Document:

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                                                                    EXHIBIT 10.6

                      FOURTH AMENDMENT TO CREDIT AGREEMENT

                This Amendment, dated as of February 26, 2003, is made by and
among ENTEGRIS, INC., a Minnesota corporation (the "Borrower"), each of the
banks appearing on the signature pages hereof, together with such other banks as
may from time to time become a party to the Credit Agreement (defined below)
pursuant to the terms and conditions of Article VIII of the Credit Agreement
(herein collectively called the "Banks" and individually each called a "Bank"),
and WELLS FARGO BANK, NATIONAL ASSOCIATION, a national banking association,
assignee of Wells Fargo Bank Minnesota, National Association, formerly known as
Norwest Bank Minnesota, National Association, in its separate capacity as
administrative agent for itself and all other Banks (in such capacity, the
"Agent").

                                    Recitals

                A.      The Borrower, the Banks and the Agent have entered into
a Credit Agreement dated as of November 30, 1999, as amended by a First
Amendment to Credit Agreement dated as of October 17, 2000, a Second Amendment
to Credit Agreement dated as of March 1, 2002 and a Consent and Amendment
Agreement dated as of February 7, 2003 (as so amended, the "Credit Agreement").

                B.      The Borrower has requested that the Banks and the Agent,
among other things (i) increase the Revolving Commitment Amount, (ii) extend the
maturity of the credit facility provided under the Credit Agreement, and (iii)
amend certain other provisions of the Credit Agreement.

                C.      The Banks and the Agent are willing to grant the
Borrower's requests subject to the terms and conditions set forth below.

                ACCORDINGLY, in consideration of the premises and for other good
and valuable consideration, the Borrower, the Banks and the Agent agree as
follows:

                1.      All capitalized terms used in this Amendment and not
otherwise specifically defined in this Amendment shall have the meanings given
such terms in the Credit Agreement.

                2.      Section 1.1 of the Credit Agreement is hereby amended by
amending or adding, as applicable, the following definitions to read in their
entirety as follows:

                '"Acquisition' means the acquisition by the Borrower and
        Entegris Cayman of certain assets of Asyst pursuant to the Acquisition
        Documents."

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                '"Acquisition Documents' means (a) the Asset Purchase Agreement
        dated as of February 11, 2003 among Asyst, the Borrower and Entegris
        Cayman, (b) the Patent Assignment and Cross-License and Trademark
        License Agreement dated as of February 11, 2003 between Asyst and the
        Borrower, (c) the Transition Services Agreement dated as of February 11,
        2003 among Asyst, the Borrower and Entegris Cayman, (d) the Escrow
        Agreement dated as of February 11, 2003 among Asyst, the Borrower,
        Entegris Cayman and Wells Fargo Bank, National Association in its
        capacity as escrow agent thereunder, and (e) separate Employment
        Agreements of John Burns and Gary Gallagher dated as of February 11,
        2003, including, in each case, all exhibits, schedules and other
        attachments thereto."

                '"Asyst' means Asyst Technologies, Inc., a California
        corporation."

                '"Base Rate' means the Prime Rate."

                '"Capital Expenditure' means any expenditure of money for the
        purchase or construction of fixed assets or for the purchase or
        construction of any other assets, or for improvements or additions
        thereto, which are capitalized on the Borrower's balance sheet, whether
        payable currently or in the future, excluding, however, any expenditure
        of cash in connection with an acquisition of stock or assets of another
        Person permitted under Section 6.4 of this Agreement."

                '"Cash Taxes' means, with respect to the applicable Covenant
        Computation Period, the Tax Expense for such Covenant Computation
        Period, plus (minus) any increase (decrease) in deferred tax assets
        during such Covenant Computation Period and minus (plus) any increase
        (decrease) in deferred tax liabilities during such Covenant Computation
        Period."

                '"Consent' means the Consent and Amendment Agreement dated as of
        February 7, 2003 among the Borrower, the Agent and the Banks."

                '"Domestic Cash' means the cash and cash equivalents owned by
        the Borrower and/or the Borrower's Domestic Subsidiaries."

                '"Domestic Subsidiary' means a Subsidiary organized under the
        laws of one of the States of the United States."

                '"Domestic Tangible Net Worth' means the sum (without
        duplication) of the Tangible Net Worth of (i) the Borrower, (ii) the
        Borrower's Domestic Subsidiaries, and (iii) the Guarantors, determined
        on a consolidated basis in accordance with GAAP; provided, however,
        that, for purposes of calculating Domestic Tangible Net Worth (a)
        Domestic Tangible Net Worth shall not include the Tangible Net Worth (or
        any portion thereof) of or attributable to a Foreign Subsidiary which is
        not also a Guarantor, (b) neither an investment of the Borrower, any
        Domestic Subsidiary or any

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        Guarantor in or to any Foreign Subsidiary nor any receivables due to the
        Borrower, any Domestic Subsidiary or any Guarantor from any Foreign
        Subsidiary shall be included in any determination of Domestic Tangible
        Net Worth, (c) the Tangible Net Worth of any Foreign Subsidiary which is
        also a Guarantor shall be limited to an amount agreed to by the Agent,
        the Banks and the Borrower upon such Foreign Subsidiary's becoming a
        Guarantor and, if not so agreed, such amount shall at all times be zero,
        and (d) the Specified Foreign Trade Receivables shall be included as
        tangible assets of the Borrower)."

                '"Entegris Cayman' means Entegris Cayman Ltd., a Cayman Island
        corporation and wholly-owned Subsidiary of the Borrower."

                '"Entegris Custom Products' means Entegris Custom Products,
        Inc., a Minnesota corporation."

                '"Financial Covenants' means the covenants contained in Sections
        5.8 through 5.13."

                "'Fixed Charge Coverage Ratio' means, with respect to the
        applicable Covenant Computation Period, the ratio of (a) EBITDA, plus
        Rent Expense, less Capital Expenditures, less Cash Taxes (whether or not
        included in the calculation of EBITDA), less Permitted Restricted
        Payments, to (b) Interest Expense, plus Rent Expense, plus current
        maturities of Long Term Debt."

                '"Foreign Subsidiary' means a Subsidiary other than a Domestic
        Subsidiary."

                '"Fourth Amendment' means the Fourth Amendment to Credit
        Agreement dated as of February 26, 2003 among the Borrower, the Banks
        and the Agent."

                '"Guarantor' means NT International, Entegris Custom Products
        and each other Subsidiary of the Borrower that executes and delivers a
        Guaranty in favor of the Agent and the Banks and (a) "Guarantors" means
        all of them, and (b) "either of the Guarantors" (or similarly
        constructed phrases) means "any of the Guarantors"."

                '"Guaranty' means a Guaranty of a Guarantor in favor of the
        Agent and the Banks, in form and substance satisfactory to the Agent,
        guaranteeing the Obligations, as the same may be amended, supplemented
        or restated from time to time, and "Guaranties" means all of them."

                '"Intercompany Loan' means a loan by the Borrower to one or more
        of its Subsidiaries or a loan by one or more of the Borrower's
        Subsidiaries to the Borrower."

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                '"Maturity Date' means February 27, 2004 with respect to the
        Revolving Facility."

                '"NT International' means NT International, Inc., a Minnesota
        corporation."

                '"Percentage' means, as to any Bank, the percentage set forth
        opposite such Bank's signature on the execution pages of the Fourth
        Amendment, or below such Bank's signature on any Assignment Certificate
        executed by such Bank, representing the ratio of such Bank's Revolving
        Commitment to the Revolving Commitment Amount."

                '"Prime Rate' means the rate of interest publicly announced from
        time to time by the Agent as its "prime" or "base" rate or, if the Agent
        ceases to announce a rate so designated, any similar successor rate
        designated by the Required Banks."

                '"Prior Guarantors' means Empak and Fluoroware."

                '"Prior Guarantor Obligations' means all obligations of Empak
        and/or Fluoroware to the Agent or the Banks under or in connection with
        the Credit Agreement, their respective Guaranties or the other Loan
        Documents as the same existed immediately prior to their merger with and
        into the Borrower, including, without limitation all obligations of
        Fluoroware with respect to the IDRB Financing, IDRB Letter of Credit and
        IDRB Letter of Credit Reimbursement Agreement."

                '"Required Net Worth Amount' [deleted]."

                "'Revolving Commitment' means, with respect to each Bank, the
        amount of the Revolving Commitment set forth opposite such Bank's name
        on the execution pages of the Fourth Amendment, or below such Bank's
        signature on an Assignment Certificate executed by such Bank, unless
        such amount is reduced pursuant to Section 2.14(a) hereof, in which
        event it means the amount to which said amount is reduced pursuant
        thereto, or as the context may require, the obligation of such Bank to
        make Revolving Advances, as contemplated in Section 2.1."

                "'Revolving Commitment Amount' shall mean Forty Million Dollars
        ($40,000,000), being the maximum amount of the Revolving Commitments of
        all Banks, in the aggregate, to make Revolving Advances to the Borrower
        pursuant to Section 2.1, subject to reduction in accordance with Section
        2.14(a)."

                "'Revolving Commitment Period' means a 364-day period commencing
        on February 28, 2003 and ending on the Maturity Date, unless the
        Revolving Commitments are earlier terminated pursuant to Section 7.2 or
        are earlier reduced to zero pursuant to Section 2.14(a)."

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                "'Revolving Note' means a promissory note of the Borrower
        payable to a Bank in the amount of such Bank's Revolving Commitment, in
        substantially the form of Exhibit A (as such promissory note may be
        amended, extended or otherwise modified from time to time), evidencing
        the aggregate indebtedness of the Borrower to such Bank resulting from
        such Bank's Percentage of each Borrowing under the Revolving Facility,
        and also means each promissory note accepted by such Bank from time to
        time in substitution therefor or in renewal thereof."

                '"Specified Affiliates' means OregonLabs LLC, a Minnesota
        limited liability company, Metron Technology, SV, a Netherlands
        corporation, Xiangfan Huaguang Atcor Technolgy, LLC, a Chinese limited
        liability company and Entegris Precision Technology, Ltd., a Taiwan
        corporation."

