Document:

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                                                                   EXHIBIT 10.1

                               SEVERANCE AGREEMENT

        THIS AGREEMENT is entered into as of March 26, 2001, by and between
___________ (the "Employee") and MICROCIDE PHARMACEUTICALS, INC., a Delaware
corporation (the "Company").

        1. Term of Agreement.

        This Agreement shall remain in effect from the date hereof until the
earlier of:

           (a) The date when the Employee's employment with the Company
terminates for any reason not described in Section 6; or

           (b) The date when the Company has met all of its obligations under
this Agreement following a Termination Event, as defined in Section 6, below.

        2. Definition of Change in Control.

        For all purposes under this Agreement, "Change in Control" shall mean
(i) a merger, reorganization or other transaction or series of related
transactions (other than financings) following which the shareholders of the
Company do not own a majority of the capital stock of the surviving corporation
or (ii) the sale of all or substantially all of the assets of the Company.

        3. Definition of Good Reason.

        For all purposes under this Agreement, "Good Reason" shall mean that the
Employee:

           (a) Has been demoted or has incurred a material reduction in his
authority or responsibility as an employee of the Company, including (without
limitation) a reduction or elimination of his authority to approve expenditures
or to hire, promote, demote or terminate subordinates;

           (b) Has incurred a reduction in his total compensation (including
benefits) as an employee of the Company, other than pursuant to a Company-wide
reduction of total compensation (including benefits) for employees of the
Company generally;

           (c) Has not received a contemporaneous increase in his total
compensation (including benefits) which is commensurate with increases in total
compensation (including benefits) received by a majority of executive-level
employees of the Company with duties and responsibilities substantially
comparable to those of the Employee;

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           (d) Has not received a bonus commensurate with bonuses (if any)
received by a majority of executive-level employees of the Company with duties
and responsibilities substantially comparable to those of the Employee; or

           (e) Has been notified that his principal place of work as an employee
of the Company will be relocated by a distance of 50 miles or more.

        4. Definition of Cause.

        For all purposes under this Agreement, "Cause", shall mean:

           (a) A willful act by the Employee which constitutes misconduct or
fraud and which is injurious to the Company; provided, however, that no act, or
failure to act, by the Employee shall be considered "willful" unless committed
without good faith and without a reasonable belief that the act or omission was
in the Company's best interest; or

           (b) Conviction of, or a plea of "guilty" or "no contest" to, a
felony.

        The Board of Directors of the Company shall have sole discretion with
respect to whether any act or failure to act constitutes "Cause" for purposes of
this Agreement.

        5. Definition of Continuation Period.

        For all purposes under this Agreement, "Continuation Period" shall mean
the period commencing on the date when the termination of the Employee's
employment under Section 6 is effective and ending on the earlier of:

           (a) The date twelve (12) months after the date when the employment
termination was effective; or

           (b) The date of the Employee's death.

        6. Entitlement to Severance Pay and Benefits.

        The Employee shall be entitled to receive the severance pay described in
Section 7 (the "Severance Pay") and the benefits described in Section 8 from the
Company if, and only if, one of the following events occurs (each a "Termination
Event"):

           (a) Within the first 12-month period after the occurrence of a Change
in Control, the Employee voluntarily resigns his employment for Good Reason; or

           (b) Within the first 12-month period after the occurrence of a Change
in Control, the Company terminates the Employee's employment for any reason
other than Cause.

        7. Amount of Severance Pay.

        During the Continuation Period, the Company shall pay the Employee
Severance Pay at an annual rate equal to the sum of:

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           (a) The Employee's base compensation at the annual rate in effect on
the date when the termination of his employment with the Company is effective;
plus

           (b) The arithmetic mean of the Employee's annual bonuses for the last
three calendar years completed prior to the date when the termination of his
employment with the Company is effective. In the event that the Employee
received no bonus from the Company for one or more of such calendar years, the
years in which no bonus was paid shall be disregarded and the arithmetic mean of
the Employee's bonuses for the remaining years (if any) shall be used.

        Such amount shall be paid pro-rata at periodic intervals in accordance
with the Company's standard payroll procedures.

        8. Other Benefits.

           (a) Stock options and Restricted Stock. All unvested stock options
and shares of restricted stock granted to Employee by the Company shall vest
immediately upon the occurrence of a Termination Event. The post-termination
exercise grace period under the Employee's stock options shall commence at the
end of the Continuation Period. The Employee represents that he has consulted or
will consult a tax adviser regarding the impact of this Subsection (a) on the
tax treatment of incentive stock options and shares of restricted stock.

           (b) Group Insurance. At the commencement of the Continuation Period,
the Employee (and, where applicable, his dependents) shall he entitled to
convert his key employee long-term disability policy and group life insurance
policy into individual policies pursuant to the terms of such policies. Should
the Employee elect to convert either or both of such policies, the Company will
pay the premiums for such policy or policies during the Continuation Period. At
the commencement of the Continuation Period, the Employee shall be eligible to
continue his group health continuation coverage under the Consolidated Omnibus
Budget Reconciliation Act of 1986, and the Company will pay the premiums for
such coverage during the Continuation Period. The foregoing notwithstanding, in
the event that the Employee becomes eligible for comparable group insurance
coverage in connection with new employment, the premium payments by the Company
under this Subsection (b) shall terminate immediately.

           (c) Outplacement Services. Upon the occurrence of a Termination
Event, the Employee shall be entitled to reasonable outplacement services at the
Company's expense. Such services shall be provided by a firm selected by the
Employee from a list compiled by the Company and shall be limited to a period of
six consecutive months.

        9. Limitation on Payments.

           (a) Basic Rule. Any other provision of this Agreement
notwithstanding, the Company shall not be required to make any payment or
property transfer to, or for the benefit of, the Employee (under this Agreement
or otherwise) that would be nondeductible by the Company by reason of Section
280G of the Internal Revenue Code of 1986, as amended (the "Code"), or that
would subject the Employee to the excise tax described in Section 4999 of the
Code. All calculations required by this Section 9 shall be performed by the
independent auditors retained by the Company most recently prior to the Change
in Control (the "Auditors"), based on information supplied by the

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Company and the Employee, and shall be binding on the Company and the Employee.
All fees and expenses of the Auditors shall be paid by the Company.

           (b) Reductions. If the amount of the aggregate payments or property
transfers to the Employee must be reduced under this Section 9, then the
Employee shall direct in which order the payments or transfers are to be
reduced, but no change in the timing of any payment or transfer shall be made
without the Company's consent. As a result of uncertainty in the application of
sections 280G and 4999 of the Code at the time of an initial determination by
the Auditors hereunder, it is possible that a payment will have been made by the
Company that should not have been made (an "Overpayment") or that an additional
payment that will not have been made by the Company could have been made (an
"Underpayment"). In the event that the Auditors, based upon the assertion of a
deficiency by the Internal Revenue Service against the Company or the Employee
that the Auditors believe has a high probability of success, determine that an
Overpayment has been made, such Overpayment shall be treated for all purposes as
a loan to the Employee that he shall repay to the Company, together with
interest at the applicable federal rate specified in section 7872(f)(2) of the
Code; provided, however, that no amount shall be payable by the Employee to the
Company if and to the extent that such payment would not reduce the amount that
is nondeductible under section 280G of the Code or is subject to an excise tax
under section 4999 of the Code. In the event that the Auditors determine that an
Underpayment has occurred, such Underpayment shall promptly be paid or
transferred by the Company to, or for the benefit of, the Employee, together
with interest at the applicable federal rate specified in section 7872(f)(2) of
the Code.

        10. Non-Solicitation.

            After the occurrence of a Termination Event, the Employee agrees
that for a period of two years from the date of the Termination Event (the
"Non-Solicitation Term") he will not directly or indirectly solicit for
employment any employee of the Company who was employed by the Company at the
time of the occurrence of the Termination Event and remains in the employment of
the Company during the Non-Solicitation Term.

        11. Successors.

            (a) Company's Successors. The Company shall require any successor
(whether direct or indirect and whether by purchase, lease, merger,
consolidation, liquidation or otherwise) to all or substantially all of the
Company's business and/or assets, by an agreement in substance and form
satisfactory to the Employee, to assume this Agreement and to agree expressly to
perform this Agreement in the same manner and to the same extent as the Company
would be required to perform it in the absence of a succession. For all purposes
under this Agreement, the term "Company" shall include any successor to the
Company's business and/or assets which executes and delivers the assumption
agreement described in this Subsection (a) or which becomes bound by this
Agreement by operation of law.

            (b) Employee's Successors. This Agreement and all rights of the
Employee hereunder shall inure to the benefit of, and be enforceable by, the
Employee's personal or legal representatives, executors, administrators,
successors, heirs, distributees, devisees and legatees.

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        12. Miscellaneous Provisions.

            (a) Notice. Notices and all other communications contemplated by
this Agreement shall be in writing and shall be deemed to have been duly given
when personally delivered or when mailed by U.S. registered or certified mail,
return receipt requested and postage prepaid. In the case of the Employee,
mailed notices shall be addressed to him at the home address which he most
recently communicated to the Company in writing. In the case of the Company,
mailed notices shall be addressed to its corporate headquarters, and all notices
shall be directed to the attention of its Secretary.

            (b) Waiver. No provision of this Agreement shall be modified, waived
or discharged unless the modification, waiver or discharge is agreed to in
writing and signed by the Employee and by an authorized officer of the Company
(other than the Employee). No waiver by either party of any breach of, or of
compliance with, any condition or provision of this Agreement by the other party
shall be considered a waiver of any other condition or provision or of the same
condition or provision at another time.

            (c) Whole Agreement. No agreements, representations or
understandings (whether oral or written and whether express or implied) which
are not expressly set forth in this Agreement have been made or entered into by
either party with respect to the subject matter hereof.

            (d) No Setoff; Withholding Taxes. There shall be no right of setoff
or counterclaim, with respect to any claim, debt or obligation, against payments
to the Employee under this Agreement. All payments made under this Agreement
shall be subject to reduction to reflect taxes required to be withheld by law.

            (e) Choice of Law. The validity, interpretation, construction and
performance of this Agreement shall be governed by the laws of the State of
California.

            (f) Severability. The invalidity or unenforceability of any
provision or provisions of this Agreement shall not affect the validity or
enforceability of any other provision hereof, which shall remain in full force
and effect.

            (g) Potential Pooling Transactions. In the event the Board
determines that the acceleration of options pursuant to Sections 8(a) above
would preclude accounting for a proposed business transaction involving a Change
in Control as a "Pooling of Interests," but the Board otherwise desires to
approve and account for such transaction as a "Pooling of Interests," the
acceleration of options described in Sections 8(a) above shall be null and void,
and the Company shall enter into a consulting agreement with the employee
covering services and compensation to be determined by the parties at that time.
Such agreement shall be for a period of three years and shall not be subject to
earlier termination unless by mutual consent of the parties.

            (h) Arbitration. Except as otherwise provided in Section 9, any
dispute or controversy arising under or in connection with this Agreement shall
be settled exclusively by arbitration in San Jose, California, in accordance
with the rules of the American Arbitration Association then in effect. Judgment
may be entered on the arbitrator's award in any court having jurisdiction.
Punitive damages shall not be awarded.

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            (i) No Assignment of Benefits. The rights of any person to payments
or benefits under this Agreement shall not be made subject to option or
assignment, either by voluntary or involuntary assignment or by operation of
law, including (without limitation) bankruptcy, garnishment, attachment or other
creditor's process, and any action in violation of this subsection (i) shall be
void.

            (j) Employment Taxes. All payments made pursuant to this Agreement
will be subject to withholding of applicable income and employment taxes.

Counterparts. This Agreement may be executed in counterparts, each of which
shall be deemed an original, but all of which together will constitute one and
the same instrument.

                                        Microcide Pharmaceuticals, Inc.

                                        ---------------------------------------
                                        By:
                                        Title:

                                        [Employee]

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                                                                    EXHIBIT 10.1

                                                                    (NOVELLUS I)

                   SECOND AMENDMENT TO PARTICIPATION AGREEMENT

        THIS SECOND AMENDMENT TO PARTICIPATION AGREEMENT (this "Amendment"),
dated as of April 13, 2001, is entered into by and among:

                  (1) NOVELLUS SYSTEMS, INC., a California corporation
         ("Lessee");

                  (2) LEASE PLAN NORTH AMERICA, INC., an Illinois corporation
         ("Head Lessor");

                  (3) ABN AMRO LEASING, INC., an Illinois corporation
         ("Lessor");

                  (4) Each of the financial institutions listed in Schedule I to
         the Participation Agreement referred to in Recital A below
         (collectively, the "Participants"); and

                  (5) ABN AMRO BANK N.V., as agent for the Participants (in such
         capacity, "Agent").

