SEC FORM 3 SEC Form 3
FORM 3 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
 
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1. Name and Address of Reporting Person*
SIMS LARRY W

(Last) (First) (Middle)
ON SEMICONDUCTOR CORPORATION
5005 EAST MCDOWELL ROAD

(Street)
PHOENIX AZ 85008

(City) (State) (Zip)
2. Date of Event Requiring Statement (Month/Day/Year)
04/19/2004
3. Issuer Name and Ticker or Trading Symbol
ON SEMICONDUCTOR CORP [ ONNN ]
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director 10% Owner
X Officer (give title below) Other (specify below)
VP & GM Analog Products Div.
5. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)
Table II - Derivative Securities Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4) 2. Date Exercisable and Expiration Date (Month/Day/Year) 3. Title and Amount of Securities Underlying Derivative Security (Instr. 4) 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 6. Nature of Indirect Beneficial Ownership (Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Explanation of Responses:
Remarks:
(1) Judith A. Boyle is signing on behalf of Mr. Sims pursuant to a Power of Attorney dated April 19, 2004, attached herein as an exhibit.
No securities are beneficially owned.
Larry W. Sims by Judith A. Boyle as Attorney-in-Fact (1) 04/21/2004
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
POWER OF ATTORNEY
(Larry W. Sims)


	I hereby appoint Keith D. Jackson, George H. Cave
and Judith A. Boyle, and each of them, attorney-in-fact
for me, each with full power of substitution, to prepare,
execute and deliver on my behalf reports required to be
filed by me pursuant to Section 16 of the Securities
Exchange Act of 1934, as amended ("Section 16"), and Rule
144 and Rule 145 under the Securities Act of 1933 (singly
or collectively (?Rule 144?)).  Among other things, each
attorney-in-fact is authorized to file original reports
(either electronically or otherwise), signed by me or on
my behalf, on Forms 3, 4 and 5, and Form 144 with the
Securities and Exchange Commission, and to provide any
necessary copies of such signed forms to The NASDAQ Stock
Market and ON Semiconductor Corporation as required by
the rules under Section 16 and Rule 144 as in effect from
time to time.

	This power of attorney is effective from the date
hereof until April 15, 2005, unless earlier revoked or
terminated.


	/s/ Larry W. Sims
	Larry W. Sims


	Dated:	April 19, 2004


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