages. In addition, these systems are used in
sintering technical ceramics, nuclear fuels and refractory and powdered metals.
These systems are usually customized and vary in price from $250,000 to
$2,500,000.

     Atmospheric Pressure Chemical Vapor Deposition Systems

     Atmospheric pressure chemical vapor deposition ("APCVD") is a thin film
deposition process in which the vapors of two or more chemicals are mixed in a
controlled environment at elevated temperatures at atmospheric pressure. A
chemical reaction occurs at these elevated temperatures causing a thin film to
be deposited on the desired substrate. The process is typically carried out in a
continuous belt processing system at throughput rates of one to four square feet
per minute.

     The Company's APCVD systems, which sell for between $250,000 and
$1,000,000, are used in the manufacture of silicon devices, photovoltaics and
optoelectronic devices.


                                       2



<PAGE>   5
Marketing, Sales and Customers:

     The Company's worldwide customer base consists primarily of independent
manufacturers of electronic devices, computers, telecommunications, printed
circuit board assembly houses, and other companies in the electronics industry.
Other customers include nuclear fuel manufacturers and technical ceramics
manufacturers and producers using specialty brazing applications. Repeat sales
to existing customers represent a significant portion of the Company's revenue.

     The Company markets its products through the combined efforts of a direct
sales force and independent sales/service representatives. Direct sales/service
offices are maintained in the United States, England, Scotland, Germany,
Singapore, Malaysia and China. Independent sales/service representatives are
located in all major industrialized countries worldwide.

     The Company operates on a worldwide basis in support of its multinational
customer base. The following table shows the percentages of the Company's
revenues in the United States, Europe and the Far East, for the last three
years:

                                 1997              1996              1995
                                 ----              ----              ----
         United States            50%               47%               52%
         Europe                   23                25                19
         Far East                 24                23                24
         Other                     3                 5                 5

     For further information on export sales and foreign operations, see Note 4
of the Company's Consolidated Financial Statements.

     Reliability, performance, uptime and meantime-to-repair (MTR) and cost of
ownership, together with technological leadership, are important factors by
which customers evaluate potential suppliers of sophisticated processing
systems. The Company supports its customers with field service, training
programs, parts sales and operating manuals. Technical support is also available
through either direct telephone links or on-site Company personnel to provide
assistance in process support and the service and maintenance of equipment.

     Worldwide sales to Solectron represented approximately 14% of revenue in
1997. No individual customer accounted for greater than 10% of revenues in 1996
or 1995.

     The Company does not consider its business to be seasonal in nature, but it
is cyclical insofar as it is dependent on the capital equipment procurement
patterns of its customers.

Backlog:

     Backlog was $ 10.2 million at December 31, 1997 versus $8.1 million at
December 31, 1996. The primary reason is a strong increase in surface mount
technology product demand during 1997. Most of the Company's backlog is expected
to be shipped within 3 to 6 months. The Company includes in backlog only those
orders for which a purchase order has been assigned by the customer and a
delivery schedule has been specified. Because of possible changes in delivery
schedules and order cancellations, the Company's backlog at any particular date
is not necessarily representative of sales for any succeeding period.

Manufacturing and Raw Materials:

     The Company manufactures a portion of its equipment to custom
specifications. On the custom equipment orders raw material inventory is
typically purchased only after an order is received. In the case of standard
equipment, certain raw materials may be purchased based upon forecast.
Manufacturing costs are financed in part through progress payments, especially
in the case of deliveries with long lead times.

     The Company has an integrated manufacturing operation in the United States,
and purchases certain standard components and designs and manufactures others.
Although the Company relies upon single sources for certain parts, it believes
that alternative sources of supply are available in each case. The Company has
not experienced any disruption in its business due to an inadequate supply of
materials.


                                       3



<PAGE>   6

Research, Development and Engineering:

     The Company's research, development and engineering programs are devoted to
the enhancement of existing systems and the development of new systems for new
applications. As the complexity of producing miniaturized circuitry increases,
the electronics and other industries are working more closely with larger,
capital equipment suppliers to determine and develop future product and process
needs. The Company's current internally financed efforts include development of
enhanced convection heat transfer systems for solder reflow, new deposition
processes in APCVD, advanced controls and related software systems.

Competition:

     There are numerous suppliers of thermal processing systems for the
electronic and other industrial thermal processing applications. Although buying
decisions have traditionally focused on price, the Company believes that
technological leadership, process capability, throughput, environmental
safeguards, uptime, meantime-to-repair, cost of ownership, and after sale
support have become increasingly important factors. It is on the basis of these
criteria, rather than primarily on price, that the Company competes in its
markets.

     The Company's principal competitors for integrated circuit packaging and
hybrid circuit manufacturing systems vary by product application. In conveyor
belt systems, Lindberg (a division of General Signal) and SierraTherm are the
Company's principal competitors. In high temperature systems, the principal
competitors are Lindberg, Cremar and De Gussa. In solder reflow systems, the
principal competitors are Heller, Electrovert Speedline (a division of Cookson
Group PLC) and Dover Soltec (a division of Dover Corporation).

     The electronics industry is characterized by rapid technological change.
The Company must continue its development efforts to compete effectively.
Introduction of improved systems or techniques by others without a similar
advance by the Company could adversely affect the Company's prospects.

Patents and Trademarks:

     The Company holds many US and foreign patents, and it will continue to seek
patents on inventions that result from its research and development activities.
Although it believes its patents are of value, the Company depends primarily on
its technological creativity and know-how, rather than on its patents, to
maintain its competitive position. The Company also owns certain trademarks and
proprietary information that it considers important to its business and that it
seeks to protect through appropriate means.

Environmental:

     Compliance with laws and regulations regarding the discharge of materials
into the environment, or otherwise relating to the protection of the
environment, has not had any material effects on the capital expenditures,
earnings or competitive position of the Company. The Company does not anticipate
any material capital expenditures for environmental control facilities in 1998.

Employees:

     As of December 31, 1997, the Company had a total of 306 employees of which
279 were domestic and 27 were foreign based. None of the Company's employees are
represented by a union or other collective bargaining agent, and the Company
considers its relations with its employees to be good.




                                       4



<PAGE>   7

ITEM 2.  PROPERTIES

     The Company maintains its headquarters in North Billerica, Massachusetts,
where it owns a 150,000 square foot manufacturing facility and leases an
additional 17,000 square feet of manufacturing space. The Company operates its
manufacturing facility on a full first shift and partial second shift basis. In
England, for its European sales and service operations, the Company operates out
of a leased facility which lease expires in 2010. In the Far East the Company
has sales and service offices in Beijing China, Singapore, and Penang Malaysia
all of which are leased. The Company believes that its plants and capital
equipment operated at approximately 70 % of productive capacity during the
fourth quarter of 1997 and that such plants and capital equipment provide
sufficient manufacturing capacity through 1998.

ITEM 3.  LEGAL PROCEEDINGS

     There were no material legal proceedings pending as of the time of this
filing.

ITEM 4.  SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

     There were no matters submitted to a vote of the Company's security holders
during the fourth quarter of 1997.

ITEM 4A. EXECUTIVE OFFICERS OF THE REGISTRANT

         NAME               AGE          POSITIONS
         ----               ---          ---------

Paul J. van der Wansem       58     Chairman of the Board of Directors,
                                    President and Chief Executive Officer

Thomas P. Kealy              55     Vice President, Corporate Controller
                                    and Chief Accounting Officer

Santo J. DiNaro              52     Vice President of Operations and Engineering

     Paul J. van der Wansem has been President, Chief Executive Officer and a
Director of the Company since 1979. From December 1977 to 1981, he served as
Vice President of Holec, N.V., a Dutch electronics company, and from 1978
through 1981 was President of Holec (USA), Inc. From 1970 through 1973, Mr. van
der Wansem worked as an adjunct director of First National City Bank in
Amsterdam and from 1973 to 1977 as a management consultant for the Boston
Consulting Group, Inc.

     Thomas P. Kealy has been Vice President, Corporate Controller and Chief
Accounting Officer of the Company since February 1991. He has been the Corporate
Controller since joining the company in July 1985. Prior to that, Mr. Kealy
served for 14 years in various financial management positions, including
Division Controller, for Polaroid Corporation. Earlier he was the Corporate
Controller for Coro, Inc. and Lebanon, Inc.

     Santo J. DiNaro has been Vice President of Operations and Engineering since
December 1997. Prior to joining BTU International, Mr. DiNaro served as head of
Engineering at Varian's Ion Implant Division and previously was the Operations
Manager. Mr. DiNaro was with Varian for 17 years.

                                     PART II

ITEM 5. MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDERS MATTERS.

     The following in the BTU International, Inc. 1997 Annual Report is
incorporated herein by reference:

     "Common stock and market prices" set forth on page 24.

     The Company's common stock is traded in the Nasdaq National Market System
under the symbol BTUI. As of March 24, 1998 there were approximately 490
stockholders of record.


                                       5



<PAGE>   8

     To date, the Company has paid no cash dividends to its common shareholders.
The Company has no plans to pay cash dividends in the near future on its common
stock.

ITEM 6. SELECTED FINANCIAL DATA

     "Selected consolidated financial data" on page 4 of the BTU International,
Inc. 1997 Annual Report is incorporated herein by reference.

ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
        OF OPERATIONS

     "Management's discussion and analysis of financial condition and results of
operations" on pages 5-7 of the BTU International, Inc. 1997 Annual Report is
incorporated herein by reference.

ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

     The consolidated financial statements, and the notes relating thereto,
together with the report thereon of Arthur Andersen LLP, independent public
accountants, dated February 13, 1998, appearing on pages 8-22 of the BTU
International, Inc. 1997 Annual Report are incorporated herein by reference. In
addition the financial information by quarter appearing on pages 23-24 of the
BTU International, Inc. 1997 Annual Report is incorporated herein by reference.
With the exception of the aforementioned information and the information
incorporated by reference in items 5, 6 and 7, the 1997 Annual Report, is not
deemed to be filed as part of this report.

ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND 
        FINANCIAL DISCLOSURE.

     None.

                                    PART III

ITEM 10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

     Information relating to the executive officers of the Company is included
in Item 4A of Part I.

     Information relating to the directors of the Company is included under the
caption "Election of Directors" in the 1997 Proxy Statement for BTU
International, Inc. and is incorporated herein by reference.

     Information related to compliance with Section 16(a) of the Exchange Act is
included under the caption "Compliance Under Section 16(a) of the Securities
Exchange Act of 1934" in the 1997 Proxy Statement for BTU International, Inc.
and is incorporated here by reference.

ITEM 11. EXECUTIVE COMPENSATION

     Information relating to executive compensation is included under the
caption "Executive Compensation" in the 1997 Proxy Statement for BTU
International, Inc. and is incorporated herein by reference.

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

     Information relating to the security ownership of certain beneficial owners
and management is included under the caption "Beneficial Ownership of Shares" in
the 1997 Proxy Statement for BTU International, Inc. and is incorporated herein
by reference.



                                       6



<PAGE>   9

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

     None.

                                     PART IV

ITEM 14. EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K

     The following documents are filed as part of this report:

     Financial Statements (see Item 8)

         Consolidated Balance Sheets as of December 31, 1997 and 1996

         Consolidated Statements of Operations for the years ended December 31,
         1997, 1996 and 1995

         Consolidated Statements of Stockholders' Investment for the years ended
         December 31, 1997, 1996 and 1995

         Consolidated Statements of Cash Flows for the years ended December 31,
         1997, 1996 and 1995

         Notes to Consolidated Financial Statements

         Report of Independent Public Accountants

     Financial Statement Schedules

         Report of Independent Public Accountants

         Schedule II  -  Valuation and Qualifying Accounts, for the years ended 
         December 31, 1997, 1996 and 1995

         All other schedules are omitted as the required information is not
         applicable or is included in the financial statements or related notes.

     Exhibits

         The exhibits which are filed with this Form 10-K or which are
         incorporated herein by reference are set forth in the Exhibit Index
         which appears in Part IV of this report beginning at page 11.

     Reports on Form 8-K

         No reports on Form 8-K were filed in the fourth quarter of 1997.



                                       7
<PAGE>   10





                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS

To BTU International, Inc.:

     We have audited in accordance with generally accepted auditing standards,
the consolidated financial statements included in BTU International, Inc.'s
annual report to stockholders incorporated by reference in this Form 10-K, and
have issued our report thereon dated February 13, 1998. Our audit was made for
the purpose of forming an opinion on those consolidated statements taken as a
whole. The schedule listed in the preceding index is the responsibility of the
Company's management and is presented for purposes of complying with the
Securities and Exchange Commission's rules and are not part of the basic
financial statements. This schedule has been subjected to the auditing
procedures applied in the audit of the basic financial statements and, in our
opinion based on our audit and the report of other auditors, fairly states in
all material respects the financial data required to be set forth therein in
relation to the basic financial statements taken as a whole.



                                                    Arthur Andersen LLP



Boston, Massachusetts,
February 13, 1998




                                       8
<PAGE>   11


                                   SIGNATURES

     Pursuant to the requirements of Section 13 or 15(d) of the Securities
Exchange Act of 1934, the Registrant has duly caused this report to be signed on
its behalf by the undersigned, thereunto duly authorized.

                                              BTU INTERNATIONAL, INC.

Date:  March 27, 1998                         By: PAUL J. VAN DER WANSEM
                                              Paul J. van der Wansem
                                              President, Chief Executive
                                              Officer (principal executive
                                              officer) and Director

Date:  March 27, 1998                         By: THOMAS P. KEALY
                                              Thomas P. Kealy
                                              Vice President Corporate
                                              Controller and Chief
                                              Accounting Officer (principal
                                              financial and accounting officer)

Date:  March 27, 1998                         By: DR. JEFFREY CHUAN CHU
                                              Dr. Jeffrey Chuan Chu
                                              Director

Date:  March 27, 1998                         By: DAVID A.B. BROWN
                                              David A.B. Brown
                                              Director

Date   March 27, 1998                         By: ALEXANDER V. d'ARBELOFF
                                              Alexander V. d'Arbeloff
                                              Director




                                       9
<PAGE>   12

                                  EXHIBIT INDEX

     The following designated exhibits are, as indicated below, either filed
herewith or have heretofore been filed with the Securities and Exchange
Commission under the Securities Act of 1933 and the Securities Exchange Act of
1934 and are referred to and incorporated herein by reference to the BTU
International, Inc. Registration Statement Filing on Form S-1 ("33-24882"), the
annual report as reported on the 1989 Form 10-K ("1989 10-K"), the annual report
as reported on the 1991 Form 10-K ("1991 10-K"), the annual report as reported
on the 1992 Form 10-K ("1992 10-K"), the annual report as reported on the 1993
Form 10K ("1993 10-K"), the annual report as reported on the 1994 Form 10K
("1994 10-K"), or the annual report as reported on the 1995 Form 10K ("1995
10-K"), Or the quarterly report as reported on 9-28-97 Form 10Q(9-28-97 10-Q).

<TABLE>
<CAPTION>
                                                                                                                  SEC
                                                                                           Exhibit              Docket
                                                                                           -------              ------
<S>        <C>                                                                               <C>              <C>
EXHIBIT 3.        ARTICLES OF INCORPORATION AND BY-LAWS

  Incorporated herein by reference:

             3.1  Certificate of Incorporation, as amended.                                  3.1              33-24882

             3.2  By-Laws.                                                                   3.2              33-24882


EXHIBIT 4.        INSTRUMENTS DEFINING THE RIGHTS OF SECURITY HOLDERS,
                  INCLUDING DEBENTURES

  Incorporated herein by reference:

             4.0  Specimen Common Stock Certificate.                                         4.0              33-24882

EXHIBIT 10.       MATERIAL CONTRACTS

  Incorporated herein by reference:

            10.5  Agreement to Purchase Preferred Stock dated December 18,                   10.5             33-24882
                  1984 among the Registrant and certain stockholders.

            10.6  Agreement in Connection with Purchase of Class AA Preferred                10.6             33-24882
                  Stock of B&B International Holdings, Inc. dated August 5, 1988
                  among the Registrant and certain stockholders.

           10.13  1988 Employee Stock Purchase Plan. *                                       10.13            33-24882

           10.14  1982 Key Employees Stock Option Plan. *                                    10.14            33-24882

           10.15  1989 Stock Option Plan for Directors. *                                    10.15            1989 10-K

           10.22  Assets Purchase Agreement, dated as of March 4, 1992, between              10.22            1991 10-K
                  Bruce Technologies International, Inc. and BTU International, Inc.

           10.23  Joint Venture Agreement, dated as of March 4, 1992, among                  10.23            1991 10-K
                  Kokusai Electric Co., Ltd., BTU International, Inc. and Bruce
                  Technologies International, Inc.

           10.33  Promissory Note, dated March 3, 1992, between BTU                          10.33            1991 10-K
                  Engineering Corporation and John Hancock Mutual Life
                  Insurance Company.
</TABLE>


                                       10



<PAGE>   13

<TABLE>
<S>        <C>                                                                               <C>              <C>
           10.34  Amendment to Mortgage Deed, dated March 3, 1992, between                   10.34            1991 10-K
                  BTU Engineering Corporation and John Hancock Mutual Life
                  Insurance Company.

           10.37  BTU International, Inc. 1993 Equity Incentive Plan *                       10.37            1992 10-K

           10.38  Credit agreement between BTU International, Inc. and Shawmut               10.38            1994 10-K
                  Bank, N.A., dated November 16, 1994.

           10.39  BTU(UK) Limited and RD International (UK) Limited underlease,              10.39            1994 10-K
                  relating to Unit B15 Southwood Summit Centre

           10.40  First Modification to Credit Agreement between International, Inc.         10.40            1995 10-K
                  and Shawmut Bank, N.A., dated October 20, 1995.

           10.41  Second Modification to Credit Agreement between International, Inc.        10.41            1995 10-K
                  and Shawmut Bank, N.A., dated November 27, 1995.

           10.42  Mortgage note between BTU International, Inc. and John Hancock
                  Mutual Life Insurance Company, dated June 30, 1997                         10.42            9-28-97 10-Q

           10.43  Credit Agreement between BTU International, Inc. and US Trust,
                  dated September 5, 1997                                                    10.43            9-28-97 10-Q


EXHIBIT 11.       STATEMENT RE: COMPUTATION OF PER SHARE EARNINGS

  Filed herewith:

            11.0  Calculation of net income per common share

EXHIBIT 13.       ANNUAL REPORT TO STOCKHOLDERS

  Filed herewith:

            13.0  BTU International, Inc. 1997 Annual Report, except for the
                  specific portions incorporated by reference herein, the Annual
                  Report is being furnished for information purposes only and is
                  not deemed to be filed.

EXHIBIT 21.       SUBSIDIARIES OF THE REGISTRANT

  Filed herewith:

            21.0  Subsidiaries of the Registrant.

EXHIBIT 23.       CONSENTS OF EXPERTS AND COUNSEL

  Filed herewith:

            23.1  Consent of Arthur Andersen LLP

EXHIBIT 27.       FINANCIAL DATA SCHEDULE

  Filed herewith:

            27.0  Financial Data Schedule


</TABLE>

* - Indicates management contract or compensatory plan or arrangement.