                                    RECITALS

        A. Lessee, Head Lessor, Lessor, Participants and Agent are parties to a
Participation Agreement dated as of August 31, 1998 (as amended by a First
Amendment thereto dated as of June 4, 1999, the "Participation Agreement"),
pursuant to which Lessor and Participants have provided to Lessee two lease
facilities (individually, "Facility 1" and "Facility 2" and, collectively, the
"Facilities").

        B. Lessee now has requested Head Lessor, Lessor, Participants and Agent
to amend the Participation Agreement and certain of the other Operative
Documents (as defined in the Participation Agreement) to (1) remove from
Facility 2 certain of the property leased to Lessee thereunder (such removed
property to be referred to herein as the "Novellus IV Property"), and (2) make
certain other changes. (The property remaining in Facility 2 after the removal
of the Novellus IV Property shall be referred to herein as the "Remaining
Facility 2 Property".)

         C. Head Lessor, Lessor, Participants and Agent are willing so to amend
the Participation Agreement and the other Operative Documents upon the terms and
subject to the conditions set forth in this Amendment.

                                    AGREEMENT

        NOW, THEREFORE, in consideration of the above recitals and for other
good and valuable consideration, the receipt and adequacy of which are hereby
acknowledged, Lessee, Head Lessor, Lessor, the Participants and Agent hereby
agree as follows:

        1. DEFINITIONS, INTERPRETATION. All capitalized terms defined above and
elsewhere in this Amendment shall be used herein as so defined. Unless otherwise
defined herein, all other

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capitalized terms used herein shall have the respective meanings given to those
terms in the Participation Agreement, as amended by this Amendment. The rules of
construction set forth in Schedule 1.02 to the Participation Agreement shall, to
the extent not inconsistent with the terms of this Amendment, apply to this
Amendment and are hereby incorporated by reference.

         2. AMENDMENTS TO PARTICIPATION AGREEMENT. Subject to the satisfaction
of the conditions set forth in Paragraph 5 below, the Participation Agreement is
hereby amended as follows:

               (a) Subparagraph 2.06(a) is amended by changing clause (iii)(D)
               to read in its entirety as follows:

                        (D) the purchase price paid by any Person (except as
               otherwise provided in clause (i) above) to purchase the
               Property under such Facility (whether after the retention of
               such Property by Lessor following the Expiration Date of the
               Lease Agreement for such Facility, upon foreclosure or
               otherwise);

               (b) Subparagraph 4.01(g) is amended to read in its entirety as
       follows:

                   (g) Litigation. Except as set forth in the most recent
             Form 10-Q and 10-K reports filed by Lessee with the Securities
               and Exchange Commission, no actions (including, without
               limitation, derivative actions), suits, proceedings or
               investigations are pending or, to the knowledge of Lessee,
               threatened against Lessee or any of its Subsidiaries at law or in
               equity in any court or before any other Governmental Authority
               which (i) is reasonably likely (alone or in the aggregate) to
               have a Material Adverse Effect or (ii) seeks to enjoin, either
               directly or indirectly, the execution, delivery or performance by
               Lessee of the Operative Documents or the transactions
               contemplated thereby.

                (c) Subparagraph 4.01(k) is amended to read in its entirety as
         follows:

                      (k) No Agreements to Sell Assets; Etc. Neither Lessee nor
               any of its Subsidiaries has any legal obligation, absolute or
               contingent, to any Person to sell the assets of Lessee or any of
               its Subsidiaries (other than sales in the ordinary course of
               business), or to effect any merger, consolidation or other
               reorganization of Lessee or any of its Subsidiaries or to enter
               into any agreement with respect thereto, except for sales,
               mergers, consolidations or reorganizations permitted by
               Subparagraph 5.02(c), 5.02(d) or 5.02(e).

                 (d) Subparagraph 4.01(l) is amended by changing clause (i) to
         read in its entirety as follows:

                      (i) Based on the most recent valuation date for any
               Pension Plan, the amount of unfunded benefit liabilities (as
               defined in Section 4001(a)(18) of ERISA), individually or in the
               aggregate for all Pension Plans (excluding for purposes of such
               computation any Pension Plans with respect to which assets exceed
               benefit liabilities) does not exceed an amount equal to
               $10,000,000. No Pension Plan has failed to meet the minimum
               funding standard of Code Section 412 (whether or not waived under
               Code Section 412(d)) or failed to make by its due date a required
               installment under Code Section 412(m). Neither Lessee nor

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               any ERISA Affiliate has any liability with respect to any
               post-retirement benefit under any Employee Benefit Plan which is
               a welfare plan (as defined in section 3(1) of ERISA) that is
               reasonably likely to have a Material Adverse Effect.

                  (e) Subparagraph 4.01(n) is amended to read in its entirety as
         follows:

                      (n) Patent and Other Rights. Except as set forth in
               Schedule 4.01(g), Lessee and its Subsidiaries own, license or
               otherwise have the right to use, under validly existing
               agreements, all patents, licenses, trademarks, trade names, trade
               secrets, service marks, copyrights and all rights with respect
               thereto, which are required to conduct their businesses as now
               conducted, except where the failure to have any such rights,
               either individually or collectively, is not reasonably likely to
               have a Material Adverse Effect.

                  (f) Subparagraph 4.01(q) is amended to read in its entirety as
         follows:

                      (q) Subsidiaries, etc. Set forth in Schedule 4.01(q) (as
               supplemented by Lessee from time to time in a written notice to
               Agent) is a complete list of all of Lessee's Subsidiaries, the
               jurisdiction of incorporation of each, the classes of Equity
               Securities of each and the percentages of shares of each such
               class owned directly or indirectly by Lessee.

                  (g) Paragraph 4.01 is further amended by (i) deleting
         Subparagraph 4.01(v) and (ii) changing the designation of Subparagraph
         4.01(w) to "(v)".

                  (h) Subparagraph 5.01(a) is amended by (i) changing clauses
         (iii) and (v) to read in their entireties as follows:

                      (iii) Contemporaneously with the quarterly and year-end
               Financial Statements required by the foregoing clauses (i) and
               (ii), a compliance certificate of the president or chief
               financial officer of Lessee which (A) states that no Default has
               occurred and is continuing, or, if any such Default has occurred
               and is continuing, a statement as to the nature thereof and what
               action Lessee proposes to take with respect thereto; and (B) sets
               forth, for the quarter or year covered by such Financial
               Statements or as of the last day of such quarter or year (as the
               case may be), the calculation of the financial ratios and tests
               provided in Paragraph 5.03;

                      (v) As soon as possible and in no event later than five
               (5) Business Days after any Senior Officer of Lessee knows of the
               occurrence or existence of (A) any Reportable Event (excluding
               any Reportable Event for which the provision of a 30-day notice
               to the PBGC has been waived by regulation) under any Employee
               Benefit Plan or Multiemployer Plan; (B) any actual or threatened
               litigation, suits, claims or disputes against Lessee or any of
               its Subsidiaries involving potential monetary damages payable by
               Lessee or its Subsidiaries of $10,000,000 or more (alone or in
               the aggregate); (C) any other event or condition which is
               reasonably likely to have a Material Adverse Effect; or (D) any
               Default; the statement of the president or chief financial
               officer of Lessee setting forth

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              details of such event, condition or Default and the action which
              Lessee proposes to take with respect thereto;

         (ii) deleting clause (vii) and (iii) changing the designations of
         clauses (viii), (ix) and (x) to "(vii)", "(viii)" and "(ix)",
         respectively.

              (i) Subparagraph 5.01(e) is amended to read in its entirety as
       follows:

                      (e) Governmental Charges and Other Indebtedness. Lessee
               and its Subsidiaries shall promptly pay and discharge when due
               (i) all taxes and other Governmental Charges prior to the date
               upon which penalties accrue thereon, (ii) all indebtedness which,
               if unpaid, could become a Lien upon the property of Lessee or its
               Subsidiaries and (iii) subject to any subordination provisions
               applicable thereto, all other indebtedness; except where (A) the
               failure to pay any such taxes, other Governmental Charges or
               indebtedness, either alone or collectively, is not reasonably
               likely to have a Material Adverse Effect and (B) any such taxes,
               other Governmental Charges or indebtedness as may in good faith
               be contested or disputed, or for which arrangements for deferred
               payment have been made, provided that in each such case
               appropriate reserves as required by GAAP are maintained.

               (j) Paragraph 5.01 is further amended by (i) deleting
        Subparagraphs 5.01(h) and 5.01(i) and (ii) adding a new Subparagraph
        5.01(h) to read in its entirety as follows:

                      (h) Related Credit Agreement. If at any time the financial
               covenants set forth in Paragraph 5.03 (or any applicable
               definition used therein) differs from the financial covenants set
               forth in the Related Credit Agreement (or any applicable
               definition used therein), Lessee shall execute such amendments to
               this Agreement as Lessor or Required Participants may reasonably
               request to conform the financial covenants set forth in Paragraph
               5.03 (or any applicable definition used therein) with such
               financial covenants set forth in the Related Credit Agreement.

               (k) Subparagraph 5.02(a) is amended by (i) changing clauses (iii)
        and (iv) to read in their entirety as follows:

                      (iii) Synthetic Lease Obligations, provided that the
               aggregate principal amount thereof (including the Outstanding
               Lease Amounts hereunder) outstanding at any time does not exceed
               $595,000,000;
                      (iv) Indebtedness of Lessee and its Subsidiaries listed in
               Schedule 5.02(a) and existing on April 13, 2001 (including
               committed but undrawn amounts);

        and (ii) changing the reference to "clause (ii), (iii) or (v)" in clause
        (ix) to "clause (ii) or (iv)".

               (l) Subparagraph 5.02(b) is amended by changing clauses (ii) and
        (x) to read in their entireties as follows:

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                     (ii) Liens securing the Related Credit Obligations or
              Synthetic Lease Obligations;

                      (x) Judgement Liens, provided that such Liens do not have
               a value in excess of $10,000,000 or such Liens are released,
               stayed, vacated or otherwise dismissed within twenty (20) days
               after issue or levy and, if so stayed, such stay is not
               thereafter removed;

              (m) Subparagraph 5.02(c) is amended by changing clause (vi) to
       read in its entirety as follows:

                      (vi) Sales or other dispositions of assets and property by
               Lessee to any of Lessee's Subsidiaries or by any of Lessee's
               Subsidiaries to Lessee or any of its other Subsidiaries, provided
               the terms of any such sales or other dispositions by or to Lessee
               (other than sales or other dispositions by Lessee to any of
               Lessee's wholly owned Subsidiaries or by any of Lessee's wholly
               owned subsidiaries to Lessee, except for sales or dispositions by
               Lessee which, either singly or in the aggregate with respect to
               all such sales or dispositions, would involve all or
               substantially all of the assets or property of Lessee or which
               would render Lessee incapable of performing its obligations under
               the Operative Documents) are on terms which are no less favorable
               to Lessee than would prevail in the market for similar
               transactions between unaffiliated parties dealing at arms length;

               (n) Subparagraph 5.02(d) is amended by changing clause (iii)(C)
        thereof to read in its entirety as follows:

                      (C) The aggregate cost of any such merger, consolidation,
               establishment or acquisition does not exceed the amounts
               permitted under clause (v) of Subparagraph 5.02(e) (except for
               Lessee's cost of acquiring Gasonics International Corporation,
               which shall not be subject to such limitation).

