Document:

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                                                                     EXHIBIT 4.5

                          AMENDMENT TO RIGHTS AGREEMENT

1.      GENERAL BACKGROUND. In accordance with Section 27 of the Rights
        Agreement between Bank Boston, N.A. (the "Rights Agent") and Asyst
        Technologies, Inc. dated June 25, 1998 (the "Agreement"), the Rights
        Agent and Asyst Technologies, Inc. desire to amend the Agreement to
        appoint EquiServe Trust Company, N.A.

2.      EFFECTIVENESS. This Amendment shall be effective as of 11/30/01
        (the "Amendment") and all defined terms and definitions in the Agreement
        shall be the same in the Amendment except as specifically revised by the
        Amendment.

3.      REVISION. The section in the Agreement entitled "Change of Rights Agent"
        is hereby deleted in its entirety and replaced with the following:

        Change of Rights Agent. The Rights Agent or any successor Rights Agent
        may resign and be discharged from its duties under this Agreement upon
        30 days' notice in writing mailed to the Company and to each transfer
        agent of the Common Shares or Preferred Shares by registered or
        certified mail and to the holders of the Right Certificates by
        first-class mail. The Company may remove the Rights Agent or any
        successor Rights Agent upon 30 days' notice in writing mailed to the
        Rights Agent or successor Rights Agent, as the case may be, and to each
        transfer agent of the Common Shares or Preferred Shares by registered or
        certified mail, and to the holders of the Right Certificates by
        first-class mail. If the Rights Agent shall resign or be removed or
        shall otherwise become incapable of acting, the Company shall appoint a
        successor to the Rights Agent. If the Company shall fail to make such
        appointment within a period of 30 days after giving notice of such
        removal or after it has been notified in writing of such resignation or
        incapacity by the resigning or incapacitated Rights Agent or by the
        holder of a Right Certificate (who shall, with such notice, submit such
        holder's Right Certificate for inspection by the Company), then the
        registered holder of any Right Certificate may apply to any court of
        competent jurisdiction for the appointment of a new Rights Agent. Any
        successor Rights Agent, whether appointed by the Company or by such a
        court, shall be a corporation or trust company organized and doing
        business under the laws of the United States, in good standing, which is
        authorized under such laws to exercise corporate trust or stock transfer
        powers and is subject to supervision or examination by federal or state
        authority and which has individually or combined with an affiliate at
        the time of its appointment as Rights Agent a combined capital and
        surplus of at least $100 million dollars. After appointment, the
        successor Rights Agent shall be vested with the same powers, rights,
        duties and responsibilities as if it had been originally named as Rights
        Agent without

<PAGE>

        further act or deed; but the predecessor Rights Agent shall deliver and
        transfer to the successor Rights Agent any property at the time held by
        it hereunder, and execute and deliver any further assurance, conveyance,
        act or deed necessary for the purpose. Not later than the effective date
        of any such appointment the Company shall file notice thereof in writing
        with the predecessor Rights Agent and each transfer agent of the Common
        Shares or Preferred Shares, and mail a notice thereof in writing to the
        registered holders of the Right Certificates. Failure to give any notice
        provided for in this Section 21, however, or any defect therein, shall
        not affect the legality or validity of the resignation or removal of the
        Rights Agent or the appointment of the successor Rights Agent, as the
        case may be.

4.      Except as amended hereby, the Agreement and all schedules or exhibits
        thereto shall remain in full force and effect.

IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be executed
in their names and on their behalf by and through their duly authorized
officers, as of this 30th day of November, 2001.

Asyst Technologies, Inc.                      Bank Boston, N.A.

        /s/ GEOFFREY G. RIBAR                        /s/ CAROL MULVEY-EORI
        ------------------------                     ---------------------------
By:     Geoffrey G. Ribar                     By:    Carol Mulvey-Eori
Title:  Senior Vice President                 Title: Managing Director,
        Chief Financial Officer                      Client Administration

                                              EquiServe Trust Company, N.A.

                                                     /s/ CAROL MULVEY-EORI
                                                     ---------------------------
                                              By:    Carol Mulvey-Eori
                                              Title: Managing Director,
                                                     Client Administration<PAGE>
                                                                   EXHIBIT 10.35

                      [ASYST TECHNOLOGIES, INC. LETTERHEAD]

February 28, 2002

Mr. Dennis Riccio
4210 Remillard Court
Pleasanton, CA  94566

RE:     EMPLOYMENT SEPARATION AGREEMENT

Dear Dennis:

        This letter sets forth the substance of the separation agreement (the
"Agreement") that Asyst Technologies, Inc. (the "Company") is offering to you to
aid in your employment transition.