                                       11
<PAGE>   14



                                                                     Schedule II

                             BTU INTERNATIONAL, INC.
                        VALUATION AND QUALIFYING ACCOUNTS
                             (Dollars in Thousands)



<TABLE>
<CAPTION>
                      For the Year Ended December 31, 1997
                      ------------------------------------

                                        Additions
                                   -------------------
                        Balance     Charged
                          at       to costs    Charged                  Balance
                       beginning      and     to other   Deductions-    at end
Description            of period   expenses   accounts       (A)       of period
- -----------            ---------   --------   --------   -----------   ---------
<S>                    <C>         <C>        <C>        <C>           <C> 
Allowance for 
doubtful accounts        $160         $-         $-          $-           $160




<CAPTION>
                      For the Year Ended December 31, 1996
                      ------------------------------------

                                        Additions
                                   -------------------
                        Balance     Charged
                          at       to costs    Charged                  Balance
                       beginning      and     to other   Deductions-    at end
Description            of period   expenses   accounts       (A)       of period
- -----------            ---------   --------   --------   -----------   ---------
<S>                    <C>         <C>        <C>        <C>           <C> 
Allowance for 
doubtful accounts        $191         $-         $-          $31          $160




<CAPTION>
                      For the Year Ended December 31, 1995
                      ------------------------------------

                                        Additions
                                   -------------------
                        Balance     Charged
                          at       to costs    Charged                  Balance
                       beginning      and     to other   Deductions-    at end
Description            of period   expenses   accounts       (A)       of period
- -----------            ---------   --------   --------   -----------   ---------
<S>                    <C>         <C>        <C>        <C>           <C> 
Allowance for 
doubtful accounts       $114         $77        $-          $-           $191
</TABLE>




     (A) Amounts indicated as deductions are for amounts charged against these
         reserves in the ordinary course of business.




                                       12

<PAGE>   1
                                                                      Exhibit 11

                             BTU INTERNATIONAL, INC.
                   CALCULATION OF NET INCOME PER COMMON SHARE
                  (Dollars in Thousands, except per share data)



<TABLE>
<CAPTION>
                                                                  For the Year Ended December 31,
                                                                  -------------------------------
                                                                1997           1996           1995
                                                                ----           ----           ----
<S>                                                          <C>            <C>            <C>       
Net income                                                   $    1,250     $    3,560     $    5,073

Dividends accrued - Class A and Class AA redeemable
  preferred stock                                                     -              -            (93)
                                                             ----------     ----------     ----------

Net income applicable to
  common stockholders                                        $    1,250     $    3,560     $    4,980
                                                             ==========     ==========     ==========

Weighted average number of shares outstanding
   Basic Shares                                               7,290,548      7,303,936      7,230,346

   Effect of Dilutive Options                                    45,154         33,773         89,771
                                                             ----------     ----------     ----------

   Diluted Shares                                             7,335,702      7,337,709      7,320,117
                                                             ==========     ==========     ==========

Earnings Per Share

   Basic                                                     $     0.17     $     0.49     $     0.69
                                                             ----------     ----------     ----------

   Diluted                                                   $     0.17     $     0.49     $     0.68
                                                             ----------     ----------     ----------
</TABLE>





                                       13


<PAGE>   1

                                FINANCIAL REVIEW

<TABLE>
<CAPTION>
SELECTED CONSOLIDATED FINANCIAL DATA:
(Thousands, except per share amounts)
FOR THE YEARS ENDED DECEMBER 31,                        1997            1996           1995          1994          1993

STATEMENT OF OPERATIONS DATA:
<S>                                                  <C>             <C>            <C>            <C>          <C>      
    Net sales                                        $  52,118       $ 45,811       $  58,274      $43,342      $  36,980
    Cost of goods sold                                  30,431         26,768          32,022       23,297         21,759
- -------------------------------------------------------------------------------------------------------------------------
    Gross profit                                        21,687         19,043          26,252       20,045         15,221
    Selling, general and administrative                 15,349         14,123          15,583       12,697         10,948
    Research, development and engineering                3,808          3,850           4,266        3,634          2,612
    Restructuring charge                                   530              -               -            -              -
- -------------------------------------------------------------------------------------------------------------------------
    Operating income                                     2,000          1,070           6,403        3,714          1,661
    Interest income                                        478            344             273          188            100
    Interest expense                                      (488)          (599)           (563)        (609)          (611)
    Gain on sale of investment                               -          3,400               -            -              -
    Other income (expense), net                           (341)            82              90           49            (33)
- --------------------------------------------------------------------------------------------------------------------------
    Income before Provision for income taxes             1,649          4,297           6,203        3,342          1,117
    Provision for income taxes                             399            737           1,130          662            107
- -------------------------------------------------------------------------------------------------------------------------
    Net income                                           1,250          3,560           5,073        2,680          1,010
    Dividends - preferred stock                              -              -             (93)        (160)          (181)
- -------------------------------------------------------------------------------------------------------------------------
    Net income applicable to common
       stockholders                                  $   1,250       $  3,560       $   4,980      $ 2,520      $     829
=========================================================================================================================
    Earnings per share:
       Basic                                         $    0.17       $   0.49       $    0.69    $    0.36      $    0.12
       Diluted                                       $    0.17       $   0.49       $    0.68    $    0.35      $    0.12
- --------------------------------------------------------------------------------------------------------------------------
    Weighted average number of shares outstanding
        Basic Shares                                     7,291          7,304           7,230        7,097          7,059
        Diluted Shares                                   7,336          7,338           7,320        7,195          7,143
=========================================================================================================================


AS OF DECEMBER 31,                                      1997            1996           1995          1994          1993

BALANCE SHEET AND OTHER DATA:
    Cash and cash equivalents                        $  11,873       $ 10,218       $   6,145      $ 6,896      $   4,754
    Working capital                                     26,098         25,268          18,005       13,433         10,923
    Total assets                                        40,379         36,763          35,834       30,965         25,845
    Long-term debt                                       5,313          5,352           5,715        6,050          6,315
    Redeemable preferred stock                               -              -               -        1,200          1,767
    Stockholders' investment                            23,558         22,207          18,696       11,950          9,331
    Book value per share                                  3.22          3.05             2.56         1.73           1.36
    Total employees                                        306           323              406          322            316
                                                     ====================================================================
</TABLE>

                                       4
<PAGE>   2

MANAGEMENT'S DISCUSSION AND ANALYSIS OF
FINANCIAL CONDITION AND RESULTS OF OPERATIONS
- --------------------------------------------------------------------------------



RESULTS OF OPERATIONS

The following table shows the percentage of net sales that certain elements of
the Consolidated Statements of Operations represent:

YEARS ENDED DECEMBER 31,                    1997        1996        1995

Net sales                                  100.0%      100.0%      100.0%

Cost of goods sold                          58.4%       58.4%       55.0%
                                          -------------------------------

Gross profit                                41.6%       41.6%       45.0%

Operating expenses:

  Selling, general and administrative       29.5%       30.8%       26.7%

  Research, development and engineering      7.3%        8.4%        7.3%

  Restructuring Charges                      1.0%        0.0%        0.0%
                                          -------------------------------

Operating income                             3.8%        2.4%       11.0%

Interest income                              0.9%        0.7%        0.4%

Interest expense                            (0.9%)      (1.3%)      (1.0%)

Gain on sale of investment                   0.0%        7.4%        0.0%

Other income (expense), net                 (0.6%)       0.2%        0.2%
                                          -------------------------------

Income before income taxes                   3.2%        9.4%       10.6%

Income tax provision                         0.8%        1.6%        1.9%
                                          -------------------------------

Net income                                   2.4%        7.8%        8.7%
                                          ===============================



1997 COMPARED TO 1996

During 1997 net sales increased by $ 6.3 million to $52.1 million, representing
an increase of 13.8% versus 1996. A strong increase in sales occurred for the
surface mount technology products which are primarily used by our large
multinational customers, as many of these customers increased their capital
expenditures significantly during 1997 as compared to 1996. Sales of the
Company's high temperature equipment declined in 1997, primarily due to a
decrease in demand for our walking beam and pusher furnaces used in nuclear fuel
and ceramic sintering.

There were no material variations in the geographic dispersion of net sales for
1997 as compared to 1996. The effect of price changes for specific products has
not materially impacted the change in net sales for the periods presented.

Gross profit increased by $ 2.6 million, or 13.9%, in 1997 as compared to 1996.
Gross profit as a percentage of sales remained at 41.6.% for 1997 as in 1996.
The increase in gross profit dollars for 1997 was due to the total increase in
revenues versus 1996. The increase in surface mount technology sales where
margins increased was offset by the decrease in high temperature sales which
generally generate a higher gross margin percentage, these factors combined
generated the same overall gross margin percent in both 1997 and 1996.

                                       5
<PAGE>   3

MANAGEMENT'S DISCUSSION AND ANALYSIS OF
FINANCIAL CONDITION AND RESULTS OF OPERATIONS
- --------------------------------------------------------------------------------
Selling, general and administrative expenses increased in 1997 by $1.2 million,
or 8.7%, but decreased as a percentage of net sales to 29.5% compared to 30.8%
in 1996. The higher costs in 1997 are primarily the result of: $ 0.5 million
increase in commissions related to the higher sales level; and a $0.6 million
increase in sales and service cost primarily in the Far East were the Company
established new direct sales and service offices.

Research, development and engineering expenses in 1997 decreased by $42,000 , or
1.1%, and decreased as a percentage of net sales to 7.3% compared to 8.4% in
1996. The Company is committed to continue investing in new technologies and is
pursuing new product developments in order to support growing customer
requirements.

Restructuring Charge - During the first quarter of 1997 the Company incurred a
restructuring charge of $530,000 related primarily to severance costs incurred
as a result of certain changes in the manner the Company conducts its business.
This charge represented one-time costs regarding actions taken in response to a
shift in the amount of out-sourced material and a change to a direct approach to
sales and service support in certain Far East territories.

Interest income increased by $134,000 or 39.0% in 1997 compared to 1996. This
increase in interest income is due to the higher investment balances in 1997
versus 1996.

Interest Expense decreased in 1997 by $ 111,000 or 18.5% compared to 1996. The
decrease is primarily due to the lower level of interest expense on the new
mortgage, which carries a lower interest rate, as of June 30, 1997.