              (o) Subparagraph 5.02(e) is amended to read in its entirety as
       follows:

                     (e) Investments. Neither Lessee nor any of its Subsidiaries
              shall make any Investment except for Investments in the following:

                             (i) Investments permitted by the investment policy
                      of Lessee duly approved by the Board of Directors of
                      Lessee and in effect at the time of such Investment;

                            (ii) Investments held by Gasonics International
                     Corporation on the date Gasonics International Corporation
                     is acquired by Lessee;

                            (iii) Any transaction permitted by Subparagraph
                     5.02(a);

                             (iv) Investments by Lessee in the "Tranche A"
                      portion of synthetic leases in which it is the lessee and
                      which constitute Economically Defeased Synthetic Lease
                      Obligations;

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<PAGE>   6
                             (v) Investments in joint ventures and strategic
                      alliances, provided that the aggregate amount of such
                      Investments does not exceed in any fiscal year two and
                      one-half percent (2 1/2%) of the tangible assets of Lessee
                      and its Subsidiaries, determined on a consolidated basis
                      in accordance with GAAP, on the last day of the
                      immediately preceding fiscal year; and

                             (vi) Other Investments, provided that the aggregate
                      amount of such other Investments plus the aggregate cost
                      of all mergers and consolidations consummated,
                      Subsidiaries established and Subsidiaries and assets
                      acquired by Lessee pursuant to Subparagraph 5.02(d)
                      (excluding Lessee's acquisition of Gasonics International
                      Corporation) does not exceed in any fiscal year (A)
                      $100,000,000 for any amounts paid in cash and (B)
                      $500,000,000 for any amounts paid with shares of common
                      stock of Lessee (as determined according to the stock
                      price of such shares on the date of transfer) and
                      accounted for on a pooling basis in accordance with GAAP.

               (p) Paragraph 5.02 is further amended by (i) deleting
        Subparagraph 5.02(i) and (ii) changing the designation of Subparagraph
        5.02(j) to "(i)".

              (q) Paragraph 5.03 is amended to read in its entirety as follows:

                      5.03. Lessee's Financial Covenants. Until the termination
               of this Agreement and the satisfaction in full by Lessee of all
               Lessee Obligations, Lessee will comply, and will cause
               compliance, with the following financial covenants, unless Lessor
               and Required Participants shall otherwise consent in writing:

                             (a) Funded Indebtedness/Capital Ratio. Lessee shall
                      not permit its Funded Indebtedness/Capital Ratio on any
                      day set forth below to be greater than the ratio set forth
                      opposite such day below:

                             The last day of any
                                    fiscal quarter               0.40 to 1.00.

                            (b) Quick Ratio. Lessee shall not permit its Quick
                     Ratio on any day set forth below to be less than the ratio
                     set forth opposite such day below:

                             The last day of any
                                    fiscal quarter               1.50 to 1.00.

                             (c) Debt Service Coverage Ratio. Lessee shall not
                      permit its Debt Service Coverage Ratio for any fiscal
                      quarter ending on any day set forth below to be less than
                      the ratio set forth opposite such day below:

                             The last day of any
                                    fiscal quarter               3.50 to 1.00.

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                             (d) Tangible Net Worth. Commencing on December 31,
                      2000, Lessee shall not permit its Tangible Net Worth on
                      the last day of any fiscal quarter (such date to be
                      referred to herein as a "determination date") to be less
                      than the sum on such determination date of the following:

                                   (i) $664,477,000.00 (the approximate amount
                            of Lessee's Tangible Net Worth on December 31,
                            1999);

                                                           plus

                                   (ii) Seventy-five percent (75%) of the sum of
                            (A) Lessee's consolidated annual net income for its
                            fiscal year ending December 31, 2000 (ignoring any
                            annual loss); plus (B) the sum of Lessee's
                            consolidated quarterly net income (ignoring any
                            quarterly losses) for each fiscal quarter ending
                            after December 31, 2000 through and including the
                            fiscal quarter ending on the determination date;

                                                           plus

                                   (iii) One hundred percent (100%) of the Net
                            Proceeds of all Equity Securities issued by Lessee
                            and its Subsidiaries (to Persons other than Lessee
                            or its Subsidiaries) during the period commencing on
                            December 31, 1999 and ending on the determination
                            date;

                                                           plus

                                   (iv) One hundred percent (100%) of the
                            principal amount of all debt securities of Lessee
                            and its Subsidiaries converted into Equity
                            Securities of Lessee and its Subsidiaries during the
                            period commencing on December 31, 1999 and ending on
                            the determination date.

                      provided, however, that in no case shall Lessee permit its
                      Tangible Net Worth on December 31, 2000 to be less than
                      $1,260,000,000.00.

                     (e) Minimum Cash Balances. Lessee shall not permit its Cash
              Balances on any date to be less than the remainder of:

                                    (i) The aggregate amount on such date of all
                             Synthetic Lease Obligations of Lessee and its
                             Subsidiaries that (A) would be attributable to
                             principal if such obligations were treated as loan
                             obligations and (B) become due within one (1) year
                             of such date;

                                                          minus

                                    (ii) The sum of (A) all cash of Lessee and
                             its Subsidiaries on such date and (B) the market
                             value of Cash Equivalents and short-term marketable
                             securities (that are

                                       7
<PAGE>   8
                             classified as current assets in accordance with
                             GAAP) of Lessee and its Subsidiaries on such date
                             to the extent such cash, Cash Equivalents and
                             short-term marketable securities secure payment of
                             the current Synthetic Lease Obligations referred to
                             in clause (i) above.

                  (In calculating the market value of Cash Equivalents and
                  short-term marketable securities under this subparagraph, Cash
                  Equivalents and short-term marketable securities shall be
                  marked to market quarterly.)

                  (r) Paragraph 7.01 is amended by changing the notice
            addresses, etc. for Lessee, Lessor and Agent set forth therein to
            read in their entireties as follows:

                      Lessee:       Novellus Systems, Inc.
                                    4000 North First Street
                                    San Jose, CA 95134
                                    Attn:  Treasurer
                                    Telephone:  (408) 432-5339
                                    Fax No: (408) 545-3009

                      Lessor:       ABN AMRO Leasing, Inc.
                                    c/o ABN AMRO Bank N.V.
                                    135 South LaSalle Street, Suite 740
                                    Chicago, IL 60603
                                    Attn: David M. Shipley
                                    Telephone: (312) 904-2183
                                    Fax No: (312) 904-6217

                      Agent:        ABN AMRO Bank N.V.
                                    Agency Services
                                    208 South LaSalle Street, Suite 1500
                                    Chicago, IL 60604
                                    Attn: Josephine O'Brien
                                    Telephone:  (312) 992-5091
                                    Fax: (312) 992-5157

                                    with copies to:

                                    ABN AMRO Bank N.V.
                                    101 California Street, Suite 4550
                                    San Francisco, CA  94111-5812
                                    Attn:  Joe Endoso
                                    Telephone:  (415) 984-3718
                                    Fax:  (415) 362-3524

                                       and

                                    ABN AMRO Bank N.V.
                                    Credit Administration

                                       8
<PAGE>   9
                                    208 South LaSalle Street, Suite 1500
                                    Chicago, IL 60604
                                    Attn:  Gregory Miller
                                    Telephone:  (312) 992-5116
                                    Fax:  (312) 992-5111

               (s) Schedule 1.01 is amended by changing the definitions of the
        following terms appearing therein to read in their entireties as
        follows:

                  "Adjusted Net Income" shall mean, with respect to Lessee for
            any period, the sum, determined on a consolidated basis in
            accordance with GAAP, of the following:

                              (a) The net income or net loss of Lessee and its
                        Subsidiaries for such period before provision for income
                        taxes;

                                                        plus

                              (b) The sum (to the extent deducted in calculating
                        net income or loss in clause (a) above) of (i) all
                        Interest Expenses of Lessee and its Subsidiaries
                        accruing during such period, (ii) all depreciation and
                        amortization expenses of Lessee and its Subsidiaries
                        accruing during such period, and (iii) all rental
                        expenses of Lessee and its Subsidiaries accruing during
                        such period (including Base Rent under the Lease
                        Agreements but excluding any Base Rent or other rental
                        expenses that are capitalized by the lessor during such
                        period);

                                                       minus

                              (c) Fifty percent (50%) of all Capital
                        Expenditures of Lessee and its Subsidiaries accruing
                        during such period.

                  "Agent's Fee Letter" shall mean collectively the letter
            agreement dated as of July 20, 1998 between Lessee and Agent
            regarding certain fees payable by Lessee to Agent and the letter
            agreements dated as of October 11, 2000 and December 5, 2000 between
            Lessee and Agent regarding certain other fees payable by Lessee to
            Agent.

                  "Debt Service Coverage Ratio" shall mean, with respect to
            Lessee for any period, the ratio, determined on a consolidated basis
            in accordance with GAAP, of:

                              (a) The Adjusted Net Income of Lessee for such
                        period;

                                                     to

                              (b) The sum of (i) all Interest Expenses of Lessee
                        and its Subsidiaries accruing during such period, (ii)
                        all rental expenses of Lessee and its Subsidiaries
                        accruing during such period (including Base Rent under
                        the Lease Agreements but excluding any Base Rent or
                        other rental

                                       9
<PAGE>   10
                        expenses that are capitalized by the lessor during such
                        period), and (iii) 25% of all payments of principal (or,
                        in the case of Capital Leases, amounts attributable to
                        principal) of Funded Indebtedness (excluding Synthetic
                        Lease Obligations) paid or scheduled to be paid by
                        Lessee and its Subsidiaries due within one year.

                  "EBITDA" shall mean, with respect to Lessee for any period,
            the sum, determined on a consolidated basis in accordance with GAAP,
            of the following:

                              (a) The net income or net loss of Lessee and its
                        Subsidiaries for such period before provision for income
                        taxes;

                                                        plus

                              (b) The sum (to the extent deducted in calculating
                        net income or loss in clause (a) above) of (i) all
                        Interest Expenses of Lessee and its Subsidiaries
                        accruing during such period and (ii) all depreciation
                        and amortization expenses of Lessee and its Subsidiaries
                        accruing during such period.

                  "Funded Indebtedness" of any Person shall mean, without
            duplication:

                              (a) All obligations of such Person evidenced by
                        notes, bonds, debentures or other similar instruments
                        and all other obligations of such Person for borrowed
                        money (including obligations to repurchase receivables
                        and other assets sold with recourse);

                              (b) All obligations of such Person for the
                        deferred purchase price of property or services
                        (including obligations under letters of credit and other
                        credit facilities which secure or finance such purchase
                        price but excluding trade payables incurred by such
                        Person in the ordinary course of its business on
                        ordinary terms and not overdue) and all Synthetic Lease
                        Obligations of such Person (excluding the Economically
                        Defeased Portion of Synthetic Lease Obligations);

                              (c) All obligations of such Person under
                        conditional sale or other title retention agreements
                        with respect to property acquired by such Person (to the
                        extent of the value of such property if the rights and
                        remedies of the seller or lender under such agreement in
                        the event of default are limited solely to repossession
                        or sale of such property); and

                              (d) All obligations of such Person as lessee under
                        or with respect to Capital Leases.

                        "Lease Reduction Payments" shall mean each of the
                  following to the extent applied to reduce the Outstanding
                  Lease Amount under either Facility pursuant to the Operative
                  Documents:

                              (a) The Principal Component of Base Rent paid
                        under such Facility;

                                       10
<PAGE>   11
                              (b) Casualty and Condemnation Proceeds with
                        respect to such Facility;

                              (c) The purchase price paid for the Property (or
                        any portion thereof) by Lessee, an Assignee Purchaser or
                        a Designated Purchaser pursuant to the Purchase
                        Agreement for such Facility;

                              (d) The Residual Value Guaranty and Indemnity
                        Amount paid by Lessee pursuant to the Purchase Agreement
                        for such Facility;

                              (e) Any proceeds received by Lessee from any sale
                        of the Property under such Facility after the Expiration
                        Date for such Facility if such Property is retained by
                        Lessor after such Expiration Date pursuant to the
                        applicable Purchase Agreement;

                              (f) Any proceeds received by any Lessor Party from
                        the exercise of any of its remedies under the Operative
                        Documents after the occurrence of an Event of Default
                        under the Lease Agreement for such Facility; and

                              (g) Any other amount received by Lessor that
                        Lessee, Lessor and Agent agree shall be applied to
                        reduce the Outstanding Lease Amount under a Facility.

                        "Material Casualty" shall mean any Casualty to the
                  Property that alone, or in combination with any prior
                  Casualties to the Property for which repairs to restore the
                  Property to its prior condition have not been completed, will
                  require repairs costing $2,500,000 or more to restore the
                  Property to its prior condition.

