根据2002年萨班斯-奥克斯利法案第302节，John H. Kispert证明:我已经审阅了这份KLA-Tencor公司的10-Q表格季度报告;2.根据我所知,这份报告不包含任何不真实的材料声明的事实或省略状态必要材料事实陈述,根据在何种情况下这样的声明,而不是误导对报告所述期间;3.据我所知，本报告中的财务报表和其他财务信息，在所有重要方面都公允地反映了登记人截至本报告所述期间的财务状况、经营结果和现金流量;4.注册人的其他认证官员和我负责为注册人建立和维护披露控制和程序(如交易法规则13a-15(e)和15d-15(e)所定义)，并具有:a)设计该等披露控制和程序，或在我方监督下设计该等披露控制和程序，以确保与注册人(包括其合并子公司)有关的重要信息由该等实体内的其他人向我方披露，特别是在本报告编写期间; b) Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and c) Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over the financial reporting; and 5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions): a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting. November 7, 2003 /s/ JOHN H. KISPERT - ---------------------- ------------------------ (Date) John H. Kispert Executive Vice President and Chief Financial Officer (Principal Accounting Officer)