Document:

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                                                                    Exhibit 10.4

                          MANAGEMENT SERVICES AGREEMENT

                           DATED AS OF MARCH 28, 2000,

                                 BY AND BETWEEN

                                CABOT CORPORATION

                                       and

                       Cabot Microelectronics Corporation
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                                                                    Exhibit 10.4

                          MANAGEMENT SERVICES AGREEMENT

         This Management Services Agreement (this "Agreement") is executed as of
the 28th day of March, 2000 by and between Cabot Corporation, a Delaware
corporation ("Cabot"), and Cabot Microelectronics Corporation, a Delaware
corporation ("CMC"). Notwithstanding the execution date hereof, this Agreement
shall become effective upon the date of the Initial Public Offering (as defined
below).

                                    RECITALS

         WHEREAS, CMC is issuing shares of Common Stock, $.001 par value per
share ("Common Stock"), to the public in an offering registered under the
Securities Act of 1933, as amended;

         WHEREAS, Cabot has heretofore directly or indirectly provided certain
administrative, financial, management and other services to CMC and to its
predecessor, the Microelectronics Materials Division of Cabot;

         WHEREAS, on the terms and subject to the conditions set forth herein,
CMC desires to retain Cabot as an independent contractor to provide, directly or
indirectly, certain of those services to CMC after the Contribution Date (as
defined below); and

         WHEREAS, on the terms and subject to the conditions set forth herein,
Cabot desires to provide, directly or indirectly, such services to CMC.

         NOW, THEREFORE, for good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, Cabot and CMC, for themselves,
their successors and assigns, hereby agree as follows:

                                    ARTICLE I
                                   DEFINITIONS

         Section 1.01. DEFINITIONS. As used in this Agreement, the following
terms will have the following meanings, applicable both to the singular and the
plural forms of the terms described:

         "Agreement" has the meaning ascribed thereto in the preamble hereto, as
such agreement may be amended and supplemented from time to time in accordance
with its terms.

         "Cabot Entities" means Cabot and its Subsidiaries and "Cabot Entity"
shall mean any of the Cabot Entities.

         "Cabot Indemnified Person" has the meaning ascribed thereto in Section
4.01.

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         "Contribution Date" shall have the meaning ascribed thereto in the
Separation Agreement.

         "Distribution Date" means any date or dates, as the case may be,
determined by Cabot, in its sole and absolute discretion, to be a date on which
shares of CMC common stock held by Cabot are distributed in connection with the
Distribution (as defined in the Initial Public Offering and Distribution
Agreement).

         "Initial Public Offering" means the initial public offering by CMC of
shares of CMC common stock as contemplated by the IPO Registration Statement (as
defined in the Initial Public Offering and Distribution Agreement).

         "MMD Business" has the meaning ascribed to such term in the Separation
Agreement.

         "Outsourced Service" has the meaning ascribed thereto in Section 2.03.

         "Person" means any individual, partnership, limited liability company,
joint venture, corporation, trust, unincorporated organization, government (and
any department or agency thereof) or other entity.

         "Separation Agreement" means the Master Separation Agreement, of even
date herewith, among Cabot and certain of its subsidiaries and CMC pursuant to
which, among other things, the MMD Business will be separated from the business
and operations of Cabot.

         "Service Charges" has the meaning ascribed thereto in Section 3.01(c).

         "Services" has the meaning ascribed thereto in Section 2.01.

         "Subsidiary" means, as to any Person, any corporation, association,
partnership, joint venture or other business entity of which more than 50% of
the voting capital stock or other voting ownership interests is owned or
controlled directly or indirectly by such Person or by one or more of the
Subsidiaries of such Person or by a combination thereof; PROVIDED, HOWEVER, that
any reference in this Agreement to a Subsidiary or Subsidiaries of Cabot shall
not include CMC.

         Section 1.02. INTERNAL REFERENCES. Unless the context indicates
otherwise, references to Articles, Sections and paragraphs shall refer to the
corresponding articles, sections and paragraphs in this Agreement and references
to the parties shall mean the parties to this Agreement.

                                   ARTICLE II
                          PURCHASE AND SALE OF SERVICES

         Section 2.01. PURCHASE AND SALE OF SERVICES. On the terms and subject
to the conditions set forth in this Agreement and in consideration of the
Service Charges

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described below, Cabot agrees to provide to CMC, and CMC agrees to purchase from
Cabot, the services described in Schedule I (the "Services"). At its option,
Cabot may cause any Service it is required to provide hereunder to be provided
by any Cabot Entity. Unless otherwise specifically agreed by Cabot and CMC, the
Services to be provided by Cabot hereunder shall be substantially similar in
scope, quality and nature to those provided to CMC prior to the Contribution
Date and shall be performed by the same or similarly qualified personnel;
PROVIDED, HOWEVER, that the selection of personnel to perform the Services shall
be at the sole discretion of Cabot; and PROVIDED, FURTHER, that, except as
expressly provided in this Agreement, Cabot shall not be required to materially
increase the volume, scope or quality of the Services provided to CMC beyond
that which has been provided to the Microelectronics Materials Division of Cabot
prior to the Contribution Date.

         Section 2.02. ADDITIONAL SERVICES. In addition to the Services to be
provided by Cabot pursuant to Section 2.01, if requested by CMC, and to the
extent that Cabot and CMC may mutually agree in writing, Cabot shall provide
additional services (including services not provided by Cabot to the
Microelectronics Materials Division of Cabot prior to the Contribution Date) to
CMC. The scope of any such services, as well as the term, costs and other terms
and conditions applicable to such services, shall be as mutually agreed by Cabot
and CMC. Nothing herein shall create any obligation on the part of Cabot to
provide any additional services.

         Section 2.03. SERVICES PERFORMED BY THIRD PARTIES. At its option, Cabot
may cause any Service it is required to provide hereunder to be provided by any
third party that is providing, or may from time to time provide, the same or
similar services for Cabot (an "Outsourced Service"). Cabot shall remain
responsible, in accordance with the terms of this Agreement, for performance of
any Service it causes to be so provided.