                '"Specified Receivables' means receivables due to the Borrower
        from a Specified Affiliate on and as of the date of the Fourth
        Amendment, but shall in no event include any receivable generated or due
        on or after the date of the Fourth Amendment."

                '"Specified Investments' means investments by the Borrower in a
        Specified Affiliate on and as of the date of the Fourth Amendment, but
        shall in no event include any investment of the Borrower in or to such
        Specified Affiliate made on or after the date of the Fourth Amendment."

                '"Specified Foreign Trade Receivables' means the aggregate
        amount of all trade receivables due to the Borrower from any one or more
        of its Foreign Subsidiaries."

                "'Tangible Net Worth' of a Person means, as of the applicable
        Covenant Computation Date, the difference between (a) the tangible
        assets of such Person, calculated in accordance with GAAP, after
        deducting adequate reserves in each case where, in accordance with GAAP,
        a reserve is proper and (b) all Debt of such Person; provided, that in
        no event shall there be included as tangible assets: patents,
        trademarks, tradenames, copyrights, licenses, goodwill, receivables due
        from or investments in Affiliates of such Person (but Specified
        Receivables and Specified Investments shall be included as tangible
        assets of the Borrower), prepaid expenses, deposits, deferred charges or
        treasury stock or any securities or Debt of such Person, or any other
        securities unless such securities are readily marketable on a public
        exchange in the United States of America or are entitled to be used as a
        credit against federal income tax liabilities, and any other assets
        designated from time to time by the Agent, in its reasonable discretion,
        as intangible assets."

                '"Tax Expense' means, with respect to any Person with respect
        to the applicable Covenant Computation Period, federal, state, local and
        foreign income tax expense recognized by such Person with respect to
        such Covenant Computation Period, as determined in accordance with
        GAAP."

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                "'Unused Commitment Fee Percentage' means, as of the date of
        determination, the percentage set forth in the table below opposite the
        applicable range of the ratio of Total Funded Debt to EBITDA of the
        Borrower and its Subsidiaries as of such date of determination;
        provided, however, notwithstanding the foregoing, the Unused Commitment
        Fee Percentage shall be 0.200% so long as the Borrower is in compliance
        with the requirements of Section 5.12 hereof. Reductions and increases
        in the Unused Commitment Fee Percentage will be verified by the Agent
        upon receipt of the financial statements of the Borrower and its
        Subsidiaries and related compliance certificate as required under
        Section 5.1(b) of this Agreement. The ratio will be determined on the
        basis of a rolling four quarter calculation of the ratio of Total Funded
        Debt to EBITDA as of the last day of the most recent quarter-end
        reflected in the most recent financial statements delivered by the
        Borrower for the Borrower and its Subsidiaries under Section 5.1(b). Any
        reduction or increase in the Unused Commitment Fee Percentage will
        become effective on the first day of the first month following the
        applicable Quarterly Financial Statement Due Date. If the Borrower fails
        to deliver the financial statements of the Borrower and its Subsidiaries
        and/or related compliance certificate required under Section 5.1(b) on
        or before the applicable Quarterly Financial Statement Due Date, the
        Borrower and its Subsidiaries shall be deemed to have a ratio of Total
        Funded Debt to EBITDA for such quarter of more than 2.00 to 1.00, and
        the Unused Commitment Fee Percentage will be 0.350% beginning on the
        first day of the first month following such Quarterly Financial
        Statement Due Date and will continue as such until the Borrower delivers
        the financial statements of the Borrower and its Subsidiaries for the
        next fiscal quarter in accordance with Section 5.1(b).

              Ratio of Total Funded                    Unused Commitment Fee
                 Debt to EBITDA                             Percentage
         -------------------------------------------------------------------
                   * 2.00/1.00                               0.350%
         -------------------------------------------------------------------
            * 1.50/1.00 to 2.00/1.00                         0.300%
         -------------------------------------------------------------------
            1.00/1.00 to 1.50/1.00                           0.250%
         -------------------------------------------------------------------
                  ** 1.00/1.00                               0.200%
         -------------------------------------------------------------------
* - less than
** - greater than

                3.      Addition of Section 1.2 to the Credit Agreement. Section
1.2 is hereby added to the Credit Agreement as follows:

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                "Section 1.2 References to Empak, Fluoroware and Related
        References. The parties hereto acknowledge and agree that both Empak and
        Fluoroware have been merged with and into the Borrower as contemplated
        by the Second Amendment and that all Prior Guarantor Obligations have
        been assumed by the Borrower as a result of such merger. As a
        consequence of the foregoing, all Prior Guarantor Obligations shall be
        deemed to be obligations of the Borrower and all references in the
        Credit Agreement or any other Loan Document to "Empak" or "Fluoroware"
        or related terms shall be construed consistently with this Section 1.2
        and shall not be given independent or additional effect."

                4.      Addition of Section 1.3 to the Credit Agreement. Section
1.3 is hereby added to the Credit Agreement as follows:

                "Section 1.2 References to Guarantors and Guaranties. Certain
        Subsidiaries of the Borrower have agreed to guarantee the obligations of
        the Borrower under and with respect to the Credit Agreement and the
        other Loan Documents. All references in the Credit Agreement or the
        other Loan Documents to "Guarantors", "Guaranties" or like defined terms
        shall be deemed to refer to the Guarantors and Guaranties as each such
        term is defined in the Credit Agreement as amended, modified or
        otherwise supplemented to date; provided, however, that the foregoing
        shall not limit the Borrower's responsibility for or assumption of the
        Prior Guarantor Obligations."

                5.      Amendment of Section 2.13 of the Credit Agreement.
Section 2.13 of the Credit Agreement is hereby amended in its entirety to read
as follows:

                "Section 2.13 Use of Proceeds. The Proceeds of each Borrowing
        shall be used by the Borrower for its general corporate purposes and may
        from time to time be loaned to its Subsidiaries for their working
        capital and general corporate purposes."

                6.      Amendment to Section 3.2 of the Credit Agreement.
Section 3.2 of the Credit Agreement is hereby amended in its entirety to read as
follows:

                "Section 3.2 Conditions Precedent to All Borrowings. The
        obligation of the Banks to fund each request for a Borrowing or to issue
        each Letter of Credit shall be subject to the further conditions
        precedent that on such date:

                        (a)     the representations and warranties contained in
                Article IV hereof are correct in all material respects on and as
                of the date of such Advance as though made on and as of such
                date; and

                        (b)     no event has occurred and is continuing, or
                would result from such Advance, which constitutes a Default or
                an Event of Default."

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                7.      Amendment to Section 4.15 to the Credit Agreement.
Section 4.15 of the Credit Agreement is hereby amended in its entirety to read
as follows:

                "Section 4.15 Acquisition. The Borrower and Entegris Cayman have
        completed the Acquisition in compliance with all material terms of the
        Acquisition Documents. The Borrower and/or Entegris Cayman have the
        title specified in the Acquisition Documents to all assets the subject
        of the Acquisition and such assets are free and clear of all mortgages,
        security interests, liens and encumbrances, except those specifically
        contemplated by the Acquisition Documents."

                8.      Amendment to Section 5.1(a) of the Credit Agreement.
Section 5.1(a) of the Credit Agreement is hereby amended by deleting the text
"Exhibit B to the Second Amendment" therein and inserting the text "Exhibit E"
in its place.

                9.      Amendments to Section 5.1(b) of the Credit Agreement.
The following amendments are hereby made to Section 5.1(b) of the Credit
Agreement.

                        (a)     The text "Exhibit C to the Second Amendment" is
                hereby deleted and the text "Exhibit F" is hereby inserted in
                its place.

                        (b)     The text "in Sections 5.8 through 5.10" at the
                end of such Section is hereby deleted and the text "the
                Financial Covenants" is hereby inserted in its place.

                10.     Amendment to Section 5.8 of the Credit Agreement.
Section 5.8 of the Credit Agreement is hereby amended to read in its entirety as
follows:

                "Section 5.8 Fixed Charge Coverage Ratio. As of each Covenant
        Computation Date, the Borrower and its Subsidiaries, on a consolidated
        basis, will maintain a Fixed Charge Coverage Ratio of not less than 1.10
        to 1.00."

                11.     Amendment to Section 5.9 of the Credit Agreement.
Section 5.9 of the Credit Agreement is hereby amended to read in its entirety as
follows:

                "Section 5.9 Leverage Ratio. As of each Covenant Computation
        Date, the Borrower and its Subsidiaries, on a consolidated basis, will
        maintain a Leverage Ratio of not more than 2.25 to 1.00."

                12.     Amendment to Section 5.10 of the Credit Agreement.
Section 5.10 of the Credit Agreement is hereby amended to read in its entirety
as follows:

                "Section 5.10 Minimum Tangible Net Worth. As of each Covenant
        Computation Date occurring on or after February 28, 2003, the Borrower
        and its Subsidiaries, on a consolidated basis, will maintain a Tangible
        Net Worth of not less than the sum of $201,000,000 plus (a) fifty
        percent (50%) of the Net Income (unless

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        such amount is negative, in which case it shall be ignored for purposes
        of this Section) realized by the Borrower and its Subsidiaries, on a
        consolidated basis, for each Covenant Computation Period commencing on
        or after December 1, 2002, and (b) fifty percent (50%) of the net cash
        proceeds received by the Borrower and/or its Subsidiaries from any
        equity offering made by the Borrower and/or its Subsidiaries at any time
        on or after December 1, 2002."

                13.     Amendment of Section 5.11 of the Credit Agreement.
Section 5.11 of the Credit Agreement is hereby amended in its entirety to read
as follows:

                "Section 5.11 Minimum Domestic Tangible Net Worth. As of each
        Covenant Computation Date occurring on or after February 28, 2003, the
        Borrower, its Domestic Subsidiaries and the Guarantors, will maintain,
        on a consolidated basis, a Domestic Tangible Net Worth of not less than
        $125,000,000."