                        "Operative Documents" shall mean and include the
                  Participation Agreement, the Head Lease Agreements, the Lease
                  Agreements, the Facility 2 Construction Agency Agreement, the
                  Purchase Agreements, the Lessee Security Documents, the Lessor
                  Deed of Trust, the Lessor Security Agreement, the Assignment
                  of Lease, the Agent's Fee Letter, the Agent's Syndication
                  Letter and the Lessor's Fee Letter; all other notices,
                  requests, certificates, documents, instruments and agreements
                  delivered to any Lessor Party pursuant to Paragraph 3.01 of
                  the Participation Agreement; all notices, requests,
                  certificates, documents, instruments and agreements required
                  to be delivered to any Lessor Party in connection with any of
                  the foregoing on or after the date of the Participation
                  Agreement; and all Rate Contracts provided to Lessee by any
                  Participant to hedge against fluctuations in the LIBOR Rental
                  Rate under either or both Lease Agreements. (Without limiting
                  the generality of the preceding definition, the term
                  "Operative Documents" shall include all written waivers,
                  amendments and modifications to any of the notices, requests,
                  certificates, documents, instruments and agreements referred
                  to therein.)

                        "Pension Plan" shall mean any Employee Benefit Plan
                  subject to Title IV of ERISA that either Lessee or any ERISA
                  Affiliate maintains or contributes to or has any obligation
                  under.

                                       11
<PAGE>   12
                        "Quick Ratio" shall mean, with respect to Lessee at any
                  time, the ratio, determined on a consolidated basis in
                  accordance with GAAP, of:

                             (a) The remainder of (i) the sum (without
                      duplication) of all cash, Cash Equivalents, short-term
                      investments and net accounts receivable of Lessee and its
                      Subsidiaries at such time, minus (ii) the sum (without
                      duplication) of all such cash, Cash Equivalents,
                      short-term investments and net accounts receivable that
                      are subject to a Lien or are otherwise restricted;

                                                     to

                              (b) The current liabilities of Lessee and its
                        Subsidiaries at such time.

            (In calculating the Quick Ratio, Cash Equivalents and short-term
            investments shall be marked to market quarterly.)

            (t) Schedule 1.01 is further amended by adding thereto, in the
      appropriate alphabetical order, the definitions of the following terms to
      read in their entireties as follows:

                        "Cash Balances" shall mean, with respect to Lessee and
                  its Subsidiaries at any time, the sum, determined on a
                  consolidated basis in accordance with GAAP, of (a) the
                  unrestricted, unencumbered cash of Lessee and its Subsidiaries
                  at such time and (b) the market value of unrestricted,
                  unencumbered Cash Equivalents and short-term marketable
                  securities (that are classified as current assets in
                  accordance with GAAP) of Lessee and its Subsidiaries at such
                  time. (In calculating Cash Balances, Cash Equivalents and
                  short-term marketable securities shall be marked to market
                  quarterly.)

                        "Economically Defeased Portion of Synthetic Lease
                  Obligations" shall mean the remainder of (a) the sum of the
                  "Tranche A" portions, "Tranche B" portions and "Tranche C"
                  portions of leases constituting Economically Defeased
                  Synthetic Lease Obligations, minus (b) the aggregate amount of
                  the "Tranche A" portions of such leases that the lessee has
                  sold, assigned or otherwise transferred to any other Person.

                        "Economically Defeased Synthetic Lease Obligations"
                  shall mean Synthetic Lease Obligations under synthetic leases
                  in which the lessee has secured the "Tranche B" portion of
                  such leases and the "Tranche C" portion of such leases with
                  cash and/or Cash Equivalents and initially has purchased a
                  100% participation interest in the "Tranche A" portion of such
                  leases.

                        "Synthetic Lease Obligations" shall mean the monetary
                  obligations of a Person under (a) a so-called synthetic,
                  off-balance sheet or tax retention lease, or (b) an agreement
                  for the use or possession of property creating obligations
                  that do not appear on the balance sheet of such Person but
                  which, upon the insolvency or bankruptcy of such Person, would
                  be characterized as the indebtedness of such Person (without
                  regard to accounting treatment).

                                       12
<PAGE>   13
            (u) Schedules 4.01(g) and 5.02(e) are deleted.

            (v) Schedule 5.02(a) is amended to read in its entirety as set forth
      in the counterpart schedule hereto.

            (w) Exhibit A is amended by deleting therefrom (i) Part 2 describing
      Tract 2 (3940 and 3950 N. First St.), (ii) Part 5 describing Tract 5 (90
      Headquarters Drive) and (iii) that certain portion of Part 1 describing
      Tract 1 (3930 N. First St.) subject to Lot Line Adjustment Permit No. AT
      00-11-150 recorded on March 8, 2001 in the Official Records of Santa Clara
      County, California, as Instrument No. 15585476.

            (x) Exhibits E, F(1) and F(2) are hereby amended by changing the
      notice address appearing therein to the following:

                      ABN AMRO Bank N.V.
                      Agency Services
                      208 South LaSalle Street, Suite 1500
                      Chicago, IL  60604
                      Attn:  Josephine O'Brien

      3. AMENDMENTS TO OTHER OPERATIVE DOCUMENTS. Subject to the satisfaction of
the conditions set forth in Paragraph 5 below, the Lease Agreements, Purchase
Agreements and Facility 2 Construction Agency Agreement are hereby amended by
changing the notice address appearing in the exhibits thereto in the same manner
as provided in the immediately preceding subparagraph 2(x).

      4. REPRESENTATIONS AND WARRANTIES. Lessee hereby represents and warrants
to Agent and the Participants that the following are true and correct on the
date of this Amendment and that, after giving effect to the amendments set forth
in Paragraphs 2 and 3 above, the following will be true and correct on the
Effective Date (as defined below):

            (a) The representations and warranties of Lessee set forth in
      Paragraph 4.01 of the Participation Agreement and in the other Operative
      Documents are true and correct in all material respects as if made on such
      date (except for representations and warranties expressly made as of a
      specified date, which shall be true as of such date);

            (b) No Default has occurred and is continuing; and

            (c) All of the Operative Documents are in full force and effect.

(Without limiting the scope of the term "Operative Documents," Lessee expressly
acknowledges in making the representations and warranties set forth in this
Paragraph 4 that, on and after the date hereof, such term includes this
Amendment.)

      5. EFFECTIVE DATE. Lessee shall deliver to Agent a written notice
specifying the effective date for this Amendment ("Effective Date"), which date
shall be a Business Day prior to April 27, 2001. Lessee shall deliver such
notice to Agent at least five (5) Business Days prior to the Effective Date. The
amendments effected by Paragraphs 2 and 3 above shall then become effective on
the Effective Date, subject to receipt by Lessor, Agent and the Participants, on
or

                                       13
<PAGE>   14
prior to such date, of the following, each in form and substance satisfactory to
Lessor, Agent, Participants and their respective counsel:

            (a) This Amendment duly executed by Head Lessor, Lessor, Lessee,
      each Participant and Agent;

            (b) A First Amendment to Facility 1 Lease Agreement in the form of
      Exhibit A hereto, duly executed by Lessee and Lessor and appropriately
      notarized for recording;

            (c) A First Amendment to Facility 2 Lease Agreement in the form of
      Exhibit B hereto, duly executed by Lessee and Lessor and appropriately
      notarized for recording;

            (d) A Second Amendment to Facility 2 Head Lease Agreement in the
      form of Exhibit C hereto, duly executed by Head Lessor and Lessor;

            (e) A First Amendment to Assignment of Lease in the form of Exhibit
      D hereto, duly executed by Lessor and Agent and appropriately notarized
      for recording;

            (f) A First Amendment to Construction Deed of Trust in the form of
      Exhibit E hereto, duly executed by Lessor and Agent and appropriately
      notarized for recording;

            (g) An Amendment to the Memorandum of Purchase Agreement for
      Facility 2 to reflect the removal of the Novellus IV Property from
      Facility 2, duly executed by Lessee and Lessor and appropriately notarized
      for recording;

            (h) An Amendment to the Memorandum of Head Lease Agreement for
      Facility 2 to reflect the removal of the Novellus IV Property from
      Facility 2, duly executed by Head Lessor and Lessor and appropriately
      notarized for recording;

            (i) Evidence that the title company issuing the title endorsements
      pursuant to clause 5(j) below is prepared to record each of the documents
      delivered pursuant to clauses 5(b), 5(c), 5(e), 5(f), 5(g) and 5(h) above
      in the Official Records of the County of Santa Clara, California;

            (j) Such endorsements as Lessor and Agent may reasonably request to
      each of (i) the ALTA extended coverage owner's interim title insurance
      binder for the Property insuring Lessor's fee simple title therein issued
      in connection with the closing of the Participation Agreement, (ii) the
      ALTA extended coverage lender's policy of title insurance for the Property
      insuring the validity and priority of the Lease Agreements in connection
      with the closing of the Participation Agreement, and (iii) the ALTA
      extended coverage lender's policy of title insurance for the Property
      insuring the validity and priority of the Lessor Deed of Trust issued in
      connection with the closing of the Participation Agreement;

            (k) The following Appraisals, each dated as of a recent date prior
      to the Effective Date:

                  (1) An Appraisal that assesses the Fair Market Value of the
            Remaining Facility 2 Property, as of the date of such Appraisal, at
            not less than the remaining

                                       14
<PAGE>   15
            Outstanding Lease Amount under Facility 2 after application of the
            Lease Reduction Payment delivered by Lessee pursuant to clause 5(r)
            below; and

                  (2) An Appraisal that assesses the Fair Market Value of the
            Remaining Facility 2 Property, as of the Scheduled Expiration Date,
            at not less than the remaining Outstanding Lease Amount under
            Facility 2 after application of the Lease Reduction Payment
            delivered by Lessee pursuant to clause 4(r) below;

            (l) An as-built survey of each of the Facility 1 Property and the
      Remaining Facility 2 Property (a) prepared and dated not more than two (2)
      months prior to the Effective Date by a registered surveyor reasonably
      satisfactory to Agent, (b) certified as correct and as (i) having been
      made in accordance with the most recent standards for "Minimum Standard
      Detail Requirements for ALTA/ACSM Land Title Surveys," jointly established
      and adopted by ALTA and ACSM, and (ii) meeting the accuracy requirements
      of a Class A survey (as defined therein) and including items 1-5, 7-13 and
      15 of Table 3 thereof, and (c) disclosing, among other things, (i) the
      location of the perimeter of the Property by courses and distances, (ii)
      all easements and rights-of-way, whether above or underground, (iii) the
      lines of the street abutting the Property and the width thereof, (iv)
      encroachments, if any, and the extent thereof in feet and inches upon the
      Property, and (v) all boundary and lot lines, and all other matters that
      would be disclosed by inspection of the Property and the public records;

            (m) A certificate of the Chief Financial Officer or Treasurer of
      Lessee, addressed to Lessor and Agent and dated the Effective Date,
      certifying that:

                  (1) The representations and warranties set forth in Paragraph
            4.01 of the Participation Agreement and in the other Operative
            Documents are true and correct in all material respects as of such
            date (except for such representations and warranties made as of a
            specified date, which shall be true as of such date);

                  (2) No Default has occurred and is continuing as of such date;

                  (3) All of the Operative Documents are in full force and
            effect on such date;

            (n) A Certificate of Good Standing (or comparable certificate) for
      Lessee, certified as of a recent date prior to the Effective Date by the
      Secretary of State (or comparable official) of its jurisdiction of
      incorporation;

            (o) A Certificate of the Secretary of Lessee, dated the Effective
      Date, certifying that (i) that attached thereto are true and correct
      copies of Articles of Incorporation and Bylaws of Lessee as in effect on
      the Effective Date; and (ii) that attached thereto are true and correct
      copies of resolutions duly adopted by the Board of Directors of Lessee and
      continuing in effect, which authorize the execution, delivery and
      performance by Lessee of this Amendment and the consummation of the
      transactions contemplated hereby;

            (p) A certificate of the Secretary or an Assistant Secretary of
      Lessee, dated the Effective Date, certifying the incumbency, signatures
      and authority of the officers of Lessee authorized to execute, deliver and
      perform this Amendment and all other

                                       15
<PAGE>   16
      documents, instruments or agreements related thereto executed or to be
      executed by Lessee;

            (q) A favorable written opinion of Morrison & Foerster, LLP, counsel
      to Lessee, dated the Effective Date, addressed to Agent for the benefit of
      Lessor, Agent and the Participants, covering such legal matters as Agent
      may reasonably request and otherwise in form and substance satisfactory to
      Agent;

            (r) A Lease Reduction Payment of $44,813,000, to be applied to
      reduce the Outstanding Lease Amount under Facility 2 and to be shared by
      the Participants pro rata according to their respective Outstanding
      Participation Amounts under Facility 2 on the Effective Date;

            (s) An amendment fee for each Participant equal to 0.125% of such
      Participant's aggregate Outstanding Participation Amount under both
      Facilities on the Effective Date;

            (t) All fees and expenses payable to the Lessor Parties on or prior
      to the Effective Date (including all Agent's Fees);

            (u) All fees and expenses of Lessor's and Agent's counsels through
      the Effective Date, to the extent set forth in statements of such counsels
      delivered to Lessee one or more days prior to the Effective Date; and

            (v) Such other evidence as Lessor, Agent or any Participant may
      reasonably request to establish the accuracy and completeness of the
      representations and warranties and the compliance with the terms and
      conditions contained in this Amendment and the other Operative Documents.