         Section 2.04. IMPRACTICABILITY AND FORCE MAJEURE. Cabot shall not be
required to provide any Service to the extent the performance of such Service
becomes impracticable as a result of a cause or causes outside the control of
Cabot or to the extent the provision of such Service would require Cabot to
violate any applicable laws, rules or regulations. Cabot shall have no
obligation to perform or cause the Services to be performed if its failure to do
so is caused by or results from any act of God, governmental action, natural
disaster, strike, failure of essential equipment or any other cause or
circumstance beyond the control of Cabot or, if applicable, third party
providers of services to Cabot (an "Event of Force Majeure"). Cabot will notify
CMC of any Event of Force Majeure affecting its Services to CMC. Cabot agrees
that following any Event of Force Majeure, CMC shall have no obligation to pay
for the Services affected thereby and Cabot will use its reasonable best efforts
to restore such Services.

                                   ARTICLE III
                                 SERVICE CHARGES

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         Section 3.01. SERVICE CHARGES(a) The charge for each Service provided
to CMC hereunder directly by Cabot or any Cabot Entity shall be equal to all
costs reasonably incurred by Cabot or any Cabot Entity in providing such
Service. Such costs shall include, but are not limited to, appropriate
allocation of overhead costs, personnel costs (e.g., compensation and fringe
benefits ), travel, office costs, and incentive compensation costs associated
with functions performing such Services.

         (b) The charge for each Outsourced Service provided to CMC hereunder
shall be equal to all costs reasonably incurred by Cabot or any Cabot Entity in
providing such Outsourced Service, including, without limitation, any reasonable
third-party costs and expenses incurred by Cabot or any Cabot Entity on behalf
of CMC. If Cabot incurs third-party costs or expenses on behalf of CMC as well
as any Cabot Entity, Cabot will allocate any such costs or expenses in good
faith between CMC and the various Cabot Entities on behalf of which such costs
or expenses were incurred as Cabot shall determine in the exercise of its
reasonable judgment. Cabot shall apply usual and accepted accounting conventions
in making such allocations and Cabot or its agents shall keep and maintain such
books and records as may be reasonably necessary to make such allocations. Cabot
shall make copies of such books and records available to CMC upon request and
with reasonable notice.

         (c) The parties intend that the Service charges referred to in
paragraphs (a) and (b) above (collectively, the "Service Charges") will allow
Cabot and any Cabot Entity to recover the fully allocated costs of providing the
Services and Outsourced Services hereunder plus all out-of-pocket, third-party
costs, charges and expenses, but without any profit to Cabot or any Cabot
Entity.

         Section 3.02. INVOICING AND SETTLEMENT OF COSTS. (a) Cabot shall
invoice CMC for all Service Charges for each calendar month within thirty (30)
days following the end of such month, provided that any failure by Cabot to
provide an invoice within such time period shall not relieve CMC of its
obligation to pay an invoice received after such date. All invoices shall
reflect in reasonable detail a description of the Service performed.

         (b) Subject to Section 3.02(c) below, CMC shall pay within thirty (30)
days following its receipt of any invoice from Cabot pursuant to paragraph (a),
without set-off, all amounts invoiced by Cabot during the preceding calendar
month. If CMC fails to pay any monthly payment within sixty (60) days following
its receipt of any invoice from Cabot pursuant to paragraph (a), CMC shall pay,
in addition to the amount indicated in such invoice, interest on such amount at
the prime interest rate as published in the Wall Street Journal plus 1% per
annum compounded monthly for the period such amount remains unpaid.

         (c) In the event of a dispute as to the propriety of the amount
invoiced, CMC shall pay all undisputed amounts, but shall be entitled to
withhold payment of any amount in dispute (and shall not be obligated to pay
interest on the amount so withheld) and shall endeavor to notify Cabot within
ten (10) business days from receipt of any disputed

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invoice of the disputed amount and the reasons each such charge is disputed by
CMC, provided that the failure to so notify Cabot within such time period shall
not prevent CMC from disputing such invoice. Cabot shall provide to CMC, or
shall cause its Subsidiaries to so provide, records relating to the disputed
amount so as to enable the parties to resolve the dispute. The parties shall use
reasonable efforts to resolve any such dispute promptly.

         (d) Any invoice or payment not disputed in writing by either party
within 180 days of such invoice or payment, as the case may be, shall be
considered final and no longer subject to adjustment.

                                   ARTICLE IV
                    LIMITATION OF LIABILITY; INDEMNIFICATION

         Section 4.01. LIMITATION OF LIABILITY. CMC agrees that Cabot and each
of its Subsidiaries and their respective directors, officers, agents and
employees (each, a "Cabot Indemnified Person") shall only be liable to CMC for
or in connection with the Services rendered or to be rendered by any Cabot
Indemnified Person pursuant to this Agreement, the transactions contemplated
hereby or any Cabot Indemnified Person's actions or inactions in connection with
any such Services or transactions for claims, damages, losses, obligations,
liabilities, costs and expenses (including, without limitation, reasonable
attorneys' fees) resulting from, or arising out of, breach of contract, gross
negligence or willful misconduct on the part of any Cabot Indemnified Person.

         Section 4.02. INDEMNIFICATION OF CABOT BY CMC. CMC agrees to indemnify
and hold harmless each Cabot Indemnified Person from and against any claims,
damages, losses, obligations, liabilities, costs and expenses (including,
without limitation, reasonable attorneys' fees) arising out of or in connection
with Services rendered or to be rendered by any Cabot Indemnified Person
pursuant to this Agreement, the transactions contemplated hereby or any Cabot
Indemnified Person's actions or inactions in connection with any such Services
or transactions except for claims, damages, losses, obligations, liabilities,
costs and expenses (including, without limitation, reasonable attorneys' fees)
resulting from, or arising out of, breach of contract, gross negligence or
willful misconduct on the part of any Cabot Indemnified Person.

                                    ARTICLE V
                              TERM AND TERMINATION

         Section 5.01. TERM. (a) This Agreement shall commence on the date of
the Initial Public Offering, and shall continue until the earlier of (i) the
Distribution Date or (ii) two years after the date of the Initial Public
Offering (the "Initial Term"); provided, however, that Cabot and CMC may, by
mutual agreement, provide for the continuation of certain services after the
Distribution Date.

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         (b) Notwithstanding Section 5.02(a), the obligation of Cabot to provide
legal Services under this Agreement shall automatically terminate on the date
that Cabot ceases to own shares of Common Stock representing more than 50% of
the outstanding shares of Common Stock.

         (c) Either party may terminate this Agreement with respect to any one
or more of the Services if the other party shall have failed to perform any of
its material obligations under this Agreement relating to any such Service or
Services, the aggrieved party has notified the other party in writing of such
failure, and such failure shall have continued for a period of 30 days after
receipt by the other party of notice of such failure.

