Exhibit 99.1
NEWS RELEASE
         
 
  KLA-Tencor Contacts:   Jeff Hall
 
      Chief Financial Officer
 
      (408) 875-6800
 
      jeff.hall@kla-tencor.com
 
       
 
      Kyra Whitten (Media)
 
      Sr. Director, Corporate Communications
 
      (408) 875-7819
 
      kyra.whitten@kla-tencor.com
FOR IMMEDIATE RELEASE
October 12, 2006
KLA-TENCOR COMPLETES ACQUISITION OF ADE
SAN JOSE, CA – KLA-Tencor Corporation (NasdaqGS: KLAC) today announced it has completed its acquisition of ADE Corporation (NasdaqGM: ADEX). Former ADE stockholders will receive $32.50 per share in cash. The transaction is valued at approximately $474 million.
“We are pleased to welcome ADE as part of KLA-Tencor,” stated Rick Wallace, CEO. “The addition of ADE further strengthens our leading inspection and metrology product portfolio and will deliver even more value to our cust