content: <PAGE>
  
                                   UNITED STATES
                         SECURITIES AND EXCHANGE COMMISSION
  
                              WASHINGTON, D.C.  20549
  
  
  
                                      FORM 8-K
  
                                   CURRENT REPORT
                 PURSUANT TO SECTION 12 OR 15(D) OF THE SECURITIES
                                EXCHANGE ACT OF 1934
  
  
           Date of Report (Date of earliest event reported): June 1, 2001
  
  
  
                        INTEGRATED MEASUREMENT SYSTEMS, INC.
               (Exact name of registrant as specified in its charter)
  
  
          OREGON                          0-26274                  93-0840631
  (State or other jurisdiction     (Commission File Number)     (I.R.S. Employer
      of incorporation)                                        Identification No.)
  
  
  
                              9525 S.W. Gemini Drive
                             Beaverton, Oregon  97008
                                  (503) 626-7117
           (Address, including zip code, and telephone number, including
              area code, of registrant's principal executive offices)
  
                                         1
  <PAGE>
  
  Item 5.  OTHER EVENTS
  
         On May 16, 2001, Integrated Measurement Systems, Inc., an Oregon
         corporation (the "Company"), Credence Systems Corporation, a Delaware
         corporation ("Credence") and Iguana Acquisition Corporation, an Oregon
         corporation and a wholly-owned subsidiary of Credence entered into an
         Agreement and Plan of Merger and Reorganization (the "Merger Agreement").
         In connection with the Merger Agreement, Credence and Merger Sub entered
         into a Shareholder Agreement with Cadence Design Systems, Inc., dated as
         of May 16, 2001 (the "Shareholder Agreement").  On June 4, 2001 the
         parties to the Shareholder Agreement entered into an Amended and Restated
         Shareholder Agreement.  On June 1, 2001, the parties to the Merger
         Agreement entered into Amendment No. 1 to the Merger Agreement.
  
  Item 7.  FINANCIAL STATEMENTS AND EXHIBITS
  
         (c)  Exhibits
  
         2.1  Agreement and Plan of Merger and Reorganization dated May 16, 2001
              by and among Credence Systems Corporation, Iguana Acquisition
              Corporation and Integrated Measurement Systems, Inc. (incorporated
              by reference to the Company's Current Report on Form 8-K filed with
              the Commission on May 18, 2001)
  
         2.2  Amendment No. 1 to the Agreement and Plan of Merger and
              Reorganization dated June 1, 2001 by and among Credence Systems
              Corporation, Iguana Acquisition Corporation and Integrated
              Measurement Systems, Inc.
  
         99.1 Amended and Restated Shareholder Agreement effective as of May 16,
              2001 and dated June 4, 2001 by and among Credence Systems
              Corporation, Iguana Acquisition Corporation and Cadence Design
              Systems, Inc.
  
  
  
                                     SIGNATURES
  
       Pursuant to the requirements of the Securities Exchange Act of 1934, the
  Registrant has duly caused this report to be signed on its behalf by the
  undersigned thereunto duly authorized on June 4, 2001.
  
                                INTEGRATED MEASUREMENT SYSTEMS, INC.
  
                                         2
  <PAGE>
  
                                (Registrant)
  
  
                                /s/ Fred Hall
                                --------------------------------
                                Fred Hall
                                Chief Financial Officer
  
                                         3
  <PAGE>
  
                                 INDEX TO EXHIBITS
  
  
         Exhibit No.
         -----------
  
         2.1          Agreement and Plan of Merger and Reorganization dated May
                      16, 2001 by and among Credence Systems Corporation, Iguana
                      Acquisition Corporation and Integrated Measurement Systems,
                      Inc. (incorporated by reference to the Company's Current
                      Report on Form 8-K filed with the Commission on May 18,
                      2001)
  
         2.2          Amendment No. 1 to the Agreement and Plan of Merger and
                      Reorganization dated June 1, 2001 by and among Credence
                      Systems Corporation, Iguana Acquisition Corporation and
                      Integrated Measurement Systems, Inc.
  
         99.1         Amended and Restated Shareholder Agreement effective as of
                      May 16, 2001 and dated June 4, 2001 by and among Credence
                      Systems Corporation, Iguana Acquisition Corporation and
                      Cadence Design Systems, Inc.
  