         Section 5.02. EFFECT OF TERMINATION. Other than as required by law,
upon termination of any Service pursuant to Section 5.01 or Section 5.02, Cabot
will have no further obligation to provide the terminated Service (or any
Service, in the case of termination of this Agreement) and CMC will have no
obligation to pay any fees relating to such Service or make any other payments
hereunder; PROVIDED that notwithstanding such termination, (i) CMC shall remain
liable to Cabot for fees owed and payable in respect of any Service provided
prior to the effective date of the termination and (ii) the provisions of
Articles III, V and VI shall survive any such termination.

                                   ARTICLE VI
                                  MISCELLANEOUS

         Section 6.01. PERFORMANCE UNDER ANCILLARY AGREEMENTS. Notwithstanding
anything to the contrary contained herein, CMC shall not be charged anything
under this Agreement for any Services that are specifically required to be
performed under the Separation Agreement or any other Ancillary Agreement (as
defined in the Separation Agreement) and any such other Services shall be
performed and charged for in accordance with the terms of the Separation
Agreement or such other Ancillary Agreement.

         Section 6.02. NO AGENCY. Nothing in this Agreement shall constitute or
be deemed to constitute a partnership or joint venture between the parties
hereto or constitute or be deemed to constitute any party the agent or employee
of the other party for any purpose whatsoever and neither party shall have
authority or power to bind the other or to contract in the name of, or create a
liability against, the other in any way or for any purpose.

         Section 6.03. COMPANY AS SOLE BENEFICIARY. CMC acknowledges that the
Services shall be provided only with respect to the business of CMC and its
Subsidiaries as currently operated and as currently projected to be operated or
as mutually agreed by the parties hereto. CMC shall not request performance of
any Service for the benefit of any entity other than CMC and its Subsidiaries.
CMC represents and agrees

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that CMC will use the Services only in accordance with all applicable federal,
state and local laws and regulations, and in accordance with past practices.
Cabot reserves the right to take all actions, including termination of any
particular Service, that Cabot reasonably believes to be necessary to assure
compliance with applicable laws and regulations. Cabot will notify CMC promptly
of the reasons for any such termination of Services.

         Section 6.04. ENTIRE AGREEMENT. This Agreement (including the Schedule
constituting a part of this Agreement) and any other writing signed by the
parties that specifically references this Agreement constitute the entire
agreement among the parties with respect to the subject matter hereof and
supersede all prior agreements, understandings and negotiations, both written
and oral, between the parties with respect to the subject matter hereof. This
Agreement is not intended to confer upon any Person other than the parties
hereto any rights or remedies hereunder.

         Section 6.05. INFORMATION. Subject to applicable law and privileges,
each party hereto covenants and agrees to provide the other party with all
information regarding itself and transactions under this Agreement that the
other party reasonably believes are required to comply with all applicable
federal, state, county and local laws, ordinances, regulations and codes,
including, but not limited to, securities laws and regulations.

         Section 6.06. CONFIDENTIALITY. Each of Cabot and CMC agree to keep
confidential and not disclose, and shall cause their respective subsidiaries and
affiliates to keep confidential and not disclose, to any party or use for any
purpose (other than the performance of this Agreement), any proprietary or other
confidential information of the other party which is received pursuant to this
Agreement ("Confidential Information"). Confidential Information shall be
subject to the restrictions of this paragraph only if it is marked as
confidential or proprietary or, if not disclosed in tangible form, the
disclosing party notifies the recipient of its confidential or proprietary
nature prior to its disclosure. For purposes of this Agreement, Confidential
Information of a party does not include, and a party and a party's subsidiaries
and affiliates will have no obligations under this provision with respect to,
any information of the other party or any subsidiary or affiliate of the other
party (the other party and subsidiaries and affiliates of the other party being
referred to as the "receiving party") which:

         (i) is already known to the receiving party from a source other than
the disclosing party as evidenced by competent proof thereof; or

         (ii) is or becomes publicly known through no wrongful act of the
receiving party (in which event the receiving party's obligations under this
Agreement in respect thereto shall terminate on the date such information enters
the public domain); or

         (iii) is rightfully received by the receiving party from a third party
without violation of any obligations of confidentiality owed by the third party
to the disclosing party; or

         (iv) is disclosed by the disclosing party to a third party without
restrictions on the third party's right to use or disclose such information; or

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         (v) is independently developed by employees or consultants of the
receiving party without use of or reference to the disclosing party's
Confidential Information; or

         (vi) is approved for release by written authorization of the disclosing
party

         Section 6.07. PROTECTIVE ARRANGEMENTS. In the event that any party
hereto (or any of its Subsidiaries) either determines on the advice of its
counsel that it is required to disclose any information pursuant to applicable
law or receives any demand under lawful process or from any governmental
department, commission, board, bureau, agency or official to disclose or provide
information of any other party hereto (or any of its Subsidiaries) that is
subject to the confidentiality provisions hereof, such party shall notify the
other party prior to disclosing or providing such information and shall
cooperate at the expense of the requesting party in seeking any reasonable
protective arrangements requested by such other party. Subject to the foregoing,
the party that received such request may thereafter disclose or provide
information to the extent required by such law (as so advised by counsel) or by
lawful process or such governmental department, commission, board, bureau,
agency or official.

         Section 6.08. NOTICES. Any notice, instruction, direction or demand
under the terms of this Agreement required to be in writing will be duly given
upon delivery, if delivered by hand, facsimile transmission, intercompany mail,
or mail, to the following addresses:

         (a)      If to Cabot, to:

                  Cabot Corporation
                  75 State Street
                  Boston, Massachusetts  02109

                  Attention: Paul Zack
                  Telecopy No.:617-342-6303

         (b)      If to CMC, to:

                  Cabot Microelectronics Corporation
                  870 North Commons Drive
                  Aurora, Illinois  60504

                  Attention: Daniel Wobby
                  Telecopy No.:630-375-5593

or to such other addresses or telecopy numbers as may be specified by like
notice to the other parties.

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         Section 6.08. GOVERNING LAW. This Agreement shall be construed in
accordance with and governed by the substantive internal laws of the State of
Delaware.