Other Income and (Expense) reflects various non-operating expenses incurred
during 1997. The Company incurred a one-time charge of $ 271,000 for an adverse
jury determination regarding a California service representative during the
second quarter of 1997, this represents the majority of other expenses.

Income taxes decreased in 1997 by $338,000 when compared to 1996. This decrease
is directly related to the decrease in income before income taxes, primarily due
the gain on sale of investment in 1996 which generated $3.4 million in pre-tax
income in 1996. The Company has recorded an effective tax rate for 1997 of
24.2%, as compared to an effective tax rate of 17.2% for 1996. These compare to
the statutory USA Federal rate of 34%. The 1997 provision reflects the use of
certain NOL carryforwards available to the Company's U.K. subsidiary, which was
profitable in 1997. During 1996 the Company recorded the benefit of net
operating losses utilized, resulting in the lower effective tax rates.

1996 COMPARED TO 1995

During 1996 net sales decreased by $12.5 million to $45.8 million, representing
a decrease of 21.4% versus 1995. The major decrease in sales occurred in the
high-end surface mount technology products. These products are primarily used by
our large multinational customers. Most of these customers did significantly
decrease their capital expenditures in line with the slowdown in the electronics
industry during 1996. Sales of the company's mid-range surface mount technology
products continued to grow in part due to the increase in new customers.

There were no material variations in the geographic dispersion of net sales for
1996 as compared to 1995. The effect of price changes for specific products has
not materially impacted the change in net sales for the periods presented.

Gross profit decreased by $7.2 million, or 27.5%, in 1996 as compared to 1995.
Gross profit as a percentage of sales also decreased during 1996 to 41.6.%
versus 45.0% in 1995. The primary reason for this decrease in margin dollars for
1996 was due to the overall decrease in revenues versus 1995. The decrease in
the margin percentage was primarily due to the change in the product mix sold in
1996 versus 1995; from high-end to mid-range surface mount technology products
which carry a lower gross profit margin, as well as lower absorption of overhead
costs in 1996.

Selling, general and administrative expenses decreased in 1996 by $1.5 million,
or 9.4%, but increased as a percentage of net sales to 30.8% compared to 26.7%
in 1995 as a result of the 1996 sales decline. The lower costs in 1996 are
primarily the result of: $1.3 million in decreased commissions related to the
lower sales level; and a $0.5 million decrease in employee profit sharing costs
and executive bonuses, commensurate with the Company's lower overall profit
levels.

Research, development and engineering expenses in 1996 decreased by $0.4
million, or 9.8%, but increased as a percentage of net sales to 8.4% compared to
7.3% in 1995. The decrease in overall spending was related to the costs
associated with the timing of new product development and introduction.



                                       6
<PAGE>   4

MANAGEMENT'S DISCUSSION AND ANALYSIS OF
FINANCIAL CONDITION AND RESULTS OF OPERATIONS
- --------------------------------------------------------------------------------

Interest income increased by $71,000 in 1996 compared to 1995. This increase in
interest income is due to the investment of additional cash resulting from the
sale of the Company's minority interest in Bruce Technologies International Inc.
(BTI) in June 1996.

On June 8, 1996 the Company sold its 19.4% investment in BTI for $ 7,000,000,
resulting in a pretax gain of $ 3,400,000, net of direct costs.

Income taxes decreased in 1996 by $393,000 compared to 1995. This decrease is
directly related to the decrease in income before income taxes generated by the
lower sales level in 1996. The Company has recorded an effective tax rate during
1996 of 17.5%, as compared to an effective tax rate of 18.2% during 1995. These
compare to the statutory USA Federal rate of 34%. During 1996 and 1995, the
Company has recorded the benefit of net operating losses utilized, resulting in
the lower effective tax rates.

LIQUIDITY AND CAPITAL RESOURCES

During 1997, the Company completed two financing agreements. The Company
refinanced its mortgage note payable with the same institution. In addition, to
provide greater flexibility in working capital and potential expansion in the
future, the Company expanded its line of credit by entering into a new long term
credit agreement with a Bank.

The Company has an unsecured revolving line of credit with a bank which allows
for the aggregate of borrowings and/or letters of credit of up to $14,000,000.
Borrowings are available to the Company at either the Bank's base rate or a
Eurodollar rate, as elected by the Company. This loan agreement is available to
the Company until April 30, 2002, and is subject to certain financial covenants.

The Company has a mortgage note, which is secured by its land and building. The
Mortgage note payable had an outstanding balance at December 31, 1997 of
$5,519,000. The Company refinanced the mortgage note payable with the same
institution on June 30, 1997, extending the maturity date to July 1, 2004. The
mortgage requires monthly payments of $53,922, including interest at 8.125%. A
final balloon payment of $3,825,000 is due at maturity.

During 1997, the Company has invested approximately $ 1,300,000 in capital
improvements primarily to enhance the level of quality in the Company's products
through an improved manufacturing facility. The Company does not presently have
any outstanding commitments for capital expenditures that would have a material
impact on the Company's liquidity and future capital resources.

The Company expects that its current cash position, ability to borrow necessary
funds, as well as cash flows from operations will be sufficient to meet its
corporate, operating and capital requirements into 1999.

OTHER MATTERS

The impact of inflation and the effect of foreign exchange rate changes during
1997 has had an immaterial impact on the Company's business and financial
results.

The Company has assessed and continues to assess the impact of the Year 2000
issue on its operations from both a product and operational basis. Additionally,
the Company has begun an assessment of its supplier compliance with Year 2000
issues. Although final costs have yet to be determined, it is anticipated that
these Year 2000 costs will not materially impact the financial results of the
Company.

This annual report contains forward-looking statements within the meaning of the
Private Securities Litigation Reform Act of 1995. These statements are based on
the Company's current plans and expectations and involve risks and uncertainties
that could cause actual future activities and results of operations to be
materially different from those set forth in the forward-looking statements.
Important factors that could cause actual results to differ include, among
others, general market conditions governing supply and demand, the timely
availability and acceptance of new products, and the impact of competitive
products and pricing and other risks detailed in the Company's SEC reports.



                                       7
<PAGE>   5


<TABLE>
<CAPTION>
        CONSOLIDATED BALANCE SHEETS
        (Thousands, except share amounts)
        As of December 31,                                          1997      1996
<S>                                                               <C>       <C>
ASSETS  CURRENT ASSETS                                            
          Cash and cash equivalents (Notes 1 and 12)              $11,873   $10,218
          Trade accounts receivable, less reserves of $160        
             in 1997 and 1996,  (Note 1)                           12,334    10,630
          Inventories (Note 1)                                     10,028     9,760
          Other current assets (Note 6)                             1,124     1,661
        ---------------------------------------------------------------------------
          TOTAL CURRENT ASSETS                                     35,359    32,269
        ---------------------------------------------------------------------------
        PROPERTY, PLANT AND EQUIPMENT, AT COST (NOTES 1 AND 3)    
          Land                                                        210       210
          Buildings and improvements                                5,949     5,591
          Machinery and equipment                                   5,783     5,021
          Furniture and fixtures                                      749       731
        ---------------------------------------------------------------------------
                                                                   12,691    11,553
          Less-accumulated depreciation                             8,077     7,288
        ---------------------------------------------------------------------------
          NET PROPERTY, PLANT AND EQUIPMENT                         4,614     4,265
        Other assets, net of accumulated amortization of          
          $437 in 1997 and $421 in 1996.                              406       229
        ---------------------------------------------------------------------------
          TOTAL ASSETS                                            $40,379   $36,763
        ===========================================================================
</TABLE>
                                                                            



The accompanying notes are an integral part of these consolidated financial
statements.



                                       8
<PAGE>   6


<TABLE>
<CAPTION>
                CONSOLIDATED BALANCE SHEETS
                (Thousands, except share amounts)
                As of December 31,                                                                  1997             1996
<S>                                                                                              <C>              <C>
LIABILITIES     CURRENT LIABILITIES                                                              
AND                 Current maturities of long-term debt and capital lease obligations (Note 3)  $     224        $     363
STOCKHOLDERS'       Trade accounts payable (Note 10)                                                 6,013            4,124
INVESTMENT          Customer deposits                                                                  428              441
                    Accrued expenses (Note 2)                                                        2,596            2,073
                  ---------------------------------------------------------------------------------------------------------
                    TOTAL CURRENT LIABILITIES                                                        9,261            7,001
                  ---------------------------------------------------------------------------------------------------------
                  Long-term debt and capital lease obligations, less                             
                    current maturities (Notes 3 and 12)                                              5,313            5,352
                  Deferred income taxes (Notes 1 and 6)                                              2,247            2,203
                  ---------------------------------------------------------------------------------------------------------
                    TOTAL LIABILITIES                                                               16,821           14,556
                  ---------------------------------------------------------------------------------------------------------
                                                                                                 
                  Commitments and contingencies (Note 3)                                         
                                                                                                 
                  STOCKHOLDERS' INVESTMENT (NOTE 8)                                              
                    Series preferred stock, $1 par value-                                        
                      Authorized-5,000,000 shares; Issued and outstanding-none                           -                -
                    Common stock, $.01 par value-                                                
                      Authorized-25,000,000 shares; Issued-7,674,923 and 7,635,167 shares        
                      at December 31, 1997 and 1996, respectively                                       77               76
                    Additional paid-in capital                                                      20,250           20,115
                    Retained earnings                                                                4,061            2,811
                    Less treasury stock- 355,281 shares, at cost,                                
                      at December 31, 1997 and 1996                                                 (1,183)          (1,183)
                  ---------------------------------------------------------------------------------------------------------
                                                                                                    23,205           21,819
                    Cumulative translation adjustment (Note 1)                                         353              388
                  ---------------------------------------------------------------------------------------------------------
                    TOTAL STOCKHOLDERS' INVESTMENT                                                  23,558           22,207
                  ---------------------------------------------------------------------------------------------------------
                    TOTAL LIABILITIES AND STOCKHOLDERS' INVESTMENT                               $  40,379        $  36,763
                  =========================================================================================================
</TABLE>




The accompanying notes are an integral part of these consolidated financial
statements.



