KLA-Tencor/ADE Aquisition Delayed Pending German Antitrust Clearance
SAN Jose, CA and Westwood, MA, July 11, 2006 -- KLA-Tencor Corporation (NasdaqGS: KLAC) and ADE Corporation (NasdaqGM: ADEX) announced that the acquisition of ADE will be delayed pending approval from German antitrust authorities.  The acquisition has already been cleared by the antitrust authorities in the United States and in all other applicable jurisdictions. 

German authorities have notified KLA-Tencor that a Phase II investigation of the proposed acquisition of ADE by KLA-Tencor has begun.  KLA-Tencor and ADE stated that they will continue to cooperate with the German authorities to facilitate a timely review.  Both firms are confident that the acquisition will ultimately receive clearance. 

The special meeting of ADE stockholders to consider the acquisition will be held as scheduled on July 13, 2006.  Assuming that the acquisition receives stockholder approval, the parties anticipate that the acquisition will be completed once German antitrust clearance is obtained.

About ADE Corporation

ADE Corporation is a leading supplier of metrology and inspection systems for the semiconductor wafer, semiconductor device, magnetic data storage and optics manufacturing industries.  Wafer suppliers and device manufacturers worldwide rely on ADE measurement and inspection systems to certify and ensure the highest quality bare silicon substrates. 

ADE's most recent generation of products serve both 65nm in-line manufacturing applications and 45nm process development.  Semiconductor device yields begin with the bare wafer and ADE's leading technology provides early insight into surface defect, shape, flatness and nanotopography of these advanced 300mm substrates. Additional information about ADE is available on the Internet at http://www.ade.com.

About KLA-Tencor:  KLA-Tencor is the world leader in yield management and process control solutions for semiconductor manufacturing and related industries.  Headquartered in San Jose, Calif., the company has sales and service offices around the world.  An S&P 500 company, KLA-Tencor is traded on the Nasdaq National Market under the symbol KLAC.  Additional information about the company is available on the Internet at

Cautionary Statement Regarding Forward-Looking Statements

This news release contains certain forward-looking statements within the meaning of the "safe harbor" provisions of the United States Private Securities Litigation Reform Act of 1995 and federal securities law.  Such forward-looking statements are subject to known and unknown risks and uncertainties that could cause actual results to differ materially from those expressed or implied by such statements.  Those statements that make reference to expectations, predictions, beliefs, and assumptions should be considered forward-looking statements.  These statements include, but are not limited to, those associated with the expected closing time for the proposed merger and the obtaining of clearance from German antitrust authorities.  These statements involve risks and uncertainties including those associated with the failure of ADE shareholders to approve the proposed merger; delays in obtaining, or adverse conditions contained in, the German antitrust authorities' regulatory approvals; failure to consummate or delay in consummating the proposed merger for other reasons, changes in laws or regulations and other similar factors.  Further information on potential factors that could affect KLA-Tencor's or ADE Corporation's respective businesses is contained in their reports on file with the Securities and Exchange Commission ("SEC"), including their respective Form 10-K's. KLA-Tencor and ADE are under no obligation to (and expressly disclaim any such obligation to) update or alter their respective forward-looking statements whether as a result of new information, future events or otherwise.

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Director Corporate Communications


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