         Section 6.09. SEVERABILITY. If any provision of this Agreement shall be
invalid or unenforceable, such invalidity or unenforceability shall not render
the entire Agreement invalid. Rather, the Agreement shall be construed as if not
containing the particular invalid or unenforceable provision, and the rights and
obligations of each party shall be construed and enforced accordingly.

         Section 6.10. AMENDMENT. This Agreement may only be amended by a
written agreement executed by both parties hereto.

         Section 6.11. COUNTERPARTS. This Agreement may be executed in separate
counterparts.

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         IN WITNESS WHEREOF, the parties have caused this Agreement to be signed
by their duly authorized representatives.

                               CABOT CORPORATION

                               By:   /s/ Samuel W. Bodman
                                   ---------------------------------------------
                                    Name: Samuel W. Bodman
                                    Title:  Chairman and Chief Executive Officer

                       CABOT MICROELECTRONICS CORPORATION

                               By:   /s/ Matthew Neville
                                   ---------------------------------------------
                                    Name: Matthew Neville
                                    Title: President

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                                                                      SCHEDULE I

                           Cabot Corporation ("Cabot")
                   Cabot Microelectronics Corporation ("CMC")

                               MANAGEMENT SERVICES
                                    POST IPO

<TABLE>
<CAPTION>
--------------------------------------------------------------------------------
   SERVICE
    AREA                                  DESCRIPTION
--------------------------------------------------------------------------------
<S>                  <C>
Corporate            Continue to provide general corporate affairs services
Affairs              commensurate with past efforts
--------------------------------------------------------------------------------
SH&E                 Product Stewardship:  MSDS development; product regulatory
                     status determination; product notification/product
                     registration; product toxicological determination; support
                     during transition to new CMC.  Cabot Corporate SHE
                     Compliance Assurance Reviews. SH&E policies and
                     procedures, technical guidance.  Safety, Industrial
                     Hygiene Process Safety Management.
--------------------------------------------------------------------------------
Information          Planning: Requirements definition, architecture & software
Services             acquisition, infrastructure design & vendor selection,
                     contract negotiation support, and implementation. Establish
                     spin-off environment (up to 1.25 FTE's): Applications;
                     integrator selection, co-lead project, participate in
                     CRP's, data bridging, technical support, Infrastructure;
                     support implementation, data design, project plan review,
                     vendor management.
--------------------------------------------------------------------------------
Legal                Continue to provide general corporate, intellectual
                     property, and legal management services commensurate with
                     past efforts..
--------------------------------------------------------------------------------
Human                Continue to provide general human resources commensurate
Resources            with past efforts. Assistance setting up all CMC benefit
                     plans.
--------------------------------------------------------------------------------
Finance              Continue to provide general finance services commensurate
                     with past efforts.
--------------------------------------------------------------------------------
Investor             Communication of CMC's strategy and performance to
Relations            investor community.
--------------------------------------------------------------------------------
Tax                  Continue to provide general tax services commensurate with
                     past efforts.
--------------------------------------------------------------------------------
Treasury             Provide advice on other treasury-related issues (FX mgmt,
                     leasing, letters of credit, investments/pension, bank
                     relationships). Put in place cash mgmt structure and
                     systems (collection & disbursements).  Open
</TABLE>

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<TABLE>
<S>                  <C>
                     bank accounts in the U.S. and abroad. Negotiate and put in
                     place credit agreements with banks.
--------------------------------------------------------------------------------
Controller           Cabot Corp. compliance reporting (government and SEC
                     filings, debt covenants). Accounting policies and
                     procedures, U.S. GAAP, and technical accounting guidance.
                     Ad hoc SEC reporting guidance. Coordination of Cabot & CMC
                     earnings release and SEC filings.
--------------------------------------------------------------------------------
Insurance            Management and allocation of corporate insurance to CMC,
                     including but not limited to, excess liability, general
                     liability, workers comp, fire & business interruption,
                     auto, and aircraft insurance premiums.
--------------------------------------------------------------------------------
</TABLE>

                                      -13-<PAGE>   1

                                                                    Exhibit 10.5

The omitted portions indicated by brackets have been separately filed with the
Securities and Exchange Commission pursuant to a request for confidential
treatment under Rule 406, promulgated under the Securities Act of 1933, as
amended.

                       FUMED METAL OXIDE SUPPLY AGREEMENT

       This FUMED METAL OXIDE SUPPLY AGREEMENT (this "Agreement"), executed this
20th day of January, 2000, is between Cabot Corporation ("Cabot"), a Delaware
corporation, and Cabot Microelectronics Corporation ("CMC"), a Delaware
corporation. Notwithstanding the execution date hereof, this Agreement shall
become effective upon the date of the initial public offering by CMC of shares
of CMC common stock.

       WHEREAS, Cabot and certain of its subsidiaries and CMC will be parties to
a Master Separation Agreement, (the "Master Separation Agreement"), which will
provide, in part, for the separation from Cabot, of the business, assets and
liabilities of the Microelectronics Materials Division of Cabot (the "MMD
Business") and the transfer of the MMD Business to CMC;

       WHEREAS, in the past, the Microelectronics Materials Division of Cabot
has purchased various fumed metal oxide products from Cabot;

       WHEREAS, CMC desires to have Cabot provide to CMC certain fumed metal
oxide products after the separation of the MMD Business; and

       WHEREAS, Cabot desires to provide such fumed metal oxides to CMC after
the separation of the MMD Business;

       NOW, THEREFORE, in consideration of the foregoing premises and other good
and valuable consideration, the receipt and sufficiency of which is hereby
acknowledged, the parties hereby agree as follows:

SECTION 1.        TERM

       This Agreement shall commence on the date of the initial public offering
by CMC of shares of CMC common stock, and shall continue until June 30, 2005
(the "Initial Term"). Unless either party shall give a notice of nonrenewal
prior to December 31, 2003, this Agreement shall continue after the Initial Term
until terminated by either party by a written notice of termination, which shall
terminate this Agreement effective on the first June 30 or December 31 more than
18 months after the date such notice is delivered. The Initial Term, together
with any continuations, are referred to herein as the "Term". Each year of the
Term beginning on the effective date or an anniversary thereof is referred to
herein as a "Term Year", including the stub period, if any, between the last
anniversary of the effective date and the end of the Term.