      6. EFFECT OF THIS AMENDMENT. On and after the Effective Date, each
reference in the Participation Agreement and the other Operative Documents to
the Participation Agreement shall mean the Participation Agreement as amended
hereby. Except as specifically amended above, (a) the Participation Agreement
and the other Operative Documents shall remain in full force and effect and are
hereby ratified and affirmed and (b) the execution, delivery and effectiveness
of this Amendment shall not, except as expressly provided herein, operate as a
waiver of any right, power, or remedy of the Participants or Agent, nor
constitute a waiver of any provision of the Participation Agreement or any other
Operative Document.

      7. MISCELLANEOUS.

            (a) Counterparts. This Amendment may be executed in any number of
      identical counterparts, any set of which signed by all the parties hereto
      shall be deemed to constitute a complete, executed original for all
      purposes.

            (b) Headings. Headings in this Amendment are for convenience of
      reference only and are not part of the substance hereof.

            (c) Governing Law. This Amendment shall be governed by and construed
      in accordance with the laws of the State of California without reference
      to conflicts of law rules.

                                       16
<PAGE>   17
        IN WITNESS WHEREOF, Lessee, Head Lessor, Lessor, Agent and the
Participants have caused this Amendment to be executed as of the day and year
first above written.

LESSEE:                             NOVELLUS SYSTEMS, INC.

                                    By:___________________________
                                         Name:______________________
                                         Title:_______________________

HEAD LESSOR:                        LEASE PLAN NORTH AMERICA, INC.

                                    By:___________________________
                                         Name:______________________
                                         Title:_______________________

LESSOR:                             ABN AMRO LEASING, INC.

                                    By:___________________________
                                         Name:______________________
                                         Title:_______________________

AGENT:                              ABN AMRO BANK N.V.

                                    By:___________________________
                                         Name:______________________
                                         Title:_______________________

                                    By:___________________________
                                         Name:______________________
                                         Title:_______________________

PARTICIPANTS:                       ABN AMRO BANK N.V.

                                    By:___________________________
                                         Name:______________________
                                       Title:_______________________

                                    By:___________________________
                                         Name:______________________
                                         Title:_______________________

                                      S-1
<PAGE>   18
                                     KEYBANK NATIONAL ASSOCIATION

                                     By:___________________________
                                          Name:______________________
                                          Title:_______________________

                                     THE SUMITOMO BANK, LIMITED

                                     By:___________________________
                                          Name:______________________
                                          Title:_______________________

                                     THE INDUSTRIAL BANK OF JAPAN, LIMITED, SAN
                                     FRANCISCO AGENCY

                                     By:___________________________
                                          Name:______________________
                                          Title:_______________________

                                     THE BANK OF NOVA SCOTIA

                                     By:___________________________
                                          Name:______________________
                                          Title:_______________________

                                     UNION BANK OF CALIFORNIA, N.A.

                                     By:___________________________
                                          Name:______________________
                                          Title:_______________________

                                     COMERICA BANK-CALIFORNIA

                                     By:___________________________
                                          Name:______________________
                                          Title:_______________________

                                      S-2
<PAGE>   19
                                     FLEET NATIONAL BANK

                                     By:___________________________
                                          Name:______________________
                                          Title:_______________________

                                     BANQUE NATIONALE DE PARIS

                                     By:___________________________
                                          Name:______________________
                                          Title:_______________________

                                     CREDIT LYONNAIS LOS ANGELES BRANCH

                                     By:___________________________
                                          Name:______________________
                                          Title:_______________________

                                     THE FUJI BANK, LIMITED

                                     By:___________________________
                                          Name:______________________
                                          Title:_______________________

                                     THE MITSUBISHI TRUST AND BANKING
                                     CORPORATION, LOS ANGELES AGENCY

                                     By:___________________________
                                          Name:______________________
                                          Title:_______________________

                                      S-3
<PAGE>   20
                                     SOCIETE GENERALE

                                     By:___________________________
                                          Name:______________________
                                          Title:_______________________

                                     CALIFORNIA BANK & TRUST, formerly known
                                     as "The Sumitomo Bank of California"

                                     By:___________________________
                                          Name:______________________
                                          Title:_______________________

                                     SANWA BANK CALIFORNIA

                                     By:___________________________
                                          Name:______________________
                                          Title:_______________________

                                     ABN AMRO LEASING, INC.

                                     By:___________________________
                                          Name:______________________
                                          Title:_______________________

                                      S-4
<PAGE>   21
                                     GENERAL ELECTRIC CAPITAL CORP.

                                     By:___________________________
                                          Name:______________________
                                          Title:_______________________

                                     WELLS FARGO BANK

                                     By:___________________________
                                          Name:______________________
                                          Title:_______________________

                                     NATIONAL CITY BANK

                                     By:___________________________
                                          Name:______________________
                                          Title:_______________________

                                      S-5
<PAGE>   22
                                SCHEDULE 5.02(a)

                              EXISTING INDEBTEDNESS

<TABLE>
<CAPTION>
FINANCIAL INSTITUTION              CURRENCY                AMOUNT           FACILITY TYPE
---------------------              --------                ------           -------------
<S>                                <S>                <C>                  <C>
Bank of Tokyo Mitsubishi             JPY              1,300,000,000        Line of Credit
Bank of Tokyo Mitsubishi             JPY                520,000,000        Line of Credit
Sanwa Bank                           JPY              2,400,000,000        Line of Credit
Sumitomo Bank                        JPY                500,000,000        Line of Credit
ABN AMRO Bank                        USD                     97,000          Standby L/C
Malayan Banking Berhad                RM                     30,000        Bank Guarantee Facility
</TABLE>

                                   5.02(a)-1
<PAGE>   23
                                    EXHIBIT A

RECORDING REQUESTED BY
AND WHEN RECORDED, RETURN TO:
Orrick, Herrington & Sutcliffe LLP
Old Federal Reserve Bank Building
400 Sansome Street
San Francisco, CA  94111
Attn:  John Rivers, Esq.
------------------------------------------------------------------------------
                 FIRST AMENDMENT TO FACILITY 1 LEASE AGREEMENT,
         AND PARTIAL RELEASE OF DEED OF TRUST WITH ASSIGNMENT OF RENTS,
                      SECURITY AGREEMENT AND FIXTURE FILING

      THIS FIRST AMENDMENT TO FACILITY 1 LEASE AGREEMENT, AND PARTIAL RELEASE OF
DEED OF TRUST WITH ASSIGNMENT OF RENTS, SECURITY AGREEMENT AND FIXTURE FILING
(this "Amendment"), dated as of April 13, 2001, is entered into by and between:

            (1) NOVELLUS SYSTEMS, INC., a California corporation ("Lessee"); and

            (2) ABN AMRO LEASING, INC., an Illinois corporation, as lessor under
      the Facility 1 Lease Agreement (as defined below) and as trustee under the
      deed of trust contained therein ("Lessor").

                                    RECITALS

      A. Lessee, Lease Plan North America, Inc. ("Head Lessor"), Lessor, each of
the financial institutions that are parties thereto as "Participants"
("Participants"), and ABN AMRO BANK, N.V., as agent for the Participants (in
such capacity, "Agent"), are parties to that certain Participation Agreement
dated as of August 31, 1998 (as amended by a First Amendment thereto dated as of
June 4, 1999, the "Participation Agreement"), pursuant to which Lessor and
Participants have provided to Lessee two lease facilities (individually,
"Facility 1" and "Facility 2" and, collectively, the "Facilities").

        B. Pursuant to the Participation Agreement, Lessee and Lessor executed a
Facility 1 Lease Agreement, Deed of Trust with Assignment of Rents, Security
Agreement and Fixture Filing dated as of August 31, 1998, affecting certain real
property located in Santa Clara County, California, described in Exhibit A
thereto (the "Facility 1 Lease Agreement"). The Facility 1 Lease Agreement was
recorded in the Official Records of Santa Clara County, California, on September
1,1998, as Document No. 14367291.

        C. Lessee now has requested Head Lessor, Lessor, Participants and Agent
to amend the Participation Agreement and certain of the other Operative
Documents (as defined in the Participation Agreement) to (1) remove from
Facility 2 certain of the property leased to Lessee thereunder and (2) make
certain other changes.

                                      A-1
<PAGE>   24
      D. Pursuant to a Second Amendment to Participation Agreement dated as of
April 13, 2001 (the "Second Amendment to Participation Agreement") among Lessee,
Head Lessor, Lessor, Participants and Agent, Head Lessor, Lessor, Participants
and Agent have agreed to amend the Participation Agreement and the other
Operative Documents upon the terms and subject to the conditions set forth in
the Second Amendment to Participation Agreement, including without limitation,
the execution and delivery by Lessee of this Amendment.

                                    AGREEMENT

      NOW, THEREFORE, in consideration of the above recitals and for other good
and valuable consideration, the receipt and adequacy of which are hereby
acknowledged, Lessee and Lessor hereby agree as follows:

      1. DEFINITIONS, INTERPRETATION. All capitalized terms defined above and
elsewhere in this Amendment shall be used herein as so defined. Unless otherwise
defined herein, all other capitalized terms used herein shall have the
respective meanings given to those terms in Schedule 1.01 to the Participation
Agreement. The rules of construction set forth in Schedule 1.02 to the
Participation Agreement shall, to the extent not inconsistent with the terms of
this Amendment, apply to this Amendment and are hereby incorporated by
reference.

      2. AMENDMENTS TO THE FACILITY 1 LEASE AGREEMENT.

            (a) Subparagraphs 2.07(a) and 2.07(b) are hereby amended by changing
      the introductory clause "As security for the Lessee Obligations," in each
      to "As security for the Lessee Obligations under Facility 1."

            (b) Subparagraph 3.07(a) is amended to read in its entirety as
      follows:

                  (a) Lessee's Covenants. Subject to Paragraph 3.12 relating to
            permitted contests, Lessee shall not create, incur, assume or permit
            to exist any Lien or easement on or with respect to any of the
            Facility 1 Property of any character, whether now owned or hereafter
            acquired, except for the following ("Permitted Property Liens"):

                        (i) Liens in favor of a Lessor Party securing the Lessee
                  Obligations and other Lessor Liens;

                        (ii) Liens and easements in existence on the
                  Commencement Date to the extent reflected in the title
                  insurance policies delivered to Agent pursuant to Paragraph
                  3.02 of and Schedule 3.02 to the Participation Agreement and
                  approved by Lessor;

                        (iii) Liens for taxes or other Governmental Charges not
                  at the time delinquent or thereafter payable without penalty;

                        (iv) Liens of carriers, warehousemen, mechanics,
                  materialmen and vendors and other similar Liens imposed by law
                  incurred in the ordinary course of business for sums not
                  overdue;

                                      A-2
<PAGE>   25
                        (vi) Easements granted or created in connection with and
                  reasonably necessary for the construction of the New
                  Improvements as approved by Lessor; and

                        (vi) Lessor Liens.

            Subject to Paragraph 3.12 relating to permitted contests, Lessee
            shall promptly (A) pay all Indebtedness of Lessee and other
            obligations prior to the time the non-payment thereof would give
            rise to a Lien on the Facility 1 Property and (B) discharge, at its
            sole cost and expense, any Lien on the Facility 1 Property which is
            not a Permitted Facility 1 Property Lien.