        1. SEPARATION AND TRANSITION PERIOD. The Company agrees to accept your
resignation as Senior Vice President of Worldwide Sales and Service, and from
any other offices or positions you hold with the Company or any affiliated
entity (with the exception of your non-officer position as Sales and Customer
Operations Manager of the Company during the Transition Period), effective as of
January 7, 2002 (the "Resignation Date"). From the Resignation Date until the
earlier of: (i) October 19, 2002; (ii) the date you materially breach any
obligation under this Agreement or your Proprietary Information and Inventions
Agreement; or (iii) the date you engage in any activity competitive with or
detrimental to the interests of the Company (the "Separation Date"), you will be
a regular, part-time employee of the Company in the position of Sales and
Customer Operations Manager (the "Transition Period"), for which you will be
paid at a rate of one hundred dollars ($100) per hour, less standard deductions
and withholdings. During the Transition Period: (i) you will not serve as an
officer of the Company; and (ii) you will make yourself available at least ten
(10) hours per month, and for additional time if needed by the Company and if it
does not unreasonably interfere with your obligations to another employer, up to
a maximum of twenty (20) hours per month, to provide transition assistance to
the Company and its new sales leaders for the Company's Fab Solutions/Equipment
Solutions and OEM organizations, to provide assistance with regard to sales
efforts for key customers of the Company for bookings and maintenance of
strategic relationships, and to work on special projects within your area of
expertise, as requested by the Chief Executive Officer or his designee.

        2. INDEMNIFICATION. During the Transition Period, the Company will
continue to indemnify you for your actions within the course and scope of your
employment to the fullest extent permitted by law and as set forth in any
indemnification agreement previously executed between you and the Company.

<PAGE>

Mr. Dennis Riccio
February 28, 2002
Page 2

        3. ACCRUED SALARY AND PTO. You acknowledge that as of the Resignation
Date, the Company paid you all accrued salary earned through the Resignation
Date, subject to standard payroll deductions and withholdings. You will not
accrue Paid Time Off ("PTO") during the Transition Period and will be paid for
all accrued and unused PTO as of the Separation Date.

        4. HEALTH INSURANCE. To the extent provided by the federal COBRA law or,
if applicable, state insurance laws, and by the Company's current group health
insurance policies, you will be eligible to continue your group health insurance
benefits at your own expense. Later, you may be able to convert to an individual
policy through the provider of the Company's health insurance, if you wish.

        5. STOCK OPTIONS. You acknowledge and agree that all of your Company
stock options ("Options") will cease vesting as of May 31, 2002, and there shall
be no further vesting of your Options during the Transition Period,
notwithstanding your continuous service to Company during the Transition Period.
This will include vesting of the 4,500 option shares which vest on March 31,
2002. You further acknowledge and agree that your post-termination exercise
period for all vested Options shall commence as of the Separation Date and that
you will have until December 31, 2002 to exercise any vested Options. In
addition, you acknowledge and agree that you may be privy to important nonpublic
information during the Transition Period that may subject you to restrictions
regarding the trading of Company stock. All other terms, conditions, and
limitations applicable to your Options will remain in full force and effect
pursuant to the applicable stock option agreements and grant documents between
you and the Company and the applicable stock option plan documents. You are
advised by the Company to seek independent legal advice with respect to tax and
securities law issues regarding your Options and any sale of Company stock you
may make.

        6. EDCP AND LTIP. During the Transition Period, you will be eligible to
continue participation in the Company's Executive Deferred Compensation Program
("EDCP") and the Company's Long-Term Incentive Plan ("LTIP"). All other terms
and conditions of your participation in these programs will be as set forth in
the respective EDCP and LTIP Plan documents.

        7. LOAN REPAYMENT.

               a. FIRST LOAN. The Company provided you with a loan in November
1998 in the original principal amount of three hundred and fifty thousand
dollars ($350,000) plus interest (the "First Loan"), pursuant to which you
provided the Company with a Secured Promissory Note dated November 16, 1998,
which was later amended and restated pursuant to the Amended and Restated
Secured Promissory Note dated May 31, 2000 (the "First Note"), which First Note
is secured by a deed of trust on your home in Pleasanton, California (the "Deed
of Trust," together with the First Note, are collectively referred to as the
"Original First Loan Documents"). In connection with this Agreement, the Company
agrees to extend the maturity date of the First Loan to December 31, 2002, and
you agree to execute and deliver (and, to the extent necessary,

<PAGE>

Mr. Dennis Riccio
February 28, 2002
Page 3

cause your wife to execute and deliver) an Amended and Restated Secured
Promissory Note in the form set forth in Exhibit A attached hereto (the "Amended
and Restated First Note"). (The Amended and Restated First Note, and the Deed of
Trust, as each may be amended from time to time, are collectively referred to as
the "Amended First Loan Documents.")