<PAGE>   2

SECTION 2.        PRODUCTS

      2.1   Purchase and Sale.

      (a) Subject to the terms and conditions of this Agreement, during the
Term, Cabot shall provide to CMC, and CMC shall purchase from Cabot, the
Products (as defined below) in such quantities as specified by CMC, subject to
Sections 2.3 through 2.5 below. "Products" means:

      (i)   the fumed silica of the types set forth on Schedule A hereto (the
            "Fumed Silica"), which shall conform to the specifications, formulae
            and processes set forth on Schedule A hereto; and

      (ii)  the fumed alumina of the types set forth on Schedule B hereto (the
            "Fumed Alumina" and together with the Fumed Silica, the "Fumed Metal
            Oxides"), which shall conform to the specifications, formulae and
            processes set forth on Schedule B hereto.

      (b) Any amendment to Schedule A or Schedule B shall require the consent of
both CMC and Cabot. Unless otherwise agreed to by Cabot, any increase in costs
incurred by Cabot in manufacturing Products to comply with changes requested by
CMC to the specifications as set forth on Schedule A or Schedule B shall be paid
by CMC.

      2.2 Forecasts.

      CMC shall provide Cabot with forecasts (the "Forecasts") of the quantities
of Fumed Metal Oxides that CMC expects to purchase from Cabot (the "Forecasted
Quantities"). The Forecasts shall identify by grade, the Forecasted Quantities
and the Cabot facility or facilities that will produce and deliver to CMC such
Forecasted Quantities (including the volume to be made at each plant). CMC shall
provide the following Forecasts to Cabot:

     (a) not more than sixty (60) but not less than thirty (30) days prior to
each January 1, April 1, July 1 and October 1 during the Term, a Forecast
indicating the Forecasted Quantity for each month of the calendar quarter
commencing on such January 1, April 1, July 1 and October 1 (the "Quarterly
Forecast"); provided, however, that in such Quarterly Forecast, the Forecasted
Quantity for any month may not exceed the Forecasted Quantity for the previous
month by more than 20%;

     (b) not more than sixty (60) but not less than thirty (30) days prior to
each July 1 and January 1 during the Term, a semi-annual Forecast indicating the
Forecasted Quantity for the six (6) month period commencing on such July 1 and
January 1 (the "Six Month Forecast");

                                      -2-
<PAGE>   3

        (c) not more than sixty (60) but not less than thirty (30) days prior to
each July 1, a one (1) year Forecast indicating the Forecasted Quantity for the
calendar year commencing on the following July 1 (the "Annual Forecast"); and

        (d) on or around each July 1, an eighteen (18) month Forecast indicating
the Forecasted Quantity for the eighteen month period commencing on the
following July 1 (the "18 Month Forecast"); provided, however, that CMC shall
provide Cabot with a revised eighteen (18) Month Forecast for the remainder of
the eighteen (18) month period covered by the last 18 Month Forecast as soon
reasonably practicable after CMC becomes aware of any material changes to such
18 Month Forecast.

        For the purposes of this Agreement, Forecasts delivered by CMC to Cabot
after the execution hereof shall, upon the effectiveness of this Agreement, be
deemed to have been delivered hereunder.

        With respect to planned shutdowns of Cabot's manufacturing facilities,
the parties shall work together and cooperate with each other regarding
necessary adjustments to forecasts and delivery schedules hereunder.

      2.3   Cabot's Maximum Supply Obligations.

      (a) The obligation of Cabot to supply Products to CMC under this Agreement
shall be subject to each of the following maximum monthly volume limitations:

     (i) the maximum monthly volume of Fumed Silica from Cabot's Tuscola,
         Illinois facility (the "Tuscola Plant") shall be [ ] pounds per month;

     (ii)the maximum monthly volume of Fumed Alumina from Cabot's Tuscola,
         Illinois pilot facility (the "Tuscola Pilot Plant") shall be [ ] pounds
         per month; and

     (iii) the maximum monthly volume of Fumed Silica from Cabot's Barry, Wales
         facility (the "Barry Plant") shall be [ ] pounds per month.

     In clarification of the above, any volumes of Fumed Silica and/or Fumed
     Alumina supplied by Cabot under the Dispersions Services Agreement, of even
     date herewith, shall not be considered in calculating the maximum volumes
     of Fumed Silica and/or Fumed Alumina Cabot is obligated to supply
     hereunder.

      (b) In addition to the volume limitations set forth in 2.3(a) above, in
the event that CMC orders volumes of fumed silica from Cabot in excess of
Forecasted Quantities, Cabot shall not be obligated to supply to CMC such
Products in excess of the following volumes:

                                      -3-
<PAGE>   4

      (i)   for any calendar quarter and any plant, [ ]% of the volumes of Fumed
            Silica for such plant set forth in CMC's Quarterly Forecast;

      (ii)  for any calendar half year (beginning on or after July 1, 2000) and
            for any plant, [ ]% of the volumes of Fumed Silica for such plant
            set forth in CMC's Sixth Month Forecast; and

      (iii) for any year beginning July 1 and for any plant, [ ]% of the volumes
            of Fumed Silica for such plant set forth in CMC's Annual Forecast.

      (c) The maximum supply obligations set forth in Sections 2.3 (a) and (b)
are referred to herein as the "Maximum Volumes". If CMC shall request volumes of
Fumed Silica or Fumed Alumina in excess of the Maximum Volumes described above,
Cabot shall use commercially reasonable efforts to supply such volumes ("Excess
Volumes"); provided that Cabot shall not be obligated to breach its contractual
obligations with other customers or to take any actions which it deems
detrimental to its business, in order to supply CMC with Excess Volumes.

      2.4 Minimum Volumes. CMC shall be obligated to purchase from Cabot during
each six month period covered by a Six Month Forecast a "Minimum Volume,"
meaning at least 90% of the aggregate volumes of Fumed Silica forecasted to be
purchased by CMC as set forth in each Six Month Forecast. Cabot and CMC
recognize that damages for CMC's failure to purchase Minimum Volumes would be
difficult to ascertain and prove. Cabot and CMC agree that if, during any six
month period CMC fails to purchase from Cabot the Minimum Volume of Fumed Silica
for such six month period, CMC shall pay to Cabot liquidated damages in an
amount equal to the product obtained by multiplying (i) the difference (in
pounds) between (x) the applicable Minimum Volume and (y) the amount of Fumed
Silica actually purchased by CMC during the relevant six month period times (ii)
$[ ]. Cabot and CMC agree that such liquidated damages are the sole and
exclusive remedy for CMC's failure to purchase Minimum Volumes. Cabot and CMC
further agree that such liquidated damages represent a reasonable estimate of
Cabot's damages and do not constitute a penalty.

