PHOENIX--(BUSINESS WIRE)--Jan. 20, 2005--ON Semiconductor Corp. (Nasdaq: ONNN) plans to announce its financial results for the fourth quarter ending Dec. 31, 2004, after the market closes on Wednesday, Feb. 2.

The company will host a conference call at 5 p.m. Eastern time (EST) following the release of its financial results. Investors and interested parties can access the conference call in the following manner:

• Through a webcast of the conference call via the Investors section of the company's Web site at http://www.onsemi.com. The re-broadcast of the call will be available at this site approximately one hour following the live broadcast and will continue for 30 days.
• Through a telephone call by dialing 703-639-1365. The company will provide a dial-in replay approximately one hour following the live broadcast that will continue through Feb. 9. The dial-in replay number is 703-925-2533 and the access code is 634208.
About ON Semiconductor

With its global logistics network and strong portfolio of power semiconductor devices, ON Semiconductor is a preferred supplier of power solutions to engineers, purchasing professionals, distributors and contract manufacturers in the computer, cell phone, portable devices, automotive and industrial markets. For more information, please visit ON Semiconductor's Web site at http://www.onsemi.com.

ON Semiconductor and the ON Semiconductor logo are registered trademarks of Semiconductor Components Industries, LLC. All other brand and product names appearing in this document are registered trademarks or trademarks of their respective holders. Although the company references its Web site in this news release, such information on the Web site is not to be incorporated herein.

CONTACT: ON Semiconductor, Phoenix
Everett Tackett, APR, 602-244-4534 (Public Relations)
everett.tackett@onsemi.com
Ken Rizvi, 602-244-3437 (Investor Relations)
ken.rizvi@onsemi.com
SOURCE: ON Semiconductor