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                                                                     EXHIBIT 4.1

                                  $200,000,000

                                   CYMER, INC.

                  3.5% CONVERTIBLE SUBORDINATED NOTES DUE 2009

                               PURCHASE AGREEMENT

                                                               February 12, 2002

CREDIT SUISSE FIRST BOSTON CORPORATION
MERRILL LYNCH PIERCE FENNER & SMITH
         INCORPORATED
C/O CREDIT SUISSE FIRST BOSTON CORPORATION
    Eleven Madison Avenue
    New York, N.Y. 10010-3629

Dear Sirs:

     1.  INTRODUCTORY. Cymer, Inc., a Nevada corporation (the "COMPANY"),
proposes, subject to the terms and conditions stated herein, to issue and sell
to the several initial purchasers named in Schedule A hereto (the "PURCHASERS")
U.S.$200 million principal amount of its 3.5% Convertible Subordinated Notes due
2009 (the "FIRM SECURITIES") and also proposes to grant to the Purchasers an
option, exercisable from time to time by Credit Suisse First Boston Corporation
to purchase an aggregate of up to an additional $50 million principal amount
("OPTIONAL SECURITIES") of its 3.5% Convertible Subordinated Notes due 2009,
each to be issued under an indenture, dated as of February 15, 2002 (the
"INDENTURE"), between the Company and State Street Bank and Trust Company of
California, N.A., as Trustee. The Firm Securities and the Optional Securities
(which the Purchasers may elect to purchase pursuant to Section 3 hereof),
together with the shares of the Company's common stock into which the Firm
Securities and Optional Securities are convertible in accordance with the
Indenture, are herein collectively called the "OFFERED SECURITIES". The United
States Securities Act of 1933 is herein referred to as the "SECURITIES ACT."

     The holders of the Offered Securities will be entitled to the benefits of a
Registration Rights Agreement (as hereinafter defined), pursuant to which the
Company will agree to file a registration statement with the Securities and
Exchange Commission (the "COMMISSION") registering the resale of the Offered
Securities and the Underlying Shares (as hereinafter defined) under the
Securities Act.

     The Company hereby agrees with the several Purchasers as follows:

     2.  REPRESENTATIONS AND WARRANTIES OF THE COMPANY. The Company represents
and warrants to, and agrees with, the several Purchasers that:

             (a) An offering circular relating to the Offered Securities to be
     offered by the Purchasers has been prepared by the Company. Such offering
     circular (the "OFFERING CIRCULAR"), as supplemented as of the date of this
     Agreement, together with the documents, including the Exchange Act Reports
     (defined below) incorporated by reference therein, listed in Schedule B
     hereto and any other

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     document approved by the Company and listed on Schedule B hereto for use in
     connection with the contemplated resale of the Offered Securities are
     hereinafter collectively referred to as the "OFFERING DOCUMENT". On the
     date of this Agreement, the Offering Document does not include any untrue
     statement of a material fact or omit to state any material fact necessary
     in order to make the statements therein, in the light of the circumstances
     under which they were made, not misleading. The preceding sentence does not
     apply to statements in or omissions from the Offering Document based upon
     written information furnished to the Company by the Purchasers through
     Credit Suisse First Boston Corporation ("CSFBC") specifically for use
     therein, it being understood and agreed that the only such information is
     that described as such in Section 7(b) hereof. Except as disclosed in the
     Offering Document, on the date of this Agreement, the Company's Annual
     Report on Form 10-K most recently filed with the Commission and all
     subsequent reports (collectively, the "EXCHANGE ACT REPORTS") which have
     been filed by the Company with the Commission pursuant to the Securities
     Exchange Act of 1934 (the "EXCHANGE ACT"), as supplemented by the Offering
     Circular, do not include any untrue statement of a material fact or omit to
     state any material fact necessary to make the statements therein, in the
     light of the circumstances under which they were made, not misleading. Such
     documents, when they were filed with the Commission, conformed in all
     material respects to the requirements of the Exchange Act and the rules and
     regulations of the Commission thereunder.

             (b) The Company has been duly incorporated and is an existing
     corporation in good standing under the laws of the State of Nevada, with
     corporate power and authority to own its properties and conduct its
     business as described in the Offering Document; and the Company is duly
     qualified to do business as a foreign corporation in good standing in all
     other jurisdictions in which its ownership or lease of property or the
     conduct of its business requires such qualification, except for such
     jurisdictions where the failure to so qualify or to be in good standing
     would not, individually or in the aggregate, result in a Material Adverse
     Effect (as defined below).

             (c) Each subsidiary of the Company has been duly incorporated and
     is an existing corporation in good standing under the laws of the
     jurisdiction of its incorporation, with power and authority (corporate and
     other) to own its properties and conduct its business as described in the
     Offering Document; and each subsidiary of the Company is duly qualified to
     do business as a foreign corporation in good standing in all other
     jurisdictions in which its ownership or lease of property or the conduct of
     its business requires such qualification, except for such jurisdictions
     where the failure to so qualify or to be in good standing would not,
     individually or in the aggregate, result in a Material Adverse Effect (as
     defined below); all of the issued and outstanding capital stock of each
     subsidiary of the Company has been duly authorized and validly issued and
     is fully paid and nonassessable; and the capital stock of each subsidiary
     owned by the Company, directly or through subsidiaries, is owned free from
     liens, encumbrances and defects. The Company does not own or control,
     directly or indirectly, any corporation, association or other entity other
     than the subsidiaries listed in Exhibit 21.1 to the Company's Annual Report
     on Form 10-K for the fiscal year ended December 31, 2000. Cymer Japan,
     Inc., a corporation organized under the laws of Japan (the "SUBSIDIARY" or
     "CYMER JAPAN"), is the only subsidiary of the Company which constitutes a
     "significant subsidiary," as such term is defined in Rule 1-02(w) of
     Regulation S-X promulgated by the Commission.

             (d) The Indenture has been duly authorized by the Company; the
     Offered Securities have been duly authorized by the Company; and when the
     Offered Securities are delivered and paid for pursuant to this Agreement on
     each Closing Date (as defined below), the Indenture will have been duly
     executed and delivered, such Offered Securities will have been duly
     executed, authenticated, issued and delivered and will conform in all
     material respects to the description thereof contained in the Offering
     Document and the Indenture and such Offered Securities will constitute
     valid and legally binding obligations of the Company, enforceable in
     accordance with their terms, subject to bankruptcy, insolvency, fraudulent
     transfer, reorganization, moratorium and similar laws of general
     applicability relating to or affecting creditors' rights and to general
     equity principles.

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             (e) When the Firm Securities and the Optional Securities are
     delivered and paid for pursuant to this Agreement on each Closing Date,
     such Firm Securities and such Offered Securities will be convertible into
     the shares of Common Stock, $.001 par value per share ("UNDERLYING
     SHARES"), of the Company in accordance with the terms of the Indenture; the
     Underlying Shares initially issuable upon conversion of such Offered
     Securities have been duly authorized and reserved for issuance upon such
     conversion and, when issued upon such conversion, will be validly issued,
     fully paid and nonassessable; the outstanding shares of Common Stock, $.001
     par value per share, of the Company have been duly authorized and validly
     issued, are fully paid and nonassessable and conform in all material
     respects to the description thereof contained in the Offering Document; and
     the stockholders of the Company have no preemptive rights with respect to
     the Offered Securities or the Underlying Shares.

             (f) Except as disclosed in the Offering Document, there are no
     contracts, agreements or understandings between the Company and any person
     that would give rise to a valid claim against the Company or any Purchaser
     for a brokerage commission, finder's fee or other like payment in
     connection with the transactions contemplated by this Agreement.

             (g) No consent, approval, authorization, or order of, or filing
     with, any governmental agency or body or any court is required for the
     consummation of the transactions contemplated by this Agreement, the
     Registration Rights Agreement, to be dated February 15, 2002, between the
     Company and the Purchasers (the "REGISTRATION RIGHTS AGREEMENT"), or in
     connection with the issuance and sale of the Offered Securities by the
     Company except as required by federal and state securities laws in
     connection with the registration of the Offered Securities and to the
     qualification of the Indenture pursuant to the Registration Rights
     Agreement and as required by state securities laws in connection with the
     distribution of the Offered Securities.