      2.5 Exclusivity; Exception Thereto.

       (a) CMC shall purchase from Cabot all of the Fumed Metal Oxides necessary
to produce the products produced by CMC on the effective date of this Agreement.
With respect to products developed and produced by CMC after the effective date
of this Agreement, CMC shall not be obligated to purchase from Cabot any of the
Fumed Metal Oxides necessary to produce such products.

       (b) During the Term of this Agreement, Cabot shall not knowingly, without
CMC's prior written consent, directly or indirectly, sell any Fumed Metal Oxides
to any

                                      -4-
<PAGE>   5

person or entity other than CMC for use in the production of any goods or
products that compete with any CMP (chemical mechanical polishing) consumable
goods and products produced by CMC.

       (c) In the event CMC requests a change to a Product specification, which
change is necessary in order to achieve a material performance difference in
CMC's end product, and Cabot is not able or is unwilling to modify such Product,
CMC shall have the right to obtain such modified product from any third party,
subject to any intellectual property rights Cabot may have.

       (d) Notwithstanding Section 2.5(a) above, in the event that Cabot fails
to supply CMC with its requirements for Products for any reason, CMC shall have
the right to obtain such Products from any third party, subject to any
intellectual property rights Cabot may have.

SECTION 3.        PRICING

      3.1 Prices. Cabot shall sell the Products to CMC in accordance with the
following prices (the "Prices"):

      (a)   Fumed Silica Price.

            The price for Fumed Silica shall be equal to the Base Price (as
defined below) plus the Feedstock Adjustment (as defined below). The price of
Fumed Silica to be purchased shall be determined by the date the order therefor
is placed with Cabot, with respect to all volumes specified therein to be
delivered within 90 days after the date such order is placed, and by the date
specified for delivery, with respect to all volumes specified for delivery
thereafter.

            The "Base Price" shall be $[ ] per pound during the first Term Year.
The Base Price shall increase by $[ ] per pound for each subsequent Term Year,
to be effective commencing on the first day of each subsequent Term Year.

      The "Feedstock Adjustment" shall be calculated and applied every six (6)
months and is obtained by (i) calculating the difference between the New
Feedstock Cost per pound of fumed silica manufactured (as defined below) and the
Starting Feedstock Cost per pound of fumed silica manufactured (as defined
below) and (ii) dividing this difference by a yield factor of [ ], provided that
if the New Feedstock Cost is less than the Starting Feedstock Cost, the
Feedstock Adjustment shall be zero. The Feedstock Adjustment shall be calculated
and provided to CMC prior to each July1 and January 1 with respect to the
following six (6) month period and shall be based on CMC's Six Month Forecast
for such period as well as the historical feedstock cost information for the
most recent six month period ended May 31 (in the case of the July 1 adjustment)
and

                                      -5-
<PAGE>   6

November 30 (in the case of the January 1 adjustment).

            The "New Feedstock Cost" shall be derived from the following
formula:

            New Feedstock Cost = [     ]

                  Where:

                  A = pounds of fumed silica forecasted to be purchased by CMC
                  in the upcoming Six Month Forecast from the Tuscola plant.
                  B = pounds of fumed silica forecasted to be purchased by
                  CMC in the upcoming Six Month Forecast from the Barry plant.
                  C = Total "Delivered Cost" of all [ ] (other than [ ] used
                  in [ ] manufacturing) consumed in the manufacture of fumed
                  silica at the Tuscola plant during the applicable six (6)
                  month period divided by the total number of pounds of fumed
                  silica produced at the Tuscola plant (other than [ ] which was
                  toll manufactured), including off-quality material. As used
                  herein, the "Delivered Cost" of [ ] means the purchase price
                  paid by Cabot for such [ ], including transportation costs and
                  applicable sales and use taxes as well as price adjustments
                  related solely to the [ ], and excluding [ ] adjustments or
                  credits and handling costs, labor and depreciation.
                  D = Total "Delivered Cost" of all [ ] (other than [ ] used in
                  [ ] manufacturing) consumed in the manufacture of fumed
                  silica at the Barry plant during the applicable six (6) month
                  period divided by the total number of pounds of fumed silica
                  produced at the Barry plant (other than [ ] which was toll
                  manufactured), including off-quality material.

            The "Starting Feedstock Cost" shall equal the total "Delivered Cost"
of all [ ] (other than [ ] used in [ ] manufacturing) consumed at the Tuscola
and Barry plant during the six (6) month period ended November 30, 1999 divided
by the total number of pounds of fumed silica produced at the Tuscola and Barry
plant (other than [ ] which was toll manufactured), including off-quality
material, during such period.

            CMC shall have the right to have a recognized accounting firm audit
the books and records of Cabot necessary to verify the Feedstock Adjustment
provided above. Such accounting firm shall be obligated to keep any information
obtained during the audit of Cabot's books and records confidential and may
confirm to CMC only

                                      -6-
<PAGE>   7

whether, and to what extent, Cabot's calculations of the Feedstock Adjustment
deviate from the calculation of such accounting firm.

      (b) Excess Volumes of Fumed Silica. The price for Excess Volumes of Fumed
Silica shall be as follows:

            (1) Subject to Section 2.3(c) above, if Cabot has the production
capacity to produce the Excess Volumes of Fumed Silica at the times and in the
volumes requested by CMC without interfering with its supply of products for
other customers, Cabot shall produce such Excess Volumes and sell them to CMC at
the prices set forth in Section 3.1(a) hereof.

            (2) Subject to Section 2.3(c) above, if Cabot would be required to
displace volumes intended for other customers, otherwise interfere with its
supply of products to other customers or obtain Products from other sources in
order to meet a request of CMC in respect of Excess Volumes of Fumed Silica, the
price for such Excess Volumes shall be determined by Cabot, provided that such
price shall not exceed [ ].

      (c)   Fumed Alumina Price.

      Until Cabot shall begin commercial scale production of fumed alumina, the
price for fumed alumina shall be equal to $[ ] per pound. For purposes of this
agreement, "commercial scale production of fumed alumina" shall mean Cabot
having a fumed alumina production unit capable of producing fumed alumina at a
production rate greater than [ ] pounds per year. Upon commencement by Cabot of
such commercial scale production of fumed alumina, Cabot and CMC shall
renegotiate the price per pound of Fumed Alumina.