                                       9
<PAGE>   7

<TABLE>
<CAPTION>
CONSOLIDATED STATEMENTS OF OPERATIONS
(Thousands, except per share amounts)
FOR THE YEARS ENDED DECEMBER 31,                                   1997                1996                1995

<S>                                                             <C>                 <C>                 <C>      
NET SALES (NOTES 1, 4,  AND 5)                                  $  52,118           $  45,811           $  58,274

Cost of goods sold                                                 30,431              26,768              32,022
                                                                -------------------------------------------------

GROSS PROFIT                                                       21,687              19,043              26,252

Selling, general and administrative (Note 10)                      15,349              14,123              15,583

Research, development and engineering (Note 1)                      3,808               3,850               4,266

Restructuring charge                                                  530                   -                   -
                                                                -------------------------------------------------

OPERATING INCOME                                                    2,000               1,070               6,403

Interest income                                                       478                 344                 273

Interest expense (Note 3)                                            (488)               (599)               (563)

Gain on sale of investment (Note 9)                                     -               3,400                   -

Other income (expense)                                               (341)                 82                  90
                                                                -------------------------------------------------

INCOME BEFORE PROVISION FOR INCOME TAXES                            1,649               4,297               6,203

Provision for income taxes (Notes 1 and 6)                            399                 737               1,130
                                                                -------------------------------------------------

NET INCOME                                                          1,250               3,560               5,073

Dividends accrued-Class A and AA redeemable
   preferred stock                                                      -                   -                 (93)
                                                                -------------------------------------------------

NET INCOME APPLICABLE TO COMMON
   STOCKHOLDERS                                                 $   1,250           $   3,560           $   4,980
                                                                =================================================

EARNINGS PER SHARE
- ------------------

    BASIC                                                       $    0.17           $    0.49           $    0.69

    DILUTED                                                     $    0.17           $    0.49           $    0.68
                                                                =================================================

WEIGHTED AVERAGE NUMBER  OF SHARES OUTSTANDING
- ----------------------------------------------

    BASIC SHARES                                                    7,291               7,304               7,230

    EFFECT OF DILUTIVE OPTIONS                                         45                  34                  90
                                                                -------------------------------------------------

    DILUTED SHARES                                                  7,336               7,338               7,320
                                                                =================================================
</TABLE>



The accompanying notes are an integral part of these consolidated financial
statements.


                                       10
<PAGE>   8

<TABLE>
<CAPTION>
CONSOLIDATED STATEMENTS OF STOCKHOLDERS' INVESTMENT

(Thousands)
                                                     ADDITIONAL       RETAINED                    CUMULATIVE       TOTAL
                                         COMMON        PAID-IN        EARNINGS       TREASURY     TRANSLATION  STOCKHOLDERS'
                                          STOCK        CAPITAL        (DEFICIT)        STOCK      ADJUSTMENT    INVESTMENT

<S>                                     <C>          <C>             <C>            <C>          <C>            <C>      
BALANCE AT DECEMBER 31, 1994            $      72    $  18,226       $ (5,729)      $    (935)   $     316      $  11,950

    Net income                                  -            -          5,073               -            -          5,073

    Translation adjustment                      -            -              -               -           16             16

    Sales of common stock
      (Note 8)                                  2          230              -               -            -            232

    Tax benefit of stock options
      exercised                                 -          318              -               -            -            318

    Conversion of preferred
      AA shares                                 2        1,198              -               -            -          1,200

    Dividends declared
                                                -            -            (93)              -            -            (93)
                                        ---------------------------------------------------------------------------------

BALANCE AT DECEMBER 31, 1995            $      76    $  19,972       $   (749)      $    (935)   $     332      $  18,696
                                        ---------------------------------------------------------------------------------

    Net income                                  -            -          3,560               -            -          3,560

    Translation adjustment                      -            -              -               -           56             56

    Sales of common stock
      (Note 8)                                  -          119              -               -            -            119

    Tax benefit of stock options
      exercised                                 -           24              -               -            -             24

    Purchase of treasury stock                  -            -              -            (248)           -           (248)
                                        ----------------------------------------------------------------------------------

BALANCE AT DECEMBER 31, 1996            $      76    $  20,115       $  2,811       $  (1,183)   $     388      $  22,207
                                        ---------------------------------------------------------------------------------

    NET INCOME                                  -            -          1,250               -            -          1,250

    TRANSLATION ADJUSTMENT                      -            -              -               -          (35)           (35)

    SALES OF COMMON STOCK
      (NOTE 8)                                  1          108              -               -            -            109

    TAX BENEFIT OF STOCK OPTIONS
      EXERCISED                                 -           27              -               -            -             27
                                        ---------------------------------------------------------------------------------

BALANCE AT DECEMBER 31, 1997            $      77    $  20,250       $  4,061       $  (1,183)   $     353      $  23,558
                                        =================================================================================
</TABLE>




The accompanying notes are an integral part of these consolidated financial
statements.

                                       11
<PAGE>   9

<TABLE>
<CAPTION>
CONSOLIDATED STATEMENTS OF CASH FLOWS
(Thousands)
FOR THE YEARS ENDED DECEMBER 31,                                   1997                1996                1995
CASH FLOWS FROM OPERATING ACTIVITIES-

<S>                                                             <C>                 <C>                 <C>      
  Net income                                                    $   1,250           $   3,560           $   5,073

  Adjustments to reconcile net income to net
    cash provided by (used in) operating activities-

    Depreciation and amortization                                     961                 832                 740

    Deferred income taxes                                              44                 756                (267)


    Net gain on sale of investment                                      -              (3,400)                  -

     Net changes in operating assets and liabilities-

       Accounts receivable                                         (1,704)                878              (1,816)

       Inventories                                                   (268)                139              (4,381)

       Other current assets                                           537              (1,232)                949

       Accounts payable                                             1,889                (483)              1,601

       Customer deposits                                              (13)                 45              (1,411)

       Accrued expenses                                               523              (2,564)                547

       Other assets                                                  (193)                 (3)                (13)
                                                                --------------------------------------------------

NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES                 3,026              (1,472)              1,022
                                                                -------------------------------------------------

CASH FLOWS FROM INVESTING ACTIVITIES-
  Purchases of property, plant and equipment, net                  (1,294)               (946)             (1,099)

  Net proceeds from sale of investment                                  -               6,876                   -
                                                                -------------------------------------------------

NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES                (1,294)              5,930              (1,099)
                                                                --------------------------------------------------

CASH FLOWS FROM FINANCING ACTIVITIES-
  Principal payments under long-term debt and
    capital lease obligations                                        (300)               (336)               (310)

  Proceeds from mortgage refinance                                    122                   -                   -

  Issuance of common stock                                            109                 119                 232

  Tax benefit of stock options exercised                               27                  24                 318

   Purchase of treasury stock                                           -                (248)                  -

  Payments of preferred stock dividends                                 -                   -                (363)

  Redemption of Class A preferred stock                                 -                   -                (567)
                                                                -------------------------------------------------

NET CASH USED IN FINANCING ACTIVITIES                                 (42)               (441)               (690)
                                                                -------------------------------------------------

EFFECT OF EXCHANGE RATES ON CASH                                      (35)                 56                  16
                                                                -------------------------------------------------

NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS                1,655               4,073                (751)

CASH AND CASH EQUIVALENTS, AT BEGINNING OF YEAR                    10,218               6,145               6,896
                                                                -------------------------------------------------

CASH AND CASH EQUIVALENTS, AT END OF YEAR                       $  11,873           $  10,218           $   6,145
                                                                =================================================
</TABLE>


Supplemental disclosures of cash flow information are included in Note 11. The
accompanying notes are an integral part of these consolidated financial
statements.

                                       12
<PAGE>   10


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
- --------------------------------------------------------------------------------

NOTE 1:  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

  a.   Nature of Operations

       BTU International, Inc. (the Company) and its wholly owned subsidiaries
       are primarily engaged in the manufacture, sale, installation and service
       of thermal processing systems, which are used as capital equipment in
       various manufacturing processes, primarily in the electronics industry.

  b.   Principles of Consolidation and the Use of Estimates

       The accompanying consolidated financial statements include the accounts
       of the Company and its wholly owned subsidiaries. All material
       intercompany balances and transactions have been eliminated in
       consolidation. The preparation of these financial statements required the
       use of certain estimates by management in determining the entity's
       assets, liabilities, revenue and expenses. Actual results may vary from
       these estimates.

  c.   Cash and Cash Equivalents

       The Company has classified certain liquid financial instruments, with
       original maturities of less than three months, as cash equivalents.

  d.   Inventories

       Inventories consist of material, labor and overhead and are valued at the
       lower of cost or market. Cost is determined by the first-in, first-out
       (FIFO) method for all inventories.

<TABLE>
<CAPTION>
       Inventories consist of:
       (Thousands)
       DECEMBER 31,                                                 1997             1996

<S>                                                             <C>               <C>     
       Raw materials and manufactured components                $   4,883         $  5,660
       Work-in-process                                              3,723            2,527
       Finished goods                                               1,422            1,573
                                                                --------------------------
                                                                $  10,028         $  9,760
                                                                ==========================
</TABLE>

  e.   Property, Plant and Equipment

       The Company provides for depreciation using the straight-line method over
       a period sufficient to amortize the cost of the asset over its useful
       life. The estimated useful lives for depreciation purposes are as
       follows:

       Buildings and improvements            8-25    years
       Machinery and equipment               2-8     years
       Furniture and fixtures                5-8     years

       Maintenance and repairs are charged to operations as incurred. When
       equipment and improvements are sold or otherwise disposed of, the asset
       cost and accumulated depreciation are removed from the accounts, and the
       resulting gain or loss, if any, is included in the results of operations.

