KLA?Tencor Announces Results of Tender Offer to Acquire ICOS Vision Systems

KLA-Tencor Corporation (NASDAQ:KLAC) today announced the results of its

tender offer to acquire ICOS Vision Systems Corporation NV (Euronext:

IVIS). KLA-Tencor is the leading supplier of wafer front-end inspection

and metrology solutions to the global semiconductor industry; ICOS is a

leading supplier of packaging and interconnect inspection solutions for

the semiconductor industry, and has a market leadership position in the

inspection of photovoltaic solar technologies and LED lighting products. The acceptance period for the tender offer ended on Monday, May 19, 2008

at 4 p.m. (Central European Time). At the close of the initial

acceptance period for the takeover bid, 10,250,802 shares of ICOS had

been tendered, constituting 96.03% of the outstanding shares of ICOS.

The shares tendered into the bid during this initial acceptance period

are expected to be settled on May 30, 2008. "We are bringing together two long-standing leaders in separate but

complementary segments of the semiconductor capital-equipment industry

to extend our leadership as the world´s best process control company,"

said Rick Wallace, CEO of KLA-Tencor Corporation. "By combining our

complementary strengths to provide differentiated technical solutions

we are well positioned to provide even greater value for our customers

expand our product and service offerings as well as pursue new

opportunities for growth." As described in the prospectus related to the offer, because KLA-Tencor

(through its wholly owned subsidiary) will hold more than 95% of the

shares of ICOS, it will reopen the takeover bid at the same terms in

order to proceed with a squeeze-out according to article 513, section 1

of the Company Code and article 42 of the Royal Decree of 27 April 2007

on takeover bids in order to acquire all the ICOS shares and 2002

warrants (but not the 2007 options) which as of that time have not been

tendered to the bid. The bid price is EUR 36.50 for each share and EUR 32.76 for each 2002

warrant. The acceptance period for the squeeze-out bid is expected to

begin on May 28, 2008 and to continue until June 17, 2008 at 4 p.m.

(Central European Time). Further details on the conditions of the

squeeze-out bid and the subsequent delisting of the ICOS shares are

given in the formal announcement of the squeeze-out that will appear in

the Belgian press on May 22, 2008. Additional details regarding the offer and related acceptance procedures

are set forth in the prospectus related to the offer. 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 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, California

KLA-Tencor has sales and service offices around the world. An S&P 500

company, KLA-Tencor is traded on the NASDAQ Global Select Market under

the symbol KLAC. Additional information about KLA-Tencor is available at http://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. Additional information on ICOS is

available at http://www.icos.be. Disclaimer: With the exception of the CBFA, no other authority in

any other jurisdiction has approved the prospectus (including any

supplement thereto). This approval does not entail an assessment of the

suitability or quality of the bid or any possible squeeze-out. The bid

is made only in Belgium and the United States, and no steps have been or

will be taken with a view to obtaining authorization to distribute the

prospectus in countries other than Belgium and the United States. Forward Looking Statements: Statements in this press release

other than historical facts, such as statements regarding the potential

benefits and synergies that may result from the transaction, the

anticipated settlement date for the shares tendered in the bid and the

expected timing for the reopening of the bid, are forward-looking

statements, and are subject to the Safe Harbor provisions created by the

Private Securities Litigation Reform Act of 1995. These forward-looking

statements are based on current information and expectations, and

involve a number of risks and uncertainties. Actual results may differ

materially from those projected in such statements due to various

factors, including but not limited to those associated with demand for

the companies´ respective product lines; the

results of product development efforts; the success of product offerings

to meet customer needs within the timeframes required by customers in

these markets; disruption from the proposed acquisition making it more

difficult to maintain relationships with customers, vendors and

employees; the failure to obtain and retain expected synergies from the

proposed acquisition; unanticipated delays in the transferability of

funds, the timing of preparation and approval of any documentation

required in connection with the reopening of the bid or other factors.

For other factors that may cause actual results to differ materially

from those projected and anticipated in forward-looking statements in

this release, please refer to the Company´s

Annual Report on Form 10-K for the year ended June 30, 2007

subsequently filed Quarterly Reports on Form 10-Q and other filings with

the Securities and Exchange Commission (including, but not limited to

the risk factors described therein).