ON Semiconductor (ON) 10-K 2004 FY Annual report

Exhibit 32

Certification

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

(Subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code)

Pursuant to section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of section 1350, chapter 63 of title 18, United States Code), each of the undersigned officers of ON Semiconductor Corporation, a Delaware corporation (“Company”), does hereby certify, to such officer’s knowledge, that:

The Annual Report on Form 10-K for the fiscal year ended December 31, 2004 (“Form 10-K”) of the Company fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934 and information contained in the Form10-K fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: March 31, 2005	/s/ KEITH D. JACKSON
	Keith D. Jackson
	President and Chief Executive Officer
Dated: March 31, 2005	/s/ DONALD COLVIN
	Donald Colvin
	Senior Vice President and Chief Financial Officer

(A signed original of this written statement required by Section 906 has been provided to ON Semiconductor Corporation and will be retained by ON Semiconductor Corporation and furnished to the Securities and Exchange Commission or its staff upon request.)