                                       13
<PAGE>   11

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
- --------------------------------------------------------------------------------

  f.   Income Taxes

       The Company complies with the requirements of Statement of Financial
       Accounting Standards (SFAS) No. 109, "Accounting for Income Taxes." Under
       SFAS No. 109, deferred tax assets and liabilities are recognized for the
       expected future tax consequences of events that have been included in the
       consolidated financial statements or tax returns. The amounts of deferred
       tax assets or liabilities are based on the difference between the
       financial statement and tax basis of assets and liabilities using enacted
       tax rates in effect for the year in which the differences are expected to
       reverse.

  g.   Translation of Foreign Currencies

       Foreign currencies are translated in accordance with SFAS No. 52,
       "Foreign Currency Translation." Under this standard, assets and
       liabilities of the Company's foreign operations are translated into
       United States dollars at current exchange rates. Income and expense items
       are translated at average rates of exchange prevailing during the year.
       Gains and losses arising from translation are accumulated as a separate
       component of stockholders' investment. Exchange gains and losses (if any)
       arising from transactions denominated in foreign currencies are included
       in income as incurred. No such exchange gains or losses were incurred in
       the periods presented.

  h.   Patents

       The Company has patents for certain of its products and processes. No
       value has been assigned to these patents in the accompanying consolidated
       financial statements.

  i.   Revenue Recognition

       Revenue is recognized based upon shipment of product to the customer,
       except for large contracts that are not completed within the normal
       operating cycle of the business which are accounted for on a percentage
       completion basis. Under the percentage completion method, revenues are
       recognized in proportion to costs incurred compared to total estimated
       costs, full provision is made for any anticipated loss. No percentage
       completion revenues were recorded at December 31, 1997. Amounts related
       to such contracts included in net sales were $1,361,000 and $1,102,000
       for the years ended December 31, 1996 and 1995, respectively.

  j.   Research, Development and Engineering

       Research, development and engineering costs are charged to expense as
       incurred.

  k.   Earnings Per Share Information

       Earnings per share in 1997, 1996 and 1995 have been restated to comply
       with the Statement of Financial Accounting Standards (SFAS) No. 128
       "Earning Per Share." Under SFAS No. 128, Earnings Per Share (EPS) is
       presented under two calculations, Basic and Diluted. Basic EPS is
       computed by dividing income available to common stockholders by the
       weighted-average number of common shares outstanding during the period.
       Diluted EPS is computed using the weighted average number of common and
       dilutive potential common shares outstanding during the period, using the
       treasury stock method. Options outstanding that were not included in the
       determination of diluted EPS, because they were antidilutive were 42,500,
       123,800 and 0 in 1997,1996 and 1995 respectively.

  l.   Reclassification

       Certain prior year financial statement information has been reclassified
       to conform with the current year presentation.

                                       14
<PAGE>   12

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
- --------------------------------------------------------------------------------

NOTE 2:  ACCRUED EXPENSES

<TABLE>
<CAPTION>
       Accrued expenses at December 31, 1997 and 1996 consisted of the following:

       (Thousands)
                                                                     1997             1996

<S>                                                             <C>               <C>     
       Accrued commissions                                      $   1,441         $  1,112
       Accrued warranty                                               459              414
       Accrued income taxes                                             -               41
       Accrued bonus                                                   89                -
       Other                                                          607              506
                                                                --------------------------

                                                                $   2,596         $  2,073
                                                                ==========================
</TABLE>



NOTE 3:  DEBT, CAPITAL LEASES, COMMITMENTS AND CONTINGENCIES

<TABLE>
<CAPTION>
       Debt at December 31, 1997 and 1996 consisted of the following:

       (Thousands)
                                                                     1997             1996

<S>                                                             <C>               <C>     
       Mortgage note payable                                    $   5,519         $  5,664
       Capital lease obligations, interest rates ranging
         from 6.9% to 9.6%, net of interest of $2
         and $6 in 1997 and 1996, respectively                         18               51
                                                                --------------------------
                                                                    5,537            5,715
       Less-current maturities                                        224              363
                                                                --------------------------
                                                                $   5,313         $  5,352
                                                                ==========================
</TABLE>

       The mortgage note payable is secured by the Company's land and building
       and requires monthly payments of $53,922, including interest at 8.125%.
       This mortgage note payable was refinanced with the same institution on
       June 30, 1997, extending the maturity date to July 1, 2004. The new
       agreement requires a final balloon payment of $ 3,825,000 at maturity.

       The previous mortgage required a monthly payment of $ 68,500 including
       interest at 9.0%, these terms were in affect until June 30, 1997.

                                       15
<PAGE>   13

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
- --------------------------------------------------------------------------------

       Under the terms of the debt, the minimum repayments of long-term debt and
       capital lease obligations by year are as follows:

       (Thousands)
                                      8.125%            CAPITAL
                                     MORTGAGE           LEASES           TOTAL

       1998                         $     206           $    18        $     224
       1999                               224                 -              224
       2000                               242                 -              242
       2001                               263                 -              263
       2002                               285                 -              285
       2003                               310                 -              310
       2004                             3,989                 -            3,989
                                    --------------------------------------------
                                    $   5,519           $    18        $   5,537
                                    ============================================


       At December 31, 1997, the Company has an unsecured revolving line of
       credit, with a US bank, which allows for aggregate borrowings and/or
       letters of credit of up to $14,000,000. Borrowings are available to the
       Company at either the Bank's base rate or a Eurodollar rate, as elected
       by the Company. This loan agreement is available to the Company until
       April 30, 2002, subject to the maintenance of certain financial
       covenants. At December 31, 1997, the Company was in compliance with all
       covenants of this agreement. As of December 31, 1997, no amounts were
       outstanding under this unsecured revolving line of credit. Available
       borrowings under the line were reduced by $ 71,000 which was committed
       under a stand by letter of credit.

       The Company conducts its UK operations in a facility that is under a
       long-term operating lease expiring in 2010. Rent expense under this lease
       was approximately $143,000 in 1997, $145,000 in 1996 and $205,000 in
       1995. In 1994, the Company sublet a portion of this leased space. The
       initial term of the sublease is five years. Under the terms of the
       sublease the Company will receive approximately $132,000 per year. At the
       end of the initial five year sublet period, the sublease can be extended
       at market rates for two subsequent and concurrent five year periods. As
       of December 31, 1997, assuming the sublease is not extended, the future
       minimum lease commitment for this facility is $3,130,000, payable as
       follows $145,000 for each year 1998 and 1999, $250,000 for the year 2000,
       $280,000 for each year 2001 and 2002 and $2,030,000 thereafter through
       2010.

       The Company is a party to various claims arising in the normal course of
       business. Management believes the resolution of these matters will not
       have a material impact on the Company's results of operations or
       financial condition.

NOTE 4:  FOREIGN OPERATIONS

       Export sales were $26,057,000 in 1997, $24,380,000 in 1996 and
       $27,767,000 in 1995.

       The following table shows the percentages of the Company's revenues by
       geographic region, for the last three years:

                                        1997               1996             1995

       United States                     50%                47%              52%
       Europe                            23                 25               19
       Far East                          24                 23               24
       Other                              3                  5                5

                                       16
<PAGE>   14

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
- --------------------------------------------------------------------------------

NOTE 5:  SIGNIFICANT CUSTOMERS

       One customer individually represented approximately 14% of revenues in
       1997. No individual customer accounted for greater than 10% of revenues
       in 1996 or 1995.

NOTE 6:  INCOME TAXES

       The components of income before provision for income taxes are as
       follows:

       (Thousands)
       FOR THE YEAR                    1997              1996             1995

       Domestic                     $   1,040         $   3,985        $   5,762
       Foreign                            609               312              441
                                    --------------------------------------------
       Total                        $   1,649         $   4,297        $   6,203
                                    ============================================


       For the years ended December 31, 1997, 1996 and 1995, the Company's
       provision for income taxes are as shown below:

<TABLE>
<CAPTION>
      (Thousands)
                                       FEDERAL          STATE            FOREIGN           TOTAL

<S>                                 <C>               <C>              <C>             <C>      
      DECEMBER 31, 1997
         CURRENT                    $     308         $      47        $       0       $     355
         DEFERRED                          39                 5                0              44
                                    ------------------------------------------------------------
                                    $     347         $      52        $       0       $     399
                                    ============================================================
       DECEMBER 31, 1996
         Current                    $     (50)        $      31        $       0       $     (19)
         Deferred                         578               178                0             756
                                    ------------------------------------------------------------
                                    $     528         $     209        $       0       $     737
                                    ============================================================
       DECEMBER 31, 1995
         Current                    $   1,163         $     234        $       0       $   1,397
         Deferred                        (441)              174                0            (267)
                                    ------------------------------------------------------------
                                    $     722         $     408        $       0       $   1,130
                                    ============================================================
</TABLE>


                                       17
<PAGE>   15

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
- --------------------------------------------------------------------------------

       The differences between the statutory United States federal income tax
       rate of 34% versus the Company's effective tax rate are as follows:

<TABLE>
<CAPTION>
       (Thousands)
       FOR THE YEAR                                            1997              1996             1995

<S>                                                         <C>               <C>              <C>      
       Tax provision at United States statutory rate        $     561         $   1,461        $   2,109
       State income taxes, net of federal benefit                  48               184              269
       Utilization of domestic net operating loss
       carryforwards and reduction of valuation reserves            -              (769)          (1,122)
       Utilization of foreign net operating
        loss carryforwards                                       (189)              (97)            (137)
       Non-deductible and other                                   (21)              (42)              11
                                                            --------------------------------------------
       Total provision                                      $     399         $     737        $   1,130
                                                            ============================================
</TABLE>


       Deferred income taxes and prepaid income taxes are comprised of the
       following at December 31, 1997 and 1996:

<TABLE>
<CAPTION>
       (Thousands)
                                                                     1997             1996

