Document:

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                                                                   EXHIBIT 10.26

                  SECOND AMENDMENT TO STANDARD INDUSTRIAL LEASE

       This Second Amendment to Standard Industrial Lease ("Second Amendment")
is made to be effective the 1st day of May, 2000 by and between The Klokke
Corporation, a California Corporation ("Lessor") and Silicon Valley Group, Inc.,
a California Corporation ("Lessee").

                                    RECITALS

      THIS SECOND AMENDMENT IS MADE WITH REFERENCE TO THE FOLLOWING FACTS:

       A. By that certain Lease, made February 7, 1985, Lessor leased to Thermco
Systems, Inc. ("Thermco") and Thermco leased from Lessor those certain premises
(the "original Premises") commonly known as 1482 North Batavia Street, City of
Orange, State of California and including approximately 76,860 square feet of
office and industrial space comprising an entire building and as more
particularly described in said Lease. The Lease was amended by that certain
First Amendment to Standard Industrial Lease dated November 14, 1989 which
extended the termination date of the Lease to September 30, 1999 ("Lease
Expiration Date").

       B. Thermco thereafter merged into Lessee and Lessee entered into a
sublease with CHAMPION INDUSTRIES as described in Recital D below.

       C. Lessor and Lessee agree that from and after May 1, 2000 Lessee shall
occupy only a portion of said Original Premises comprising approximately 50,580
square feet, being the space cross-hatched in red on Exhibit A hereto (the
"Thermco Premises" hereafter).

       D. Lessor and Lessee agree that the remaining space of the Original
Premises, comprising about 26,280 square feet (the "Champion Space"), heretofore
occupied by CHAMPION Industries under a sublease with Lessee, shall be rented
directly by Lessor to CHAMPION INDUSTRIES effective May 1, 2000. The sublease
shall end concurrently.

       E. Lessor and Lessee desire to extend the Lease Expiration Date relative
to the Thermco Premises to September 30, 2004 ("Extended Term") on the terms and
conditions set forth in this Second Amendment if CHAMPION INDUSTRIES leases the
Champion Space for the same time period and on comparable terms and conditions.

       F. Lessee shall be provided one (1) option to extend the Lease Term for
the Thermco Premises for an additional term of five years commencing when the
renewal term expires on September 30, 2004, which renewal will be contingent on
CHAMPION INDUSTRIES or a successor approved by Lessor renewing its tenancy as to
the Champion Space.

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       NOW, THEREFORE, in consideration of the mutual covenants herein
contained, the mutual covenants contained in the Lease and the consideration set
forth below, the parties incorporate the foregoing Recitals and also agree as
follows:

       1. THERMCO PREMISES. The location leased to Lessee from and after May
1,2000 shall be approximately 50,580 square feet of industrial warehouse space
located at 1482 North Batavia Street, Orange, California (the "Thermco Premises"
described in Recital A above).

       2. Term. The current term of the Lease between Lessor and Lessee is
hereby extended until September 30,2004 but as to the Thermco Premises only.

       3. RENT.

          (a)  The minimum monthly rent provided for under the Lease (the "Base
               Rent") for the Thermco Premises commencing May 1, 2000 shall be
               at a rate of $30,348.00 ($0.60 per square foot) per mouth plus
               additional charges set forth in the Lease.

               The Base Rent shall be subject to adjustment during the current
               term of the Lease as extended by this Second Amendment on the
               following dates ("Adjustment Date"):
               (i) May 1, 2001
               (ii) May 1, 2002
               (iii) May 1, 2003.

          (c)  On each Adjustment Date, the Base Rent shall be increased by a
               percentage equal to the annual increase in the Consumer Price
               Index Pacific Cities and U.S. Average for all "Urban Consumers"
               in the Los Angeles-Long Beach-Anaheim areas 1980=100 or if such
               index is no longer in use, such similar index as is reasonably
               chosen by Lessor ("Index") as computed in the following manner:

               (i)   On the May 1,2001 Adjustment Date, the Base Rent shall be
                     increased by the percentage increase in the Index as
                     measured from the month of April 2000 to the month of March
                     2001 (i.e., the Base Rent beginning on the Adjustment Date
                     shall equal the Base Rent for the month prior to the
                     Adjustment Date plus an amount equal to that Base Rent
                     amount multiplied by a number where the numerator is the
                     Index at the beginning of the measurement period and the
                     denominator is the Index at the end of the measurement
                     period).