                14.     Amendment of Section 5.12 to the Credit Agreement.
Section 5.12 of the Credit Agreement is hereby amended in its entirety to read
as follows:

                "Section 5.12 Minimum Cash and Cash Equivalents. The Borrower
        and its Subsidiaries, on a consolidated basis, will at all times own and
        maintain cash and cash equivalents in an aggregate amount of not less
        than $75,000,000 and the Borrower will at all times cause not less than
        $40,000,000 of such amount to be held and maintained as Domestic Cash."

                15.     Addition of Section 5.13 to the Credit Agreement.
Section 5.13 of the Credit Agreement is hereby added as follows:

                "Section 5.13 Domestic Subsidiaries. The Borrower will cause
        each of its Domestic Subsidiaries, as and when created or acquired, to
        become a Guarantor and to, concurrent with such creation or acquisition,
        execute and deliver a Guaranty to the Agent for the benefit of the
        Banks."

                16.     Addition of Section 5.14 to the Credit Agreement.
Section 5.14 of the Credit Agreement is hereby added as follows:

                "Section 5.14 Opinion of Counsel to Asyst. The Borrower will use
        commercially reasonable efforts to cause counsel to Asyst in connection
        with the Acquisition to provide a reliance letter to the Agent and the
        Banks permitting the Agent and the Banks to rely on such counsel's
        opinion letter delivered in connection with the Acquisition within 30
        days of the date of the Fourth Amendment."

                17.     Amendment of Section 6.1 of the Credit Agreement. Clause
(a) of Section 6.1 of the Credit Agreement is hereby amended in its entirety to
read as follows:

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                "(a) mortgages, deeds of trust, pledges, liens, security
        interests and assignments in existence on the effective date of the
        Fourth Amendment and listed in Schedule 6.1 (including any subsequent
        extension or renewal of such mortgages, deeds of trust, pledges, liens,
        security interests and assignments to the extent (i) the related
        extension or renewal of the Debt secured thereby is otherwise permitted
        under this Agreement, (ii) the principal amount secured thereby is not
        increased above the amount outstanding immediately prior to such
        extension or renewal, and (iii) the property subject thereto is not
        increased)."

                18.     Amendment of Section 6.2 of the Credit Agreement.
Clauses (e), (h) and (i) of Section 6.2 of the Credit Agreement are hereby
amended in their entirety to read and clause (j) is hereby added thereto as
follows:

                        (e)     Subordinated Debt, or renewals thereof, provided
                that (a) it is subordinated to the prior payment of all
                indebtedness, reimbursement obligations and guaranties of the
                Borrower and its Subsidiaries in favor of the Banks on terms and
                conditions approved in writing by the Banks and (b) the
                aggregate amount of Subordinated Debt at any one time
                outstanding does not exceed $5,000,000 (all Subordinated Debt is
                properly reflected in Schedule 6.2);

                        (h)     Indebtedness for borrowed money in foreign
                currencies in an aggregate principal amount not to exceed at any
                time $30,000,000 (all Indebtedness for borrowed money in foreign
                currencies is properly reflected in Schedule 6.2);

                        (i)     Indebtedness for borrowed money not permitted by
                any other subsection of this Section 6.2 in an aggregate
                principal amount not to exceed at any time $10,000,000; and

                        (j)     Indebtedness arising from Intercompany Loans.

                19.     Amendment of Section 6.3 of the Credit Agreement. Clause
(c) of Section 6.3 of the Credit Agreement is hereby amended in its entirety to
read as follows:

                "(c) guaranties, endorsements and other direct or contingent
        liabilities in connection with the obligations of other Persons listed
        in Schedule 6.3, together with any extension, renewal or replacement
        thereof (so long as such indebtedness is not increased above the amount
        outstanding immediately prior to giving effect to any such extension,
        renewal or replacement);"

                20.     Amendment of Section 6.4 of the Credit Agreement.
Section 6.4 of the Credit Agreement is hereby amended in its entirety to read as
follows:

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                '"Section 6.4 Investments. The Borrower will not, and will not
        permit any Subsidiary to, purchase or hold beneficially any stock or
        other securities or evidences of indebtedness of, make or permit to
        exist any loans or advances to, or create or acquire any Subsidiary or
        make any investment or acquire any interest whatsoever in, any other
        Person, except:

                        (a)     investments (either directly or through mutual
                funds) in direct obligations of the United States of America or
                any agency or instrumentality thereof whose obligations
                constitute the full faith and credit obligations of the United
                States of America having a maturity of one year or less,
                commercial paper issued by a U.S. corporation rated "A-1" or
                "A-2" by Standard & Poors Rating Group or "P-1" or "P-2" by
                Moody's Investors Service, certificates of deposit or bankers'
                acceptances having a maturity of one year or less issued by
                members of the Federal Reserve System having deposits in excess
                of $100,000,000 (which certificates of deposit or bankers'
                acceptances are fully insured by the Federal Deposit Insurance
                Corporation) and such other investments as the Borrower shall
                request and the Banks shall approve in writing;

                        (b)     any investment by the Borrower or any of its
                Subsidiaries in the stock of any Subsidiary or in the stock of
                any Affiliate set forth on Schedule 4.4;

                        (c)     Intercompany Loans;

                        (d)     loans to officers and employees of the Borrower
                or officers and employees of any of its Subsidiaries not
                exceeding at any one time an aggregate of $500,000;

                        (e)     travel advances to officers and employees of the
                Borrower or officers and employees any of its Subsidiaries or
                any other similar advances in the ordinary course of business;

                        (f)     advances in the form of progress payments,
                prepaid rent or security deposits or any other similar advances
                in the ordinary course of business;

                        (g)     the acquisition of the stock or assets of
                another Person so long as, prior to each such acquisition, the
                Borrower has submitted to the Agent financial projections,
                certificates and other documentation which establish that, after
                giving effect to such acquisition:

                                        (A)   the Borrower and its Subsidiaries
                                              will be in compliance with all
                                              covenants and terms of this

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                                              Agreement and the other Loan
                                              Documents through the Maturity
                                              Date;

                                        (B)   the acquired business of such
                                              Person is in the same line of
                                              business as an existing business
                                              of the Borrower or its
                                              Subsidiaries; and

                                        (C)   all consideration (whether in the
                                              form of cash paid, indebtedness
                                              assumed or otherwise) given by the
                                              Borrower and its Subsidiaries for
                                              acquisitions permitted under this
                                              Section 6.4(g) shall not exceed an
                                              aggregate amount of $25,000,000
                                              during the fiscal year in which
                                              such acquisition occurs (provided,
                                              however, that the Acquisition
                                              shall not be counted for purposes
                                              of determining compliance with the
                                              $25,000,000 limitation set forth
                                              in this Section 6.4(g)(C)); and

                        (h)     the Acquisition."

                21.     Amendment of Section 6.6 of the Credit Agreement.
Clauses (b) and (c) of Section 6.6 of the Credit Agreement are hereby amended in
their entirety to read and clause (d) is hereby added as follows:

                        (b)     sales, leases and assignments by the Borrower or
                any of its Subsidiaries of its properties in the ordinary course
                of its business;

                        (c)     sales or leases by the Borrower or any of its
                Subsidiaries of its surplus, obsolete or worn-out properties; or

                        (d)     Intercompany Loans."

                22.     Amendment of Section 6.8 of the Credit Agreement.
Section 6.8 of the Credit Agreement is hereby amended to delete the reference to
"Section 6.4(g)" at the end of such Section and to insert the text "Section 6.4"
in its place.

                23.     Amendment of Section 7.1 of the Credit Agreement.
Section 7.1 of the Credit Agreement is hereby amended by amending clauses (d)
and (n) thereof to read in their entirety as follows:

                "(d) default in the performance, or breach, of any covenant or
        agreement on the part of the Borrower contained in any Financial
        Covenant or in Article VI; or"

                                     - 12 -

<PAGE>

                "(n) any Guarantor shall repudiate, purport to revoke or fail to
        perform any of such Guarantor's obligations under its Guaranty or any
        other Loan Document to which it is a party; or"

                24.     Revised Schedules. The following Schedules and/or
Exhibits to the Credit Agreement (whether originally attached to the Credit
Agreement or subsequently becoming part of the Credit Agreement by amendment)
are hereby replaced in their entirety as follows:

                (a)     Exhibit A to the Second Amendment (originally given in
        replacement of Exhibit A to the Credit Agreement) is hereby replaced by
        Exhibit A to the Fourth Amendment, with the effect that Exhibit A to the
        Fourth Amendment shall hereafter constitute Exhibit A for all purposes
        of the Credit Agreement.

                (b)     Exhibit B to the Second Amendment (originally given in
        replacement of Exhibit E to the Credit Agreement) is hereby replaced by
        Exhibit B to the Fourth Amendment, with the effect that Exhibit B to the
        Fourth Amendment shall hereafter constitute Exhibit E for all purposes
        of the Credit Agreement.

                (c)     Exhibit C to the Second Amendment (originally given in
        replacement of Exhibit F to the Credit Agreement) is hereby replaced by
        Exhibit C to the Fourth Amendment, with the effect that Exhibit C to the
        Fourth Amendment shall hereafter constitute Exhibit F for all purposes
        of the Credit Agreement.

                (d)     Schedule 4.4 to the Second Amendment (originally given
        in replacement of Schedule 4.4 to the Credit Agreement) is hereby
        replaced by Schedule 4.4 to the Fourth Amendment, with the effect that
        Schedule 4.4 to the Fourth Amendment shall hereafter constitute Schedule
        4.4 for all purposes of the Credit Agreement.

                (e)     Schedule 6.1 to the Second Amendment (originally given
        in replacement of Schedule 6.1 to the Credit Agreement) is hereby
        replaced by Schedule 6.1 to the Fourth Amendment, with the effect that
        Schedule 6.1 to the Fourth Amendment shall hereafter constitute Schedule
        6.1 for all purposes of the Credit Agreement.

                (f)     Schedule 6.2 to the Second Amendment (originally given
        in replacement of Schedule 6.2 to the Credit Agreement) is hereby
        replaced by Schedule 6.2 to the Fourth Amendment, with the effect that
        Schedule 6.2 to the Fourth Amendment shall hereafter constitute Schedule
        6.2 for all purposes of the Credit Agreement.