             (h) Neither the Company nor any of its subsidiaries is in violation
     of its charter or by-laws or is in default (or, with the giving of notice
     or lapse of time, would be in default) ("DEFAULT") under any indenture,
     mortgage, loan or credit agreement, note, contract, franchise, lease,
     agreement or other instrument to which the Company or any of its
     subsidiaries is a party or by which it or any of them may be bound, or to
     which any of the property or assets of the Company or any of its
     subsidiaries is subject (each, an "EXISTING AGREEMENT"), except such
     Default or Defaults as, individually or in the aggregate, do not have and
     would not reasonably be expected to have a Material Adverse Effect (as
     defined below). The execution, delivery and performance of the Indenture,
     this Agreement, and the Registration Rights Agreement, and the issuance and
     sale of the Offered Securities and compliance with the terms and provisions
     thereof (i) will not result in a breach or violation of any of the terms
     and provisions of, or constitute a default under, (A) any statute, any
     rule, regulation or order of any governmental agency or body or any court,
     domestic or foreign, having jurisdiction over the Company or Cymer Japan or
     any of their properties, or (B) the charter or by-laws of the Company or
     Cymer Japan and (ii) will not conflict with, constitute a breach of or
     Default under, result in a Debt Repayment Triggering Event (as defined
     below) under, result in the creation or imposition of any lien, charge or
     encumbrance upon any property or assets of the Company or Cymer Japan
     pursuant to, or require the consent of any other party to, any Existing
     Agreement, except, in the case of each of the foregoing clauses (i) and
     (ii), for such breaches, violations, defaults, conflicts, Defaults, liens,
     charges or encumbrances as would not, individually or in the aggregate,
     have a Material Adverse Effect. The Company has full power and authority to
     authorize, issue and sell the Offered Securities as contemplated by this
     Agreement. As used herein, a "DEBT REPAYMENT TRIGGERING EVENT" means any
     event or condition which gives, or with the giving of notice or lapse of
     time would give, the holder of any note, debenture or other evidence of
     indebtedness (or any person acting on such holder's behalf) the right to
     require the repurchase, redemption or repayment of all or a portion of such
     indebtedness by the Company or any of its subsidiaries.

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             (i) This Agreement and the Registration Rights Agreement have been
     duly authorized, executed and delivered by the Company.

             (j) Except as disclosed in the Offering Document, the Company and
     its subsidiaries have good and marketable title to all real properties and
     all other properties and assets owned by them, in each case free from
     liens, encumbrances and defects that would materially affect the aggregate
     value thereof or materially interfere with the collective use made or to be
     made thereof by them; and except as disclosed in the Offering Document, the
     Company and its subsidiaries hold any leased real or personal property
     under valid and enforceable leases with no exceptions that would materially
     interfere with the collective use made or to be made thereof by them.

             (k) The Company and its subsidiaries possess adequate certificates,
     authorities or permits issued by appropriate governmental agencies or
     bodies necessary to conduct the business now operated by them and have not
     received any notice of proceedings relating to the revocation or
     modification of any such certificate, authority or permit that, if
     determined adversely to the Company or any of its subsidiaries, would
     individually or in the aggregate have a material adverse effect on the
     condition (financial or other), business, properties or results of
     operations of the Company and its subsidiaries taken as a whole or on the
     Company's ability to perform its obligations under this Agreement
     (including such obligations to issue and sell the Offered Securities as
     contemplated hereby), the Indenture, the Registration Rights Agreement or
     the Offered Securities ("MATERIAL ADVERSE EFFECT").

             (l) No labor dispute with the employees of the Company or any
     subsidiary exists or, to the knowledge of the Company, is imminent that
     would reasonably be expected to have a Material Adverse Effect.

             (m) The Company and its subsidiaries own, possess or can acquire on
     reasonable terms, adequate trademarks, trade names and other rights to
     inventions, know-how, patents, copyrights, confidential information and
     other intellectual property (collectively, "INTELLECTUAL PROPERTY RIGHTS")
     necessary to conduct the business now operated by them, or presently
     employed by them, and except as disclosed in the Offering Document have not
     received any written notice of infringement of or conflict with asserted
     rights of others with respect to any intellectual property rights that, if
     determined adversely to the Company or any of its subsidiaries, would
     individually or in the aggregate have a Material Adverse Effect.

             (n) Except as disclosed in the Offering Document, neither the
     Company nor any of its subsidiaries is in violation of any statute, any
     rule, regulation, decision or order of any governmental agency or body or
     any court, domestic or foreign, relating to the use, disposal or release of
     hazardous or toxic substances or relating to the protection or restoration
     of the environment or human exposure to hazardous or toxic substances
     (collectively, "ENVIRONMENTAL LAWS"), owns or operates any real property
     contaminated with any substance that is subject to any environmental laws,
     is liable for any off-site disposal or contamination pursuant to any
     environmental laws, or is subject to any claim relating to any
     environmental laws, in each case which violation, contamination, liability
     or claim would individually or in the aggregate have a Material Adverse
     Effect; and the Company is not aware of any pending investigation which
     would reasonably be expected to lead to such a claim.

             (o) Except as disclosed in the Offering Document, there are no
     pending actions, suits or proceedings against or affecting the Company, any
     of its subsidiaries or any of their respective properties that, if
     determined adversely to the Company or any of its subsidiaries, would
     individually or in the aggregate have a Material Adverse Effect; and no
     such actions, suits or proceedings have been overtly threatened or, to the
     Company's knowledge, are contemplated.

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             (p) The financial statements included or incorporated by reference
     in the Offering Document present fairly the financial position of the
     Company and its consolidated subsidiaries as of the respective dates
     thereof and their results of operations and cash flows for the periods
     covered thereby, and such financial statements have been prepared in
     conformity with the generally accepted accounting principles in the United
     States applied on a consistent basis.

             (q) Except as disclosed in the Offering Document, since the date of
     the latest audited financial statements included in the Offering Document
     there has been no material adverse change, nor any development or event
     involving a prospective material adverse change, in the condition
     (financial or other), business, properties or results of operations of the
     Company and its subsidiaries taken as a whole, and, except as disclosed in
     or contemplated by the Offering Document, there has been no dividend or
     distribution of any kind declared, paid or made by the Company on any class
     of its capital stock.

             (r) The Company is not an open-end investment company, unit
     investment trust or face-amount certificate company that is or is required
     to be registered under Section 8 of the United States Investment Company
     Act of 1940 (the "INVESTMENT COMPANY ACT"); and the Company is not and,
     after giving effect to the offering and sale of the Offered Securities and
     the application of the proceeds thereof as described in the Offering
     Document, will not be an "investment company" as defined in the Investment
     Company Act.

             (s) No securities of the same class (within the meaning of Rule
     144A(d)(3) under the Securities Act) as the Offered Securities are listed
     on any national securities exchange registered under Section 6 of the
     Exchange Act or quoted in a U.S. automated inter-dealer quotation system.

             (t) Assuming the accuracy of the representations and warranties of
     the Purchasers contained in Section 4 below, the offer and sale of the
     Offered Securities to the Purchasers in the manner contemplated by this
     Agreement will be exempt from the registration requirements of the
     Securities Act by reason of Section 4(2) thereof; and in connection with
     such offer and sale of the Offered Securities by the Company to the
     Purchasers, it is not necessary to qualify an indenture in respect of the
     Offered Securities under the United States Trust Indenture Act of 1939, as
     amended (the "TRUST INDENTURE ACT").

             (v) Neither the Company, nor any of its affiliates, nor any person
     acting on its or their behalf (i) has, within the six-month period prior to
     the date hereof, offered or sold in the United States or to any U.S. person
     (as such terms are defined in Regulation S under the Securities Act) the
     Offered Securities or any security of the same class or series as the
     Offered Securities or (ii) has offered or will offer or sell the Offered
     Securities (A) in the United States by means of any form of general
     solicitation or general advertising within the meaning of Rule 502(c) under
     the Securities Act or (B) with respect to any such securities sold in
     reliance on Rule 903 of Regulation S ("REGULATION S") under the Securities
     Act, by means of any directed selling efforts within the meaning of Rule
     902(c) of Regulation S. The Company, its affiliates and any person acting
     on its or their behalf have complied and will comply with the offering
     restrictions requirement of Regulation S as applicable. The Company has not
     entered and will not enter into any contractual arrangement with respect to
     the distribution of the Offered Securities except for this Agreement and
     the Registration Rights Agreement.

             (w) The Company is subject to Section 13 or 15(d) of the Exchange
     Act.