      (d) In addition to the above described purchase prices for the fumed metal
oxides, MMD shall reimburse Cabot for all reasonable costs incurred by Cabot in
conducting analytical services requested by CMC for [ ].

      3.2 Cost Savings. Cabot and CMC acknowledge that it is their intention to
decrease the costs associated with manufacturing the Products, and to share any
cost savings resulting from joint efforts equally between them (other than cost
savings with respect to packaging, which the parties agree shall not be passed
on to CMC). Cabot and CMC agree to discuss, from time to time, ways to jointly
decrease such costs.

SECTION 4.        ORDERS, SHIPPING, DELIVERY AND PAYMENT

      (a) Orders for Products shall be issued by CMC from time to time. Each
order shall specify the date(s) the products are to be delivered, which date(s)
shall be not less than ten (10) business days prior to the date the order is
received by Cabot. For purposes

                                      -7-
<PAGE>   8

of applying 2.3 and 2.4 only, each volume of Product shall be deemed to be in
the month specified for its shipment in CMC's order; and if no date is
specified, then in the month following the month in which the order therefor is
issued by CMC.

      (b) All sales of Products under this agreement are made F.O.B. Cabot's
point of shipment. CMC shall be responsible for all transportation costs and
title and risk of loss shall pass to CMC upon delivery to carrier.

      (c) All Products shall be prepared by Cabot for delivery to CMC, as the
case may be, including the necessary dunnage, to prevent damage during the
normal course of transportation.

      (d) Cabot shall invoice CMC for the Products delivered to CMC during each
month by the fifteenth (15th) calendar day of the following month. Cabot shall
deliver such invoices to CMC by regular U.S. mail, or other methods such as
express U.S. mail, overnight courier or other means, if mutually acceptable.

      (e) CMC shall pay each such invoice within fifteen (15) calendar days of
receipt thereof. Such payment shall be made by check or wire transfer in readily
available same day or next day funds denominated in United States dollars. If
payment is to be made by wire transfer, CMC shall request and Cabot shall
provide to CMC, wire transfer instructions.

SECTION 5.        WARRANTIES

      5.1 Warranty as to Products. Cabot represents and warrants to CMC that,
when shipped to CMC, the Products will conform in all respects to the
specifications then in effect and as then set forth in the materials specified
on Schedule A and Schedule B hereto. CABOT MAKES NO OTHER REPRESENTATION OR
WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, AS TO MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE OR ANY OTHER MATTER WITH RESPECT TO THE PRODUCTS, WHETHER
USED ALONE OR IN COMBINATION WITH OTHER SUBSTANCES, EVEN IF THE PURPOSES OR USES
OF SUCH PRODUCTS ARE KNOWN BY CABOT.

      5.2 Remedies. If any Products do not conform in all respects to the
specifications then in effect and as then set forth on Schedule A and Schedule B
hereto, Cabot agrees to replace such Products with Products that conform to such
specifications. Subject to the following sentence, CMC shall not be obligated to
accept or pay for Products that do not conform to the specifications then in
effect for such Products. If any such non-conformity is the result of materials,
process specifications or formulae provided by CMC to Cabot, CMC shall pay Cabot
for the Products and such volumes

                                      -8-
<PAGE>   9

shall be included in determining the volumes of Products delivered by Cabot to
CMC hereunder. IN NO EVENT SHALL CABOT BE RESPONSIBLE OR LIABLE FOR ANY SPECIAL,
INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING AS A RESULT OF ANY BREACH OF
WARRANTY IN RESPECT OF ANY PRODUCTS UNDER THIS AGREEMENT OR THE TRANSACTIONS
CONTEMPLATED HEREBY.

SECTION 6.        CONSENTS; NOTICES

      Unless otherwise set forth herein, whenever any notice, consent or
approval is to be given in this Agreement, it must be in writing and delivered
in accordance with the provisions of this Section 6. Any such writing will be
duly given upon delivery, if delivered by hand, facsimile transmission or mail,
to the following addresses:

      If to Cabot:            Cabot Corporation
                              Business and Technical Center
                              Billerica, MA 01821
                              Attn: Fumed Metal Oxide Product Line Manager
                              Telecopier:

                        With a copy to:

                              Cabot Corporation
                              75 State Street
                              Boston, MA 02109
                              Attn: Law Department
                              Telecopier: 617-342-6039

      If to CMC:              Cabot Microelectronics Corporation
                              870 North Commons Drive
                              Aurora, IL 60504
                              Attn:  Vice President of Operations
                              Telecopier:  630-375-5596

or to such other address as may be designated in writing by any of the parties
from time to time in accordance herewith.

SECTION 7.        GENERAL

      7.1 Severability. If any provision of this Agreement shall be found to be
invalid or unenforceable, then such provision or provisions shall not invalidate
or in any way affect the enforceability of the remainder of this Agreement and
such provision or

                                      -9-
<PAGE>   10

provisions shall be curtailed and limited to the extent necessary to bring the
Agreement within any legal requirement and the parties shall negotiate in good
faith with respect to an equitable modification of the provision or application
thereof held to be invalid.

      7.2 Modification; Waivers. Except as expressly provided herein, this
Agreement may be modified or amended only with the written consent of each party
hereto. Neither party hereto shall be released from its obligations hereunder
without the written consent of the other party. The observance of any term of
this Agreement may be waived (either generally or in a particular instance and
either retroactively or prospectively) by the party entitled to enforce such
term, but any such waiver shall be effective only if in a writing signed by the
party against which such waiver is to be asserted. Except as otherwise
specifically provided herein, no delay on the part of either party hereto in
exercising any right, power or privilege hereunder shall operate as a waiver
thereof, nor shall any waiver on the part of either party hereto of any right,
power or privilege hereunder operate as a waiver of any other right, power or
privilege hereunder nor shall any single or partial exercise of any right, power
or privilege hereunder preclude any other or further exercise thereof or the
exercise of any other right, power or privilege hereunder.

      7.3 Succession. This Agreement shall be binding upon and shall inure to
the benefit of the parties hereto and their respective successors and other
legal representatives and, to the extent that any assignment hereof is permitted
hereunder, their assignees.

      7.4 Counterparts. This Agreement may be executed in counterparts.

      7.5 Further Assurances. Each party agrees to provide any additional
documents and take any such further action as may be reasonably requested by the
other party in order to carry out the purpose and intent of this Agreement.