            (c) Subparagraphs 5.01(e) and 5.01(h) are hereby amended by changing
      the amount "$2,500,000" wherever it appears therein to "$10,000,000".

            (d) Exhibit A is amended by releasing and deleting therefrom that
      certain portion of Part 1 (Tract 1, 3930 N. First St.) subject to Lot Line
      Adjustment Permit No. AT 00-11-150 recorded on March 8, 2001 in the
      Official Records of Santa Clara County, California, as Instrument No.
      15585476.

      3. EFFECTIVE DATE. The amendments effected by Paragraph 2 above shall
become effective on the "Effective Date" as defined in the Second Amendment to
Participation Agreement, subject to satisfaction of the conditions set forth in
Paragraph 5 thereof.

      4. EFFECT OF THIS AMENDMENT. On and after the Effective Date, each
reference in the Facility 1 Lease Agreement and the other Operative Documents to
the Facility 1 Lease Agreement shall mean the Facility 1 Lease Agreement as
amended hereby. Except as specifically amended above, (a) the Facility 1 Lease
Agreement and the other Operative Documents shall remain in full force and
effect and are hereby ratified and affirmed and (b) the execution, delivery and
effectiveness of this Amendment shall not, except as expressly provided herein,
operate as a waiver of any right, power, or remedy of Lessor, the Participants
or Agent, nor constitute a waiver of any provision of the Facility 1 Lease
Agreement or any other Operative Document.

      5. MISCELLANEOUS.

            (a) Counterparts. This Amendment may be executed in any number of
      counterparts, each of which shall be deemed an original, but all of which
      taken together shall constitute one and the same instrument. The signature
      page and acknowledgment of any counterpart may be removed therefrom and
      attached to any other counterpart to evidence execution thereof by all of
      the parties hereto without affecting the validity thereof.

            (b) Headings. Headings in this Amendment are for convenience of
      reference only and are not part of the substance hereof.

                                      A-3
<PAGE>   26
            (c) Governing Law. This Amendment shall be governed by and construed
      in accordance with the laws of the State of California without reference
      to conflicts of law rules.

                          [The signature page follows.]

                                      A-4
<PAGE>   27
        IN WITNESS WHEREOF, Lessee and Lessor have caused this Amendment to be
executed as of the day and year first above written.

LESSEE:                             NOVELLUS SYSTEMS, INC.

                                    By:_________________________________
                                        Name:____________________________
                                        Title:_____________________________

LESSOR:                             ABN AMRO LEASING, INC.

                                    By:_________________________________
                                        Name:____________________________
                                        Title:_____________________________

                                      A-5
<PAGE>   28
 STATE OF __________________________________)
                                            )
 COUNTY OF _________________________________)

               On ________ 2001, before me, _______________________, a Notary
Public in and for the State of California, personally appeared
_______________________________, personally known to me (or proved to me on the
basis of satisfactory evidence) to be the person(s) whose name(s) is/are
subscribed to the within instrument and acknowledged to me that he/she/they
executed the same in his/her/their authorized capacity(ies), and that by
his/her/their signature(s) on the instrument the person(s), or the entity upon
behalf of which the person(s) acted, executed the instrument.

               WITNESS my hand and official seal.

               [SEAL]
                        _______________________________________
<PAGE>   29
 STATE OF __________________________________)
                                            )
 COUNTY OF _________________________________)

               On ___________, 2001, before me, _______________________, a
Notary Public in and for the State of California, personally appeared
_______________________________, personally known to me (or proved to me on the
basis of satisfactory evidence) to be the person(s) whose name(s) is/are
subscribed to the within instrument and acknowledged to me that he/she/they
executed the same in his/her/their authorized capacity(ies), and that by
his/her/their signature(s) on the instrument the person(s), or the entity upon
behalf of which the person(s) acted, executed the instrument.

               WITNESS my hand and official seal.

               [SEAL]
                        _______________________________________
<PAGE>   30
                                    EXHIBIT B

RECORDING REQUESTED BY
AND WHEN RECORDED, RETURN TO:
Orrick, Herrington & Sutcliffe LLP
Old Federal Reserve Bank Building
400 Sansome Street
San Francisco, CA  94111
Attn:  John Rivers, Esq.

-------------------------------------------------------------------------------
                 FIRST AMENDMENT TO FACILITY 2 LEASE AGREEMENT,
                AND PARTIAL RELEASE OF CONSTRUCTION DEED OF TRUST
                            WITH ASSIGNMENT OF RENTS,
                      SECURITY AGREEMENT AND FIXTURE FILING

      THIS FIRST AMENDMENT TO FACILITY 2 LEASE AGREEMENT, AND PARTIAL RELEASE OF
CONSTRUCTION DEED OF TRUST WITH ASSIGNMENT OF RENTS, SECURITY AGREEMENT AND
FIXTURE FILING (this "Amendment"), dated as of April 13, 2001, is entered into
by and between:

            (1) NOVELLUS SYSTEMS, INC., a California corporation ("Lessee"); and

            (2) ABN AMRO LEASING, INC., an Illinois corporation, as lessor under
      the Facility 1 Lease Agreement (as defined below) and as trustee under the
      deed of trust contained therein ("Lessor").

                                    RECITALS

      A. Lessee, Lease Plan North America, Inc. ("Head Lessor"), Lessor,
each of the financial institutions that are parties thereto as "Participants"
("Participants"), and ABN AMRO BANK, N.V., as agent for the Participants (in
such capacity, "Agent"), are parties to that certain Participation Agreement
dated as of August 31, 1998 (as amended by a First Amendment thereto dated as of
June 4, 1999, the "Participation Agreement"), pursuant to which Lessor and
Participants have provided to Lessee two lease facilities (individually,
"Facility 1" and "Facility 2" and, collectively, the "Facilities").

      B. Pursuant to the Participation Agreement, Lessee and Lessor executed
a Facility 2 Lease Agreement, Construction Deed of Trust with Assignment of
Rents, Security Agreement and Fixture Filing dated as of August 31, 1998,
affecting certain real property located in Santa Clara County, California,
described in Exhibit A thereto (the "Facility 2 Lease Agreement"). The Facility
2 Lease Agreement was recorded in the Official Records of Santa Clara County,
California, on September 1, 1998, as Document No. 14367292.

      C. Lessee now has requested Head Lessor, Lessor, Participants and Agent to
amend the Participation Agreement and certain of the other Operative Documents
(as defined in the Participation Agreement) to (1) remove from Facility 2
certain of the property leased to Lessee thereunder and (2) make certain other
changes.

                                      B-1
<PAGE>   31
      D. Pursuant to a Second Amendment to Participation Agreement dated as of
April 13, 2001 (the "Second Amendment to Participation Agreement") among Lessee,
Head Lessor, Lessor, Participants and Agent, Head Lessor, Lessor, Participants
and Agent have agreed to amend the Participation Agreement and the other
Operative Documents upon the terms and subject to the conditions set forth in
the Second Amendment to Participation Agreement, including without limitation,
the execution and delivery by Lessee of this Amendment.

                                    AGREEMENT

      NOW, THEREFORE, in consideration of the above recitals and for other good
and valuable consideration, the receipt and adequacy of which are hereby
acknowledged, Lessee and Lessor hereby agree as follows:

      1. DEFINITIONS, INTERPRETATION. All capitalized terms defined above and
elsewhere in this Amendment shall be used herein as so defined. Unless otherwise
defined herein, all other capitalized terms used herein shall have the
respective meanings given to those terms in Schedule 1.01 to the Participation
Agreement. The rules of construction set forth in Schedule 1.02 to the
Participation Agreement shall, to the extent not inconsistent with the terms of
this Amendment, apply to this Amendment and are hereby incorporated by
reference.

      2. AMENDMENT TO THE FACILITY 2 LEASE AGREEMENT. The Facility 2 Lease
Agreement is hereby amended as follows:

            (a) Subparagraphs 2.07(a) and 2.07(b) are hereby amended by changing
      the introductory clause "As security for the Lessee Obligations," in each
      to "As security for the Lessee Obligations under Facility 2."

            (b) Subparagraph 3.07(a) is amended to read in its entirety as
      follows:

                  (a) Lessee's Covenants. Subject to Paragraph 3.12 relating to
            permitted contests, Lessee shall not create, incur, assume or permit
            to exist any Lien or easement on or with respect to any of the
            Facility 1 Property of any character, whether now owned or hereafter
            acquired, except for the following ("Permitted Property Liens"):

                        (i) Liens in favor of a Lessor Party securing the Lessee
                  Obligations and other Lessor Liens;

                        (ii) Liens and easements in existence on the
                  Commencement Date to the extent reflected in the title
                  insurance policies delivered to Agent pursuant to Paragraph
                  3.02 of and Schedule 3.02 to the Participation Agreement and
                  approved by Lessor;

                        (iii) Liens for taxes or other Governmental Charges not
                  at the time delinquent or thereafter payable without penalty;

                                      B-2
<PAGE>   32
                        (iv) Liens of carriers, warehousemen, mechanics,
                  materialmen and vendors and other similar Liens imposed by law
                  incurred in the ordinary course of business for sums not
                  overdue;

                        (vi) Easements granted or created in connection with and
                  reasonably necessary for the construction of the New
                  Improvements as approved by Lessor; and

                        (vi) Lessor Liens.

            Subject to Paragraph 3.12 relating to permitted contests, Lessee
            shall promptly (A) pay all Indebtedness of Lessee and other
            obligations prior to the time the non-payment thereof would give
            rise to a Lien on the Facility 1 Property and (B) discharge, at its
            sole cost and expense, any Lien on the Facility 1 Property which is
            not a Permitted Facility 1 Property Lien.

            (c) Subparagraphs 5.01(e) and 5.01(h) are hereby amended by changing
      the amount "$2,500,000" wherever it appears therein to "$10,000,000".

            (d) Schedule 3.03 is amended by changing the percentage "37.5%"
      appearing in clause (iii) thereof to "20.0%".

            (e) Exhibit A(2) is amended by releasing and deleting therefrom the
      property described in Part 1 (Tract 2, 3940 and 3950 N. First Street) and
      Part 3 (Tract 5, 90 Headquarters Drive), and Exhibit A(1) is amended by
      releasing and deleting therefrom that certain portion of Part 1 (Tract 1,
      3930 N. First St.) subject to Lot Line Adjustment Permit No. AT 00-11-150
      recorded on March 8, 2001 in the Official Records of Santa Clara County,
      California, as Instrument No. 15585476, all of which released and deleted
      properties are more particularly described in Exhibit A hereto.

      3. EFFECTIVE DATE. The amendments effected by Paragraph 2 above shall
become effective on the "Effective Date" as defined in the Second Amendment to
Participation Agreement, subject to satisfaction of the conditions set forth in
Paragraph 5 thereof.

      4. EFFECT OF THIS AMENDMENT. On and after the Effective Date, each
reference in the Facility 2 Lease Agreement and the other Operative Documents to
the Facility 2 Lease Agreement shall mean the Facility 2 Lease Agreement as
amended hereby. Except as specifically amended above, (a) the Facility 2 Lease
Agreement and the other Operative Documents shall remain in full force and
effect and are hereby ratified and affirmed and (b) the execution, delivery and
effectiveness of this Amendment shall not, except as expressly provided herein,
operate as a waiver of any right, power, or remedy of Lessor, the Participants
or Agent, nor constitute a waiver of any provision of the Facility 2 Lease
Agreement or any other Operative Document.

      5. MISCELLANEOUS.

            (a) Counterparts. This Amendment may be executed in any number of
      counterparts, each of which shall be deemed an original, but all of which
      taken together

                                      B-3
<PAGE>   33
      shall constitute one and the same instrument. The signature page and
      acknowledgment of any counterpart may be removed therefrom and attached to
      any other counterpart to evidence execution thereof by all of the parties
      hereto without affecting the validity thereof.

            (b) Headings. Headings in this Amendment are for convenience of
      reference only and are not part of the substance hereof.

            (c) Governing Law. This Amendment shall be governed by and construed
      in accordance with the laws of the State of California without reference
      to conflicts of law rules.

                          [The signature page follows.]