     3.  PURCHASE, SALE AND DELIVERY OF OFFERED SECURITIES. On the basis of the
representations, warranties and agreements herein contained, but subject to the
terms and conditions herein set forth, the Company agrees to sell to the
Purchasers and the Purchasers agree, severally and not jointly, to purchase from
the Company, at a purchase price of 97% of the principal amount thereof, plus
accrued interest from February 15, 2002 to the

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First Closing Date (as hereinafter defined), the respective principal amounts of
the Firm Securities set forth opposite the names of the several Purchasers in
Schedule A hereto.

     The Company will deliver against payment of the purchase price the Firm
Securities to CSFBC for the accounts of the Purchasers in the form of one or
more permanent global securities in definitive form (the "FIRM GLOBAL
SECURITIES") deposited with the Trustee as custodian for The Depository Trust
Company ("DTC") and registered in the name of Cede & Co., as nominee for DTC.
Interests in any permanent global securities will be held only in book-entry
form through DTC, except in the limited circumstances described in the Offering
Document. Payment for the Firm Securities shall be made by the Purchasers in
Federal (same day) funds by, at the Company's option, official check or checks
or wire transfer to an account at a bank acceptable to CSFBC drawn to the order
of the Company at the office of Cooley Godward LLP, San Diego, at 10:00 A.M.
(New York time), on February 15, 2002, or at such other time not later than
seven full business days thereafter as CSFBC and the Company determine, such
time being herein referred to as the "FIRST CLOSING DATE", against delivery to
the Trustee as custodian for DTC of the Firm Global Securities representing all
of the Firm Securities. The Firm Global Securities will be made available for
checking at the above office of CSFBC at least 24 hours prior to the First
Closing Date.

     In addition, upon written notice from CSFBC given to the Company from time
to time not more than 30 days subsequent to the date of this Agreement, the
Purchasers may purchase all or less than all of the Optional Securities at a
purchase price of 97% of the principal amount of Offered Securities (including
any accrued interest thereon to the related Optional Closing Date, defined
below). The Company agrees to sell to the Purchasers the principal amount of
Optional Securities specified in such notice and the Purchasers agree, severally
and not jointly, to purchase such Optional Securities. Such Optional Securities
shall be purchased from the Company for the account of each Purchaser in the
same proportion as the principal amount of the Firm Securities set forth
opposite such Purchaser's name in Schedule A hereto bears to the total principal
amount of Firm Securities. No Optional Securities shall be sold or delivered
unless the Firm Securities previously have been, or simultaneously are, sold and
delivered. The right to purchase the Optional Securities or any portion thereof
may be exercised from time to time and to the extent not previously exercised
may be surrendered and terminated at any time upon notice by CSFBC to the
Company.

     Each time for the delivery of and payment for the Optional Securities,
being herein referred to as the "OPTIONAL CLOSING Date", which may be the First
Closing Date (the First Closing Date and each Optional Closing Date, if any,
being sometimes referred to as a "CLOSING DATE"), shall be determined by CSFBC
on behalf of the several Purchasers but shall not be earlier than two nor later
than seven full business days after written notice of election to purchase
Optional Securities is given. The Company will deliver against payment of the
purchase price the Optional Securities being purchased on each Optional Closing
Date in the form of one or more permanent global securities in definitive form
(the "OPTIONAL GLOBAL SECURITIES") deposited with the Trustee as custodian for
DTC and registered in the name of Cede & Co., as nominee for DTC. Payment for
the Optional Securities being purchased on each Optional Closing Date shall be
made by the Purchasers in Federal (same day) funds by, at the option of the
Company, official check or checks or by wire transfer to an account at a bank
acceptable to CSFBC drawn to the order of the Company at the office of Cooley
Godward LLP, San Diego, against delivery to the Trustee as Custodian for DTC of
the Optional Global Securities being purchased on such Optional Closing Date.

     4.  REPRESENTATIONS BY PURCHASERS; RESALE BY PURCHASERS.

             (a) Each Purchaser severally represents and warrants to the Company
     that it is an "accredited investor" within the meaning of Regulation D
     under the Securities Act.

             (b) Each Purchaser severally acknowledges that the Offered
     Securities have not been registered under the Securities Act and may not be
     offered or sold within the United States or to, or for the account or
     benefit of, U.S. persons except pursuant to an exemption from the
     registration requirements of the Securities Act. Each Purchaser severally
     represents and agrees that it has offered

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     and sold the Offered Securities, and will offer and sell the Offered
     Securities only in accordance with Rule 144A under the Securities Act
     ("RULE 144A"). Accordingly, neither such Purchaser nor its affiliates, nor
     any persons acting on its or their behalf, have engaged or will engage in
     any directed selling efforts with respect to the Offered Securities, and
     such Purchaser, its affiliates and all persons acting on its or their
     behalf have complied and will comply with the offering restrictions
     requirement of Regulation S and Rule 144A.

             (c) Each Purchaser severally agrees that it and each of its
     affiliates has not entered and will not enter into any contractual
     arrangement with respect to the distribution of the Offered Securities
     except for any such arrangements with the other Purchasers or affiliates of
     the other Purchasers or with the prior written consent of the Company.

             (d) Each Purchaser severally agrees that it and each of its
     affiliates will not offer or sell the Offered Securities in the United
     States (i) by means of any form of general solicitation or general
     advertising within the meaning of Rule 502(c) under the Securities Act,
     including, but not limited to (A) any advertisement, article, notice or
     other communication published in any newspaper, magazine or similar media
     or broadcast over television or radio, or (B) any seminar or meeting whose
     attendees have been invited by any general solicitation or general
     advertising or (ii) in any manner involving a public offering within the
     meaning of Section 4(2) of the Securities Act. Each Purchaser severally
     agrees, with respect to resales of any of the Offered Securities made in
     reliance on Rule 144A, to deliver either with the confirmation of such
     resale or otherwise prior to settlement of such resale a notice to the
     effect that the resale of such Offered Securities has been made in reliance
     upon the exemption from the registration requirements of the Securities Act
     provided by Rule 144A

             (e) Each Purchaser severally represents and agrees that (i) it has
     not offered or sold and prior to the expiry of a period of six months from
     the closing date, will not offer or sell any Offered Securities to persons
     in the United Kingdom except to persons whose ordinary activities involve
     them in acquiring, holding, managing or disposing of investments (as
     principal or agent) for the purposes of their businesses or otherwise in
     circumstances which have not resulted and will not result in an offer to
     the public in the United Kingdom within the meaning of the Public Offers of
     Securities Regulations 1995; (ii) it has only communicated or caused to be
     communicated and will only communicate or cause to be communicated any
     invitation or inducement to engage in investment activity (within the
     meaning of section 21 of the Financial Services and Markets Act 2000 (the
     "FSMA")) received by it in connection with the issue or sale of any Offered
     Securities in circumstances in which section 21(1) of the FSMA does not
     apply to the Issuer; and (iii) it has complied and will comply with all
     applicable provisions of the FSMA with respect to anything done by it in
     relation to the Offered Securities in, from or otherwise involving the
     United Kingdom.

     5.  CERTAIN AGREEMENTS OF THE COMPANY. The Company agrees with the several
Purchasers that:

             (a) The Company will advise CSFBC promptly of any proposal to amend
     or supplement the Offering Document and, unless required pursuant to
     applicable law, will not effect such amendment or supplementation without
     CSFBC's consent, which consent will not be unreasonably withheld. If, at
     any time prior to the completion of the resale of the Offered Securities by
     the Purchasers, any event occurs as a result of which the Offering Document
     as then amended or supplemented would include an untrue statement of a
     material fact or omit to state any material fact necessary in order to make
     the statements therein, in the light of the circumstances under which they
     were made, not misleading, the Company promptly will notify CSFBC of such
     event and promptly will prepare, at its own expense, an amendment or
     supplement which will correct such statement or omission. Neither CSFBC's
     consent to, nor the Purchasers' delivery to offerees or investors of, any
     such amendment or supplement shall constitute a waiver of any of the
     conditions set forth in Section 6.

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             (b) The Company will furnish to CSFBC copies of the Offering
     Circular and all amendments and supplements to such documents, in each case
     as soon as available and in such quantities as CSFBC requests, and the
     Company will furnish to CSFBC on the First Closing Date hereof three copies
     of the Offering Circular signed by a duly authorized officer of the
     Company, one of which will include the independent accountants' reports
     included or incorporated by reference therein manually signed by KPMG LLP.
     At any time when the Company is not subject to Section 13 or 15(d) of the
     Exchange Act, the Company will promptly furnish or cause to be furnished to
     CSFBC (and upon request, to each of the other Purchasers) and, upon request
     of holders and prospective purchasers of the Offered Securities, to such
     holders and purchasers, copies of the information required to be delivered
     to holders and prospective purchasers of the Offered Securities pursuant to
     Rule 144A(d)(4) under the Securities Act (or any successor provision
     thereto) in order to permit compliance with Rule 144A in connection with
     resales by such holders of the Offered Securities. The Company will pay the
     expenses of printing and distributing to the Purchasers all such documents.