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               (ii)  On the May 1,2002 Adjustment Date, the Base Rent shall be
                     increased by the percentage increase in the Index as
                     measured from the month of April 2001 to the month of March
                     2002 using the method described in subsection (i) of this
                     Paragraph 3(c).

               (iii) On the May 1,2003 Adjustment Date, the Base Rent shall be
                     increased by the percentage increase in the Index as
                     measured from the month of April 2002 to the month of March
                     2003 using the method described in subsection (i) of this
                     Paragraph 3(c).

       4. OPTION TO EXTEND.

          (a)  Grant of Option. Lessor hereby grants to Lessee one (1) option to
               extend the term of said Lease as it is stipulated in this Second
               Amendment; said option to extend shall be for an additional term
               of five (5) years. If the option to extend is exercised by
               Lessee, then the option term shall commence at the expiration of
               the current Lease Term. Said option shall be solely for the
               Thermco Premises and shall be valid only if either (i) CHAMPION
               INDUSTRIES timely exercises a like renewal option as to the
               Champion Space; or (ii) Lessee exercises its Right of First
               Refusal as set forth in Paragraph 7(a) hereof.

          (b)  Exercise of Option. Lessee may exercise the option to extend by
               giving Lessor written notice of intent to extend not later than
               April 1, 2004.

          (c)  Lease Term for Option. if the option is exercised by Lessee, the
               Base Rent shall be adjusted in accordance with the mechanism set
               forth in Paragraph 2(c) above on May 1, 2004; May 1, 2005; May 1,
               2006; May 1, 2007; May 1, 2008; and May 1, 2009. That option term
               would end on September 30, 2009.

       5. CAM CHARGES.

          (a)  Pro-rata Share. Lessee shall pay to Lessor, in addition to Base
               Rent, Lessee's pro-rata share for the above-referenced Thermco
               Premises. The current total CAM charges for the Original Premises
               is $1,135.96.

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          (b)  CAM-Method of Calculation The pro-rata share shall be calculated
               as follows:

               Occupied Square Footage/Total Square Footage x 100=Pro-rata share
                         50,580 sq. ft./76,860 sq. ft. x 100 = 66%

          (c)  CAM Amount. Lessee's initial pro-rata share of the CAM charges,
               effective as of May 1, 2000, is $749.97 per month.

          (d)  Lessor represents that the pro-rata share is a fair approximation
               of the expenses allocable to tenants in the Original Premises. In
               the event that, for any particular expense, a pro-rata allocation
               does not result in an equitable allocation of CAM charges, Lessor
               shall have the right (and Lessee shall have the right to request
               of Lessor) to apportion such CAM charges on an equitable basis.

       6. UTILITY USAGE.

          (a)  Lessee and CHAMPION Industries shall be jointly and severally
               liable for all utility costs attributable to the Thermco Premises
               and the Champion Space. They may divide the cost among themselves
               as they decide, but each remains fully liable to Lessor should
               some utility payment not be timely made. Such joint and several
               liability shall not apply as between Lessee and any occupant of
               the Champion Space other than CHAMPION INDUSTRIES or any company
               affiliated with CHAMPION INDUSTRIES.

          (b)  Lessee shall promptly undertake a review and thereafter with
               CHAMPION INDUSTRIES implement reasonable changes in policy for
               the turning off of lights and other utilities after normal
               business hours, both as to the Thermco Premises and the Champion
               Space.

       7. TERMINATION OF LEASE/RIGHT OF FIRST REFUSAL.

          (a)  First Right of Refusal. In the event that CHAMPION INDUSTRIES (i)
               defaults on its tenancy obligations as they pertain to the
               Champion Space and vacates possession, (ii) fails to exercise its
               right to extend the lease as referred to in Recital F of this
               Second Amendment or (iii) seeks to sublease any or all of the
               Champion Space and Lessor has a right to recapture such portion
               of the Champion Space, then Lessee shall have a right of first
               refusal ("Right of First Refusal") to take possession of the
               Champion Space (or such portion as may be recaptured) on the
               following terms and conditions:

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               (x)   Lessor shall provide written notice to Lessee that one of
                     the events described in subsections (i) through (iii) of
                     Paragraph 7(a) of this Second Amendment has occurred no
                     later than fifteen (15) days following the occurrence of
                     such event ("Lessor Notice").

               (y)   Lessee, no later than fifteen (15) days following receipt
                     by Lessee of the Lessor Notice, shall provide written
                     notice to Lessor as to whether Lessee intends to exercise
                     its Right of First Refusal.