                (g)     Schedule 6.3 to the Second Amendment (originally given
        in replacement of Schedule

                                     - 13 -

<PAGE>

        6.3 to the Credit Agreement) is hereby replaced by Schedule 6.3 to the
        Fourth Amendment, with the effect that Schedule 6.3 to the Fourth
        Amendment shall hereafter constitute Schedule 6.3 for all purposes of
        the Credit Agreement.

                25.     Amendment Fee. In consideration of the Banks'
entering into this Amendment, the Borrower shall pay to the Agent, for the
ratable benefit of the Banks in accordance with their Percentages, a facility
increase fee of 0.125% of the increase in the Revolving Commitment Amount
effected by this Amendment. Such fee shall be deemed fully earned by the Banks'
execution and delivery of this Amendment.

                26.     Conditions Precedent. This Amendment shall become
effective when the Agent shall have received the following, each in form and
content acceptable to the Agent in its sole discretion:

                (a)     This Amendment duly executed on behalf of the Borrower,
        the Banks and the Agent;

                (b)     A Revolving Note duly executed on behalf of the Borrower
        in favor of each Bank in the amount of such Bank's Revolving Commitment,
        issued in substitution for and replacement of, but not payment of such
        Bank's Revolving Note (as defined in the Second Amendment);

                (c)     Copies of the executed Acquisition Documents;

                (d)     A certified copy of the resolutions of the board of
        directors of the Borrower evidencing approval of the Amendment and all
        matters contemplated hereby;

                (e)     A signed copy of a certificate of the Secretary or an
        Assistant Secretary of the Borrower, which shall certify (i) the names
        of the officers of the Borrower authorized to sign the Amendment and the
        documents to be executed by the Borrower in connection therewith,
        together with the true signatures of such officers, (ii) the resolutions
        described in (e) above, and (iii) that the Articles of Incorporation and
        Bylaws of the Borrower certified to the Agent and the Banks in
        connection with the Consent remain in full force and effect and have not
        been amended or modified since such certification;

                (f)     A certificate of good standing of the Borrower, dated
        not more than thirty (30) days prior to the date hereof;

                (g)     A certified copy of the resolutions of the sole
        shareholder of NT International evidencing approval of its Guaranty and
        all matters contemplated thereby;

                                     - 14 -

<PAGE>

                (h)     Copies of the Articles of Incorporation and Bylaws of NT
        International certified by the Secretary or Assistant Secretary of the
        Borrower, the sole shareholder of NT International, as being true and
        correct copies thereof;

                (i)     A signed copy of a certificate of the Secretary or an
        Assistant Secretary of the Borrower, the sole shareholder of NT
        International, which shall certify the names of the officers of NT
        International authorized to sign its Guaranty and the documents to be
        executed by NT International in connection therewith, together with the
        true signatures of such officers.

                (j)     A certificate of good standing of NT International,
        dated not more than thirty (30) days prior to the date hereof;

                (k)     A certified copy of the resolutions of the sole
        shareholder of Entegris Custom Products evidencing approval of its
        Guaranty and all matters contemplated thereby;

                (l)     Copies of the Articles of Incorporation and Bylaws of
        Entegris Custom Products certified by the Secretary or Assistant
        Secretary of the Borrower, the sole shareholder of Entegris Custom
        Products, as being true and correct copies thereof;

                (m)     A signed copy of a certificate of the Secretary or an
        Assistant Secretary of the Borrower, the sole shareholder of Entegris
        Custom Products, which shall certify the names of the officers of
        Entegris Custom Products authorized to sign its Guaranty and the
        documents to be executed by Entegris Custom Products in connection
        therewith, together with the true signatures of such officers;

                (n)     A certificate of good standing of Entegris Custom
        Products, dated not more than thirty (30) days prior to the date hereof;

                (o)     Current searches of appropriate filing offices showing
        that no state or federal tax liens have been filed and remain in effect
        against the Borrower, NT International or Entegris Custom Products and
        that no financing statements or other notifications or filings have been
        filed and remain in effect against the Borrower, NT International or
        Entegris Custom Products other than those for which the Agent has
        received an appropriate release, termination or satisfaction or those
        permitted in accordance with Section 6.1 of the Credit Agreement;

                (p)     A signed copy of an opinion of counsel to the Borrower,
        NT International and Entegris Custom Products, addressed to the Agent
        and the Banks; and

                (q)     The Guaranties of NT International and Entegris Custom
        Products, duly executed on behalf of such parties.

                                     - 15 -

<PAGE>

                27.     Reference to and Effect on the Credit Agreement and the
other Loan Documents. Except as otherwise amended by this Amendment, all of the
terms and conditions of the Credit Agreement and the other Loan Documents prior
to giving effect to this Amendment shall remain in full force and effect in
accordance with their terms.

                28.     Counterparts. This Amendment may be executed in any
number of counterparts, each of which shall be deemed to be an original and all
of which counterparts taken together shall constitute but one and the same
instrument.

                29.     Borrower Release. The Borrower hereby absolutely and
unconditionally releases and forever discharges the Agent and each of the Banks,
and any and all participants, parent corporations, subsidiary corporations,
affiliated corporations, insurers, indemnitors, successors and assigns thereof,
together with all of the present and former directors, officers, agents and
employees of any of the foregoing (the "Released Parties"), from any and all
claims, demands or causes of action of any kind, nature or description, whether
arising in law or equity or upon contract or tort or under any state or federal
law or otherwise, which the Borrower has had, now has or has made claim to have
against such Released Party for or by reason of any act, omission, matter, cause
or thing whatsoever arising from the beginning of time to and including the date
of this Amendment in connection with or related to the transactions evidenced by
the Loan Documents, whether such claims, demands and causes of action are mature
or unmatured or known or unknown.

                30.     No Waiver. The execution of this Amendment shall not be
deemed to be a waiver of any Default or Event of Default under the Credit
Agreement, whether or not known to the Agent and/or the Banks and whether or not
existing on the date of this Amendment.

                31.     Representations and Warranties of the Borrower. The
Borrower hereby represents and warrants to the Agent and the Banks as follows:

                (a)     The Borrower has all requisite power and authority to
        execute this Amendment and the Revolving Notes and to perform all of its
        obligations under the Credit Agreement, as amended by this Amendment,
        and the Credit Agreement, as amended by this Amendment, this Amendment,
        the Revolving Notes and the other Loan Documents executed on behalf of
        the Borrower have been duly executed and delivered by the Borrower and
        constitute the legal, valid and binding obligations of the Borrower,
        enforceable in accordance with their respective terms.

                (b)     The execution, delivery and performance by the Borrower
        of the Credit Agreement, as amended by this Amendment, the Amendment,
        the Revolving Notes and the other Loan Documents executed on behalf of
        the Borrower have been duly authorized by all necessary corporate action
        and do not (i) require any authorization, consent or approval by any
        governmental department, commission, board, bureau, agency or
        instrumentality, domestic or foreign, (ii) violate any provision of any
        law,

                                     - 16 -

<PAGE>

        rule or regulation or of any order, writ, injunction or decree presently
        in effect, having applicability to the Borrower, or the Articles of
        Incorporation or Bylaws of the Borrower, or (iii) result in a breach of
        or constitute a default under any indenture or loan or credit agreement
        or any other agreement, lease or instrument to which the Borrower is a
        party or by which it or its properties may be bound or affected.

                (c)     All of the representations and warranties contained in
        Article IV of the Credit Agreement are correct on and as of the date
        hereof as though made on and as of such date, except to the extent that
        such representations and warranties relate solely to an earlier date.

                32.     References. All references in the Credit Agreement to
"this Agreement" shall be deemed to refer to the Credit Agreement as amended by
this Amendment; and any and all references in any of the other Loan Documents to
the "Credit Agreement" shall be deemed to refer to the Credit Agreement as
amended by this Amendment. All references to schedules or exhibits in the Credit
Agreement shall be deemed to include the amendments to such schedules and
exhibits effected hereby.

                             Signature Page Follows

                                     - 17 -

<PAGE>

                IN WITNESS WHEREOF, the parties hereto have caused this
Amendment to be executed by their respective officers thereunto duly authorized
as of the date first above written.

Address:                                ENTEGRIS, INC.
3500 Lyman Boulevard
Chaska, Minnesota 55318
Attn:  John Villas                      By        /s/ James E. Dauwalter
Telecopy No. (952) 556-8644                -------------------------------------
                                            Its     Chief Executive Officer
                                                --------------------------------

                                        And

                                        By            /s/ John Villas
                                           -------------------------------------
                                            Its     Chief Financial Officer
                                                --------------------------------

Address:                                WELLS FARGO BANK, NATIONAL
7900 Xerxes Avenue South                 ASSOCIATION, , as a Bank and as Agent
MAC N9307-013
Bloomington, Minnesota  55431
Attn:  Richard G. Trembley
Telecopy No. (612) 316-1621

Revolving Commitment:  $20,000,000      By        /s/ Richard G. Trembley
Percentage:  50%                           -------------------------------------
                                            Its          Vice President
                                                --------------------------------

Address:                                HARRIS TRUST AND SAVINGS BANK, as
111 West Monroe                          Bank
P.O. Box 755
Chicago, Illinois  60690
Attn:  Michael M. Fordney
Telecopy No. (312) 293-5040

Revolving Commitment:  $20,000,000      By        /s/ Michael M. Fordney
Percentage:  50%                           -------------------------------------
                                            Its          Vice President
                                                --------------------------------

                                     - 18 -

             Signature Page to Fourth Amendment to Credit Agreement

<PAGE>

                                                                    EXHIBIT A TO
                                                                FOURTH AMENDMENT

                                 REVOLVING NOTE

$20,000,000                                               Minneapolis, Minnesota
                                                               February 26, 2003

           FOR VALUE RECEIVED, the undersigned, ENTEGRIS, INC., a Minnesota
corporation (the "Borrower"), hereby promises to pay to the order of
________________ (the "Bank"), at the main office of Wells Fargo Bank, National
Association, as Agent (herein, in such capacity, the "Agent"), in Minneapolis,
Minnesota, or at any other place designated at any time by the holder hereof, in
lawful money of the United States of America and in immediately available funds,
the principal sum of Twenty Million Dollars ($20,000,000) or, if less, the
aggregate unpaid principal amount of all Revolving Advances made by the Bank to
the Borrower under the Credit Agreement (defined below), together with interest
on the principal amount hereunder from the date hereof until this Note is fully
paid at the rates from time to time in effect under the Credit Agreement dated
as of November 30, 1999, by and among the Borrower, the Agent, the Bank and the
various other banks as therein described, as amended by a First Amendment to
Credit Agreement dated as of October 17, 2000, a Second Amendment to Credit
Agreement dated as of March 1, 2002, a Consent and Amendment dated as of
February 7, 2003 and a Fourth Amendment to Credit Agreement of even date
herewith (as so amended and as hereafter amended, supplemented or otherwise
modified from time to time, the "Credit Agreement").

