SAN JOSE, Calif.-May 13, 2008-KLA-Tencor Corporation (NASDAQ: KLAC) today announced that its proposed acquisition of ICOS Vision Systems Corporation NV (Euronext: IVIS) is not subject to further review by any governmental authority regulating antitrust, competition or merger control matters in any jurisdiction. As a result, the closing condition to the bid relating to the antitrust review of the bid has now been satisfied.

The acceptance period for the tender offer is scheduled to end on Monday, May 19, 2008 at 4 p.m. (Central European Time). The bid price is EUR 36.50 for each share, EUR 32.76 for each 2002 warrant and EUR 5.60 for each 2007 option.

The transaction is expected to close in the second calendar quarter of 2008 but remains subject to the closing condition that the offer must be accepted by holders of at least 85% of ICOS's outstanding shares. In addition, the closing of the bid is subject to the conditions that ICOS must not distribute any new dividend to its shareholders prior to completion of the bid, as well as the absence of any material adverse change with respect to ICOS.

Additional details regarding the offer and related acceptance procedures are set forth in the prospectus related to the offer. A supplement to the prospectus will be published on May 15, 2008 to reflect the satisfaction of the closing condition to the bid relating to antitrust review. The prospectus is available in Belgium free of charge at the counters of KBC Securities, KBC Bank, CBC Banque or by phone +32 3 283 29 70 (KBC telecenter) or 0800/92020 (CBC Banque) and at Petercam. Electronic versions of the prospectus (including the acceptance form) are available on the following websites: www.kbcsecurities.be, www.kbc.be, www.cbcbanque.be, www.petercam.be and www.kla-tencor.com.

About ICOS: ICOS designs and manufactures inspection equipment for semiconductor packaging and interconnect applications. It is a world-leading supplier of equipment for the visual inspection of IC's, before they are used in various applications such as PC's, portable phones or cars. ICOS's systems perform two- and three-dimensional (2D and 3D) inspection of IC's, wafers, solar cells, substrates, sockets, etc. ICOS offers stand-alone inspection systems, as well as inspection modules for integration. ICOS is headquartered in Leuven, Belgium and has R&D centers in Belgium, Germany and Hong Kong, sales and support offices in Japan, the USA, Singapore, Hong Kong, Korea and Taiwan and production facilities in Belgium, Hong Kong and China. Additio