               (z)   In the event Lessee timely notifies Lessor that it will
                     exercise its rights to the Champion Space, the new lease
                     between Lessor and Lessee for the Champion Space (or in the
                     event of a sublease by CHAMPION INDUSTRIES, the recaptured
                     portion of the Champion Space) shall be on the same terms
                     and conditions (including any renewal/option rights) as the
                     lease for the Champion Space between CHAMPION INDUSTRIES
                     and Lessor referred to in Recital E of this Second
                     Amendment.

          (b)  Termination of Lease. In the event that Lessee does not timely
               exercise the right of first refusal for the Champion Space as
               described in subsections (i) and (ii) of Paragraph 7(a) hereof,
               Lessor shall have the right to terminate this Lease with Lessee
               by giving Lessee a sixty (60) day written notice to vacate.

       8. ABSENCE OF DEMISING WALL. Lessee acknowledges: (a) that there is no
demising wall or other physical partition between the Thermco Premises and the
Champion Space; b) that Lessor possesses no obligation to erect or pay for any
such demising wall or other physical partition; and (c) that Lessee shall have
no affirmative claims against Lessor or defenses to claims for sums due under
this Lease to Lessor by virtue of the proximity of or trespasses by personnel or
invitees of CHAMPION INDUSTRIES and/or any other conduct by CHAMPION INDUSTRIES.
By way of example and not limitation, if the utilities are disconnected by some
negligent behavior of someone employed by CHAMPION INDUSTRIES, Lessee shall have
no recourse against Lessor relative thereto and shall receive no offset or
reduction in its rental or other obligations under this Lease.

       9. RESTRICTION ON ASSIGNMENT: PROHIBITION AGAINST SUBLEASING.

       Paragraph 12 of the Lease is hereby modified in the following
particulars:

          (a)  any right of assignment granted Lessee therein is now restricted
               to the Thermco Premises; and

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          (b)  the right to sublease the Thermco Premises shall be subject to
               the Lessor's consent, not to be unreasonably withheld to a
               subtenant who will agree to be bound by all of the occupancy
               terms applicable to Lessee under the Lease as amended through the
               date of such subletting.

       10. SECURITY GUARD. Neither Lessee nor CHAMPION INDUSTRIES shall be
entitled to station any security guard outside of the former Original Premises
except under a program approved in writing by both of those entities and Lessor.

       11. DISPUTES BETWEEN LESSEE AND CHAMPION INDUSTRIES. Lessee agrees that
--before undertaking any litigation with CHAMPION INDUSTRIES on any subject
pertaining to the former Original Premises or the rights and/or obligations of
Lessee and CHAMPION INDUSTRIES as tenants of a portion of such Original Premises
- Lessee will do the following:

          (a)  notify Alden Management Group ("Alden") as Lessor's property
               manager in writing of the nature of the dispute at least twenty
               (20) days in advance of filing litigation (except for matters
               requiring emergency injunctive relief) which notification shall
               be subject to such confidentiality requirements as Lessee deems
               necessary; and

          (b)  submit to mediation with Alden or its designee as mediator at a
               date Alden specifies, which shall be within the 20-day period
               described in Paragraph 11(a) of this Second Amendment or as soon
               thereafter as reasonably possible for all concerned.

       12. OTHER RIGHTS AND OBLIGATIONS TO BE AFFECTED BY ARRANGEMENTS WITH
CHAMPION INDUSTRIES. The provisions of the Lease pertaining to the tenant's
rights and obligations relative to insurance, condemnation, signage and parking
shall require Lessee and CHAMPION INDUSTRIES jointly to abide by the obligations
and act reasonably in deciding how to apportion between them the applicable
rights involved.

       13. DAMAGE OR DESTRUCTION. Notwithstanding any other provision hereof,
the damage and destruction provisions (Paragraphs 9.1 through 9.8) of the Lease
shall be understood to apply to the former Original Premises (the total space
included in the Thermco Premises and the Champion Space). Consequently, if any
termination is to occur, it shall apply to the whole of such Original Premises;
and neither Lessee nor CHAMPION INDUSTRIES can terminate its tenancy because of
damage or destruction without obtaining the consent of the other to terminate
the latter's occupancy as well.

       14. BROKERAGE COMMISSION/FINDER'S FEE. Except for a brokerage commission
payable by Lessor to Alden, there shall be no broker's commission or finder's
fee payable as a result of the

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execution of this Second Amendment or the companion rental agreement between
Lessor and CHAMPION INDUSTRIES, nor as a result of the transactions embodied or
described therein.

