Exhibit 99.2


                    CERTIFICATION OF CHIEF FINANCIAL OFFICER
                                   PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


I, John H. Kispert,  pursuant to 18 U.S.C.  Section 1350, as adopted pursuant to
Section 906 of the  Sarbanes-Oxley Act of 2002,  that the  Quarterly  Report of
KLA-Tencor  Corporation  on Form 10-Q for the fiscal quarter ended September 30,
2002 fully complies with the  requirements  of Section 13(a) or 15(d) of the
Securities  Exchange Act of 1934 and that information  contained  in such
Quarterly  Report on Form 10-Q fairly  presents in all  material respects the
financial condition and results of operations of KLA-Tencor Corporation.


                                                By:   /s/ John H. Kispert
                                                ------------------------------
                                                Name: John H. Kispert
                                                Title:   Chief Financial Officer