The provisions set forth herein are not in any way a self-executing amendment of
any term or condition of the Original First Loan Documents, and you remain
unconditionally obligated to repay the First Loan on the terms set forth in the
Original First Loan Documents, until such time as the Amended and Restated First
Note is fully executed and delivered, and the provisions hereof shall not be
deemed to be a consent to any future amendment or waiver of any provisions of
the Original First Loan Documents or the Amended First Loan Documents.

                  b. SECOND LOAN. The Company provided you with a loan in
February 1999 in the original principal amount of four hundred and fifty
thousand dollars ($450,000) plus interest (the "Second Loan"), pursuant to which
you provided the Company with a Secured Promissory Note dated February 1, 1999
(the "Second Note"), which Second Note is secured by the Deed of Trust (the Deed
of Trust, together with the Second Note, are collectively referred to as the
"Original Second Loan Documents"). In connection with this Agreement, you agree
to amend the maturity date of the Second Loan to December 31, 2002, and you
agree to execute and deliver (and, to the extent necessary, cause your wife to
execute and deliver) (i) an Amended and Restated Secured Promissory Note, in the
form set forth in Exhibit B attached hereto (the "Amended and Restated Second
Note"). (The Amended and Restated Second Note, together with the Deed of Trust,
as each may be amended from time to time, are collectively referred to as the
"Amended Second Loan Documents.")

The provisions set forth herein are not in any way a self-executing amendment of
any term or condition of the Original Second Loan Documents, and you remain
unconditionally obligated to repay the Second Loan on the terms set forth in the
Original Second Loan Documents, until such time as the Amended and Restated
Second Note is fully executed and delivered, and the provisions hereof shall not
be deemed to be a consent to any future amendment or waiver of any provisions of
the Original Second Loan Documents or the Amended Second Loan Documents.

               c. LOAN INTEREST FORGIVENESS. Provided that you make payment of
the entire principal balance of the First Loan and Second Loan on or before
December 31, 2002, no interest shall be due and payable on either loan and any
such interest shall be forgiven.

        8. TAX CONSEQUENCES. You are advised by the Company to seek independent
legal advice with respect to tax and securities law issues regarding this
Agreement. The Company makes no representations or warranties regarding the tax
treatment that you will receive related to any consideration or transaction
contemplated by this Agreement.

        9. OTHER COMPENSATION OR BENEFITS. You acknowledge that, except as
expressly provided in this Agreement, you will not receive any additional
compensation, severance or benefits after the Resignation Date, except for any
benefit to which you have a vested interest pursuant to a Company benefit plan
document.

<PAGE>

Mr. Dennis Riccio
February 28, 2002
Page 4

        10. NONCOMPETE. Under this Agreement, and in addition to any obligations
under your Proprietary Information and Inventions Agreement, during the
Transition Period, you will not, directly or indirectly, whether as an officer,
director, stockholder, partner, proprietor, associate, representative,
consultant, or in any capacity whatsoever engage in, become financially
interested in, be employed by or have any business connection with any other
person, corporation, firm, partnership or other entity whatsoever which competes
with the Company, anywhere in the world; provided, however, you may own, as a
passive investor, securities of any competitor corporation, so long as your
direct holdings in any one such corporation shall not in the aggregate
constitute more than one percent (1%) of the voting stock of such corporation.
It is acknowledged that you are presently president of Metron Technology and
that such employment at Metron Technology (as it currently conducts business)
shall not be deemed competition in violation of this paragraph.

        11. CONSENT OF NEW EMPLOYER. You agree to fully disclose to your new
employer, and obtain the consent of your new employer for, your continuing
part-time employment relationship with the Company as provided in this
Agreement. You further agree to immediately notify the Company if your new
employer refuses to provide such consent or withdraws such consent at any time
during the Transition Period, which shall be considered a material breach of
this Agreement.

        12. EXPENSE REIMBURSEMENT. You agree that, within thirty (30) days of
the Separation Date, you will submit your final documented expense reimbursement
statement reflecting all business expenses you incurred through the Separation
Date, if any, for which you seek reimbursement. The Company will reimburse you
for these expenses pursuant to its regular business practice.