  
                                         4
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metadata_filer: {"company-data": {"conformed-name": "INTEGRATED MEASUREMENT SYSTEMS INC /OR/", "cik": "0000945441", "assigned-sic": "3825", "irs-number": "930840631", "state-of-incorporation": "OR", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "000-26274", "film-number": "1653980"}, "business-address": {"street1": "9525 SW GEMINI DR", "city": "BEAVERTON", "state": "OR", "zip": "97008", "phone": "5036267117"}, "mail-address": {"street1": "9525 SW GEMINI DR", "city": "BEAVERTON", "state": "OR", "zip": "97008"}}
text: UNITED STATES
                         SECURITIES AND EXCHANGE COMMISSION
  
                              WASHINGTON, D.C.  20549
  
                                      FORM 8-K
  
                                   CURRENT REPORT
                 PURSUANT TO SECTION 12 OR 15(D) OF THE SECURITIES
                                EXCHANGE ACT OF 1934
  
           Date of Report (Date of earliest event reported): June 1, 2001
  
                        INTEGRATED MEASUREMENT SYSTEMS, INC.
               (Exact name of registrant as specified in its charter)
  
          OREGON                          0-26274                  93-0840631
  (State or other jurisdiction     (Commission File Number)     (I.R.S. Employer
      of incorporation)                                        Identification No.)
  
                              9525 S.W. Gemini Drive
                             Beaverton, Oregon  97008
                                  (503) 626-7117
           (Address, including zip code, and telephone number, including
              area code, of registrant's principal executive offices)
  
                                         1
  Item 5.  OTHER EVENTS
  
         On May 16, 2001, Integrated Measurement Systems, Inc., an Oregon
         corporation (the "Company"), Credence Systems Corporation, a Delaware
         corporation ("Credence") and Iguana Acquisition Corporation, an Oregon
         corporation and a wholly-owned subsidiary of Credence entered into an
         Agreement and Plan of Merger and Reorganization (the "Merger Agreement").
         In connection with the Merger Agreement, Credence and Merger Sub entered
         into a Shareholder Agreement with Cadence Design Systems, Inc., dated as
         of May 16, 2001 (the "Shareholder Agreement").  On June 4, 2001 the
         parties to the Shareholder Agreement entered into an Amended and Restated
         Shareholder Agreement.  On June 1, 2001, the parties to the Merger
         Agreement entered into Amendment No. 1 to the Merger Agreement.
  
  Item 7.  FINANCIAL STATEMENTS AND EXHIBITS
  
         (c)  Exhibits
  
         2.1  Agreement and Plan of Merger and Reorganization dated May 16, 2001
              by and among Credence Systems Corporation, Iguana Acquisition
              Corporation and Integrated Measurement Systems, Inc. (incorporated
              by reference to the Company's Current Report on Form 8-K filed with
              the Commission on May 18, 2001)
  
         2.2  Amendment No. 1 to the Agreement and Plan of Merger and
              Reorganization dated June 1, 2001 by and among Credence Systems
              Corporation, Iguana Acquisition Corporation and Integrated
              Measurement Systems, Inc.
  
         99.1 Amended and Restated Shareholder Agreement effective as of May 16,
              2001 and dated June 4, 2001 by and among Credence Systems
              Corporation, Iguana Acquisition Corporation and Cadence Design
              Systems, Inc.
  
                                     SIGNATURES
  
       Pursuant to the requirements of the Securities Exchange Act of 1934, the
  Registrant has duly caused this report to be signed on its behalf by the
  undersigned thereunto duly authorized on June 4, 2001.
  
                                INTEGRATED MEASUREMENT SYSTEMS, INC.
  
                                         2
  (Registrant)
  
                                /s/ Fred Hall
                                --------------------------------
                                Fred Hall
                                Chief Financial Officer
  
                                         3
  INDEX TO EXHIBITS
  
         Exhibit No.
         -----------
  
         2.1          Agreement and Plan of Merger and Reorganization dated May
                      16, 2001 by and among Credence Systems Corporation, Iguana
                      Acquisition Corporation and Integrated Measurement Systems,
                      Inc. (incorporated by reference to the Company's Current
                      Report on Form 8-K filed with the Commission on May 18,
                      2001)
  
         2.2          Amendment No. 1 to the Agreement and Plan of Merger and
                      Reorganization dated June 1, 2001 by and among Credence
                      Systems Corporation, Iguana Acquisition Corporation and
                      Integrated Measurement Systems, Inc.
  
         99.1         Amended and Restated Shareholder Agreement effective as of
                      May 16, 2001 and dated June 4, 2001 by and among Credence
                      Systems Corporation, Iguana Acquisition Corporation and
                      Cadence Design Systems, Inc.
  
                                         4