      7.6 Entire Agreement. This Agreement contains the full and complete
undertaking and agreement between the parties hereto with respect to the sale of
fumed silica and fumed alumina by Cabot to CMC, and supersedes all other
agreements between Cabot and CMC, whether written or oral, except any
confidentiality agreements between the parties, which shall, to the extent such
agreements do not contradict the terms of this Agreement, continue in effect.

      7.7 Headings. The headings of the sections and other subdivisions of this
Agreement are for convenient reference only. They shall not be used in any way
to govern, limit, modify, construe this Agreement or any part or provision
thereof nor otherwise be given any legal effect.

      7.8 Assignees and Third Parties. This Agreement may not be assigned by
either party without the prior written consent of the other party and any
attempted

                                      -10-
<PAGE>   11

assignment without such consent shall be null and void; provided, however, that
Cabot may assign this Agreement to a subsidiary or affiliated company. In
addition, Cabot may make arrangements for the production and sale of Products
required hereunder to be manufactured and sold by a subsidiary or an affiliate,
including but not limited to Cabot Carbon Ltd. Such arrangements may take the
form of an assignment of certain rights and obligations hereunder or a
subcontract of certain obligations hereunder. Similarly, CMC may make
arrangements for the purchase of Products hereunder to be made by a subsidiary,
including but not limited to Cabot Microelectronics International Corporation.
Such arrangements may take the form of an assignment of certain rights and
obligations hereunder. However, all sales of Products pursuant to any such
arrangement shall be governed by the terms of this Agreement.

      7.9 Governing Law. This Agreement shall be governed by and construed and
enforced in accordance with the laws of Delaware, without giving effect to
principles of conflicts or choice of laws of Delaware or of any other
jurisdiction.

      7.10 Force Majeure. Each of the parties hereto shall be excused from
delays in performing or from failure to perform hereunder to the extent that
such delays or failures result from causes beyond the reasonable control of such
party, including, but not limited to, forces of nature, acts of God, strikes,
lockouts, wars, blockades, insurrections, riots, epidemics, restraints or
requirements of any government or government agency, civil disturbances,
explosions, breakage or accident to machinery or lines of pipe, unavailability
of raw material or supplies, strandings, perils of the sea, the binding order of
any court or governmental authority which has been resisted in good faith by all
reasonable means, and other cause, whether of the kind enumerated or otherwise,
not reasonably within the control of the party claiming suspension. Failure to
prevent or settle any strike shall not be considered to be a matter within the
control of the party claiming suspension. However, in order to be excused from
delay or failure to perform, such party must act diligently to remedy the cause
of such delay or failure.

      7.11 Confidentiality. Each of Cabot and CMC agree to keep confidential and
not disclose, and shall cause their respective subsidiaries and affiliates to
keep confidential and not disclose, to any party or use for any purpose (other
than the performance of this Agreement), any proprietary or other confidential
information of the other party which is received pursuant to this Agreement
("Confidential Information"). Confidential Information shall be subject to the
restrictions of this paragraph only if it is marked as confidential or
proprietary or, if not disclosed in tangible form, the disclosing party notifies
the recipient of its confidential or proprietary nature prior to its disclosure.
For purposes of this Agreement, Confidential Information of a party does not
include, and a party and a party's subsidiaries and affiliates will have no
obligations under this provision with respect to, any information of the other
party or any subsidiary or affiliate of the other party (the other party and
subsidiaries and affiliates of the other party being referred

                                      -11-
<PAGE>   12

to as the "receiving party") which:

      (i) is already known to the receiving party from a source other than the
disclosing party as evidenced by competent proof thereof; or

      (ii) is or becomes publicly known through no wrongful act of the receiving
party (in which event the receiving party's obligations under this Agreement in
respect thereto shall terminate on the date such information enters the public
domain); or

      (iii) is rightfully received by the receiving party from a third party
without violation of any obligations of confidentiality owed by the third party
to the disclosing party; or

      (iv) is disclosed by the disclosing party to a third party without
restrictions on the third party's right to use or disclose such information; or

      (v) is independently developed by employees or consultants of the
receiving party without use of or reference to the disclosing party's
Confidential Information; or

      (vi) is approved for release by written authorization of the disclosing
party

      7.12 Independent Contractors. CMC and Cabot are each independent
contractors. Nothing herein contained shall be construed to place CMC and Cabot
in the relationship of principal and agent, master and servant, partners, or
joint venturers, and, except as otherwise set forth in this Agreement, neither
party shall have, expressly or by implication, the power to represent itself as
having any authority to make contracts in the name of or binding upon the other,
or to obligate or bind the other in any manner whatsoever.

      7.13 Resale Prohibition. The parties intend and agree that the fumed
silica and fumed alumina being sold hereunder to CMC is being sold solely for
the use by CMC and its subsidiaries in manufacturing their products.
Accordingly, CMC and its subsidiaries are prohibited from reselling any fumed
silica or fumed alumina purchased hereunder. However, in the event CMC
determines, in good faith, that the fumed metal oxides supplied hereunder, which
otherwise meet the specification set forth in Scheduled A or B, but which are
not fit for CMC's use in the manufacture of CMP slurries, CMC shall have the
right to resell such fumed metal oxides, provided, CMC first offers Cabot the
option to purchase such fumed metal oxides back from CMC at a price which is the
lower of (i) the price paid by CMC to Cabot for such material, or (ii) the price
at which CMC will resell such material.

                                      -12-
<PAGE>   13

      IN WITNESS WHEREOF, the parties hereto have executed this Agreement as a
sealed instrument and have delivered this Agreement as of the day and year first
above written.

                                     CABOT CORPORATION

                                     By:    /s/  Samuel W. Bodman
                                        --------------------------------------
                                        Name:  Samuel W. Bodman
                                        Title: Chief Executive Officer

                                     CABOT MICROLELECTRONICS CORPORATION

                                     By:     /s/ Matthew Neville
                                        --------------------------------------
                                        Name:  Matthew Neville
                                        Title: President and
                                               Chief Executive Officer

                                      -13-
<PAGE>   14

                                   Schedule A

                           Fumed Silica Specifications

Product                       Specification

[     ]                             [     ]

[     ]                             [     ]

[     ]                             [     ]

                                      -14-
<PAGE>   15

                                   Schedule B

                          Fumed Alumina Specifications

Product                       Specification

[     ]                             [     ]

                                      -15-

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