           The principal hereof and interest accruing thereon shall be due and
payable as provided in the Credit Agreement. This Note may be prepaid only in
accordance with the Credit Agreement.

           This Note is issued pursuant to, and is subject to, the Credit
Agreement, which provides, among other things, for acceleration hereof upon the
occurrence of certain events. This Note is a Revolving Note as referenced in the
Credit Agreement. This Note is issued in replacement of, and in substitution
for, but not in payment of, that certain Revolving Note of the Borrower dated
March 1, 2002, payable to the order of the Bank in the original principal amount
of $10,000,000.

           The Borrower hereby agrees to pay all costs of collection, including
attorneys' fees and legal expenses in the event this Note is not paid when due,
whether or not legal proceedings are commenced.

                                       A-1

<PAGE>

           Presentment or other demand for payment, notice of dishonor and
protest are expressly waived.

                                        ENTEGRIS, INC.

                                        By ______________________________
                                           Its __________________________

                                        And

                                        By ______________________________
                                           Its __________________________

                                       A-2

<PAGE>

                                                                    EXHIBIT B TO
                                                                FOURTH AMENDMENT

    Certificate of Chief Financial Officer as to Annual Financial Statements

TO:               Wells Fargo Bank,
           National Association, as Agent
           7900 Xerxes Avenue South
           MAC N9307-013
           Bloomington, Minnesota 55431
           Attention: Richard G. Trembley

Date:      __________________, _____

Re:        Audited Annual Financial Statements - Entegris, Inc. (the "Borrower")

           We refer to the Credit Agreement dated as of November 30, 1999 (as
amended, supplemented or otherwise modified to date, the "Credit Agreement")
among the Borrower, certain banks named therein (the "Banks") and Wells Fargo
Bank, National Association, as Agent for such Banks. Capitalized terms used
herein but not otherwise defined shall have the same meanings assigned to them
in the Credit Agreement.

           I am the duly qualified and acting Chief Financial Officer of the
Borrower, and I am familiar with the financial statements and financial affairs
of the Borrower and its Subsidiaries and am authorized to execute this
Certificate on behalf of the Borrower.

           Pursuant to Section 5.1(a) of the Credit Agreement, attached are the
audited financial statements of the Borrower and its Subsidiaries prepared by
_________________ as of and for the fiscal year ended ______________, ____. I
certify that such financial statements have been prepared in accordance with
GAAP, fairly present the financial condition of the Borrower and its
Subsidiaries and the results of the operations of the Borrower and its
Subsidiaries for the period then ended, and conform to the requirements of
Section 5.1(a) of the Credit Agreement. I further certify that I have obtained
no knowledge,

                                       B-1

<PAGE>

except as specifically stated in the attachment hereto, of any Default or Event
of Default.

                                        ENTEGRIS, INC.

                                        By ______________________________
                                           Its __________________________

                                        And

                                        By ______________________________
                                           Its __________________________

                                       B-2

<PAGE>

                                                                    EXHIBIT C TO
                                                                FOURTH AMENDMENT

Certificate of Chief Financial Officer as to Fiscal Quarter Financial Statements

TO:               Wells Fargo Bank,
           National Association, as Agent
           7900 Xerxes Avenue South
           MAC N9307-013
           Bloomington, Minnesota 55431
           Attention:  Richard G. Trembley

Date:      __________________, ______

Re:        Fiscal Quarter Financial Statements - Entegris, Inc. (the "Borrower")

           We refer to the Credit Agreement dated as of November 30, 1999 (as
amended, supplemented or otherwise modified to date, the "Credit Agreement")
among the Borrower, certain banks named therein (the "Banks") and Wells Fargo
Bank, National Association, as Agent for such Banks. Capitalized terms used
herein but not otherwise defined shall have the same meanings assigned to them
in the Credit Agreement.

           I am the duly qualified and acting Chief Financial Officer of the
Borrower, and I am familiar with the financial statements and financial affairs
of the Borrower and its Subsidiaries and am authorized to execute this
Certificate on behalf of the Borrower.

           Pursuant to Section 5.1(b) of the Credit Agreement, attached are the
required unaudited financial statements of the Borrower and its Subsidiaries as
of __________________ (the "Covenant Computation Date"). I certify that such
financial statements have been prepared in accordance with GAAP, fairly present
the financial condition of the Borrower and its Subsidiaries as of the Covenant
Computation Date and the results of the operations of the Borrower and its
Subsidiaries for the period then ended, subject to year-end adjustments, and
conform to the requirements of Section 5.1(b) of the Credit Agreement.

           Events of Default. (Check one):

           [_] The undersigned does not have knowledge of the occurrence of a
           Default or Event of Default under the Credit Agreement.

           [_] The undersigned has knowledge of the occurrence of a Default or
           Event of Default under the Credit Agreement and attached hereto is a
           statement of the facts with respect to thereto.

           A.  Floating Rate Margin, Eurodollar Rate Margin and Unused
Commitment Fee Percentage. I further certify that:

           1.  Ratio of Total Funded Debt to EBITDA as of Covenant Computation
   Date. The applicable Ratio of Total Funded Debt to EBITDA for the Covenant
   Computation Date is _____ to 1.00.

                                       C-1

<PAGE>

                  2. Minimum Cash and Cash Equivalents. The Borrower [_] has [_]
           has not satisfied the requirements of Section 5.12 at all times
           during the fiscal quarter immediately preceding the Covenant
           Computation Date.

                  3. Floating Rate Margin. Commencing on the first day of the
           first month following the applicable Quarterly Financial Statement
           Due Date, the Floating Rate Margin shall be _______%.

                  4. Eurodollar Rate Margin. Commencing on the first day of the
           first month following the applicable Quarterly Financial Statement
           Due Date, the Eurodollar Margin shall be _________%.

                  5. Unused Commitment Fee Percentage. Commencing on the first
           day of the first month following the applicable Quarterly Financial
           Statement Due Date, the Unused Commitment Fee Percentage shall be
           __________%.

                  B. Financial Covenants. I further hereby certify as follows:

                  1. Fixed Charge Coverage Ratio. Pursuant to Section 5.8 of the
           Credit Agreement, as of the Covenant Computation Date, the Fixed
           Charge Coverage Ratio of the Borrower and its Subsidiaries was _____
           to 1.00 which [_] satisfies [_] does not satisfy the requirement that
           such ratio be not less than 1.10 to 1.00 on the Covenant Computation
           Date.

                  2. Leverage Ratio. Pursuant to Section 5.9 of the Credit
           Agreement, as of the Covenant Computation Date, the Leverage Ratio of
           the Borrower and its Subsidiaries was _____ to 1.00 which [_]
           satisfies [_] does not satisfy the requirement that such ratio be not
           more than 2.25 to 1.00 on the Covenant Computation Date.

                  3. Minimum Tangible Net Worth. Pursuant to Section 5.10 of the
           Credit Agreement, as of the Covenant Computation Date, the Tangible
           Net Worth of the Borrower and its Subsidiaries was $___________ which
           [_] satisfies [_] does not satisfy the requirement that the
           Borrower's Tangible Net Worth be not less than the sum of
           $201,000,000 plus (a) fifty percent (50%) of the Net Income (unless
           such amount is negative, in which case it shall be ignored for
           purposes of this Section) realized by the Borrower and its
           Subsidiaries, on a consolidated basis, for each Covenant Computation
           Period commencing on or after December 1, 2002, and (b) fifty percent
           (50%) of the net cash proceeds received by the Borrower and/or its
           Subsidiaries from any equity offering made by the Borrower and/or its
           Subsidiaries at any time on or after December 1, 2002.

                  4. Minimum Domestic Tangible Net Worth. Pursuant to Section
           5.11 of the Credit Agreement, as of the Covenant Computation Date,
           the Domestic Tangible Net Worth of the Borrower, its Domestic
           Subsidiaries and the Guarantors was $______________, which [_]
           satisfies [_] does not satisfy the requirement that such Domestic
           Tangible Net Worth be not less than $125,000,000.

                  5. Minimum Cash and Cash Equivalents. Pursuant to Section 5.12
           of the Credit Agreement, as of the Covenant Computation Date, the
           cash and cash equivalents of the Borrower and its Subsidiaries, on a
           consolidated basis, were

                                       C-2

<PAGE>

           $_________________, which [_] satisfies [_] does not satisfy the
           requirement that such cash and cash equivalents be not less than
           $75,000,000 at any time and $_____________ of such cash and cash
           equivalents constitute Domestic Cash which [_] satisfies [_] does not
           satisfy the requirement that Domestic Cash be not less than
           $40,000,000 at any time.

                  Set forth on Schedule I attached hereto are all relevant facts
in reasonable detail to evidence and to compute (A) the ratio of Total Funded
Debt to EBITDA of the Borrower and its Subsidiaries for purposes of establishing
the appropriate Floating Rate Margin, Eurodollar Rate Margin and Unused
Commitment Fee Percentage and (B) whether or not the Borrower is in compliance
with the Financial Covenants.

                                       ENTEGRIS, INC.