                                      B-4
<PAGE>   34
        IN WITNESS WHEREOF, Lessee and Lessor have caused this Amendment to be
executed as of the day and year first above written.

LESSEE:                             NOVELLUS SYSTEMS, INC.

                                    By:_________________________________
                                        Name:____________________________
                                        Title:_____________________________

LESSOR:                             ABN AMRO LEASING, INC.

                                    By:_________________________________
                                        Name:____________________________
                                        Title:_____________________________

                                      B-5
<PAGE>   35
 STATE OF __________________________________)
                                            )
 COUNTY OF _________________________________)

               On _________ 2001, before me, _______________________, a Notary
Public in and for the State of California, personally appeared
_______________________________, personally known to me (or proved to me on the
basis of satisfactory evidence) to be the person(s) whose name(s) is/are
subscribed to the within instrument and acknowledged to me that he/she/they
executed the same in his/her/their authorized capacity(ies), and that by
his/her/their signature(s) on the instrument the person(s), or the entity upon
behalf of which the person(s) acted, executed the instrument.

               WITNESS my hand and official seal.

               [SEAL]
                        __________________________________________
<PAGE>   36
 STATE OF __________________________________)
                                            )
 COUNTY OF _________________________________)

               On ___________, 2001, before me, _______________________, a
Notary Public in and for the State of California, personally appeared
_______________________________, personally known to me (or proved to me on the
basis of satisfactory evidence) to be the person(s) whose name(s) is/are
subscribed to the within instrument and acknowledged to me that he/she/they
executed the same in his/her/their authorized capacity(ies), and that by
his/her/their signature(s) on the instrument the person(s), or the entity upon
behalf of which the person(s) acted, executed the instrument.

               WITNESS my hand and official seal.

               [SEAL]
                        __________________________________________
<PAGE>   37
                                  EXHIBIT A TO
                 FIRST AMENDMENT TO FACILITY 2 LEASE AGREEMENT,
                AND PARTIAL RELEASE OF CONSTRUCTION DEED OF TRUST
                            WITH ASSIGNMENT OF RENTS,
                      SECURITY AGREEMENT AND FIXTURE FILING
<PAGE>   38
                                    EXHIBIT C

                               SECOND AMENDMENT TO
                         FACILITY 2 HEAD LEASE AGREEMENT

      THIS SECOND AMENDMENT TO FACILITY 2 HEAD LEASE AGREEMENT (this
"Amendment"), dated as of April 13, 2001, is entered into by and between:

            (1) LEASE PLAN NORTH AMERICA, INC., an Illinois corporation ("Head
      Lessor"); and

            (2) ABN AMRO LEASING, INC., an Illinois corporation ("Head Lessee").

                                    RECITALS

      A. Novellus Systems, Inc, ("Lessee"), Head Lessor, Head Lessee, each of
the financial institutions that are parties thereto as "Participants"
("Participants"), and ABN AMRO BANK, N.V., as agent for the Participants (in
such capacity, "Agent"), are parties to that certain Participation Agreement
dated as of August 31, 1998 (as amended by a First Amendment thereto dated as of
June 4, 1999, the "Participation Agreement"), pursuant to which Lessor and
Participants have provided to Lessee two lease facilities (individually,
"Facility 1" and "Facility 2" and, collectively, the "Facilities").

      B. Pursuant to the Participation Agreement, Head Lessee and Head Lessor
executed a Facility 2 Head Lease Agreement dated as of August 31, 1998,
affecting certain real property located in Santa Clara County, California,
described in Exhibit A thereto, as amended by a First Amendment to Facility 2
Head Lease Agreement dated as of June 4, 1999 (as so amended, the "Facility 2
Head Lease Agreement"). A memorandum of the Facility 2 Head Lease Agreement and
the First Amendment thereto were recorded in the Official Records of Santa Clara
County, California, on September 1, 1998, as Document No. 14367290 and June 4,
1999, as Document No. 14845503 respectively.

      C. Lessee now has requested Head Lessor, Head Lessee, Participants and
Agent to amend the Participation Agreement and certain of the other Operative
Documents (as defined in the Participation Agreement) to (1) remove from
Facility 2 certain of the property leased to Head Lessee thereunder and (2) make
certain other changes.

      D. Pursuant to a Second Amendment to Participation Agreement dated as of
April 13, 2001 (the "Second Amendment to Participation Agreement") among Lessee,
Head Lessor, Head Lessee, Participants and Agent, Head Lessor, Head Lessee,
Participants and Agent have agreed to amend the Participation Agreement and the
other Operative Documents upon the terms and subject to the conditions set forth
in the Second Amendment to Participation Agreement, including without
limitation, the execution and delivery by Head Lessor and Head Lessee of this
Amendment.

                                      C-1
<PAGE>   39
                                    AGREEMENT

               NOW, THEREFORE, in consideration of the above recitals and for
other good and valuable consideration, the receipt and adequacy of which are
hereby acknowledged, Lessee and Lessor hereby agree as follows:

      1. DEFINITIONS, INTERPRETATION. All capitalized terms defined above and
elsewhere in this Amendment shall be used herein as so defined. Unless otherwise
defined herein, all other capitalized terms used herein shall have the
respective meanings given to those terms in Schedule 1.01 to the Participation
Agreement. The rules of construction set forth in Schedule 1.02 to the
Participation Agreement shall, to the extent not inconsistent with the terms of
this Amendment, apply to this Amendment and are hereby incorporated by
reference.

      2.AMENDMENT TO THE FACILITY 2 HEAD LEASE AGREEMENT. The Facility 2 Head
Lease Agreement is hereby amended as follows:

               Exhibit A(2) is amended by deleting therefrom the property
        described in Part 1 (Tract 2, 3940 and 3950 N. First Street) and Part 3
        (Tract 5, 90 Headquarters Drive), and Exhibit A(1) is amended by
        deleting therefrom that certain portion of Part 1 (Tract 1, 3930 N.
        First St.) subject to Lot Line Adjustment Permit No. AT 00-11-150
        recorded on March 8, 2001 in the Official Records of Santa Clara County,
        California, as Instrument No. 15585476, all of which deleted properties
        are more particularly described in Exhibit A hereto.

      3. EFFECTIVE DATE. The amendments effected by Paragraph 2 above shall
become effective on the "Effective Date" as defined in the Second Amendment to
Participation Agreement, subject to satisfaction of the conditions set forth in
Paragraph 5 thereof.

      4. EFFECT OF THIS AMENDMENT. On and after the Effective Date, each
reference in the Facility 2 Head Lease Agreement and the other Operative
Documents to the Facility 2 Head Lease Agreement shall mean the Facility 2 Head
Lease Agreement as amended hereby. Except as specifically amended above, (a) the
Facility 2 Head Lease Agreement and the other Operative Documents shall remain
in full force and effect and are hereby ratified and affirmed and (b) the
execution, delivery and effectiveness of this Amendment shall not, except as
expressly provided herein, operate as a waiver of any right, power, or remedy of
Head Lessor, Head Lessee, the Participants or Agent, nor constitute a waiver of
any provision of the Facility 2 Head Lease Agreement or any other Operative
Document.

      5. MISCELLANEOUS.

            (a) Counterparts. This Amendment may be executed in any number of
      counterparts, each of which shall be deemed an original, but all of which
      taken together shall constitute one and the same instrument. The signature
      page and acknowledgment of any counterpart may be removed therefrom and
      attached to any other counterpart to evidence execution thereof by all of
      the parties hereto without affecting the validity thereof.

                                      C-2
<PAGE>   40
            (b) Headings. Headings in this Amendment are for convenience of
      reference only and are not part of the substance hereof.

            (c) Governing Law. This Amendment shall be governed by and construed
      in accordance with the laws of the State of California without reference
      to conflicts of law rules.

                          [The signature page follows.]

                                      C-3
<PAGE>   41
        IN WITNESS WHEREOF, Head Lessor and Head Lessee have caused this
Amendment to be executed as of the day and year first above written.

HEAD LESSOR:                        LEASE PLAN NORTH AMERICA, INC.

                                    By:_________________________________
                                        Name:____________________________
                                        Title:_____________________________

HEAD LESSEE:                        ABN AMRO LEASING, INC.

                                    By:_________________________________
                                        Name:____________________________
                                        Title:_____________________________

                                      C-4
<PAGE>   42
 STATE OF __________________________________)
                                            )
 COUNTY OF _________________________________)

               On _________ 2001, before me, _______________________, a Notary
Public in and for the State of California, personally appeared
_______________________________, personally known to me (or proved to me on the
basis of satisfactory evidence) to be the person(s) whose name(s) is/are
subscribed to the within instrument and acknowledged to me that he/she/they
executed the same in his/her/their authorized capacity(ies), and that by
his/her/their signature(s) on the instrument the person(s), or the entity upon
behalf of which the person(s) acted, executed the instrument.

               WITNESS my hand and official seal.

               [SEAL]
                        __________________________________________
<PAGE>   43
 STATE OF __________________________________)
                                            )
 COUNTY OF _________________________________)

               On ___________, 2001, before me, _______________________, a
Notary Public in and for the State of California, personally appeared
_______________________________, personally known to me (or proved to me on the
basis of satisfactory evidence) to be the person(s) whose name(s) is/are
subscribed to the within instrument and acknowledged to me that he/she/they
executed the same in his/her/their authorized capacity(ies), and that by
his/her/their signature(s) on the instrument the person(s), or the entity upon
behalf of which the person(s) acted, executed the instrument.

               WITNESS my hand and official seal.

               [SEAL]
                        __________________________________________
<PAGE>   44
                                  EXHIBIT A TO
               SECOND AMENDMENT TO FACILITY 2 HEAD LEASE AGREEMENT
<PAGE>   45
                                    EXHIBIT D

                               FIRST AMENDMENT TO
          ASSIGNMENT OF HEAD LEASE AGREEMENTS, SUBLEASE AGREEMENTS AND
                              PURCHASE AGREEMENTS

      THIS FIRST AMENDMENT TO ASSIGNMENT OF HEAD LEASE AGREEMENTS, SUBLEASE
AGREEMENTS AND PURCHASE AGREEMENTS (this "Amendment"), dated as of April 13,
2001, is entered into by and between:

            (1) ABN AMRO LEASING, INC., an Illinois corporation ("Lessor")

            (2) ABN AMRO BANK N.V., as agent for the Participants under the
      Participation Agreement referred to in Recital A below (in such capacity,
      "Agent").

                                    RECITALS

      A. Novellus Systems, Inc, ("Lessee"), Lease Plan North America, Inc.
("Head Lessor"), Lessor, each of the financial institutions that are parties
thereto as "Participants" ("Participants"), and Agent, are parties to that
certain Participation Agreement dated as of August 31, 1998 (as amended by a
First Amendment thereto dated as of June 4, 1999, the "Participation
Agreement"), pursuant to which Lessor and Participants have provided to Lessee
two lease facilities (individually, "Facility 1" and "Facility 2" and,
collectively, the "Facilities").

      B. Pursuant to the Participation Agreement, Lessor executed in favor of
Agent an Assignment Of Head Lease Agreements, Sublease Agreements And Purchase
Agreements dated as of August 31, 1998, affecting certain real property located
in Santa Clara County, California, described in Exhibit A thereto (the
"Assignment of Lease Agreements"). The Assignment of Lease Agreements was
recorded in the Official Records of Santa Clara County, California, on September
1, 1998, as Document No. 14367296.

      C. Lessee now has requested Head Lessor, Lessor, Participants and Agent to
amend the Participation Agreement and certain of the other Operative Documents
(as defined in the Participation Agreement) to (1) remove from Facility 2
certain of the property leased to Lessee thereunder and (2) make certain other
changes.

      D. Pursuant to a Second Amendment to Participation Agreement dated as of
April 13, 2001 (the "Second Amendment to Participation Agreement") among Lessee,
Head Lessor, Lessor, Participants and Agent, Head Lessor, Lessor, Participants
and Agent have agreed to amend the Participation Agreement and the other
Operative Documents upon the terms and subject to the conditions set forth in
the Second Amendment to Participation Agreement, including without limitation,
the execution and delivery by Lessor and Agent of this Amendment.