             (c) The Company will arrange for the qualification of the Offered
     Securities for sale and the determination of their eligibility for
     investment under the laws of such jurisdictions in the United States and
     Canada as CSFBC reasonably designates and will continue such qualifications
     in effect so long as required for the resale of the Offered Securities by
     the Purchasers, provided that the Company will not be required to qualify
     as a foreign corporation or to file a general consent to service of process
     in any such state or take any action that would subject it to taxation in
     any jurisdiction where it has not be subject.

             (d) During the period of two years after the later of the First
     Closing Date and the last Optional Closing Date, the Company will, upon
     request, furnish to CSFBC, and upon request to each of the other
     Purchasers, and any holder of Offered Securities a copy of the restrictions
     on transfer applicable to the Offered Securities.

             (e) During the period of two years after the later of the First
     Closing Date and the last Optional Closing Date, the Company will not, and
     will not permit any of its affiliates (as defined in Rule 144 under the
     Securities Act) to, resell any of the Offered Securities that have been
     reacquired by any of them.

             (f) During the period of two years after the later of the First
     Closing Date and the last Optional Closing Date, the Company will not be or
     become, an open-end investment company, unit investment trust or
     face-amount certificate company that is or is required to be registered
     under Section 8 of the Investment Company Act.

             (g) The Company will pay all expenses incidental to the performance
     of its obligations under this Agreement, the Indenture, and the
     Registration Rights Agreement, including (i) the fees and expenses of the
     Trustee and its professional advisers; (ii) all expenses in connection with
     the execution, issue, authentication, packaging and initial delivery of the
     Offered Securities, the preparation and printing of this Agreement, the
     Registration Rights Agreement, the Offered Securities, the Indenture, the
     Offering Document and amendments and supplements thereto, and any other
     document approved by the Company relating to the issuance, offer, sale and
     delivery of the Offered Securities; (iii) the cost of qualifying the
     Offered Securities for trading in The Portal-SM- Market ("PORTAL") and any
     expenses incidental thereto; (iv) the cost of any advertising approved by
     the Company in connection with the issue of the Offered Securities; (v) any
     expenses (including fees and disbursements of counsel) incurred in
     connection with qualification of the Offered Securities for sale under the
     laws of such jurisdictions in the United States and Canada as CSFBC
     reasonably designates and the preparation of blue sky memoranda relating
     thereto; (vi) for any fees charged by investment rating agencies for the
     rating of the Offered Securities; and (vii) for expenses incurred in
     distributing the Offering Document (including any amendments and
     supplements thereto) to the Purchasers. It is understood, however, that
     except as provided in this Section and in Section 7, each Purchaser will
     pay

                                        8
<Page>

     all of its own costs and expenses, including, without limitation, the fees
     and disbursements of its counsel and transfer taxes on resales of any of
     the Offered Securities by it.

             (h) In connection with the offering, until CSFBC shall have
     notified the Company and the other Purchasers of the completion of the
     resale of the Offered Securities, neither the Company nor any of its
     affiliates has or will, either alone or with one or more other persons, bid
     for or purchase for any account in which it or any of its affiliates has a
     beneficial interest any Offered Securities or attempt to induce any person
     to purchase any Offered Securities; and neither it nor any of its
     affiliates will make bids or purchases for the purpose of creating actual,
     or apparent, active trading in, or of raising the price of, the Offered
     Securities.

             (i) For a period of 90 days after the date of the initial offering
     of the Offered Securities by the Purchasers, the Company will not offer,
     sell, contract to sell, pledge or otherwise dispose of, directly or
     indirectly, any United States dollar-denominated debt securities issued or
     guaranteed by the Company and having a maturity of more than one year from
     the date of issue, any shares of Common Stock of the Company or securities
     convertible into or exchangeable or exercisable for shares of Common Stock
     of the Company or warrants or other rights to purchase shares of Common
     Stock of the Company, or publicly disclose the intention to make any such
     offer, sale, pledge or disposition, without the prior written consent of
     CSFBC, except issuances of Offered Securities, Underlying Shares or Common
     Stock pursuant to the conversion or exchange of convertible or exchangeable
     securities or the exercise of warrants or options, in each case outstanding
     on the date hereof, issuances of Common Stock or grants of stock options to
     employees, officers and directors pursuant to the terms of a plan in effect
     on the date hereof, issuances of Offered Securities, the Underlying Shares
     or Common Stock pursuant to the exercise of such options or issuances of
     Offered Securities or Common Stock pursuant to the Company's dividend
     reinvestment plan, if in effect on the date hereof. The Company will not at
     any time offer, sell, contract to sell, pledge or otherwise dispose of,
     directly or indirectly, any securities under circumstances where such
     offer, sale, pledge, contract or disposition would cause the exemption
     afforded by Section 4(2) of the Securities Act, or the safe harbors of
     Regulation S to cease to be applicable to the offer and sale of the Offered
     Securities.

     6.  CONDITIONS OF THE OBLIGATIONS OF THE PURCHASERS. The obligations of
the several Purchasers to purchase and pay for the Firm Securities on the First
Closing Date and for the Optional Securities and on each Optional Closing Date
will be subject to the accuracy of the representations and warranties on the
part of the Company herein, to the accuracy of the statements of officers of the
Company made pursuant to the provisions hereof, to the performance by the
Company of its obligations hereunder and to the following additional conditions
precedent:

             (a) The Purchasers shall have received a letter, dated the date of
     this Agreement, of KPMG LLP in agreed form confirming that they are
     independent public accountants within the meaning of the Securities Act and
     the applicable published rules and regulations thereunder ("RULES AND
     REGULATIONS") and to the effect that:

                    (i)    in their opinion the financial statements examined by
             them and incorporated by reference in the Offering Document and in
             the Exchange Act Reports comply as to form in all material respects
             with the applicable accounting requirements of the Securities Act
             and the related published Rules and Regulations;

                    (ii)   they have performed the procedures specified by the
             American Institute of Certified Public Accountants for a review of
             interim financial information as described in Statement of Auditing
             Standards No. 71, Interim Financial Information, on the unaudited
             financial statements included in the Offering Document and in the
             Exchange Act Reports;

                                        9
<Page>

                    (iii)  on the basis of the review referred to in clause (ii)
             above, a reading of the latest available interim financial
             statements of the Company, inquiries of officials of the Company
             who have responsibility for financial and accounting matters and
             other specified procedures, nothing came to their attention that
             caused them to believe that:

                            (A) the unaudited financial statements incorporated
                    by reference in the Offering Document or in the Exchange Act
                    Reports do not comply as to form in all material respects
                    with the applicable accounting requirements of the
                    Securities Act and the related published Rules and
                    Regulations or any material modifications should be made to
                    such unaudited financial statements for them to be in
                    conformity with generally accepted accounting principles;

                            (B) at the date of the latest available balance
                    sheet read by such accountants, or at a subsequent specified
                    date not more than three business days prior to the date of
                    this Agreement, there was any change in the capital stock or
                    any increase in short-term indebtedness or long-term debt of
                    the Company and its consolidated subsidiaries or, at the
                    date of the latest available balance sheet read by such
                    accountants, there was any decrease in consolidated net
                    current assets or net assets, as compared with amounts shown
                    on the latest balance sheet incorporated by reference in the
                    Offering Document; or

                            (C) for the period from the closing date of the
                    latest income statement included in the Offering Document to
                    the closing date of the latest available income statement
                    read by such accountants there were any decreases, as
                    compared with the corresponding period of the previous year
                    and with the period of corresponding length ended the date
                    of the latest income statement incorporated by reference in
                    the Offering Document, in consolidated net sales, net
                    operating income or in the total or per share amounts of
                    consolidated income before extraordinary items or net income
                    or in the ratio of earnings to fixed charges

             except in all cases set forth in clauses (B) and (C) above for
             changes, increases or decreases which the Offering Document
             disclose have occurred or may occur or which are described in such
             letter; and

                    (iv)   they have compared specified dollar amounts (or
             percentages derived from such dollar amounts) and other financial
             information contained in the Offering Document and the Exchange Act
             Reports (in each case to the extent that such dollar amounts,
             percentages and other financial information are derived from the
             general accounting records of the Company and its subsidiaries
             subject to the internal controls of the Company's accounting system
             or are derived directly from such records by analysis or
             computation) with the results obtained from inquiries, a reading of
             such general accounting records and other procedures specified in
             such letter and have found such dollar amounts, percentages and
             other financial information to be in agreement with such results,
             except as otherwise specified in such letter.