                                       By _________________________________
                                          Its _____________________________

                                       And

                                       By _________________________________
                                          Its _____________________________

                                       C-3

<PAGE>

                                                SCHEDULE 4.4 TO FOURTH AMENDMENT

             SCHEDULE OF SUBSIDIARIES AND AFFILIATES OF THE BORROWER

 Entegris, Inc.
 Subsidiaries
        Feb-03

<TABLE>
<CAPTION>
 Jurisdiction          % Ownership   Name                                         Classification
 --------------------------------------------------------------------------------------------------
 <S>                   <C>           <C>                                          <C>
 US                                  Entegris, Inc.                               Parent
 US                         100%     Entegris Custom Products, Inc.               Subsidiary
 US                         100%     NT International, Inc.                       Subsidiary
 US-Taiwan                  100%     Entegris Taiwan, Inc.                        Subsidiary
 US-Netherlands Branch      100%     Entegris Netherlands, Inc.                   Subsidiary
 US                         100%     Electrol Specialities                        Subsidiary
 Cayman                     100%     Entegris Cayman, LTD                         Subsidiary
 Germany                    100%     Entegris Europe, GmbH                        Subsidiary
 Japan                      100%     Entegris Japan, K.K.                         Subsidiary
 Japan                      100%     Entegris Techno, K.K.                        Subsidiary
 Singapore                  100%     Fluoroware S.E. Asia, Pte. Ltd.              Subsidiary
 France                     100%     Entegris France, SARL                        Subsidiary
 Korea                      100%     Entegris Korea, Inc.                         Subsidiary
 Japan                      100%     Fluoroware Valqua Japan, K.K.                Subsidiary
 Jamaica                    100%     Fluoroware Jamaica, Ltd.                     Subsidiary
 Malaysia                   100%     Entegris Malaysia, Sdn. Bhd.                 Subsidiary
 Barbados                   100%     Empak, FSC                                   Subsidiary
 Singapore                  100%     Entegris Singapore Pte. Ltd.                 Subsidiary
 Singapore                   70%     Atcor JCS, Pte. Ltd.                         Subsidiary

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

 Entegris, Inc.
 Affiliates
        Feb-03

<TABLE>
<CAPTION>
 Jurisdiction          % Ownership   Name                                         Classification
 --------------------------------------------------------------------------------------------------
 <S>                   <C>           <C>                                          <C>
 US                          49%     Oregon Labs                                  Affiliate
 Netherlands                 13%     Metron Technology, SV                        Affiliate
 PRC                         45%     Xiangfan Huaguang Atcor Technology, LLC      Affiliate
 Taiwan                      50%     Entegris Precision Technology, Ltd.          Affiliate

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

<PAGE>

                           Schedules 6.1, 6.2 and 6.3

<TABLE>
<CAPTION>
                                                                        --------------------------------------------------------
Entegris                                                                6.2 Indebtness                 6.1 Liens/Mortgages
                                                                        --------------------------------------------------------
  August 31, 2002

                                                                        Total          Current
Long-Term Debt                        Party                             Debt                      2003 Liens
--------------------------------------------------------------------------------------------------------------------------------
<S>       <C>         <C>             <C>                               <C>              <C>           <C>
                      Entegris        Ann Zitzloff                             247,128          52,489 Subordinated
                      US              Wayne Zitzloff                           199,825          42,366 Subordinated
                                      DRKW                                     934,232         421,278 SAP Software
                                      Dan Quernemoen                         2,860,727         251,676 Subordinated
                                                                        -------------------------------
                                      Total Entegris                         4,241,912         767,809
                                                                        -------------------------------

          0.981836033 GmbH            Commerzbank HN                           223,091          55,783 Secured Equip/Bldg
                      Germany         Commerzbank HN                            85,052          36,817 Secured Equip/Bldg
                                      Commerzbank HN                            49,402          19,769 Secured Equip/Bldg
                                      Commerzbank HN                           373,115         124,372 Secured Equip/Bldg
                                      Commerzbank HN                         1,016,560         225,902 Secured Equip/Bldg
                                                                        -------------------------------
                                      Total GmbH                             1,747,220         462,643
                                                                        -------------------------------

          0.008449514 New FVJ         Japan Finance Corp                     1,704,436         127,757 Secured Equip/Bldg
                      Japan           Yamagata Bank                             49,438          49,438 Secured Equip/Bldg
                                      Bond                                   1,858,893                 Secured Equip/Bldg
                                      Yamagata Bank                            577,237         223,371 Secured Equip/Bldg
                                      Yamagata Bank                            222,814         140,938 Secured Equip/Bldg
                                                                        -------------------------------
                                      Total Nippon                           4,412,818         541,504 Secured Equip/Bldg
                                                                        -------------------------------

                      Custom Products IRB                                    1,150,000         100,000 Secured Bldg
                                                                        -------------------------------
                      US              Total CP                               1,150,000         100,000 Guranteed by Entegris
                                                                        -------------------------------

          0.008449514 E-Techno        Loan #3                                   97,169          50,697 Secured Equip
                                                                        -------------------------------
                      Japan           Total Techno                              97,169          50,697
                                                                        -------------------------------

                      Entegris        Jennifer & Sharon King                    87,500          87,500 No Security
                      US              Shinsho America                           11,076          11,076 No Security
                                      Ford Credit                               14,754           9,569 Secured Equip
                                      Trinity Capital                            2,004           2,004 Secured Equip
                                                                        -------------------------------
                                      Total Atcor                              115,334         110,149
                                                                        -------------------------------

                      Entegris        SBA Loan 2                               943,124          25,791 Secured Bldg/Land
                      US              SBA Loan 1                             1,954,745          29,077 Secured Bldg/Land
                                      Capital Lease US Bankcorp                 64,539          16,910 Secured Equip
                                      Capital Lease Santa Barbara               56,580          14,150 Secured Equip
                                      Capital Lease Network Cap                 51,812          25,907 Secured Equip
                                                                        -------------------------------
                                      Total CCS                              3,070,800         111,835
                                                                        -------------------------------

                                                                        -------------------------------
                      Consolidated:                                         14,835,253       2,144,637
                                                                        -------------------------------

<CAPTION>
                                                                        --------------------------------------------------------
Entegris                                                                6.2 Indebtness                 6.1 Liens/Mortgages
                                                                        --------------------------------------------------------
  August 31, 2002

                                                                        Total          Current
Short-term Debt                       Party                             Debt                      2003 Liens
--------------------------------------------------------------------------------------------------------------------------------
<S>                   <C>             <C>                               <C>              <C>           <C>
                      FVJ             Bank of Tokyo Mitsubishi               2,365,864       2,365,864 Secured Assets
                      Japan           Sumitomo Mitsui Bank                   1,689,903       1,689,903 Secured Assets
                                      Mizuho Bank                            3,379,806       3,379,806 Secured Assets
                                      Mizuzo Bank                              211,238         211,238 Secured Assets
                                      UFJ Bank                                 337,981         337,981 Secured Assets

                      E-Techno        Bank of Tokyo Mitsubishi               1,436,417       1,436,417 Secured Assets
                      Japan

                                                                             9,421,208       9,421,208
                                                                        -------------------------------------------

<CAPTION>
                                                                        Total          Current
New Short-term Debt                   Party                             Debt                      2003 Liens
--------------------------------------------------------------------------------------------------------------------------------
<S>                   <C>             <C>                               <C>              <C>           <C>
  February 1, 2003    Entegris        Wells Fargo/Harris                    14,000,000      14,000,000 Unsecured
                      US
</TABLE>

----------------------
Exhibt 6.3
----------------------

<TABLE>
<CAPTION>
                                                                        Total          Current
Guarantees                            Party                             Debt                      2003 Liens
--------------------------------------------------------------------------------------------------------------------------------
<S>                   <C>             <C>                               <C>              <C>           <C>
                      Entegris        Frank Bazo, Dale Sieberling            3,420,000                 Unsecured
                      US              Earn-out,Bldg Lease, Salaries
                                      related to ESC acquisiton January 2003
</TABLE>Termination Agreement

 Exhibit 10.28 
  
 TERMINATION AGREEMENT 
  
 This TERMINATION AGREEMENT (“Agreement”) is made and entered into as of the 15th day of May, 2003, by and between COLINAS CROSSING LP, a
Delaware limited partnership (“Landlord”), i2 TECHNOLOGIES US, INC., a Nevada corporation (“Tenant”) and i2 TECHNOLOGIES, INC., a Delaware corporation (“Original Tenant”). 
  
 RECITALS: 
  
 A.    Landlord and Original Tenant, Tenant’s predecessor in interest, entered into that certain
Lease dated August 3, 1999 (“Original Lease”) whereby Landlord leased to Original Tenant substantially all of the Rentable Area (as defined in the Original Lease) in that building (the “Building”) located in Dallas, Texas, known
as Two Colinas Crossing, and having as its address 11511 Luna Road, situated on a tract of land more particularly described on Exhibit A attached hereto (the “Land”). The space in the Building encumbered by the Lease is referred to
herein and in the Lease as the “Premises”. The Original Lease was amended by Landlord and Original Tenant pursuant to a certain First Amendment to Lease dated as of July 1, 2001 (the “First Amendment”). 
  
 B.    Prior to entering into the Original Lease, Landlord
and Original Tenant entered into (i) a certain Lease (the “Building One Lease”) pursuant to which Original Tenant leased substantially all the space in a building adjacent to the Building, known as One Colinas Crossing, and (ii) a certain
Development Agreement (the “Development Agreement”) pursuant to the terms of which, among other things, Landlord granted to Original Tenant certain rights to lease additional space, and agreed to certain restrictions regarding the sale and
development of other tracts of land in the Colinas Crossing Office Park owned by Landlord that are more particularly referred to in the Development Agreement as the “Building 2 Site”, “Building 3 Site” and the “Building 4
Site”. The Building 2 Site is the Land; the Building 3 Site and the Building 4 Site are more particularly described in the Development Agreement. 
  
 C.    Original Tenant assigned all of its right, title and interest in the Original Lease to Tenant. Tenant is a wholly-owned
subsidiary of Original Tenant. As of February     , 2003, Landlord and Tenant amended and restated the First Amendment pursuant to a certain Amended and Restated First Amendment to Lease (the “Amended Amendment”; the
Original Lease as amended by the Amended Amendment is referred to herein as the “Lease”). Original Tenant did not assign its rights under the Development Agreement to Tenant. 
  