        13. RETURN OF COMPANY PROPERTY. You agree that by the Effective Date of
this Agreement (as defined herein), you will return to the Company all Company
documents (and all copies thereof) and other Company property in your possession
or control, including, but not limited to, Company files, correspondence,
memoranda, notes, notebooks, drawings, books and records, plans, forecasts,
reports, proposals, studies, agreements, financial information, personnel
information, sales and marketing information, research and development
information, systems information, specifications, computer-recorded information,
tangible property and equipment, credit cards, entry cards, identification
badges and keys; and any materials of any kind that contain or embody any
proprietary or confidential information of the Company (and all reproductions
thereof in whole or in part) ("Company Property"). You also represent that you
will perform a good faith search to ensure that you are no longer in possession
or control of any Company Property after the Effective Date.

        14. PROPRIETARY INFORMATION OBLIGATIONS. You acknowledge your continuing
obligation to comply with your Proprietary Information and Inventions Agreement,
a copy of which is attached hereto as Exhibit C.

<PAGE>

Mr. Dennis Riccio
February 28, 2002
Page 5

        15. CONFIDENTIALITY. The provisions of this Agreement will be held in
strictest confidence by you and the Company and will not be publicized or
disclosed in any manner whatsoever; provided, however, that: (a) you may
disclose this Agreement in confidence to your immediate family; (b) the parties
may disclose this Agreement in confidence to their respective attorneys,
accountants, auditors, tax preparers, and financial advisors; (c) the Company
may disclose this Agreement as necessary to fulfill standard or legally required
corporate reporting or disclosure requirements; and (d) the parties may disclose
this Agreement insofar as such disclosure may be necessary to enforce its terms
or as otherwise required by law. In particular, and without limitation, you may
not disclose the terms of this Agreement to any current or former Company
employee.

        16. NONDISPARAGEMENT. Both you and the Company (through its officers and
directors) agree not to disparage the other party, and the other party's
officers, directors, employees, shareholders and agents, in any manner likely to
be harmful to them or their business, business reputation or personal
reputation; provided that both you and the Company may respond accurately and
fully to any question, inquiry or request for information when required by legal
process.

        17. PRESS RELEASE. The Company previously issued a press release
announcing your departure from the Company. You acknowledge that the portion of
the press release relating to the circumstances of your departure was approved
by you prior to distribution.

        18. RELEASE BY YOU. In exchange for the consideration under this
Agreement to which you would not otherwise be entitled, and except for any
obligations undertaken in this Agreement, you hereby release, acquit and forever
discharge the Company, its officers, directors, agents, servants, employees,
attorneys, shareholders, predecessors, successors, assigns and affiliates, of
and from any and all claims, liabilities, causes of action, and obligations of
every kind and nature, in law, equity, or otherwise, known and unknown,
suspected and unsuspected, arising out of or in any way related to agreements,
events, acts or conduct at any time prior to and including the date you sign
this Agreement, including but not limited to: all such claims and demands
directly or indirectly arising out of or in any way connected with your
employment with the Company or the termination of that employment; claims or
demands related to salary, bonuses, commissions, stock, stock options, or any
other ownership or equity interest in the Company, vacation pay, fringe
benefits, expense reimbursements, severance pay, or any other form of
compensation; claims pursuant to any federal, state or local law, statute, or
cause of action including, but not limited to, the federal Civil Rights Act of
1964, as amended; the federal Americans with Disabilities Act of 1990; the
California Fair Employment and Housing Act as amended; the federal Age
Discrimination in Employment Act as amended ("ADEA"); tort law; contract law;
wrongful discharge; discrimination; harassment; retaliation; fraud; defamation;
emotional distress; and breach of the implied covenant of good faith and fair
dealing.

        19. ADEA WAIVER. You acknowledge that you are knowingly and voluntarily
waiving and releasing any rights you may have under ADEA, and that the
consideration given for the waiver and release in the preceding paragraph is in
addition to anything of value to which

<PAGE>

Mr. Dennis Riccio
February 28, 2002
Page 6

you were already entitled. You further acknowledge that you have been advised by
this writing that: (a) your waiver and release do not apply to any rights or
claims that may arise after the execution date of this Agreement; (b) you should
consult with an attorney prior to executing this Agreement; (c) you have
twenty-one (21) days to consider this Agreement (although you may choose to
voluntarily execute this Agreement earlier); (d) you have seven (7) days
following your execution of this Agreement to revoke your consent to the
Agreement by providing written notice to the Company's CEO; and (e) this
Agreement will not be effective until the date upon which the revocation period
has expired, which will be the eighth day after the date you execute this
Agreement (the "Effective Date").

