Document:

EXHIBIT 10.32

                               AMENDMENT NO. 1 TO
                                RIGHTS AGREEMENT

     Amendment No. 1, dated as of June 26, 2000 to the Rights Agreement, dated
as of April 24, 1997 ("Agreement"), between CFM Technologies, Inc., a
Pennsylvania corporation (the "Company"), and American Stock Transfer & Trust
Co., as Rights Agent (the "Rights Agent").

                              BACKGROUND STATEMENT

     The Board of Directors of the Company, on April 18, 2000, authorized that
the Agreement be amended, in accordance with Section 27 thereof, to (i) render
the Agreement inapplicable to any business combination transaction contemplated
between CFM and Mattson Technology, Inc. ("Mattson"), including any part thereof
contemplated by a merger agreement or other documents forming part of the
transaction (a "Mattson transaction"), (ii) ensure that (x) none of Mattson or
its subsidiaries is an Acquiring Person (as defined in the Agreement) pursuant
to the Agreement by virtue of the execution of a merger agreement, the
consummation of a Mattson transaction or the other transactions contemplated in
a merger agreement or other documents forming part of a Mattson transaction, and
(y) a Distribution Date, Flip-in Event, or Flip-Over Event (as such terms are
defined in the Rights Agreement) does not occur by reason of the execution of a
merger agreement or other document forming part of a Mattson transaction, the
consummation of a Mattson transaction or the consummation of the transactions
contemplated in a merger agreement or other documents forming part of a Mattson
transaction, and that such provisions in the Agreement may not be further
amended by the Company without the prior consent of Mattson, in its sole
discretion, until any merger agreement or similar document evidencing a Mattson
transaction has been terminated.

                             STATEMENT OF AGREEMENT

     Accordingly, in consideration of the premises and the mutual agreements
herein set forth, in accordance with Section 27 the Agreement, the Agreement is
hereby amended as follows:

     SECTION 1. CERTAIN DEFINITIONS.

     (a) The definition of "Acquiring Person" is amended to add the following
sentence to the end of Section 1(a): Notwithstanding the foregoing or anything
in this Agreement to the contrary, neither Mattson nor any of its subsidiaries
shall be considered or deemed to be an "Acquiring Person" under this Agreement.

<PAGE>

     (b) The definition of "Distribution Date" is hereby amended to add the
following sentence to the end of Section 1(i): Notwithstanding the foregoing or
anything herein to the contrary, the definition of "Distribution Date" shall not
include any day or date that would otherwise be included to the extent such day
or date is related to a Mattson transaction, including the consummation of such
a transaction or the execution of any merger agreement or any other document
forming part of such a transaction.

     (c) The definition of "Flip-in Event" is hereby amended to add the
following sentence to the end of Section 1(n): Notwithstanding the foregoing or
anything in this Agreement to the contrary, the definition of Flip-in Event
shall not include a Mattson transaction, including the consummation of such a
transaction, or the execution of any merger agreement or any other document
forming part of such a transaction.

     SECTION 2. MISCELLANEOUS.

     (a) The Agreement is hereby further amended in whatever way necessary to
render it, and any rights contemplated under it, inapplicable to and unaffected
by, any transaction between the Company and Mattson, including the consummation
of such a transaction or the execution of any merger agreement or other document
forming part of such transaction.

     (b) No provision set forth in this Amendment No. 1 shall be amended or
modified without the consent of Mattson until such time as any Mattson
transaction has been consummated or terminated.

                                       CFM TECHNOLOGIES, INC.

                                        By: /s/ LORIN J. RANDALL
                                            -----------------------------
                                                Lorin J. Randall
                                                Chief Financial Officer

                                       2EXHIBIT 10.33

                     AGREEMENT FOR TERMINATION OF LITIGATION
                             AND NULLITY PROCEEDINGS

        THIS AGREEMENT is entered into this 27TH day of June, 2000 (the
"Effective Date") by and between CFM Technologies, Inc., having a place of
business at 150 Oaklands Blvd., Exton, PA 19341 ("CFM"), CFMT, Inc., having a
place of business at 1403 Foulk Road, P.O. Box 8985, Wilmington, DE 19803,
hereinafter collectively referred to as "CFM," and STEAG Electronic Systems AG,
a German company having a place of business at Ruettenscheider Strasse 1-3,
45128 Essen, Germany, and STEAG Electronic Systems, Inc. (formerly known as
STEAG Microtech, Inc.), a Delaware corporation having a place of business at
8305 Cross Park Drive, Austin, Texas, 78754, hereinafter collectively referred
to as "STEAG."