<S>                                                             <C>               <C>      
       Revenues recognized for books, not tax                   $  (4,767)        $ (5,720)
       Accelerated tax depreciation                                  (196)            (240)
       Other                                                         (116)            (116)
                                                                --------------------------
         Total deferred liabilities                                (5,079)          (6,076)
                                                                --------------------------
       Inventory reserves                                             233              253
       Inventory capitalization                                        78              341
       Commissions                                                      -              756
       Other                                                          453              283
       Federal tax net operating loss carryforward                    559              732
       Federal tax credit carryforwards                             1,805            1,804
                                                                --------------------------
         Total deferred assets                                      3,128            4,169
                                                                --------------------------
            Total net deferred liability                           (1,951)          (1,907)
       Valuation allowance                                           (296)            (296)
                                                                ---------------------------
       Net deferred income taxes                                $  (2,247)        $ (2,203)
                                                                ===========================
</TABLE>

       The valuation allowance relates to uncertainty surrounding the
       realization of the deferred tax assets, principally certain tax loss and
       credit carryforwards. Realization is dependent on generating sufficient
       taxable income prior to expiration of the loss carryforwards. As of
       December 31, 1997, the Company had federal tax net operating loss
       carryforwards of $1,645,000, which expire beginning in 2007. In addition,
       the Company has research and development and AMT credit carryforwards of
       $1,805,000, which expire beginning in 1999. The tax carryforwards are
       subject to review and possible adjustment by the Internal Revenue
       Service. Additionally, changes in ownership may limit the utilization of
       US net operating losses for tax purposes in any one year, deferring the
       use of these losses to future years. Included in other current assets is
       a refundable income tax receivable of $ 587,000 as of December 31, 1997
       and $1,162,000 as of December 31, 1996. In addition the Company's UK
       subsidiary utilized some of it's net operating loss carryforwards to
       reduce the current consolidated tax provision. The UK subsidiary has $
       2,265,000 of net operating loss carryforwards available at December 31,
       1997. The benefit of these losses are being recognized as utilized.

                                       18

<PAGE>   16

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
- --------------------------------------------------------------------------------

NOTE 7:  EMPLOYEE BENEFITS

       The Company has management incentive and profit sharing plans for its
       executives and all of its employees. These plans provide for bonuses upon
       the attainment of stipulated earnings per share and operating income
       targets. Under these plans, $ 89,000 was expensed in 1997, no amounts
       were expensed in 1996, while $801,000 in expense was recorded in 1995.

       The Company has a deferred 401(k) contribution plan that is available to
       cover all domestic employees of the Company who have met certain length
       of service requirements. Subject to non-discriminatory restrictions on
       highly compensated employees, participants can voluntarily contribute up
       to 17% of their compensation to the plan, and the Company, at its
       discretion, may match this contribution up to a stipulated percentage.
       The Company's expense under the plan was $ 170,000, $191,000 and $172,000
       for the years ended December 31, 1997, 1996 and 1995, respectively.

NOTE 8:  STOCK OPTION AND PURCHASE PLANS

       The Company has two stock option plans. The 1989 Stock Plan for Directors
       (1989 Plan) provides for stock options to certain directors of the
       Company. The 1993 Equity Incentive Plan (1993 Plan) provides for stock
       options for selected key employees and the Company's non-employee
       directors. Under the terms of the 1993 Plan, other stock awards can also
       be granted at the discretion of the Company's Board of Directors.

       Under each plan, the exercise price of the options is not less than fair
       market value at the date of the grants. The 1989 Plan options expire over
       seven years and the 1993 Plan options expire over periods not to exceed
       10 years. Shares available for future stock option grants, pursuant to
       these plans, are 127,763 at December 31, 1997, 330,763 at December 31,
       1996, and 449,323 at December 31, 1995.

       A summary of all stock option activity for the years ended December 31,
       1997, 1996 and 1995 is as follows:

<TABLE>
<CAPTION>
                                                 1997                        1996                       1995

                                                      WEIGHTED                    Weighted                   Weighted
                                         NUMBER        AVERAGE       Number        Average       Number       Average
                                           OF           PRICE          of           Price          of          Price
                                         SHARES       PER SHARE      Shares       Per Share      Shares      Per Share
<S>                                      <C>           <C>           <C>           <C>           <C>          <C>    
       Outstanding at
           beginning of year             189,095       $  3.64       120,045       $  1.98       257,612      $  1.71
       Granted                           234,500          3.98       130,100          4.49         2,000         4.25
       Exercised                         (24,405)         2.50       (49,510)         1.69      (136,027)        1.50
       Forfeited                         (31,500)         3.90       (11,540)         4.32        (3,540)        2.00
                                      -------------------------------------------------------------------------------
       Outstanding at                                                                                      
           end of year                   367,690       $  3.91       189,095       $  3.64       120,045      $  1.98
                                      ===============================================================================
       Options exercisable                                                                                 
           at end of year                 66,790       $  2.92        36,517       $  2.05        52,782      $  1.87
                                      ===============================================================================
</TABLE>

       At December 31, 1997 the outstanding options have exercise prices ranging
       from $ 1.38 to $ 6.19 and a weighted average remaining contractual life
       of 5.6 years.

       The Company has an Employee Stock Purchase Plan. Under the terms of the
       plan, employees are entitled to purchase shares of common stock at the
       lower of 85% of fair market value at the beginning or the end of each
       six-month option period. A total of 300,000 shares has been reserved for
       issuance under this plan, of which 59,228 remain available at December
       31, 1997. During 1997, a total of 15,351 shares were purchased at prices
       ranging from $2.55 to $3.83 per share.


                                       19
<PAGE>   17

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
- --------------------------------------------------------------------------------

       The Company applies Accounting Principles Board Opinion No. 25 and
       related Interpretations in accounting for its stock option and purchase
       plans. Accordingly, no compensation cost has been recognized related to
       the plans. Had compensation cost for the plans been determined based on
       the fair value at the grant dates for the awards under these plans
       consistent with SFAS No. 123, "Accounting for Stock-Based Compensation",
       the Company's net income and net income per share would have been reduced
       to the pro forma amounts indicated below:

<TABLE>
<CAPTION>
       (Thousands except per share amounts)
       FOR THE YEAR                                       1997           1996           1995

<S>                                                    <C>            <C>            <C>     
       Net income                 As reported          $  1,250       $  3,560       $  5,073
                                  Pro forma               1,140          3,516          5,063

       Income per diluted share   As reported          $   0.17       $   0.49       $   0.68
                                  Pro forma                0.16           0.48           0.68
</TABLE>

       Pro forma compensation costs were estimated using the Black-Scholes
       option pricing model using the following weighted average assumptions for
       grants in 1997, 1996 and 1995, respectively: a dividend yield rate of 0
       for each year; expected lives of 5.0, 4.5 and 1.2 years; expected
       volatility of 68.2%, 55.3% and 66.9%; and risk free interest rates of
       6.4%, 6.2% and 6.3%. The weighted average fair value of options granted
       during 1997, 1996 and 1995 was $2.48, $2.29 and $1.99, respectively.

       As the SFAS No. 123 presentation has not been applied to options granted
       prior to January 1, 1995, the resulting pro forma reduction in net
       earnings and earnings per share may not be representative of what could
       be expected in future years.


NOTE 9:  SALE OF INVESTMENT.

       In 1996, the Company sold its 19.4% minority interest in Bruce
       Technologies International, Inc. (BTI) for $7,000,000. As a result the
       Company recognized a pretax gain on this investment of $3,400,000, net of
       direct costs.


NOTE 10:  RELATED PARTY TRANSACTIONS

       During 1997 and 1996, certain transactions were made between the Company
       and certain related parties, all of which management believes were at
       arms length. These transactions included payments to two of the Company's
       directors in 1997 and one director in 1996 for consulting services of
       $44,000 and $15,000 in 1997 and 1996, respectively. The Company also had
       related party transactions with respect to the purchase of certain
       software development and components from a company which is partially
       owned by one of the Company's key employees. The amount of contract
       software and hardware purchased from this party in the ordinary course of
       doing business was $827,000 and $769,000 in 1997 and 1996, respectively;
       as well, $ 57,000 and $ 81,000 is included in trade accounts payable on
       the Consolidated Balance Sheets at December 31, 1997 and 1996,
       respectively.

                                       20
<PAGE>   18

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
- --------------------------------------------------------------------------------

NOTE 11:  SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION

<TABLE>
<CAPTION>
       (Thousands)

       FOR THE YEAR                                     1997              1996             1995

<S>                                                  <C>               <C>              <C>
       Cash paid (received) during the year for-
           Interest                                  $     488         $     599        $     563
           Income taxes                                   (391)            1,778               85

       Supplemental schedule of noncash financing
         activities-
           Class AA preferred stock conversion               -                 -            1,200
           Accrual of preferred stock dividends              -                 -               96
                                                     ============================================
</TABLE>


NOTE 12:  DISCLOSURES ABOUT THE FAIR VALUE OF FINANCIAL INSTRUMENTS

       The following methods and assumptions were used to estimate the fair
       value of each class of financial instrument for which it is practicable
       to estimate that value:

          a. Cash and Cash Equivalents - The carrying amount of these assets on
       the Company's Consolidated Balance Sheet approximates their fair value
       because of the short maturity of these instruments.

          b. Long-term Debt and Capital Lease Obligations - The fair value of
       this long-term indebtedness as of December 31, 1997 and 1996 were
       approximately $ 5,536,792 and $ 5,528,782 based on a discounted cash flow
       analysis, using the prevailing cost of capital for the Company as of each
       date.