       15. LEASE IN FULL FORCE AND EFFECT. Except as otherwise specifically
indicated herein, all terms and conditions of the Lease, the First Amendment and
the Second Amendment, as they may be amended from time to time by the parties in
accordance with the provisions of the Lease, shall remain in full force and
effect and shall apply during the option terms. Except as modified hereby, the
Lease as amended by the First Amendment remains in full force and effect.

ACCEPTED AND AGREED:
LESSOR:                            LESSEE:
The Klokke Corporation,            Silicon Valley Group, Inc.,
a California Corporation           a California Corporation

By /s/ Karl C. Klokke              By /s/ Russell Weinstock
   -----------------------            --------------------------------
Title: President                      Title: Vice President of Finance
      --------------------                   -------------------------

                                       7<PAGE>   1
                                                                   EXHIBIT 10.27

                            FIRST AMENDMENT TO LEASE

       THIS FIRST AMENDMENT TO LEASE is dated for reference purposes only as
January 24, 2000, and is part of that Lease dated January 9, 1996 together with
the Summary of Basic Lease Terms, the First Addendum To Lease, the Acceptance
Agreement thereto (collectively, the "Lease") by and between AMB Property, L-P,
a Delaware limited partnership, successor-in-interest to AMB/SJ/CIF Limited
Partnership, a Delaware limited partnership ("Landlord"), and Silicon Valley
Group, Inc., a Delaware corporation ("Tenant"), and is made with reference to
the following facts:

       A. The Premises currently leased by Tenant pursuant to the Lease consists
of 40,647 rentable square feet commonly known as 1945 Lundy Avenue, City of San
Jose, California.

       B. The Lease Term for said Premises currently expires on May 31, 2000.

       C. Tenant and Landlord wish to amend the Lease on the Terms and
Conditions set forth in this First Amendment to Lease.

       NOW, THEREFORE, Landlord and Tenant hereby agree that the Lease Terms are
amended as follows:

          1. Landlord's Name: The Lease is hereby amended to reflect change in
ownership of the above-referenced Premises to AMB Property, L.P., a Delaware
limited partnership.

          2. Landlord's Address: Landlord's address for notices is amended to
read:

                       AMB Property L.P.
                       505 Montgomery Street
                       6th Floor
                       San Francisco, CA 94111

          3. Lease Term: Section J is hereby amended to provide that the Lease
Term shall be extended through and including May 31, 2005.

          4. Base Monthly Rent; Commencing June 1, 2000, Section K is hereby
amended to provide for the Base Monthly Rent as follows:

       June 1, 2000 through and including May 31, 2001: $23,981.73 per month
       June 1, 2001 through and including May 31, 2002: $24,794.67 per month
       June 1, 2002 through and including May 31, 2003: $25,607.61 per month
       June 1, 2003 through and including May 31, 2004: $26,420.55 per month
       June 1, 2004 through and including May 31, 2005: $27,233.49 per month

          5. Security Deposit: Section M is hereby amended to provide for an
increase in the Security Deposit of $10,080.49 which Tenant has provided
Landlord upon signature hereon, for a total of $27,233.49.

          6. Option to Extend Lease Term: Landlord hereby grants to Tenant one
option to extend the Lease Term for a five (5) year term commencing when the
prior term expires, under the following terms and conditions:

             A Exercise Dates: Tenant must give Landlord notice in writing of
its exercise of the option in question no earlier than one hundred eighty (180)
days before the date the Lease Term would end but for said exercise (the
"Earliest Exercise Date") and no later than one hundred twenty (120) days before
the date the Lease Term would end but for said exercise (the "Last Exercise
Date").

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FIRST AMENDMENT TO LEASE
Page 2

             B. Conditions to Exercise of Option: Tenant's right to extend is
conditioned upon and subject to each of the following:

                (1) In order to exercise its option to extend, Tenant must give
written notice of such election to Landlord and Landlord must receive same by
the last Exercise Date, but not prior to the Earliest Exercise Date. If proper
notification of the exercise of an option is not given and/or received, such
option shall automatically expire. Failure to exercise an option terminates that
option and all subsequent options. Tenant acknowledges that because of the
importance of Landlord of knowing no later than the Last Exercise Date whether
or not Tenant will exercise the option, the failure of Tenant to notify Landlord
by the Last Exercise Date will conclusively be presumed an election by Tenant
not to exercise the option.