                                      D-1
<PAGE>   46
                                    AGREEMENT

               NOW, THEREFORE, in consideration of the above recitals and for
other good and valuable consideration, the receipt and adequacy of which are
hereby acknowledged, Lessor and Agent hereby agree as follows:

      1. DEFINITIONS, INTERPRETATION. All capitalized terms defined above and
elsewhere in this Amendment shall be used herein as so defined. Unless otherwise
defined herein, all other capitalized terms used herein shall have the
respective meanings given to those terms in Schedule 1.01 to the Participation
Agreement. The rules of construction set forth in Schedule 1.02 to the
Participation Agreement shall, to the extent not inconsistent with the terms of
this Amendment, apply to this Amendment and are hereby incorporated by
reference.

      2. AMENDMENT TO THE ASSIGNMENT OF LEASE AGREEMENTS. The Assignment of
Lease Agreements is hereby amended as follows:

            Exhibit A is amended by deleting therefrom the property described in
      Part 2 (Tract 2, 3940 and 3950 N. First Street), Part 5 (Tract 5, 90
      Headquarters Drive), and that certain portion of Part 1 (Tract 1, 3930 N.
      First St.) subject to Lot Line Adjustment Permit No. AT 00-11-150 recorded
      on March 8, 2001 in the Official Records of Santa Clara County,
      California, as Instrument No. 15585476, which deleted property is more
      particularly described in Exhibit A hereto.

      3. EFFECTIVE DATE. The amendments effected by Paragraph 2 above shall
become effective on the "Effective Date" as defined in the Second Amendment to
Participation Agreement, subject to satisfaction of the conditions set forth in
Paragraph 5 thereof.

      4. EFFECT OF THIS AMENDMENT. On and after the Effective Date, each
reference in the Assignment of Lease Agreements and the other Operative
Documents to the Assignment of Lease Agreements shall mean the Assignment of
Lease Agreements as amended hereby. Except as specifically amended above, (a)
the Assignment of Lease Agreements and the other Operative Documents shall
remain in full force and effect and are hereby ratified and affirmed and (b) the
execution, delivery and effectiveness of this Amendment shall not, except as
expressly provided herein, operate as a waiver of any right, power, or remedy of
Lessor, the Participants or Agent, nor constitute a waiver of any provision of
the Assignment of Lease Agreements or any other Operative Document.

      5. MISCELLANEOUS.

            (a) Counterparts. This Amendment may be executed in any number of
      counterparts, each of which shall be deemed an original, but all of which
      taken together shall constitute one and the same instrument. The signature
      page and acknowledgment of any counterpart may be removed therefrom and
      attached to any other counterpart to evidence execution thereof by all of
      the parties hereto without affecting the validity thereof.

            (b) Headings. Headings in this Amendment are for convenience of
      reference only and are not part of the substance hereof.

                                      D-2
<PAGE>   47
            (c) Governing Law. This Amendment shall be governed by and construed
      in accordance with the laws of the State of California without reference
      to conflicts of law rules.

                          [The signature page follows.]

                                      D-3
<PAGE>   48
        IN WITNESS WHEREOF, Lessor and Agent have caused this Amendment to be
executed as of the day and year first above written.

LESSOR:                             ABN AMRO LEASING, INC.

                                    By:_________________________________
                                        Name:____________________________
                                        Title:_____________________________

AGENT:                              ABN AMRO BANK N.V.

                                    By:_________________________________
                                        Name:____________________________
                                        Title:_____________________________

                                      D-4
<PAGE>   49
 STATE OF __________________________________)
                                            )
 COUNTY OF _________________________________)

               On _________ 2001, before me, _______________________, a Notary
Public in and for the State of California, personally appeared
_______________________________, personally known to me (or proved to me on the
basis of satisfactory evidence) to be the person(s) whose name(s) is/are
subscribed to the within instrument and acknowledged to me that he/she/they
executed the same in his/her/their authorized capacity(ies), and that by
his/her/their signature(s) on the instrument the person(s), or the entity upon
behalf of which the person(s) acted, executed the instrument.

               WITNESS my hand and official seal.

               [SEAL]
                        __________________________________________
<PAGE>   50
 STATE OF __________________________________)
                                            )
 COUNTY OF _________________________________)

               On ___________, 2001, before me, _______________________, a
Notary Public in and for the State of California, personally appeared
_______________________________, personally known to me (or proved to me on the
basis of satisfactory evidence) to be the person(s) whose name(s) is/are
subscribed to the within instrument and acknowledged to me that he/she/they
executed the same in his/her/their authorized capacity(ies), and that by
his/her/their signature(s) on the instrument the person(s), or the entity upon
behalf of which the person(s) acted, executed the instrument.

               WITNESS my hand and official seal.

               [SEAL]
                        __________________________________________
<PAGE>   51
                                  EXHIBIT A TO
             FIRST AMENDMENT TO ASSIGNMENT OF HEAD LEASE AGREEMENTS,
                  SUBLEASE AGREEMENTS AND PURCHASE AGREEMENTS
<PAGE>   52
                                    EXHIBIT E

                  FIRST AMENDMENT TO, SUBSTITUTION OF TRUSTEE,
                             AND PARTIAL RELEASE OF,
                           CONSTRUCTION DEED OF TRUST

      THIS FIRST AMENDMENT TO, SUBSTITUTION OF TRUSTEE, AND PARTIAL RELEASE OF,
CONSTRUCTION DEED OF TRUST (this "Amendment"), dated as of April 13, 2001, is
entered into by and between:

            (1) ABN AMRO LEASING, INC., an Illinois corporation ("Lessor")

            (2) ABN AMRO BANK N.V., as agent for the Participants under the
      Participation Agreement referred to in Recital A below (in such capacity,
      "Agent").

                                    RECITALS

      A. Novellus Systems, Inc, ("Lessee"), Lease Plan North America, Inc.
("Head Lessor"), Lessor, each of the financial institutions that are parties
thereto as "Participants" ("Participants"), and Agent are parties to that
certain Participation Agreement dated as of August 31, 1998 (as amended by a
First Amendment thereto dated as of June 4, 1999, the "Participation
Agreement"), pursuant to which Lessor and Participants have provided to Lessee
two lease facilities (individually, "Facility 1" and "Facility 2" and,
collectively, the "Facilities").

      B. Pursuant to the Participation Agreement, Lessor executed in favor of
Agent a Construction Deed Of Trust dated as of August 31, 1998, affecting
certain real property located in Santa Clara County, California, described in
Exhibit A thereto (the "Construction Deed Of Trust"). The Construction Deed Of
Trust was recorded in the Official Records of Santa Clara County, California, on
September 1, 1998, as Document No. 14367297.

      C. Lessee now has requested Head Lessor, Lessor, Participants and Agent to
amend the Participation Agreement and certain of the other Operative Documents
(as defined in the Participation Agreement) to (1) remove from Facility 2
certain of the property leased to Lessee thereunder and (2) make certain other
changes.

      D. Pursuant to a Second Amendment to Participation Agreement dated as of
April 13, 2001 (the "Second Amendment to Participation Agreement") among Lessee,
Head Lessor, Lessor, Participants and Agent, Head Lessor, Lessor, Participants
and Agent have agreed to amend the Participation Agreement and the other
Operative Documents upon the terms and subject to the conditions set forth in
the Second Amendment to Participation Agreement, including without limitation,
the execution and delivery by Lessor and Agent of this Amendment.

                                    AGREEMENT

      NOW, THEREFORE, in consideration of the above recitals and for other good
and valuable consideration, the receipt and adequacy of which are hereby
acknowledged, Lessor and Agent hereby agree as follows:

                                      E-1
<PAGE>   53
      1. DEFINITIONS, INTERPRETATION. All capitalized terms defined above and
elsewhere in this Amendment shall be used herein as so defined. Unless otherwise
defined herein, all other capitalized terms used herein shall have the
respective meanings given to those terms in Schedule 1.01 to the Participation
Agreement. The rules of construction set forth in Schedule 1.02 to the
Participation Agreement shall, to the extent not inconsistent with the terms of
this Amendment, apply to this Amendment and are hereby incorporated by
reference.

      2. SUBSTITUTION OF TRUSTEE AND PARTIAL RELEASE OF PROPERTY AND
AMENDMENT TO THE CONSTRUCTION DEED OF TRUST. Agent hereby substitutes itself as
trustee under the Construction Deed Of Trust in place of First American Title
Insurance Company. The Construction Deed Of Trust is hereby amended as follows:

            Exhibit A is amended by releasing and deleting therefrom the
      property described in Part 2 (Tract 2, 3940 and 3950 N. First Street),
      Part 5 (Tract 5, 90 Headquarters Drive), and that certain portion of Part
      1 (Tract 1, 3930 N. First St.) subject to Lot Line Adjustment Permit No.
      AT 00-11-150 recorded on March 8, 2001 in the Official Records of Santa
      Clara County, California, as Instrument No. 15585476, which released and
      deleted property is more particularly described in Exhibit A hereto.

      3. EFFECTIVE DATE. The amendments effected by Paragraph 2 above shall
become effective on the "Effective Date" as defined in the Second Amendment to
Participation Agreement, subject to satisfaction of the conditions set forth in
Paragraph 5 thereof.

      4. EFFECT OF THIS AMENDMENT. On and after the Effective Date, each
reference in the Construction Deed Of Trust and the other Operative Documents to
the Construction Deed Of Trust shall mean the Construction Deed Of Trust as
amended hereby. Except as specifically amended above, (a) the Construction Deed
Of Trust and the other Operative Documents shall remain in full force and effect
and are hereby ratified and affirmed and (b) the execution, delivery and
effectiveness of this Amendment shall not, except as expressly provided herein,
operate as a waiver of any right, power, or remedy of Head Lessor, Lessor, the
Participants or Agent, nor constitute a waiver of any provision of the
Construction Deed Of Trust or any other Operative Document.

      5. MISCELLANEOUS.

            (a) Counterparts. This Amendment may be executed in any number of
      counterparts, each of which shall be deemed an original, but all of which
      taken together shall constitute one and the same instrument. The signature
      page and acknowledgment of any counterpart may be removed therefrom and
      attached to any other counterpart to evidence execution thereof by all of
      the parties hereto without affecting the validity thereof.

            (b) Headings. Headings in this Amendment are for convenience of
      reference only and are not part of the substance hereof.

            (c) Governing Law. This Amendment shall be governed by and construed
      in accordance with the laws of the State of California without reference
      to conflicts of law rules.

                                      E-2
<PAGE>   54
        IN WITNESS WHEREOF, Lessor and Agent have caused this Amendment to be
executed as of the day and year first above written.

LESSOR:                             ABN AMRO LEASING, INC.

                                    By:_________________________________
                                        Name:____________________________
                                        Title:_____________________________

AGENT AND                           ABN AMRO BANK N.V.
SUBSTITUTED TRUSTEE:
                                    By:_________________________________
                                        Name:____________________________
                                        Title:_____________________________

                                      E-3
<PAGE>   55
 STATE OF __________________________________)
                                            )
 COUNTY OF _________________________________)

               On _________ 2001, before me, _______________________, a Notary
Public in and for the State of California, personally appeared
_______________________________, personally known to me (or proved to me on the
basis of satisfactory evidence) to be the person(s) whose name(s) is/are
subscribed to the within instrument and acknowledged to me that he/she/they
executed the same in his/her/their authorized capacity(ies), and that by
his/her/their signature(s) on the instrument the person(s), or the entity upon
behalf of which the person(s) acted, executed the instrument.

               WITNESS my hand and official seal.

               [SEAL]
                        __________________________________________
<PAGE>   56
 STATE OF __________________________________)
                                            )
 COUNTY OF _________________________________)

               On ___________, 2001, before me, _______________________, a
Notary Public in and for the State of California, personally appeared
_______________________________, personally known to me (or proved to me on the
basis of satisfactory evidence) to be the person(s) whose name(s) is/are
subscribed to the within instrument and acknowledged to me that he/she/they
executed the same in his/her/their authorized capacity(ies), and that by
his/her/their signature(s) on the instrument the person(s), or the entity upon
behalf of which the person(s) acted, executed the instrument.

               WITNESS my hand and official seal.

               [SEAL]
                        __________________________________________
<PAGE>   57
                                  EXHIBIT A TO
                  FIRST AMENDMENT TO, SUBSTITUTION OF TRUSTEE,
               AND PARTIAL RELEASE OF, CONSTRUCTION DEED OF TRUST

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