                                       21
<PAGE>   19

REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS
- --------------------------------------------------------------------------------


To BTU International, Inc.:


We have audited the accompanying consolidated balance sheets of BTU
International, Inc. (a Delaware corporation) and subsidiaries as of December 31,
1997 and 1996, and the related consolidated statements of operations,
stockholders' investment and cash flows for each of the three years in the
period ended December 31, 1997. These financial statements are the
responsibility of the Company's management. Our responsibility is to express an
opinion on these financial statements based on our audits. We did not audit the
financial statements of BTU Europe Ltd. (a subsidiary of the Company), which
statements reflect total assets, total revenues and total net income of 3
percent, 5 percent and 49 percent in 1997 and 5 percent, 6 percent and 9 percent
in 1996, respectively, of the consolidated totals. Those statements were audited
by other auditors whose report has been furnished to us and our opinion, insofar
as it relates to the amounts included for that entity, is based solely on the
report of the other auditors.

We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits and the report of other auditors provide a reasonable
basis for our opinion.

In our opinion, based on our audit and the report of other auditors, the
financial statements referred to above present fairly, in all material respects,
the financial position of BTU International, Inc. and subsidiaries as of
December 31, 1997 and 1996, and the results of their operations and their cash
flows for each of the three years in the period ended December 31, 1997 in
conformity with generally accepted accounting principles.




                                                             ARTHUR ANDERSEN LLP

Boston, Massachusetts
February 13, 1998



                                       22
<PAGE>   20

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

                        FINANCIAL INFORMATION BY QUARTER
                                   (UNAUDITED)

<TABLE>
<CAPTION>
(Thousands, except per share amounts)
                                                              March 30,      June 29,      Sept. 28,       Dec. 31,

<S>                                                       <C>              <C>            <C>            <C>       
1997     NET SALES                                        $    11,026      $   12,799     $   12,722     $   15,571
                                                          ---------------------------------------------------------
         GROSS PROFIT                                           4,791           5,168          5,165          6,563
                                                          ---------------------------------------------------------
         OPERATING INCOME                                        (405)            625            601          1,179
                                                          ---------------------------------------------------------
         NET INCOME                                              (276)            303            485            738
                                                          =========================================================
         EARNINGS PER SHARE
              BASIC                                       $     (0.04)     $     0.04     $     0.07     $     0.10
                                                          ---------------------------------------------------------
              DILUTED                                     $     (0.04)     $     0.04     $     0.07     $     0.10
                                                          ---------------------------------------------------------
         WEIGHTED AVERAGE SHARES OUTSTANDING
                   BASIC                                        7,280           7,281          7,287          7,306
                                                          ---------------------------------------------------------
                   DILUTED                                      7,304           7,307          7,386          7,432
                                                          ---------------------------------------------------------


                                                            March 31,        June 30,      Sept. 29,       Dec. 31,

1996     Net sales                                        $    11,748     $    11,746     $   10,373     $   11,944
                                                          ---------------------------------------------------------
         Gross profit                                           5,248           4,761          4,280          4,754
                                                          ---------------------------------------------------------
         Operating income                                         507             404            117             42
                                                          ---------------------------------------------------------
         Net income                                               357           3,093             74             36
                                                          =========================================================
         Earnings per share
              Basic                                       $      0.05     $      0.42     $     0.01     $     0.01
                                                          ---------------------------------------------------------
              Diluted                                     $      0.05     $      0.42     $     0.01     $     0.01
                                                          ---------------------------------------------------------
         Weighted average shares outstanding
                   Basic                                        7,289           7,297          7,331          7,299
                                                          ---------------------------------------------------------
                   Diluted                                      7,365           7,345          7,359          7,323
                                                          ---------------------------------------------------------
</TABLE>



                                       23
<PAGE>   21

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

                  FINANCIAL INFORMATION BY QUARTER (CONTINUED)
                                   (UNAUDITED)


<TABLE>
<CAPTION>
        COMMON STOCK MARKET PRICES PER SHARE FOR THE QUARTERS ENDED       HIGH            LOW



<S>                                                                   <C>             <C>       
        MARCH 30,1997                                                 $    4.000      $    2.875
        JUNE 29, 1997                                                      4.625           2.500
        SEPTEMBER 28, 1997                                                 6.875           3.500
        DECEMBER 31, 1997                                                  7.438           5.063

                                                                 ====================================



        March 31, 1996                                                $    7.375      $    4.188
        June 30, 1996                                                      6.250           3.875
        September 29, 1996                                                 4.250           2.875
        December 31, 1996                                                  3.563           2.625

                                                                 ====================================
</TABLE>



       The Company's common stock is traded in The Nasdaq National Market under
       the symbol BTUI. There were approximately 490 stockholders of record as
       of March 24, 1998.



                                       24
<PAGE>   22

CORPORATE INFORMATION

<TABLE>
<CAPTION>

<S>                                                          <C>
TRANSFER AGENT                                               HEADQUARTERS
Bank of Boston                                               BTU International, Inc.
C/O Boston EquiServe, L.P.                                   23 Esquire Road
Mail Stop 45-02-64                                           North Billerica, Massachusetts 01862
PO Box 644
Boston, Massachusetts 02105-0644

                                                             OFFICERS
STOCK LISTING                                                Paul J. van der Wansem
BTU International, Inc.                                      Chairman, President and Chief Executive Officer
common stock is traded on
The Nasdaq National Market                                   Santo J. DiNaro
under the symbol "BTUI"                                      Vice President of Operations and Engineering

                                                             Thomas P. Kealy
SEC FORM 10-K                                                Vice President, Corporate Controller and
A copy of the company's Form 10-K,                              Chief Accounting Officer
filed with the Securities and Exchange
Commission (SEC), is available
without charge upon written request to:                      DIRECTORS
                                                             Paul J. van der Wansem
Vice President, Corporate Controller                         Chairman, President and Chief Executive Officer
BTU International, Inc.
23 Esquire Road                                              Alexander V. d'Arbeloff
North Billerica, Massachusetts 01862                         Chairman
(978) 667-4111, extension 106                                Teradyne, Inc.

                                                             David A.B. Brown
GENERAL COUNSEL                                              President
Ropes & Gray                                                 The Windsor Group, Inc.
One International Place
Boston, Massachusetts 02110                                  Dr. Jeffrey Chuan Chu
                                                             Chairman
                                                             Columbia International Corporation
INDEPENDENT PUBLIC
ACCOUNTANTS
Arthur Andersen LLP                                          AUDIT COMMITTEE
225 Franklin Street                                          Alexander V. d'Arbeloff
Boston, Massachusetts 02110                                  David A.B. Brown
                                                             Dr. Jeffrey Chuan Chu

ANNUAL MEETING
The annual meeting of stockholders                           COMPENSATION COMMITTEE
will be held on May 22, 1998                                 Alexander V. d'Arbeloff
at 10:00 AM EST at BTU International,                        David A.B. Brown
23 Esquire Road, North Billerica,                            Dr. Jeffrey Chuan Chu
Massachusetts 01862
</TABLE>


                                       25

<PAGE>   1




                                                                      Exhibit 21


                         SUBSIDIARIES OF THE REGISTRANT


                 BTU Overseas, Limited (Fed. I.D. # 04-2757966)
               BTU Engineering FSC, Inc. (Fed. I.D. # 04-2736403)
                                 BTU Europe LTD
                                    BTU GmbH





<PAGE>   1




                                                                    Exhibit 23.1

                    CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

     As independent public accountants, we hereby consent to the incorporation
of our reports included in and incorporated by reference in this Form 10-K, into
the Company's previously filed Registration Statements on Form S-8 File No.
33-28344, File No. 33-29113, File No. 33-59045 and File No. 33-59081.






Arthur Andersen LLP





Boston, Massachusetts,
March 26, 1998



<TABLE> <S> <C>


<ARTICLE> 5
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               DEC-31-1997
<EXCHANGE-RATE>                                   1.00
<CASH>                                          11,873
<SECURITIES>                                         0
<RECEIVABLES>                                   12,494
<ALLOWANCES>                                       160
<INVENTORY>                                     10,028
<CURRENT-ASSETS>                                35,359
<PP&E>                                          12,691
<DEPRECIATION>                                   8,077
<TOTAL-ASSETS>                                  40,379
<CURRENT-LIABILITIES>                            9,261
<BONDS>                                          5,313
                                0
                                          0
<COMMON>                                            77
<OTHER-SE>                                      23,481
<TOTAL-LIABILITY-AND-EQUITY>                    40,379
<SALES>                                         52,118
<TOTAL-REVENUES>                                52,118
<CGS>                                           30,431
<TOTAL-COSTS>                                   30,431
<OTHER-EXPENSES>                                 3,808
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 488
<INCOME-PRETAX>                                  1,649
<INCOME-TAX>                                       399
<INCOME-CONTINUING>                              1,250
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     1,250
<EPS-PRIMARY>                                     0.17
<EPS-DILUTED>                                     0.17
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 5
<RESTATED> 
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1995
<PERIOD-START>                             JAN-01-1995
<PERIOD-END>                               DEC-31-1995
<EXCHANGE-RATE>                                   1.00
<CASH>                                           6,145
<SECURITIES>                                         0
<RECEIVABLES>                                   11,699
<ALLOWANCES>                                       191
<INVENTORY>                                      9,899
<CURRENT-ASSETS>                                27,981
<PP&E>                                          10,943
<DEPRECIATION>                                   6,804
<TOTAL-ASSETS>                                  35,834
<CURRENT-LIABILITIES>                            9,976
<BONDS>                                          5,715
                                0
                                          0
<COMMON>                                            76
<OTHER-SE>                                      18,620
<TOTAL-LIABILITY-AND-EQUITY>                    35,834
<SALES>                                         58,274
<TOTAL-REVENUES>                                58,274
<CGS>                                           32,022
<TOTAL-COSTS>                                   32,022
<OTHER-EXPENSES>                                 4,266
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 563
<INCOME-PRETAX>                                  6,203
<INCOME-TAX>                                     1,130
<INCOME-CONTINUING>                              5,073
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     5,073
<EPS-PRIMARY>                                      .69
<EPS-DILUTED>                                      .68
        

</TABLE>


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