- --------------------------------------------------------------------------------


                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549



                                    FORM 8-K


                Current Report Pursuant to Section 13 or 15(d) of
                       the Securities Exchange Act of 1934


                Date of Report (Date of earliest event reported):
                               September 24, 2002

                             KLA-TENCOR CORPORATION
                                 --------------
             (Exact name of registrant as specified in its charter)



          Delaware                       000-09992               04-2564110
          --------                       ---------               ----------
(State or other jurisdiction            (Commission            (IRS Employer
     of incorporation)                  File Number)         Identification No.)

                                 160 RIO ROBLES
                           SAN JOSE, CALIFORNIA 95134

                    (Address of Principal Executive Offices)
                                   (Zip Code)

       Registrant's telephone number, including area code: (408) 468-4200


          (Former name or former address, if changed since last report)


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Item 5.  Other Events and Regulation FD Disclosure

         On September 24, 2002, KLA-Tencor Corporation submitted to the
Securities and Exchange Commission the Statements under Oath of Principal
Executive Officer and Principal Financial Officer in accordance with the
Security and Exchange Commission's June 27, 2002 Order requiring the filing of
sworn statements pursuant to Section 21(a)(1) of the Securities Exchange Act of
1934.



Item 7.           Financial Statements and Exhibits
(c)      Exhibits

                   The following exhibits are filed herewith:


Exhibit
Number          Description

99.1     Statement  Under  Oath of  Kenneth L.  Schroeder,  Principal  Executive
         Officer of KLA-Tencor  Corporation,  Regarding Facts and  Circumstances
         Relating to Exchange Act Filings

99.2     Statement Under Oath of John H. Kispert, Principal Financial Officer of
         KLA-Tencor  Corporation,  Regarding Facts and Circumstances Relating to
         Exchange Act Filings



                                    SIGNATURE

         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 hereunto duly authorized.

                                             KLA-TENCOR CORPORATION


Date:  September 25, 2002                    By:  /s/ John H. Kispert
                                             -----------------------------------
                                                  John H. Kispert
                                                  Chief Financial Officer










                                  Exhibit Index


Exhibit
Number          Description

99.1     Statement  Under  Oath of  Kenneth L.  Schroeder,  Principal  Executive
         Officer of KLA-Tencor  Corporation,  Regarding Facts and  Circumstances
         Relating to Exchange Act Filings

99.2     Statement Under Oath of John H. Kispert, Principal Financial Officer of
         KLA-Tencor  Corporation,  Regarding Facts and Circumstances Relating to
         Exchange Act Filings







                                                                    Exhibit 99.1


               Statement Under Oath of Principal Executive Officer
       Regarding Facts and Circumstances Relating to Exchange Act Filings



I, Kenneth L. Schroeder, state and attest that:

         (1) To the best of my  knowledge,  based  upon a review of the  covered
reports of KLA-Tencor Corporation, and, except as corrected or supplemented in a
subsequent covered report:

         o        no covered report  contained an untrue statement of a material
                  fact as of the end of the period covered by such report (or in
                  the  case  of  a  report  on  Form  8-K  or  definitive  proxy
                  materials, as of the date on which it was filed); and

         o        no covered  report  omitted to state a material fact necessary
                  to make the statements in the covered report,  in light of the
                  circumstances under which they were made, not misleading as of
                  the end of the period  covered by such  report (or in the case
                  of a report on Form 8-K or definitive proxy  materials,  as of
                  the date on which it was filed).

         (2) I have reviewed the contents of this statement with the Company's
audit committee.

         (3) In this statement under oath, the following,  if filed on or before
the date of this statement, is a "covered report":

         o        Annual Report of KLA-Tencor  Corporation  on Form 10-K for the
                  year  ended  June  30,  2002  filed  with  the  Commission  on
                  September 20, 2002;

         o        all  reports  on Form  10-Q,  all  reports on Form 8-K and all
                  definitive  proxy  materials of KLA-Tencor  Corporation  filed
                  with the Commission  subsequent to the filing of the Form 10-K
                  identified above; and

         o        any amendments to the foregoing.


/s/ Kenneth L. Schroeder
- --------------------------------------------
Kenneth L. Schroeder, Chief Executive Officer
September 23, 2002


                                                  Subscribed and sworn to
                                                  before me this 23rd day of
                                                  September 2002.

                                                  /s/ Kerry Robison
                                                  ------------------------------
                                                  Notary Public
                                                  My Commission Expires: 9/3/04








                                                                    Exhibit 99.2


               Statement Under Oath of Principal Financial Officer
       Regarding Facts and Circumstances Relating to Exchange Act Filings



I, John H. Kispert, state and attest that:

         (1) To the best of my knowledge, based upon a review of the covered
reports of KLA-Tencor Corporation, and, except as corrected or supplemented in a
subsequent covered report:

         o        no covered report  contained an untrue statement of a material
                  fact as of the end of the period covered by such report (or in
                  the  case  of  a  report  on  Form  8-K  or  definitive  proxy
                  materials, as of the date on which it was filed); and

         o        no covered  report  omitted to state a material fact necessary
                  to make the statements in the covered report,  in light of the
                  circumstances under which they were made, not misleading as of
                  the end of the period  covered by such  report (or in the case
                  of a report on Form 8-K or definitive proxy  materials,  as of
                  the date on which it was filed).

         (2) I have reviewed the contents of this statement with the Company's
audit committee.

         (3) In this statement under oath, the following,  if filed on or before
the date of this statement, is a "covered report":

         o        Annual Report of KLA-Tencor  Corporation  on Form 10-K for the
                  year  ended  June  30,  2002  filed  with  the  Commission  on
                  September 20, 2002;

         o        all  reports  on Form  10-Q,  all  reports on Form 8-K and all
                  definitive  proxy  materials of KLA-Tencor  Corporation  filed
                  with the Commission  subsequent to the filing of the Form 10-K
                  identified above; and

         o        any amendments to the foregoing.

/s/ John H. Kispert
- --------------------------------------------
John H. Kispert, Chief Financial Officer
September 23, 2002


                                                 Subscribed and sworn to
                                                 before me this 23rd day of
                                                 September 2002.

                                                  /s/ Kerry Robison
                                                  ------------------------------
                                                  Notary Public
                                                  My Commission Expires: 9/3/04