             (b) Subsequent to the execution and delivery of this Agreement,
     there shall not have occurred (i) any change, or any development or event
     involving a prospective change, in the condition (financial or other),
     business, properties or results of operations of the Company and its
     subsidiaries taken as one enterprise which, in the judgment of a majority
     in interest of the Purchasers including CSFBC, is material and adverse and
     makes it impractical or inadvisable to proceed with completion of the
     offering or the sale of and payment for the Offered Securities; (ii) any
     downgrading in the rating of any debt securities of the Company by any
     "nationally recognized statistical rating organization" (as defined for
     purposes of Rule 436(g) under the Securities Act), or any public

                                       10
<Page>

     announcement that any such organization has under surveillance or review
     its rating of any debt securities of the Company (other than an
     announcement with positive implications of a possible upgrading, and no
     implication of a possible downgrading, of such rating) or any announcement
     that the Company has been placed on negative outlook; (iii) any change in
     U.S. or international financial, political or economic conditions or
     currency exchange rates or exchange controls as would, in the judgment of a
     majority in interest of the Purchasers including CSFBC, be likely to
     prejudice materially the success of the proposed issue, sale or
     distribution of the Offered Securities, whether in the primary market or in
     respect of dealings in the secondary market, (iv) any material suspension
     or material limitation of trading in securities generally on the New York
     Stock Exchange, or any setting of minimum prices for trading on such
     exchange, or any suspension of trading of any securities of the Company on
     any exchange or in the over-the-counter market; (v) any banking moratorium
     declared by U.S. Federal or New York authorities; (vi) any major disruption
     of settlements of securities or clearance services in the United States or
     (vii) any attack on, outbreak or escalation of hostilities or act of
     terrorism involving the United States, any declaration of war by Congress
     or any other national or international calamity or emergency if, in the
     judgment of a majority in interest of the Purchasers including CSFBC, the
     effect of any such attack, outbreak, escalation, act, declaration, calamity
     or emergency makes it impractical or inadvisable to proceed with completion
     of the offering or sale of and payment for the Offered Securities.

             (c) The Purchasers shall have received an opinion, subject to such
     qualifications as may be acceptable to Purchasers in their sole discretion,
     dated such Closing Date, of Schreck Brignone Godfrey, Nevada counsel for
     the Company, that:

                    (i)    The Company has been duly incorporated and is
             existing as a corporation in good standing under the laws of the
             State of Nevada, with corporate power and authority to own its
             properties and conduct its business as described in the Offering
             Circular;

                    (ii)   The Indenture has been duly authorized, executed and
             delivered by the Company; the Offered Securities delivered on such
             Closing Date have been duly authorized, executed, and delivered by
             the Company;

                    (iii)  The Company has the corporate power and authority to
             authorize, issue and sell the Offered Securities as contemplated by
             this Agreement;

                    (iv)   This Agreement and the Registration Rights Agreement
             have each been duly authorized, executed and delivered by the
             Company;

                    (v)    The shares of Common Stock of the Company initially
             issuable upon conversion of the Offered Securities delivered on
             such Closing Date have been duly authorized and reserved for
             issuance upon such conversion and, when issued upon such conversion
             in accordance with the provisions of the Indenture, will be validly
             issued, fully paid and nonassessable and conform to the description
             thereof contained in the Offering Circular; and the stockholders of
             the Company have no preemptive rights under any law or the
             Company's charter or by-laws with respect to the Offered Securities
             or the Common Stock;

                    (vi)   The execution, delivery and performance of the
             Indenture, the Offered Securities, this Agreement and the
             Registration Rights Agreement (including the issuance and sale of
             the Offered Securities pursuant to this Agreement) and compliance
             with the terms and provisions thereof will not result in a breach
             or violation of, or constitute a default under, any Nevada statute,
             any rule, regulation or order of any Nevada governmental agency or
             body or any court having jurisdiction over the Company or any of
             its properties, or the charter or by-laws of the Company;

                                       11
<Page>

                    (vii)  The descriptions in the Offering Circular under
             "Description of Capital Stock" insofar as such descriptions
             constitute summaries of Nevada statutes, legal and governmental
             proceedings in Nevada and the charter and bylaws of the Company and
             other specifically referenced corporate records and documents are
             accurate in all material respects and fairly present the
             information required to be set forth therein.

             (d) The Purchasers shall have received an opinion, dated such
     Closing Date, of Cooley Godward LLP, counsel for the Company, that:

                    (i)    The Company is duly qualified to do business as a
             foreign corporation in good standing in all other jurisdictions in
             which its ownership or lease of property or the conduct of its
             business requires such qualification except where the failure to be
             so qualified would not result in a Material Adverse Effect;

                    (ii)   The Offered Securities delivered on such Closing Date
             have been duly authenticated and validly issued by the Company and
             conform in all material respects to the description thereof
             contained in the Offering Circular under the caption "Description
             of the Notes;" and the Indenture and the Offered Securities
             delivered on such Closing Date constitute valid and legally binding
             obligations of the Company enforceable against the Company in
             accordance with their terms, subject to bankruptcy, insolvency,
             fraudulent transfer, reorganization, moratorium and similar laws of
             general applicability relating to or affecting creditors' rights
             and to general equity principles;

                    (iii)  The Registration Rights Agreement constitutes a valid
             and legally binding obligation of the Company enforceable in
             accordance with its terms (subject to customary exceptions);

                    (iv)   The Offered Securities delivered on such Closing Date
             are convertible into Common Stock of the Company in accordance with
             the terms of the Indenture;

                    (v)    The Company is not and, after giving effect to the
             offering and sale of the Offered Securities and the application of
             the proceeds thereof as described in the Prospectus, will not be an
             "investment company" as defined in the Investment Company Act;

                    (vi)   No consent, approval, authorization or order of, or
             filing with, any governmental agency or body or any court is
             required for the issuance or sale of the Offered Securities by the
             Company or the consummation by the Company of the transactions
             contemplated by this Agreement, the Indenture, the Registration
             Rights Agreement, except such as may be required (A) under state
             securities laws and (B) in connection with the filing and
             effectiveness of the Shelf Registration Statement as contemplated
             by the Registration Rights Agreement;

                    (vii)  To such counsel's knowledge, except as disclosed in
             the Offering Document, there are no pending actions, suits or
             proceedings against or affecting the Company, any of its
             subsidiaries or any of their respective properties that, if
             determined adversely to the Company or any of its subsidiaries,
             would individually or in the aggregate have a Material Adverse
             Effect; and to such counsel's knowledge, no such actions, suits or
             proceedings are overtly threatened;

                    (viii) The execution, delivery and performance by the
             Company of the Indenture, this Agreement and the Registration
             Rights Agreement, the issuance and sale of the Offered Securities
             pursuant to this Agreement and compliance by the Company with the
             terms and

                                       12
<Page>

             provisions thereof will not result in a breach or violation of any
             of the terms and provisions of, or constitute a default under, (A)
             any statute, any rule, regulation or order of any governmental
             agency or body or any court having jurisdiction over the Company or
             any of its properties, or (B) any Reviewed Agreement. "REVIEWED
             AGREEMENTS" means those agreements or instruments to which the
             Company or Cymer Japan is a party or by which the Company or Cymer
             Japan is bound or to which any of the properties of the Company or
             Cymer Japan is subject, and which agreement or instrument is
             included as an exhibit filed pursuant to Item 601(b)(4) or Item
             601(b)(10) of Regulation S-K to any Exchange Act Report or which,
             as certified by the Company to such counsel, would be required to
             be filed as such an exhibit if the Company were filing an Annual
             Report on Form 10-K on the date hereof;

                    (ix)   The stockholders of the Company have no preemptive
             rights under any Reviewed Agreement with respect to the Offered
             Securities or the Common Stock.