                (2) Tenant shall have no right to exercise an option (i) if
Tenant is in Default beyond any cure period provided in the Lease (if
applicable) either on the date of exercise of the option or on the date on which
the Lease would terminate absent exercise of the option or (ii) in the event
that Landlord has given to Tenant three (3) or more notices of separate Default
during the 12 month period immediately preceding the exercise of the option,
whether or not the Defaults are cured. The period of time within which an option
may be exercised shall not be extended or enlarged by reason of Tenants
inability to exercise an option because of the provisions of this Paragraph.

             C. Creation of Extended Term: Upon the timely exercise of the
option to extend and the commencement of the extended Term, all references in
the Lease to the Term shall be considered to mean the Term as extended by the
exercise of the option, which shall be referred to herein as the "Extended
Term".

             D. Options Personal: The option is personal to the Tenant, and
cannot be assigned to or exercised by anyone other than the Tenant. The option
can only he exercised at a time when the Tenant is in full possession of the
Premises and does not have any intent of thereafter assigning or subletting.

             E. The Base Monthly Rent for the Option Period shall be the greater
of (i) one hundred percent (100%) of the Base Monthly Rent due the last month of
the previous Lease Term, or (ii) one hundred percent (100%) of the then fair
market monthly rent determined as of the commencement of the option period in
question based upon like buildings with like improvements in the area within the
boundaries of Highways 101, 237, and 880. The Option Period shall contain no
free rent and the Premises shall be taken "as-is". if the parties are unable to
agree upon the fair market monthly rent for the Premises for the option period
in question at least seventy-five (75) days prior to the commencement of the
option period in question, then the fair market monthly rent shall be determined
by appraisal conducted pursuant to subparagraph F.

             F. In the event it becomes necessary to determine by appraisal the
fair market rent of the Premises for the purpose of establishing the Base
Monthly Rent during the Option Period, then such fair market monthly rent shall
be determined by three (3) real estate appraisers, all of whom shall be members
of the American Institute of Real Estate Appraisers with not less than five (5)
years experience appraising real property (other than residential or
agricultural property) located in Santa Clara County, California, in accordance
with the following procedures:

                (1) The party demanding an appraisal (the 'Notifying Party")
shall notify the other party (the "Non-Notifying Party") thereof by delivering a
written demand for appraisal, which demand, to be effective, must give the name
address, and qualifications of an appraiser selected by the Notifying Party.
Within ten (10) days of receipt of said demand, the Non-Notifying Party shall
select its appraiser and notify the Notifying Party, in writing, of the name,
address, and qualifications of an appraiser selected by it. Failure by the
Non-Notifying Party to select a qualified appraiser within said ten (10) day
period shall be deemed a waiver of its right to select a second appraiser on its
own behalf and the Notifying Party shall select a second

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FIRST AMENDMENT TO LEASE
Page 3

appraiser on behalf of the Non-Notifying Party within five (5) days after the
expiration of said ten (10) day period. Within ten (10) days from the date the
second appraiser shall have been appointed, the two (2) appraisers so selected
shall appoint a third appraiser. If the two appraisers fail to select a third
qualified appraiser, the third appraiser shall be selected by the American
Arbitrations Association or if it shall refuse to perform this function, then at
the request of either Landlord or Tenant, such third appraiser shall be promptly
appointed by the then Presiding Judge of the Superior Court of the State of
California for the County of Santa Clara.

                (2) The three (3) appraisers so selected shall meet in San Jose,
California, not later than twenty (20) days following the selection of the third
appraiser. At said meeting the appraisers so selected shall attempt to determine
the fair market monthly rent of the Premises for the option period in question
(including the timing and amount of periodic increases).

                (3) if the appraisers so selected are unable to complete their
determinations in one meeting they may continue to consult at such times as they
deem necessary for a fifteen (15) day period from the date of the first meeting,
in an attempt to have at least two (2) of them agree. If, at the initial meeting
or at any time during said fifteen (15) day period, two (2) or more of the
appraisers so selected agree on the fair market rent of the Leased Premises,
such agreement shall be determinative and binding on the patties hereto, and the
agreeing appraisers shall, in simple letter form executed by the agreeing
appraisers, forthwith notify both Landlord and Tenant of the amount set by such
agreement.