                                   WITNESSETH

     WHEREAS, CFM and STEAG are the parties in litigation pending on a second
appeal, which has been briefed but not orally argued, in the U.S. Court of
Appeals for the Federal Circuit captioned CFMT, INC. and CFM TECHNOLOGIES, INC.,
Plaintiffs-Appellees v. STEAG MICROTECH, INC., Defendant-Appellant, Appeal No.
00-1086;

     WHEREAS, the pending appeal and an earlier appeal were from Judgments of
the U.S. District Court for the District of Delaware in an action captioned
CFMT, INC. and CFM TECHNOLOGIES, INC., Plaintiffs v. STEAG MICROTECH, INC.,
Defendant, C.A. No. 95-442 (RRM);

     WHEREAS, STEAG and/or its affiliates have filed nullity actions against CFM
Patents in Germany, France, Ireland, Holland, and Japan;

<PAGE>

     WHEREAS, CFM and STEAG are parties to an Interim Patent License Agreement
dated June 27, 2000, in which CFM granted certain rights under CFM patents to
STEAG;

     WHEREAS, STEAG and Mattson Technology Inc., having a place of business at
3550 West Warren Avenue, Fremont, CA 94538, hereinafter referred to as
"Mattson," are entering into a Strategic Business Combination Agreement,
pursuant to which, among other things, Mattson will acquire certain subsidiaries
of STEAG, including subsidiaries engaged in the semiconductor wet processing
business (the "Combination Agreement");

     WHEREAS, CFM and Mattson are entering into an Agreement and Plan of Merger,
intending to result in CFM becoming a wholly-owned subsidiary of Mattson (the
"Merger Agreement" and, together with the Combination Agreement, the
"Transaction Agreements"); and

     WHEREAS, the parties desire to terminate the above identified Federal
litigation and nullity actions on the following terms:

     NOW, THEREFORE, CFM and STEAG agree as follows:

               1. CFM and STEAG shall within three (3) days of the execution of
          this Agreement cause the above entitled pending second appeal to be
          dismissed by directing their counsel of record to execute and file a
          joint motion for dismissal in the form attached as Exhibit A hereto.
          CFM and STEAG shall cooperate as necessary under the Rules of the U.S.
          Court of Appeals for the Federal Circuit to achieve this dismissal.

               2. STEAG consents to entry of final judgment of the District
          Court that CFM's United States Patent 4,911,761 is valid, enforceable,
          and infringed by STEAG.

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<PAGE>

               3. In consideration of the mutual promises, representations and
          warranties contained in the Interim Patent License Agreement and the
          Transaction Agreements, CFM waives and releases STEAG from all damages
          awarded in the United States District Court for the District of
          Delaware, including all rights to an accounting or award of damages
          for infringing sales after September 30, 1997, pre-judgment and
          post-judgment interest, attorneys' fees, costs and enhanced damages.

               4. Each party is responsible for its own attorneys' fees and
          costs in the District Court and in the U.S. Court of Appeals for the
          Federal Circuit.

               5. The injunction entered against STEAG on June 18, 1998 shall
          remain in force, subject to license rights or ownership rights
          conferred by the Interim Patent License Agreement and the Transaction
          Agreements.

               6. When the said pending second appeal has been dismissed,
          remanded by the U.S. Court of Appeals for the Federal Circuit and
          received by the U.S. District Court for the District of Delaware, the
          parties shall within three (3) days from the date of notice that the
          case has been returned to the District Court submit a proposed Consent
          Judgment to the District Court, in the form attached as Exhibit B
          hereto.

               7. STEAG shall submit within thirty (30) days of the execution of
          this Agreement documents sufficient to cause all nullity actions filed
          by STEAG and/or its affiliates against CFM Patents, including those in
          Germany, France, Ireland, Holland, and Japan, to be dismissed or
          withdrawn so as to maintain the CFM patents in force in each country,
          provided, that, in any country where STEAG would not have the legal
          right to cause the dismissal or withdrawal of any such nullity action,
          STEAG shall only be required to use its best efforts to cause such
          nullity action to be dismissed or withdrawn.

                                       3
<PAGE>

     IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed as of the day and year above first written.

CFM TECHNOLOGIES, INC.                           STEAG ELECTRONIC SYSTEMS AG

/s/ Roger A. Carolin                             /s/ Dr. Rolf Thaler
-----------------------                          ----------------------
    President & CEO                                  CFO

CFMT, INC.

/s/ Lorin J. Randall                             /s/ Dr. Peter Lockowandt
-----------------------                          ------------------------
    Secretary                                        General Counsel

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