 D.    Tenant has vacated the Premises and Landlord and Tenant mutually desire to terminate the Lease and
the Development Agreement, all on and subject to the terms and conditions hereof. 
  
 NOW, THEREFORE, for and in consideration of the mutual covenants and promises herein contained, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties
hereto agree as follows: 

 1.    Definitions.    Except as defined herein to the
contrary, all terms utilized in this Agreement shall have the same meanings as the defined terms in the Lease. 
  
 2.    Termination Consideration.    In consideration for Landlord’s agreement to terminate the Lease
and in settlement of all future rent and obligations of Tenant under the Lease, Tenant agrees to: (A) prior to or contemporaneously with the execution and delivery of this Agreement, (i) cause Original Tenant to execute and deliver to Landlord a
promissory note (the “Note”) in the principal amount of $6,800,000.00 in the form attached hereto as Exhibit B, (ii) execute and deliver to Landlord the Bill of Sale (as defined below), and (iii) deliver to Landlord a current UCC
and lien search in the name of Tenant and Original Tenant satisfactory to Landlord (the instruments and documents referred to in clauses (i), (ii) and (iii) preceding are collectively referred to as the “Closing Documents”), and (B) pay to
Landlord cash (the “Cash Payment”) by wire transfer pursuant to the wiring instructions set forth on Exhibit C hereto, the sum of $7,597,184.50 within one business day after the date of this Agreement. 
  
 3.    Termination of the
Lease.    Landlord acknowledges receipt of the Closing Documents. Subject to Landlord’s receipt of the Cash Payment, Landlord and Tenant hereby terminate the Lease in its entirety. The termination shall become effective
automatically upon Landlord’s receipt of the Cash Payment (the date upon which the Cash Payment is received is referred to herein as the “Effective Date”). Tenant hereby surrenders the Premises to Landlord as of the Effective Date,
and Landlord accepts the Premises, “AS IS” in its present condition and without any representations or warranties of any kind except with respect to Tenant Excluded Matters or as expressly set forth in this Agreement. Landlord and Tenant
shall be relieved of all of their respective obligations to each other arising under the Lease, which accrue prior to, on or after the Effective Date effective as of the Effective Date; provided, however, (i) Tenant shall remain liable for, and the
release in Section 14.A below shall not apply to, any Tenant Excluded Matters (as defined below), and (ii) Landlord shall remain liable for, and the release in Section 14.B shall not apply to, any Landlord Excluded Matters (as defined below).
Ownership of all Tenant Improvements located in the Premises shall vest in Landlord automatically upon the termination of the Lease. 
  
 4.    No Default.    Landlord and Tenant hereby agree that (i) all rent and other sums due and payable by
Tenant under the Lease for the period prior to the Effective Date have been paid in full, and (ii) no default has occurred and is continuing under the Lease or the Development Agreement as of the Effective Date. 
  
 5.    Furniture and Personal
Property.    Attached hereto as Exhibit D is a list of furniture and other personal property (collectively, the “Listed Personal Property”) that is owned by Tenant and currently located in the Premises.
Tenant hereby agrees to convey to Landlord good title to the Listed Personal Property pursuant to a bill of sale in the form attached hereto as Exhibit E, free and clear of all encumbrances and claims of title. Landlord has made a
complete examination and inspection of the Listed Personal Property and accepts the same in its current condition, AS-IS, WHERE IS, without recourse to Tenant. Tenant makes no representations or warranties of any kind whatsoever with respect to the
Personal Property, whether implied or express, except as expressly set forth in this Paragraph 5 or in the bill of sale. All implied warranties with respect thereto, including but not limited to those of merchantability and fitness 

 
for a particular purpose, are expressly negated and waived. Tenant confirms to Landlord that it has removed all other trade fixtures and personal property
owned by Tenant, Original Tenant or any of their respective employees, located in the Premises and any trade fixtures or other property located in the Premises other than the Listed Personal Property shall be deemed to be abandoned by Tenant and may
be removed and disposed of by Landlord at such times and in such manner as Landlord determines is necessary or appropriate (which removal and disposition shall be without cost to Tenant). Tenant hereby waives and releases all claims and interests it
may have to any personal property located in or on the Premises on the date of this Agreement, including specifically, the Listed Personal Property. 
  
 6.    Removal of Tenant Signage.    Tenant covenants and agrees to remove or cause the removal of
Tenant’s logo located on the front and back of the exterior of the Building and Tenant’s name and logo (including “Two i2 Place”) located on the monument signage situated in the front of the Building and to promptly repair any
damage to the Building and/or monument signs caused by such removal. Tenant agrees to comply with its obligations under this Section within 30 days from the date of this Agreement. 
  
 7.    Installation of Switches.    Tenant covenants and agrees that on or
before May 30, 2003, Tenant shall (i) rack mount the Catalyst 5500 switches in the Premises (which switches are currently located in Building One) in the intermediate distribution frames in the Premises from which the Catalyst 6500 switches were
removed, (ii) connect power to the Catalyst 5500 switches, and (iii) power them up. On May 30, 2003, Tenant will demonstrate that the installation of the switches has occurred as provided in this Section 7 and verify the equipment inventory
associated with such switches. All of the foregoing shall be accomplished at Tenant’s sole cost and expense. 
  
 8.    No Reconciliation of Operating Expenses.    The Lease requires Tenant to pay to Landlord as
Additional Rent Tenant’s Pro Rata Share of the increase in Operating Expenses over the Base Operating Expenses. Prior to the date of this Agreement, Tenant has been paying to Landlord Tenant’s Pro Rata Share of the Estimated Operating
Expense Increase for calendar year 2003. Landlord and Tenant agree that there will be no reconciliation of the payments made by Tenant with respect to Operating Expenses for the periods prior to the date of this Agreement with respect to the actual
Operating Expenses for such periods. Each party waives and releases all claims it has or may have against the other if and to the extent the amounts paid by Tenant for its Pro Rata Share of Operating Expenses vary from the actual Operating Expenses
for all such periods. 
  
 9.    No
Adjustment of Base Rent or Tenant’s Electricity Charge.    Base Rent is payable by Tenant in advance each month and Tenant’s Electricity Charge is payable by Tenant in arrears each month. There shall be no pro
ration of Base Rent or Tenant’s Electricity Charge for the month in which the Effective Date occurs and each party waives and releases all claims it has or may have against the other to the extent the amounts paid or owed for such month do not
offset one another. 
  
 10.    No Proration
of Ad Valorem Taxes.    The Lease requires Tenant to pay to Landlord as Additional Rent the amount by which Tenant’s Pro Rata Share of ad valorem taxes 

 
assessed against the Project exceeds the Tax Stop. Prior to the date of this Agreement, Tenant has been paying to Landlord its monthly share of the Estimated
Tenant’s Tax Obligation for calendar year 2003. Landlord and Tenant agree that there will be no reconciliation of the payments made by Tenant with respect to Tenant’s Tax Obligation for calendar year 2003 or any other period prior to the
date of this Agreement. Each party waives and releases all claims it has or may have against the other if and to the extent the amounts paid by Tenant for Tenant’s Tax Obligation vary from the actual Tenant’s Tax Obligation for all such
periods. 
  
 11.    Termination of
Development Agreement.    Landlord and Original Tenant hereby terminate the Development Agreement in its entirety and agree neither party has any further obligation, one to the other, under the Development Agreement as of the
date of this Agreement. Specifically, the Building 2 Option, the Building 3 Option and the Building 4 Option (as such terms are defined in the Development Agreement) and the restrictions on sale, conveyance, development and leasing in Section 5 of
the Development Agreement are of no further force or effect as of the date of this Agreement. 
  
 12. Brokers. 
  
 A.    Tenant agrees that it has been represented by Trammell Crow Company or an affiliate of Trammell Crow Company (“Tenant’s Broker”) pursuant to a written agreement and is solely responsible for the
payment of any commission or other compensation arising out of the transactions contemplated in this Agreement. Each party to this Agreement represents and warrants to the other party that such party has had no dealings with any person, firm, agent,
or finder in connection with the negotiation of this Agreement and/or the consummation of the purchase and sale contemplated herein, other than Tenant’s Broker, and no real estate broker, agent, attorney, person, firm, or entity, other than
Tenant’s Broker, is entitled to any commission or finder’s fee in connection with this transaction as the result of any dealings or acts of such party. Each party hereby agrees to indemnify, defend, protect, and hold the other party
harmless from and against any costs, expenses, or liability for compensation, commission, fee, or charges that may be claimed by any agent, finder, or other similar party, by reason of any dealings or acts of the indemnifying party. 
  
 B.    Landlord also acknowledges that Tenant has agreed
to pay to the Staubach Company (“Staubach”) a real estate commission equal to 4.5% of the purchase price for the Premises if Landlord enters into the Haggar Contract and sells the Premises to Haggar pursuant to the Haggar Contract (the
“Staubach Commission”). Landlord confirms to Tenant that it has entered into a separate agreement with Staubach regarding the Staubach Commission and such agreement expressly provides that it supersedes the agreement with Tenant and is in
lieu of any compensation payable to Staubach by Tenant. A true and correct copy of the agreement is attached hereto as Exhibit G. 
  
 13.    Representations 
  
 A.    Landlord represents to Tenant that (i) the execution, delivery and performance of this Agreement by Landlord and all other
documents referenced herein or ancillary hereto to which it is a party and the consummation of the transactions contemplated herein by Landlord 

 
are within its partnership powers, are not in contravention of law or of the terms of its partnership agreement or any amendments thereto and have been duly
authorized by all appropriate action, (i) it has not made any assignment, transfer, conveyance or other disposition of the Lease, any interest in the Lease, the Development Agreement or any interest in the Development Agreement or any of the
Landlord Released Matters (as defined below), and (iii) it has no claim or cause of action against Tenant or Original Tenant under any indemnification or other provision of the Lease or the Development Agreement. 
  