                (4) if two (2) or more appraisers do not so agree within said
fifteen (15) day period, then each appraiser shall, within five (5) days after
the expiration of said fifteen (15) day period, submit his independent appraisal
in simple letter form to Landlord and Tenant stating his determination of the
fair market rent of the Premises for the option period in question. The parties
shall then determine the fair market rent for the Premises by determining the
average of the fair market rent set by each of the appraisers. However, if the
lowest appraisal is less than eighty-five percent (85%) of the middle appraisal
then such lowest appraisal shall be disregarded and/or if the highest appraisal
is greater then one hundred fifteen percent (115%) of the middle appraisal then
such highest appraisal shall be disregarded. If the fair market rent set by any
appraisal is so disregarded, then the average shall be determined by computing
the average set by the other appraisals that have not been disregarded.

                (5) Nothing contained herein shall prevent Landlord and Tenant
from jointly selecting a single appraiser to determine the fair market rent of
the Premises, in which event the determination of such appraisal shall be
conclusively deemed the fair market rent of the Premises.

                (6) Each party shall bear the fees and expenses of the appraiser
selected by or for it, and the fees and expenses of the third appraiser (or the
joint appraiser if one joint appraiser is used) shall be borne fifty percent
(50%) by Landlord and fifty percent (50%) by Tenant.

          7. Retained Real Estate Brokers: Section S is amended to provide that
Tenant is represented exclusively by BT Commercial and Orchard Properties
represents the Landlord in this transaction.

          8. Condition of Premises: Tenant is fully familiar with the Premises
by way of its occupancy and accepts the Premises for the extended term created
hereby in their as-is condition, with all latent and patent faults, without
warranty or obligation on the part of Landlord to provide or pay for any
interior improvements or tenant improvement allowances.

          9. Year 2000 Disclaimer. Landlord hereby disclaims any liability for
any and all damages, injuries or other losses, whether ordinary, special,
consequential, punitive or otherwise, arising out of, relating to, or in
connection with, (a) the failure of any automated,

<PAGE>   4
FIRST AMENDMENT TO LEASE
Page 4

computerized and/or software system or other technology used in, on, or about
the Property or relating to the management or operation of the Property to
accurately receive, provide or process date/time data (including, but not
limited to, calculating, comparing and sequencing) both before and after
September 9, 1999, and before, after, during and between the years 1999 A. D.
and 2000 A. D., and leap year calculations and, or (b) the malfunction, ceasing
to function or providing of invalid or incorrect results by any such technology
as a result of date/time data. The foregoing disclaimer shall apply to any such
technology used in, on, or about the Property or that affects the Property,
whether or not such technology is within the control of Owner or any of Owner's
agents or representatives. THE FOREGOING DISCLAIMER INCLUDES A DISCLAIMER OF ALL
WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED, WITH RESPECT TO THE MATTERS
DESCRIBED HEREIN, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS
FOR A PARTICULAR PURPOSE.

          10. Continuing Obligation: Except as expressly set forth in this
Amendment, all terms and conditions of the Lease remain in full force and
effect, and all terms and conditions of the Lease are incorporated herein as
though set forth at length.

          11. Effect of Amendment: This Amendment modifies the Lease In the
event of any conflict or discrepancy between the Lease and/or any other previous
documents between the parties and the provisions of this Amendment, then the
provisions of this Amendment shall control. Except as modified herein, the Lease
shall remain in full force and effect.

          12. Authority: Each individual executing this Amendment on behalf of
Tenant represents and warrants that he or she is duly authorized to and does
execute and deliver this Amendment pursuant to express authority from Tenant
pursuant to and in accordance with the By-Laws and the other organic documents
of the Tenant corporation.

          13. Entire Agreement: The Lease, as modified by this Amendment,
constitutes and contains the entire agreement between the parties, and there are
no binding agreements or representations between the parties except as expressed
herein. Tenant acknowledges that neither Landlord nor Landlord's Agents have
made any legally binding representations or warranties as to any matter except
for such matters binding representations or warranties as to any matter except
for such matters which are expressly set forth herein, including any
representations or warranties relating to the condition of the Premises or the
improvements thereto or the suitability of the Premises or the Project for
Tenant's business.

       IN WITNESS WHEREOF, Landlord and Tenant have executed this First
Amendment to be effective as of the date first set forth above.

LANDLORD:                                    TENANT:

AMB Property, L.P.                           Silicon Valley Group, Inc
a Delaware limited partnership               a Delaware corporation
By   AMB Property Corporation
a Maryland corporation,
its general partner

By: /s/ John Rossi                           By: /s/ Boris Lipkin
    --------------------------                   -----------------------
    Vice President                           Corporate Vice President
    --------------------------               ---------------------------

Date: 2/24/00                                Date:  2/11/00

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