                    (x)    The descriptions in the Offering Circular (a) under
             the captions "Description of Credit Facility," "Description of the
             Notes," "Certain United States Federal Income Tax Considerations,"
             and "Transfer Restrictions," and (b) in the second, fourth, fifth,
             seventh, eighth and ninth paragraphs under the caption "Plan of
             Distribution," in each case insofar as such descriptions purport to
             describe the provisions of statutes and contracts referred to
             therein, fairly present in all material respects such statutes and
             contracts to the same extent as would be required if the Offering
             Circular were a prospectus in a Registration Statement of the
             Company on Form S-3 under the Securities Act; and

                    (xi)   Assuming the accuracy of the representations and
             warranties of the Company set forth in Sections 2(r), (s), (v) and
             (w) of this Agreement, the accuracy of the representations and
             warranties of the Purchasers set forth in Section 4 of this
             Agreement and the compliance by the Purchasers and the Company with
             the covenants set forth in Section 4 and Section 5(h),
             respectively, of this Agreement, (i) the offer, sale and delivery
             of the Offered Securities by the Company to the Purchasers pursuant
             to this Agreement and (ii) the initial resale of the Offered
             Securities by the Purchasers in the manner contemplated by this
             Agreement do not require registration under the Securities Act or
             the qualification of an indenture in respect thereof under the
             Trust Indenture Act.

     Such counsel shall also state that, during the course of preparing the
Offering Circular, such counsel has participated in conferences with officers
and other representatives of the Company, the Company's independent auditors,
and the Purchasers and their counsel, at which the contents of the Offering
Circular were discussed. Such counsel did not participate in the preparation of
the Exchange Act Reports but, during the course of the preparation of the
Offering Circular, such counsel reviewed the Exchange Act Reports and
participated in conferences with officers and other representatives of the
Company, the Company's independent auditors and the Purchaser and its counsel,
at which the contents of the Exchange Act Reports were discussed. Certain of the
information contained in the Exchange Act Reports is as of the dates set forth
therein or as to periods with respect to which such Exchange Act Reports were
filed. While such counsel has not independently verified and is not passing upon
the accuracy, completeness or fairness of the statements made in the Offering
Circular or any Exchange Act Report (in each case, except as otherwise expressly
set forth in such counsel's opinion), no facts have come to such counsel's
attention which lead such counsel to believe that the Offering Circular, or any
amendment or supplement thereto, or any Exchange Act Report (as updated or
superseded by such Exchange Act Reports or the Offering Circular) as of the date
hereof and as of such Closing Date, contained any untrue statement of a material
fact or omitted to state any material fact necessary in order to make the
statements therein, in light of the circumstances under which they were made,
not misleading; it being understood that such counsel need express no opinion as
to the financial

                                       13
<Page>

statements and schedules and related notes or other financial data contained in
the Offering Circular and the Exchange Act Reports.

             (e) The Purchasers shall have received an opinion of Miyake &
     Yamazaki, dated such Closing Date, regarding the Subsidiary, that:

                    (i)    Cymer Japan has been duly incorporated and is validly
             existing as a corporation under the laws of Japan, with the
             corporate power and authority to own or lease property and to
             conduct its business as described in the Offering Circular, and is
             not delinquent, as of the date hereof, in any national or local tax
             levied or assessed on its revenue and asset;

                    (ii)   All of the issued shares of capital stock of Cymer
             Japan have been duly and validly authorized and issued, are fully
             paid and non-assessable, and are owned directly by the Company,
             free and clear of any registered or recorded lien, encumbrance,
             equity or claim;

                    (iii)  The execution and delivery by the Company of, and the
             performance by the Company of its obligations under, this Purchase
             Agreement will not contravene any provision of applicable law or
             the Articles of Incorporation of Cymer Japan or, to such counsel's
             knowledge, any agreement or other instrument binding upon Cymer
             Japan that is material to the Company and its subsidiaries, taken
             as a whole, or, to such counsel's knowledge, any judgment, order or
             decree of any governmental body, agency or court having
             jurisdiction over Cymer Japan; and

                    (iv)   Such counsel knows of no legal or governmental
             proceedings pending or threatened to which Cymer Japan is a party
             or to which any of the properties of Cymer Japan is subject; except
             that such counsel has been informed by Cymer Japan that one of the
             Japanese contract manufacturers for the Company has been given a
             warning letter by Komatsu Limited, a Japanese corporation, that the
             laser products it manufactures and supplies to the Company could
             infringe Komatsu's multiple Japanese patents, that Komatsu might
             proceed to a legal action based on such patents against the Company
             as well as Cymer Japan, and that the parties are presently
             negotiating for a possible settlement, but nothing was agreed upon.

             (f) The Purchasers shall have received a patent opinion of in-house
     counsel for the Company dated such Closing Date, to the effect that such
     counsel has examined the patent files of the Company and has read the
     particular portions of the Offering Circular referring to patents and other
     intellectual property rights of the Company and that:

                    (i)    The statements in the Offering Circular under the
             heading "Risk Factors- Our ability to compete could be jeopardized
             if we are unable to protect our intellectual property rights. These
             types of claims could seriously harm our business or require us to
             incur significant costs" contain accurate descriptions of the
             number and expiration dates of the Company's issued and allowed
             patents and of the number of the Company's currently pending U.S.
             and foreign patent applications, including those U.S. patent
             applications which have been allowed;

                    (ii)   Attached as Exhibit A to such counsel's opinion is a
             schedule containing an accurate list of all issued and allowed
             United States patents of the Company and of all currently pending
             United States patent applications filed by the Company. The
             accuracy of the list is subject to any qualifications noted in such
             Exhibit A. Such counsel has no actual

                                       14
<Page>

             knowledge of any fact or circumstance which would render any of the
             issued United States patents listed on such Exhibit A invalid;

                    (iii)  Attached as Exhibit B to such counsel's opinion is a
             schedule containing an accurate list of all currently pending
             foreign patent applications which are being prosecuted on behalf of
             the Company. The accuracy of the list is subject to any
             qualifications noted in such Exhibit B. Such counsel has no actual
             knowledge of any fact or circumstance which would render any of the
             issued foreign patents listed on such Exhibit B invalid. The
             Company's foreign patent applications listed in such Exhibit B
             properly claimed priority based on the corresponding United States
             patent applications unless noted otherwise;

                    (iv)   The Company's pending United States patent
             applications listed in Exhibit A to such counsel's opinion have
             been properly filed and, to the best of such counsel's knowledge
             and subject to the qualifications noted in such Exhibit A, properly
             prepared and diligently pursued on behalf of the Company, and
             unless otherwise noted in such Exhibit A, the inventions described
             in the patents and applications listed on such Exhibits A and B
             have been assigned to the Company. Such counsel has no actual
             knowledge of any fact or circumstance which would render any
             pending foreign patent application listed in Exhibit B to such
             counsel's opinion defective. Except for claims of Komatsu Patents
             described in the Offering Circular under "Risk Factors - In the
             future, we may be subject to patent litigation to enforce patents
             issued to us and defend ourselves against claimed infringement by
             our competitors or any other third party" and "- If Seiko
             discontinues producing our laser in Japan due to patent
             infringement claims made by Komatsu, our ability to meet the demand
             for our product in Japan could be materially adversely affected,"
             such counsel has no actual knowledge of any other entity or
             individual having asserted any ownership right or claim in any of
             the patents and applications list on such Exhibits A and B, other
             than the Company;

                    (v)    Such counsel has no actual knowledge of any fact or
             circumstance which would give any other entity or individual any
             right or claim in any of the issued patents or applications
             described in Exhibits A and B to such counsel's opinion unless
             otherwise noted therein; and

                    (vi)   Other than governmental examination proceedings
             related to the prosecution of the patents and applications listed
             on such Exhibits A and B, such counsel has no actual knowledge of
             any pending or threatened judicial or governmental proceedings
             relating to any of such patents or applications to which the
             Company is a party, or of which any property of the Company is
             subject, and except for Komatsu's Patent claims, such counsel is
             not aware of any pending or threatened action, suit or claim by
             others that the Company is infringing or otherwise violating any
             patent rights of others.

             (g) The Purchasers shall have received from Wilson Sonsini Goodrich
     & Rosati Professional Corporation, counsel for the Purchasers, such opinion
     or opinions, dated such Closing Date, with respect to the incorporation of
     the Company, the validity of the Offered Securities, the Offering Circular,
     the exemption from registration for the offer and sale of the Offered
     Securities by the Company to the Purchasers and the resales by the
     Purchasers as contemplated hereby and other related matters as CSFBC may
     require, and the Company shall have furnished to such counsel such
     documents as they request for the purpose of enabling them to pass upon
     such matters. In rendering such opinion, Wilson Sonsini Goodrich & Rosati
     Professional Corporation may rely as to the incorporation of the Company
     and all other matters governed by Nevada law upon the opinion of Schreck
     Brignone Godfrey referred to above.