        20. RELEASE BY THE COMPANY. Except for any obligations undertaken in
this Agreement, the Company hereby releases, acquits and forever discharges you
from any and all claims, liabilities, demands, causes of action, costs,
expenses, attorneys' fees, damages, indemnities, and obligations of every kind
and nature, in law, equity, or otherwise, known or unknown, suspected or
unsuspected, arising out of or connected with any act or omission by you within
the course and scope of your employment with the Company. The Company further
agrees that it will indemnify and hold you harmless from any and all acts or
omissions by you in the course and scope of your employment with the Company.

        21. SECTION 1542 WAIVER. In granting the releases herein, the parties
hereby acknowledge that they have read and understand Section 1542 of the
California Civil Code: "A GENERAL RELEASE DOES NOT EXTEND TO CLAIMS WHICH THE
CREDITOR DOES NOT KNOW OR SUSPECT TO EXIST IN HIS FAVOR AT THE TIME OF EXECUTING
THE RELEASE, WHICH IF KNOWN BY HIM MUST HAVE MATERIALLY AFFECTED HIS SETTLEMENT
WITH THE DEBTOR." The parties hereby expressly waive and relinquish all rights
and benefits under that section and any law of any jurisdiction of similar
effect with respect to their release of claims hereby.

        22. COOPERATION. The parties will cooperate in the execution of any
documents or respond to any inquiries necessary to implement the Agreement.

        23. ARBITRATION. To ensure rapid and economical resolution of any
disputes which may arise under this Agreement, you and the Company agree that
any and all disputes or controversies of any nature whatsoever (with the sole
exception of disputes involving enforcement of the Proprietary Information And
Inventions Agreement), arising from or regarding the interpretation,
performance, enforcement or breach of this Agreement shall be resolved by
confidential, final and binding arbitration (rather than trial by jury or court
or resolution in some other forum) conducted by Judicial Arbitration and
Mediation Services, Inc. ("JAMS") in San Francisco, California, under the
then-existing JAMS rules. The prevailing party in such arbitration proceedings
shall be entitled to recover from the other party reasonable attorneys' fees and
other recoverable costs incurred in connection with such arbitration proceeding.
Nothing in this Agreement shall prevent either party from seeking to obtain
injunctive relief in court to preserve the status quo or prevent irreparable
harm pending the conclusion of any such arbitration.

<PAGE>

Mr. Dennis Riccio
February 28, 2002
Page 7

        24. MISCELLANEOUS. This Agreement, including the exhibit, constitutes
the complete, final and exclusive embodiment of the entire agreement between you
and the Company with regard to this subject matter. It is entered into without
reliance on any promise or representation, written or oral, other than those
expressly contained herein, and it supersedes any other such promises,
warranties or representations. This Agreement may not be modified or amended
except in a writing signed by both you and a duly authorized officer of the
Company. This Agreement will bind the heirs, personal representatives,
successors and assigns of both you and the Company, and inure to the benefit of
both you and the Company, their heirs, successors and assigns. The failure to
enforce any breach of this Agreement shall not be deemed to be a waiver of any
other or subsequent breach. For purposes of construing this Agreement, any
ambiguities shall not be construed against either party as the drafter. If any
provision of this Agreement is determined to be invalid or unenforceable, in
whole or in part, this determination will not affect any other provision of this
Agreement and the provision in question will be modified so as to be rendered
enforceable in a manner consistent with the intent of the parties insofar as
possible. This Agreement will be deemed to have been entered into and will be
construed and enforced in accordance with the laws of the State of California as
applied to contracts made and to be performed entirely within California. This
Agreement may be executed in counterparts or with facsimile signatures, which
shall be deemed equivalent to originals.

If this Agreement is acceptable to you, please sign below and return one
original to me. I wish you all the best in your future endeavors.

Sincerely,

Asyst Technologies, Inc.

By: /s/ MIHIR PARIKH
   ------------------------------
Mihir Parikh, Ph.D., Chairman and
Chief Executive Officer

Exhibit A -- Amended and Restated Secured Promissory Note -- First Loan
Exhibit B -- Amended and Restated Secured Promissory Note -- Second Loan
Exhibit C -- Proprietary Information and Inventions Agreement

UNDERSTOOD AND AGREED:

/s/ DENNIS R. RICCIO
------------------------------
Dennis R. Riccio

4/12/02
------------------
Date

<PAGE>

Mr. Dennis Riccio
February 28, 2002
Page 8

APPROVED AS TO FORM:

By: /s/ [Signature Illegible]
   --------------------------------------------
        Law Offices of Lucius A. Cooper
        Attorneys for Dennis Riccio

By: /s/ [Signature Illegible]
   --------------------------------------------
        Cooley Godward LLP
        Attorneys for Asyst Technologies, Inc.

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