ON Semiconductor Corporation 2007 ANNUAL REPORT ® With its global logistics network and strong portfolio of power semiconductor devices, ON Semiconductor Corporation (Nasdaq: ONNN) is a preferred supplier of efficient power solutions to engineers, purchasing professionals, distributors We Are and contract manufacturers in the power supply, computer, cell phone, portable ON Semiconductor devices, communications, automotive, industrial, medical and military/aerospace markets. For more information, please visit ON Semiconductor’s website at http://www.onsemi.com. Information on our website is not incorporated into this Annual Report. The Transformation Continues March 18, 2008 In 2007, ON Semiconductor posted another solid year of performance with good revenue Letter to growth in many of our business segments. This was accomplished in spite of several negative Stockholders micro-economic events occurring during the year. Our product revenues grew by approximately three percent versus 2006 and we generated approximately $317 million in cash-flow from operating activities during the year. From a financial perspective highlights included: • Total Revenues of $1.566 billion • Record Annual Product Gross Margin of 40.4 percent • Net Income per Fully Diluted Share of $0.80 • Repurchased Approximately $55 Million of Common Stock • Record Year End Cash and Cash Equivalents Balance of $274.6 Million • Record Low Net Interest Expense of $25.8 Million From an end-market perspective, we saw strong growth in Computing with growth of 14 percent versus 2006, driven by the adoption of our power management chipsets including power factor controllers, regulators and multi-phase controllers for the desktop and power supply markets. In December, we closed the acquisition of the CPU Voltage and PC Thermal Monitoring Products Group from Analog Devices, Incorporated (ADI). With this acquisition we continue to expand our overall computing product capabilities and extend our power management expertise into the notebook and server end-markets. Over the past 12 months, we have expanded our content on more than 20 different desktop programs with six Original Equipment Manufacturer (OEM) and eight Original Design Manufacturer (ODM) accounts. The acquisition of ADI brings with it notebook controller design wins on more than ten major production programs, as well. We had a great 2007 in the Automotive end-market. We grew revenues by over ten percent versus 2006 and it was our strongest revenue year in this end-market since 2002. We believe we are well positioned for continued growth in this end-market with share gain opportunities in new infotainment platforms, where we currently have over $2.00 of content per vehicle. We’ve had a number of design wins with major international automotive manufacturers including analog drivers, controllers and regulators as well as discrete components. Those wins position us for continued automotive share expansion overseas. Our current design wins provide us with over $4.00 in content per vehicle with a variety of international manufacturers. Our revenues in the Consumer and Wireless end-markets declined slightly in 2007 versus 2006. The primary reason for this decline was that one major customer in the consumer end-market reduced their game console build rates, and one major customer in the wireless end-market reduced their handset build rates in 2007, versus the previous year. The reduction in unit builds impacted overall product revenues by over $90 million in 2007, compared to 2006. Despite these customer specific headwinds, we are confident in the long-term outlook for these end-markets and our overall product penetration with key OEMs. In the Wireless end-market we had record revenues with three of the five major handset OEMs. We also continue to increase our content on several consumer applications from MP3 players to LCD televisions. Our served available content in LCD televisions as an example is approximately $4.50 and is expected to increase to over $6.00 in 2008. We continue to help solve our customers’ power management problems through innovative product and design solutions. In 2006, we completed the purchase of the Gresham wafer fabrication facility from LSI Logic Corporation. The facility enables us with internal manufacturing capabilities to produce a larger mix of high-performance submicron analog and power products. In 2007, we began producing the first ON Semiconductor products from Gresham, our Trench MOSFETs, and in 2008, we expect to launch additional analog process technologies which will enable us to continue our journey towards becoming the leading power efficiency solutions provider in the industry. In 2007, we expanded our analog and power management capabilities with the announced acquisition of AMI Semiconductor and the acquisition of the CPU Voltage and PC Thermal Monitoring Products Group from ADI. As noted earlier, the acquisition from ADI will bolster our overall computing business and expand our expertise in the notebook controller market. Subsequent to the year end, we also closed on the stock merger of AMI Holdings Inc., and its primary operating subsidiary, AMI Semiconductor. This acquisition furthers the transformation of ON Semiconductor into an analog and power management leader with enhanced scale, higher value and higher margin products. AMI Semiconductor also contributes new products and capabilities in the medical and military/aerospace end-markets and complements our existing automotive and industrial businesses. Over time, both acquisitions will leverage the advanced sub-micron capabilities of our Gresham fabrication facility. We have enjoyed the support that we have received from our employees, customers, shareholders, partners and suppliers. We could not have achieved our successes in 2007 without you. Keith D. Jackson J. Daniel McCranie President and CEO Chairman of the Board ON Semiconductor ON Semiconductor ON Semiconductor is a leading global supplier of efficient power management products and solutions. Our broad portfolio of products for a variety of end-market applications provide Efficient Power design flexibility and help our customers efficiently manage and optimize the power required to drive and maintain their system designs. Our innovative technologies, robust designs and end Management application solutions provide the energy efficiency and reliability that engineering designers and our customers require in their home, office and on the road. We are focused on partnerships with our customers and channel partners in key end-market areas to develop new products, new technologies and new ways of doing business that will propel us toward continued future growth. We continue to expand our global network of Solutions Key Partnerships Engineering Centers (SEC’s), on-site customer design facilities, applications oriented test and design labs and field applications engineers to meet the needs of our expanding customer base. These support functions help our customers get their designs off the design bench and into production faster and more efficiently. The following graph shows a comparison of cumulative total stockholder returns for our common stock, the NASDAQ Stock Market Index for U.S. Companies and the Philadelphia Semiconductor Index (SOX) for the past five years. The graph assumes the investment of $100 on December 31, 2002, the last trading day of 2002. No cash dividends have been declared or paid on our common stock. Effective June 23, 2006, our common stock began trading on the NASDAQ Global Select Market. Prior to that date, our common stock traded on certain other markets. The prices for our common stock used to calculate stockholder returns set forth below reflect the prices as reported by the preceding markets, as applicable. The performance shown is not necessarily indicative of future performance. Our closing price on the last trading day of 2007 was $8.88. Stock Price Performance 2007 End-Market Split Performance Graph and End- Market Split Dec-02 Dec-03 Dec-04 Dec-05 Dec-06 Dec-07 ON Semiconductor $100 $471 $326 $404 $553 $648 SOX $100 $176 $150 $166 $162 $141 NASDAQ Composite $100 $150 $163 $165 $181 $199 We continue to focus our research and development efforts on key applications that address the Applications growing demands of customers throughout the world in the Automotive, Computing, Industrial, Focused Consumer and Wireless end-markets. Our products help manage power, extend battery life, protect sensitive circuits from electromagnetic and electrostatic discharge and help to convert and regulate power in the products we use every day. Our award winning global service and logistics organization is recognized world wide for its ability to exceed our customers’ expectations. We shipped more than 32 billion units in 2007 World Class through our industry leading supply chain and logistics programs. Based on our development of Service and tools, processes and an increased understanding of end-market demand, we have the ability to Logistics provide greater than 95 percent on time delivery to our key customer’s requested date. We have also increased forecast accuracy to help provide our customers with the knowledge that they will receive their products when and where they need them. Our broad portfolio, cutting edge packaging technology and our innovative products enable our customers to meet their consumer driven demands for increased functionality in smaller Exceeding form factors. In addition, we have developed products and solutions to meet and