             (h) The Purchasers shall have received a certificate, dated such
     Closing Date, of the Chief Executive Officer, President or any Executive or
     Senior Vice President and a principal financial or

                                       15
<Page>

     accounting officer of the Company in which such officers, to the best of
     their knowledge after reasonable investigation, shall state that the
     representations and warranties of the Company in this Agreement are true
     and correct, that the Company has complied with all agreements and
     satisfied all conditions on its part to be performed or satisfied hereunder
     at or prior to such Closing Date, and that, subsequent to the date of the
     most recent financial statements in the Offering Document there has been no
     material adverse change, nor any development or event involving a
     prospective material adverse change, in the condition (financial or other),
     business, properties or results of operations of the Company and its
     subsidiaries taken as a whole except as set forth in or contemplated by the
     Offering Document or as described in such certificate.

             (i) The Purchasers shall have received a letter, dated such Closing
     Date, of KPMG LLP which meets the requirements of subsection (a) of this
     Section, except that the specified date referred to in such subsection will
     be a date not more than three days prior to such Closing Date for the
     purposes of this subsection.

             (j) The Common Stock of the Company shall be listed and admitted to
     trading on the Nasdaq National Market.

             (k) On or prior to the date of this Agreement, the Purchasers shall
     have received lock-up letters from each of the directors and executive
     officers of the Company.

     On or before each of the First Closing Date and each Optional Closing Date,
the Purchasers and counsel for the Purchasers shall have received such
information, documents and opinions as they may reasonably require for the
purposes of enabling them to pass upon the issuance and sale of the Offered
Securities as contemplated herein, or in order to evidence the accuracy of any
of the representations and warranties, or the satisfaction of any of the
conditions or agreements, herein contained. The Company will furnish the
Purchasers with such conformed copies of such opinions, certificates, letters
and documents as the Purchasers reasonably request. CSFBC may in its sole
discretion waive on behalf of the Purchasers compliance with any conditions to
the obligations of the Purchasers hereunder, whether in respect of an Optional
Closing Date or otherwise.

     7.  INDEMNIFICATION AND CONTRIBUTION. (a) The Company will indemnify and
hold harmless each Purchaser, its partners, directors and officers and each
person, if any, who controls such Purchaser within the meaning of Section 15 of
the Securities Act, against any losses, claims, damages or liabilities, joint or
several, to which such Purchaser may become subject, under the Securities Act or
the Exchange Act or otherwise, insofar as such losses, claims, damages or
liabilities (or actions in respect thereof) arise out of or are based upon any
untrue statement or alleged untrue statement of any material fact contained in
the Offering Document, or any amendment or supplement thereto, or arise out of
or are based upon the omission or alleged omission to state therein a material
fact necessary in order to make the statements therein, in the light of the
circumstances under which they were made, not misleading, including any losses,
claims, damages or liabilities arising out of or based upon the Company's
failure to perform its obligations under Section 5(a) of this Agreement, and
will reimburse each Purchaser for any legal or other expenses reasonably
incurred by such Purchaser in connection with investigating or defending any
such loss, claim, damage, liability or action as such expenses are incurred;
provided, however, that the Company will not be liable in any such case to the
extent that any such loss, claim, damage or liability arises out of or is based
upon an untrue statement or alleged untrue statement in or omission or alleged
omission from any of such documents in reliance upon and in conformity with
written information furnished to the Company by any Purchaser through CSFBC
specifically for use therein, it being understood and agreed that the only such
information consists of the information described as such in subsection (b)
below.

             (b) Each Purchaser will severally and not jointly indemnify and
hold harmless the Company, its directors and officers and each person, if any,
who controls the Company within the meaning of Section 15 of the Securities Act,
against any losses, claims, damages or liabilities, joint or several, to which
the Company may become subject, under the Securities Act or the Exchange Act or
otherwise, insofar as such

                                       16
<Page>

losses, claims, damages or liabilities (or actions in respect thereof) arise out
of or are based upon any untrue statement or alleged untrue statement of any
material fact contained in the Offering Document, or any amendment or supplement
thereto, or arise out of or are based upon the omission or the alleged omission
to state therein a material fact necessary in order to make the statements
therein, in the light of the circumstances under which they were made, not
misleading, in each case to the extent, but only to the extent, that such untrue
statement or alleged untrue statement or omission or alleged omission was made
in reliance upon and in conformity with written information furnished to the
Company by such Purchaser through CSFBC specifically for use therein, and will
reimburse the Company for any legal or other expenses reasonably incurred by the
Company in connection with investigating or defending any such loss, claim,
damage, liability or action as such expenses are incurred, it being understood
and agreed that the only such information furnished by any Purchaser consists of
the following information in the Offering Document: under the caption "Plan of
Distribution:" the first sentence of the third paragraph, the sixth paragraph,
the third sentence of the tenth paragraph and the eleventh paragraph; provided,
however, that the Purchasers shall not be liable for any losses, claims, damages
or liabilities arising out of or based upon the Company's failure to perform its
obligations under Section 5(a) of this Agreement.

             (c) Promptly after receipt by an indemnified party under this
Section of notice of the commencement of any action, such indemnified party
will, if a claim in respect thereof is to be made against the indemnifying party
under subsection (a) or (b) above, notify the indemnifying party of the
commencement thereof; but the omission so to notify the indemnifying party will
not relieve it from any liability which it may have to any indemnified party
otherwise than under subsection (a) or (b) above, unless and to the extent the
indemnifying party did not otherwise learn of such claim and such omission
results in the forfeiture by the indemnifying party of substantial rights or
defenses or the indemnifying party is otherwise materially prejudiced by the
omission. In case any such action is brought against any indemnified party and
it notifies the indemnifying party of the commencement thereof, the indemnifying
party will be entitled to participate therein and, to the extent that it may
wish, jointly with any other indemnifying party similarly notified, to assume
the defense thereof, with counsel reasonably satisfactory to such indemnified
party (who shall not, except with the consent of the indemnified party, be
counsel to the indemnifying party), and after notice from the indemnifying party
to such indemnified party of its election so to assume the defense thereof, the
indemnifying party will not be liable to such indemnified party under this
Section for any legal or other expenses subsequently incurred by such
indemnified party in connection with the defense thereof other than reasonable
costs of investigation. No indemnifying party shall, without the prior written
consent of the indemnified party (which consent shall not be unreasonably
delayed or withheld), effect any settlement of any pending or threatened action
in respect of which any indemnified party is or could have been a party and
indemnity could have been sought hereunder by such indemnified party unless such
settlement includes an unconditional release of such indemnified party from all
liability on any claims that are the subject matter of such action and does not
include a statement as to or an admission of fault, culpability or failure to
act by or on behalf of any indemnified party. In no event will any indemnifying
party be liable for fees and disbursements of more than one counsel, plus the
fees and disbursements of any local counsel, for all indemnified parties in
connection with any one action or separate but similar or related actions in the
same jurisdiction arising out of the same general obligations or circumstances,
unless an indemnified party reasonably determines that representation of such
indemnifying party and the indemnified party by the same counsel would present a
conflict of interest. No indemnified party shall, without the prior written
consent of the indemnifying party, which consent shall not be unreasonably
withheld or delayed, effect any settlement or compromise, or consent to the
entry of any judgment with respect to any pending or threatened action in
respect of which any indemnifying party is or could have been a party or
indemnity could have been sought hereunder from such indemnifying party.

