X0202 4 2007-02-07 0 0001097864 ON SEMICONDUCTOR CORP ONNN 0001180366 BOYCE RICHARD W 301 COMMERCE STREET, SUITE 3300 FORT WORTH TX 76102 1 0 0 0 Common Stock, par value $0.01 per share 2007-02-07 4 S 0 180000 9.60 D 209075 D Includes 10,500 Restricted Stock Units that were acquired by the Reporting Person, as reported on the Form 4 filed on March 27, 2006. (2) Mr. Clive D. Bode is signing on behalf of Mr. Boyce pursuant to an authorization and designation letter dated August 31, 2006, which was filed previously with the Securities and Exchange Commission. Clive D. Bode, on behalf of Richard W. Boyce (2) 2007-02-09