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证券文件编号
000-09992
CUSIP NUMBER
482480100.
美国
证券交易委员会
Washington, D.C. 20549
FORM 12b-25
延迟申请通知
(Check one): O.形式10-kO.Form 20-FO.Form 11-Kþ表格10-QO.形式10-DO.Form N-SARO.Form N-CSR
期限结束: September 30, 2006
O.转型报告表格10-k
O.转换报告表格20-F.
O.Transition Report on Form 11-K
O.表格10-Q的过渡报告
O.Transition Report on Form N-SAR
For the Transition Period Ended:

在准备表单之前阅读指令(在后页面)。请打印或键入。
此表格中的任何内容都不会被解释为暗示委员会已验证了此处包含的任何信息。
If the notification relates to a portion of the filing checked above, identify the Item(s) to which the notification relates:
第一部分 - 注册人信息
KLA-TENCOR CORPORATION
Full Name of Registrant
Former Name if Applicable
160 Rio Robles
首席执行官办公室的地址(街道和门牌号)
San Jose, California 95134
城市,州和邮政编码
PART II — RULES 12b-25(b) AND (c)
如果无法提交主题报告,如果没有不合理的努力或费用,并且注册人根据第12B-25(b)条,请致力于救济,应完成以下内容。(如果适当复选框)
O.
(a) The reason described in reasonable detail in Part III of this form could not be eliminated without unreasonable effort or expense
(b) 主题年度报告,半年度报告,表格10-k的转型报告,形式20-F,表格11-k,形式N-SAR或形式的N-CSR,或其部分将在第十五或之前提交在规定的截止日期后日历日;或者关于表格10-D形式的季度报告或转型报告,或者在第10-D或其部分的情况下,将在规定的截止日期之后或之前提交第五个日历日或之前的第五个日历日;和
(C) The accountant’s statement or other exhibit required by Rule 12b-25(c) has been attached if applicable.
PART III — NARRATIVE
下面以合理的详细说明为什么形成10-k,20-f,11-k,10-q,10-d,n-sar,n-csr或其转换报告或其部分,不能在规定内提交时间段。
As previously announced, a Special Committee of independent directors, appointed by the Board of Directors of KLA-Tencor Corporation (the “Company”), is conducting an internal investigation relating to stock options granted to the employees of the Company, the timing of such grants and their related accounting and tax treatment.
On September 27, 2006, the Board of Directors concluded that financial statements and all earnings and press releases and similar communications issued by the Company relating to periods beginning on or after July 1, 1997, should no longer be relied upon, including the Company’s financial statements for fiscal years 1998 through 2005, the interim periods contained therein, and the fiscal quarters ended September 30, 2005, December 31, 2005 and March 31, 2006.
2006年10月16日,本公司宣布本公司董事会特别beplay官网ued委员会大幅填写了对公司历史股票期权实践的调查。该公司现beplay官网ued在预期,股票赔偿费用的额外额外非现金费用将不超过4亿美元。
As a result of the ongoing work by the Company to complete its financial statements and the audit or review of the results thereof by PricewaterhouseCoopers LLP, the Company’s independent registered public accounting firm, the Company was unable to file its quarterly report on Form 10-Q for the three months ended September 30, 2006 by the required filing date of November 14, 2006, without unreasonable effort or expense. The Company does not anticipate that it will be able to file its Form 10-Q on or before the fifth calendar day following the prescribed due date, in accordance with Rule 12b-25.
该公司的beplay官网ued管理层和特别委员会讨论了普华永道的这些事项。该公司专beplay官网ued注于尽快解决这些问题,并计划在完成调查后尽快提交其形式10-K和10-Q以及任何必要的重述财务报表。
SEC 1344 (03-05) Persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.


(如果需要,请附上额外的纸张)
第四部分 - 其他信息
(1) 在此通知方面联系的人的姓名和电话号码
Richard P. Wallace (408) 875-3000
(Name)
(区号) (电话Number)
(2) Have all other periodic reports required under Section 13 or 15(d) of the Securities Exchange Act of 1934 or Section 30 of the Investment Company Act of 1940 during the preceding 12 months or for such shorter period that the registrant was required to file such report(s) been filed? If answer is no, identify report(s).
是的O.þ
截至2006年6月30日止年度的表格10-K
(3) 它预计会有来自上一财会年度的相应期间的行动结果的任何重大变化将由收入报表反映在主题报告或其部分中?
是的þO.
如果是,请附上对预期的变化的解释,叙述性和定量地,并且如果合适的话,陈述无法进行合理估计结果的原因。
The Company expects to record additional stock-based compensation expenses and related non-cash charges which will have an impact on its financial statements not to exceed $400 million.
All statements included in this Form 12b-25, Notification of Late Filing, other than statements or characterizations of historical fact, are forward-looking statements. These forward-looking statements are based on the company’s current expectations, estimates and projections about the company’s industry and business, management’s beliefs, and certain assumptions made by the company, all of which are subject to change. Forward-looking statements can often be identified by words such as “anticipates,” “expects,” “intends,” “plans,” “predicts,” “believes,” “seeks,” “estimates,” “may,” “will,” “should,” “would,” “could,” “potential,” “continue,” “ongoing,” similar expressions, and variations or negatives of these words. These statements are not guarantees of future performance and are subject to risks, uncertainties and assumptions that are difficult to predict. Therefore, the company’s actual results could differ materially and adversely from those expressed in any forward-looking statements as a result of various factors. Our Annual Report on Form 10-K, subsequent Quarterly Reports on Form 10-Q, recent Current Reports on Form 8-K, and other SEC filings discusses important risk factors that could contribute to such differences or otherwise affect our business, results of operations and financial condition. We undertake no obligation to revise or update publicly any forward-looking statement for any reason, except as otherwise required by law.
KLA-TENCOR CORPORATION
(Name of Registrant as Specified in Charter)
已代表其签名的Hereunto正式授权代表其代表其代表签署这一通知。
日期
2006年11月15日 经过 / s /杰夫大厅
Jeff Hall
Chief Financial Officer
说明书:表格可以由注册人的执行董事或任何其他适当授权代表签署。签署表格的人的名称和标题应在签名下键入或打印。如果声明由授权代表(执行官除外)代表注册人签署,则代表代表代表代表代表签署注册人的证据应由表格提交。
ATTENTION
故意错误或遗漏的事实构成了联邦刑事违规行为(见18 U.S.C.1001)。

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