             (d) If the indemnification provided for in this Section is
unavailable or insufficient to hold harmless an indemnified party under
subsection (a) or (b) above, then each indemnifying party shall contribute to
the amount paid or payable by such indemnified party as a result of the losses,
claims, damages or liabilities referred to in subsection (a) or (b) above (i) in
such proportion as is appropriate to reflect the relative benefits received by
the Company on the one hand and the Purchasers on the other from the offering of
the Offered Securities or (ii) if the allocation provided by clause (i) above is
not permitted by applicable law, in such

                                       17
<Page>

proportion as is appropriate to reflect not only the relative benefits referred
to in clause (i) above but also the relative fault of the Company on the one
hand and the Purchasers on the other in connection with the statements or
omissions which resulted in such losses, claims, damages or liabilities as well
as any other relevant equitable considerations. The relative benefits received
by the Company on the one hand and the Purchasers on the other shall be deemed
to be in the same proportion as the total net proceeds from the offering (before
deducting expenses) received by the Company bear to the total discounts and
commissions received by the Purchasers from the Company under this Agreement.
The relative fault shall be determined by reference to, among other things,
whether the untrue or alleged untrue statement of a material fact or the
omission or alleged omission to state a material fact relates to information
supplied by the Company or the Purchasers and the parties' relative intent,
knowledge, access to information and opportunity to correct or prevent such
untrue statement or omission. The amount paid by an indemnified party as a
result of the losses, claims, damages or liabilities referred to in the first
sentence of this subsection (d) shall be deemed to include any legal or other
expenses reasonably incurred by such indemnified party in connection with
investigating or defending any action or claim which is the subject of this
subsection (d). Notwithstanding the provisions of this subsection (d), no
Purchaser shall be required to contribute any amount in excess of the amount by
which the total price at which the Offered Securities purchased by it were
resold exceeds the amount of any damages which such Purchaser has otherwise been
required to pay by reason of such untrue or alleged untrue statement or omission
or alleged omission. The Purchasers' obligations under this subsection (d) to
contribute are several in proportion to their respective purchase obligations
and not joint.

             (e) The obligations of the Company under this Section shall be in
addition to any liability which the Company may otherwise have and shall extend,
upon the same terms and conditions, to each person, if any, who controls any
Purchaser within the meaning of the Securities Act or the Exchange Act; and the
obligations of the Purchasers under this Section shall be in addition to any
liability which the respective Purchasers may otherwise have and shall extend,
upon the same terms and conditions, to each person, if any, who controls the
Company within the meaning of the Securities Act or the Exchange Act.

     8.  DEFAULT OF PURCHASERS. If any Purchaser or Purchasers default in their
obligations to purchase Offered Securities hereunder on either the First Closing
Date or any Optional Closing Date, and the aggregate principal amount of Offered
Securities that such defaulting Purchaser or Purchasers agreed but failed to
purchase does not exceed 10% of the total principal amount of Offered Securities
that the Purchasers are obligated to purchase on such Closing Date, CSFBC may
make arrangements satisfactory to the Company for the purchase of such Offered
Securities by other persons, including any of the Purchasers, but if no such
arrangements are made by such Closing Date, the non-defaulting Purchasers shall
be obligated severally, in proportion to their respective commitments hereunder,
to purchase the Offered Securities that such defaulting Purchasers agreed but
failed to purchase on such Closing Date. If any Purchaser or Purchasers so
default and the aggregate principal amount of Offered Securities with respect to
which such default or defaults occur exceeds 10% of the total principal amount
of Offered Securities that the Purchasers are obligated to purchase on such
Closing Date and arrangements satisfactory to CSFBC and the Company for the
purchase of such Offered Securities by other persons are not made within 36
hours after such default, this Agreement will terminate without liability on the
part of any non-defaulting Purchaser or the Company, except as provided in
Section 9 (provided that if such default occurs with respect to Optional
Securities after the First Closing Date, this Agreement shall not terminate as
to the Firm Securities or any Optional Securities purchased prior to such
termination). As used in this Agreement, the term "Purchaser" includes any
person substituted for a Purchaser under this Section. Nothing herein will
relieve a defaulting Purchaser from liability for its default.

     9.  SURVIVAL OF CERTAIN REPRESENTATIONS AND OBLIGATIONS. The respective
indemnities, agreements, representations, warranties and other statements of the
Company or its officers and of the several Purchasers set forth in or made
pursuant to this Agreement will remain in full force and effect, regardless of
any investigation, or statement as to the results thereof, made by or on behalf
of any Purchaser, the Company or any of their respective representatives,
officers or directors or any controlling person, and will survive delivery of
and payment for the Offered Securities. If this Agreement is terminated pursuant
to Section 8 or if for any reason the purchase of the Offered Securities by the
Purchasers is not consummated, the Company shall remain

                                       18
<Page>

responsible for the expenses to be paid or reimbursed by it pursuant to
Section 5 and the respective obligations of the Company and the Purchasers
pursuant to Section 7 shall remain in effect and if any Offered Securities have
been purchased hereunder the representations and warranties in Section 2 and all
obligations under Section 5 shall also remain in effect. If the purchase of the
Offered Securities by the Purchasers is not consummated for any reason other
than solely because of the termination of this Agreement pursuant to Section 8
or the occurrence of any event specified in Section 6(b)(iii) through
Section 6(b)(vii), the Company will reimburse the Purchasers for all
out-of-pocket expenses (including fees and disbursements of counsel) reasonably
incurred by them in connection with the offering of the Offered Securities.

     10. NOTICES. All communications hereunder will be in writing and, if sent
to the Purchasers will be mailed, delivered or telegraphed and confirmed to the
Purchasers c/o Credit Suisse First Boston Corporation, Eleven Madison Avenue,
New York, N.Y. 10010-3629, Attention: Transactions Advisory Group, or, if sent
to the Company, will be mailed, delivered or telegraphed and confirmed to it at
16750 Via Del Campo Court, San Diego, CA 92127, Attention: Chief Financial
Officer; provided, however, that any notice to a Purchaser pursuant to Section 7
will be mailed, delivered or telegraphed and confirmed to such Purchaser.

     11. SUCCESSORS. This Agreement will inure to the benefit of and be binding
upon the parties hereto and their respective successors and the controlling
persons referred to in Section 7, and no other person will have any right or
obligation hereunder, except that holders of Offered Securities shall be
entitled to enforce the agreements for their benefit contained in the second and
third sentences of Section 5(b) hereof against the Company as if such holders
were parties thereto.

     12. REPRESENTATION OF PURCHASERS. CSFBC will act for the several Purchasers
in connection with this purchase, and any action under this Agreement taken by
CSFBC will be binding upon all Purchasers.

     13. COUNTERPARTS. This Agreement may be executed in any number of
counterparts, each of which shall be deemed to be an original, but all such
counterparts shall together constitute one and the same Agreement.

     14. APPLICABLE LAW. THIS AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED IN
ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK WITHOUT REGARD TO PRINCIPLES
OF CONFLICTS OF LAWS.

     15. JURISDICTION. The Company hereby submits to the non-exclusive
jurisdiction of the Federal and state courts in the Borough of Manhattan in The
City of New York in any suit or proceeding arising out of or relating to this
Agreement or the transactions contemplated hereby.

            [The remainder of this page is intentionally left blank]

                                       19
<Page>

     If the foregoing is in accordance with the Purchasers' understanding of our
agreement, kindly sign and return to us one of the counterparts hereof,
whereupon it will become a binding agreement between the Company and the several
Purchasers in accordance with its terms.

                                          Very truly yours,

                                          CYMER, INC.


                                          By:     /s/ NANCY J. BAKER
                                                  ------------------------------

                                          Title:  SR. V.P. & CFO
                                                  -------------------------


The foregoing Purchase Agreement
  is hereby confirmed and accepted
  as of the date first above written.

CREDIT SUISSE FIRST BOSTON CORPORATION
MERRILL LYNCH PIERCE FENNER & SMITH
         INCORPORATED

BY:  CREDIT SUISSE FIRST BOSTON CORPORATION


By:     /s/ RICHARD CHAR
        -----------------------------

Title:  MANAGING DIRECTOR
        -----------------------------

<Page>

                                   SCHEDULE A

<Table>
<Caption>
PURCHASER                                                       PRINCIPAL AMOUNT OF FIRM SECURITIES
---------                                                       -----------------------------------
<S>                                                                    <C>
Credit Suisse First Boston Corporation                                 $ 160,000,000
Merrill Lynch Pierce Fenner & Smith Incorporated                       $  40,000,000

                                                                       -------------
Total                                                                  $ 200,000,000
                                                                       =============
</Table>

<Page>

                                   SCHEDULE B
                (List of documents included in Offering Circular)

1.   Annual Report on Form 10-K for the Fiscal Year ended December 31, 2000.

2.   Quarterly Report on Form 10-Q for the Fiscal Quarter ended March 31, 2001.

3.   Quarterly Report on Form 10-Q for the Fiscal Quarter ended June 30, 2001.

4.   Quarterly Report on Form 10-Q for the Fiscal Quarter ended September 30,
     2001.

5.   Registration Statement on Form 8-A filed February 20, 1998.

6.   Registration Statement on Form 8-A filed September 6, 1996.

7.   Registration Statement on Form 8-A/A filed on October 24, 1997.