 B.    Tenant represents to Landlord that (i) the
execution, delivery and performance of this Agreement by Tenant and all other documents referenced herein or ancillary hereto to which it is a party and the consummation of the transactions contemplated herein by Tenant are within its corporate
powers, are not in contravention of law or of the terms of its Articles of Incorporation, Bylaws or any amendments thereto and have been duly authorized by all appropriate action, (ii) it has not made any assignment, sublease (which has not been
terminated prior to the Effective Date), transfer, conveyance or other disposition of the Lease or any interest in the Lease or any of the Tenant Released Matters, (iii) it has not removed or authorized the removal of any of the Listed Personal
Property, (iv) it owns the Listed Personal Property free and clear of all liens, security interests and claims of third parties and none of the financing statements disclosed by the UCC Searches (as defined below) relate to the Listed Personal
Property, (v) it has no claim or cause of action against Landlord under any indemnification or other provision of the Lease, and (vi) the value of the obligations from which Tenant is being relieved of by virtue of the termination of the Lease and
the giving of the release in Section 14 below, exceed the value of the consideration being given by Tenant. 
  
 C.    Original Tenant represents to Landlord that (i) the execution, delivery and performance of this Agreement by Original Tenant and
all other documents referenced herein or ancillary hereto to which it is a party, including specifically, the Note, and the consummation of the transactions contemplated herein by Original Tenant are within its corporate powers, are not in
contravention of law or of the terms of its Articles of Incorporation, Bylaws or any amendments thereto and have been duly authorized by all appropriate action, (ii) it has not made any assignment, sublease, transfer, conveyance or other disposition
of the Development Agreement or any interest in the Development Agreement or any of the Tenant Released Matters, (iii) Tenant owns the Listed Personal Property free and clear of all liens, security interests and claims of third parties and none of
the financings statements disclosed by the UCC Searches relate to the Listed Personal Property, and (iv) it has no claim or cause of action against Landlord under any indemnification or other provision of the Lease or the Development Agreement.

  
 D.    Tenant and Original Tenant
acknowledge and confirm that (a) Tenant has provided to Landlord certain financing statements (the “UCC Searches”) executed by Tenant or Original Tenant that contain descriptions of property subject to security interests in favor of
creditors of Tenant or Original Tenant, (b) the descriptions of the property in the UCC Searches are, in some cases, general in nature and may include categories of personal property that are the same or similar to categories of personal property
that constitute the Listed Personal Property, and (c) the delivery of the UCC Searches is not intended and shall not be construed to adversely effect, qualify or limit Tenant’s or Original Tenant’s representations regarding the Listed
Personal Property contained in paragraphs B and C above respectively. 

 14.    Release of Claims. 
  
 A.    Landlord does hereby fully, irrevocably and
unconditionally release and discharge Tenant, Original Tenant and their respective officers, directors, shareholders, principals, predecessors, employees, agents, successors and assigns (collectively, the “Tenant Released Parties”) of and
from any and all claims, actions, cross-actions, demands, causes of action, damages, costs, expenses, losses and liabilities, lawsuits, debts, accounts, covenants, agreements, obligations and remedies, of any and every kind or nature, that arise
under or in connection with, or which relate to the Lease, the Premises and/or the Development Agreement, any transactions associated therewith, or any act, omission, event or occurrence related thereto other than Tenant Excluded Matters (the
matters so released and discharged are referred to collectively as the “Landlord Released Matters”), including without limitation, all Landlord Released Matters that are known or unknown, direct and/or indirect, existing at law or in
equity, of whatsoever kind of character, whether heretofore or hereafter accruing, asserted or unasserted, for or because of any matter or thing done, omitted, or suffered to be done by any of the Tenant Released Parties prior to, including or after
the date of the actual execution of this Agreement, INCLUDING ANY CLAIMS BASED IN WHOLE OR IN PART OF THE NEGLIGENCE OR STRICT LIABILITY OF SUCH TENANT RELEASED PARTIES. Nothing in this release is intended or shall be construed to release Tenant or
any of the Tenant Released Parties from any Tenant Excluded Matter. For the purposes of this Agreement, the term “Tenant Excluded Matter” shall mean (i) any express representation, warranty or agreement of Tenant made in this Agreement or
any of the Closing Documents, and (ii) any loss, cost or expense suffered or incurred by Landlord as a consequence of any claims made by a third party as a result of any dealings, acts or occurrences between such third party and Tenant that relate
to the Premises and arose prior to the Effective Date. 
  
 B.    Tenant and Original Tenant do hereby fully, irrevocably and unconditionally release and discharge Landlord, its partners and their officers, directors, shareholders, principals, predecessors, employees, agents,
successors and assigns (collectively, the “Landlord Released Parties”) of and from any and all claims, actions, cross-actions, demands, causes of action, damages, costs, expenses, losses and liabilities, lawsuits, debts, accounts,
covenants, agreements, obligations and remedies, of any and every kind or nature, that arise under or in connection with, or which relate to the Lease, the Premises and/or the Development Agreement, any transactions associated therewith, or any act,
omission, event or occurrence related thereto other than Landlord Excluded Matters (the matters so released and discharged are referred to collectively as the “Tenant Released Matters”), including without limitation, all Tenant Released
Matters that are known or unknown, direct and/or indirect, existing at law or in equity, of whatsoever kind of character, whether heretofore or hereafter accruing, assert or unasserted, for or because of any matter or thing done, omitted, or
suffered to be done by any of the Landlord Release parties prior to, including or after the date of the actual execution of this Agreement, INCLUDING ANY CLAIMS BASED IN WHOLE OR IN PART OF THE NEGLIGENCE OR STRICT LIABILITY OF SUCH LANDLORD
RELEASED PARTIES. Nothing in this release is intended or shall be construed to release Landlord or any of the Landlord Released Parties from any Landlord Excluded Matter. For the purposes of this Agreement, the term “Landlord Excluded
Matter” shall mean (i) any express representation or agreement of Landlord made in this Agreement or any of the Closing Documents, and (ii) any loss, cost or expense suffered or incurred by Tenant as a consequence of any claims made by a third
party as a result of any 

 
dealings or acts or occurrences between such third party and Landlord that relate to the Premises and arise after the Effective Date. 
  
 15.    Release of Memorandum of
Lease.    Concurrently with the execution and delivery of this Agreement, Landlord, Original Tenant and Tenant are executing a release of the Memorandum of Lease (the “Lease Memorandum Release”) recorded in Volume
99152, Page 01119 of the Real Property Records of Dallas County, Texas, in the form attached hereto as Exhibit H. Landlord shall cause the Lease Memorandum Release to be filed in the Real Property Records of Dallas County, Texas within 15
days after the Effective Date. 
  
 16.    Release of Memorandum of Development Agreement.    Concurrently with the execution and delivery of this Agreement, Landlord and Original Tenant are executing a release of the Memorandum
of Development Agreement (the “Development Agreement Release”) recorded in Volume 999059, Page 05504 of the Real Property Records of Dallas County, Texas, in the form attached hereto as Exhibit I. Landlord shall cause the
Development Agreement Release to be filed in the Real Property Records of Dallas County, Texas within 15 days after the Effective Date. 
  
 17.    Tenant’s Plans.    Prior to May 30, 2003, Tenant will either (i) deliver to Landlord a copy, at
Landlord’s cost and expense, of any plans and specifications in Tenant’s possession regarding the interior construction work performed by Tenant in the Premises not being removed by Tenant, or (ii) provide Landlord with the names and
addresses of persons Landlord can contact for such copies at Landlord’s cost and expense. All of such plans and specifications or information shall be delivered as-is, without warranty or representation of any kind. 
  
 18.    Whole Agreement.    The
mutual obligations of the parties as provided herein are the sole consideration for this Agreement, and no representations, promises or inducements have been made by the parties other than as appear in this Agreement. This Agreement may not be
amended except in writing signed by both parties. 
  
 19.    Building One Lease.    All of Landlord’s interest in the Building One Lease was transferred to its current owner, PW Commerce Center LP, a Texas limited partnership, an affiliate of
Landlord. Nothing in this Agreement is intended, or shall be construed, to modify, amend or otherwise affect any of the terms and provisions of the Building One Lease, all of which remain in full force and effect as of the date of this Agreement.

 20.    Miscellaneous.    The express warranties,
representations, agreements, and obligations contained in this Agreement shall survive the execution and delivery of this Agreement and the consummation of the transactions contemplated herein. This Agreement may be executed in any number of
counterparts which together shall constitute the Agreement. If any party obtains a judgment against any other party by reason of breach of this Agreement, reasonable attorneys’ fees as fixed by the court shall be included in such judgment. This
Agreement and the terms and provisions hereof shall inure to the benefit of and be binding upon the heirs, successors and assigns of the parties. This Agreement shall be construed and enforced in accordance with the laws of the state of Texas. The
parties agree that each party and its legal counsel have reviewed or have had the opportunity to review this Agreement. In the event of any conflict between the terms of the Lease and this Agreement, this Agreement shall control. 
  
 [signature page follows] 

 IN WITNESS WHEREOF, the parties have executed this Agreement as of the date first written above.

  
 LANDLORD: 
  
 COLINAS CROSSING LP, 
 a Delaware limited partnership 
  
 By:  Steven A. Means Interests, Inc., 
 a Texas corporation, a general partner 
  
 By: /s/ Steven A. Means 
 Name: Steven A. Means 
 Its: President 
  
 TENANT: 
  
 i2 TECHNOLOGIES US, INC., 
 a Nevada corporation 
  
 By: /s/ William Beecher 
 Name: William Beecher 
 Its: CFO 
  
 ORIGINAL TENANT: 
  
 i2 TECHNOLOGIES, INC., 
 a Delaware corporation 
  
 By: /s/ William Beecher 
 Name: William Beecher 
 Its: CFO 

 JOINDER OF BUILDING ONE OWNER 
  
 The undersigned joins in this Agreement for the purpose of acknowledging and agreeing to be bound by the provisions of
Section 19 of this Agreement. 
  
 PW COMMERCE
CENTER LP, 
 a Texas limited partnership 
  
 By: PW Fairview, Inc. 
        its general partner 
  
 By: /s/ F. Michael Nugent 
 Name: F. Michael Nugent 
 Title: Vice President

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