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SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-K

  (Mark One)

For the fiscal year ended December 31, 2003

Or

For the transition period from                      to                     

000-30419

(Commission File Number)

ON Semiconductor Corporation

(Exact name of registrant as specified in its charter)

5005 E. McDowell Road

Phoenix, AZ 85008

(602) 244-6600

(Address and telephone number of principal executive offices)

Securities Registered Pursuant to Section 12(b) of the Act:

None

Securities Registered Pursuant to Section 12(g) of the Act:

Common stock, par value $0.01 per share

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  þ    No  ¨

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained therein, and will not be contained to the best of registrant’s knowledge in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.    Yes  þ    No  ¨

Indicate by check mark whether the Registrant is an accelerated filer (as defined in Exchange Act Rule 12b-2.    Yes  þ    No  ¨

The aggregate market value of voting and non-voting common equity held by non-affiliates of the registrant was $139,263,824 as of June 30, 2003, based on the closing sale price of such stock on the Nasdaq National Market on that date. Shares held by executive officers, directors and persons owning directly or indirectly more than 10% of the outstanding common stock have been excluded from the preceding number because such persons may be deemed to be affiliates of the registrant.

The number of shares of the registrant’s common stock outstanding at March 1, 2004 was 252,832,460.

Documents Incorporated by Reference

Portions of the Proxy Statement for the Annual Meeting of Stockholders to be held on May 19, 2004 are incorporated by reference into Part III hereof.

Table of Contents

ON SEMICONDUCTOR CORPORATION

FORM 10-K

TABLE OF CONTENTS

Table of Contents

PART I

Item 1.    Business

Business Overview

We are a global supplier of power and data management semiconductors and standard semiconductor components. We design, manufacture and market an extensive portfolio of semiconductor components that addresses the design needs of sophisticated electronic systems and products. Our power management semiconductor components distribute and monitor the supply of power to the different elements within a wide variety of electronic devices. Our data management semiconductor components provide high-performance clock management and data flow management for precision computing and communications systems. Our standard semiconductor components serve as “building block” components within virtually all electronic devices.

We serve a broad base of end-user markets, including computing, automotive electronics, consumer electronics, industrial electronics, wireless communications and networking. Applications for our products in these markets include portable electronics, computers, game stations, servers, automotive and industrial automation control systems, routers, switches, storage-area networks and automated test equipment.

We have four main product lines: power management and standard analog devices, metal oxide semiconductor (MOS) power devices, high frequency clock and data management devices and standard components. Our extensive portfolio of devices enables us to offer advanced integrated circuits and the “building block” components that deliver system level functionality and design solutions. Our product portfolio currently comprises approximately 17,000 products and we shipped approximately 25.4 billion units in 2003. We specialize in micro packages, which offer increased performance characteristics while reducing the critical board space inside today’s ever shrinking electronic devices. We believe that our ability to offer a broad range of products provides our customers with single source purchasing on a cost-effective and timely basis.

We have approximately 200 direct customers worldwide, and we also service approximately 300 significant original equipment manufacturers indirectly through our distributor and electronic manufacturing service provider customers. Our direct and indirect customers include: (1) leading original equipment manufacturers in a broad variety of industries, such as Alcatel, Intel, Motorola, Nokia, Philips, Siemens and Sony; (2) electronic manufacturing service providers, such as Flextronics, Jabil and Solectron; and (3) global distributors, such as Arrow, Avnet, EBV Elektronik, Future, Solomon Enterprise and World Peace.

We currently have design operations in Arizona, Rhode Island, Texas, China, the Czech Republic and France, and we currently operate manufacturing facilities in Arizona, Rhode Island, China, the Czech Republic, Japan, Malaysia, the Philippines and Slovakia.

Immediately prior to our August 4, 1999 recapitalization, we were a wholly-owned subsidiary of Motorola, Inc. We held and continue to hold, through direct and indirect subsidiaries, substantially all of the assets and operations of the Semiconductor Components Group of Motorola’s Semiconductor Products Sector. As a result of the recapitalization, an affiliate of Texas Pacific Group owned approximately 91% and Motorola owned approximately 9% of our outstanding common stock. In addition, as part of the recapitalization, Texas Pacific Group received 1,500 shares and Motorola received 590 shares of our mandatorily redeemable preferred stock with a liquidation value of $209.0 million plus accrued and unpaid dividends. Motorola also received a $91.0 million junior subordinated note due 2011 issued by Semiconductor Components Industries, LLC, our primary domestic operating subsidiary. Cash payments to Motorola in connection with the recapitalization were financed through equity investments by affiliates of Texas Pacific Group totaling $337.5 million, borrowings totaling $740.5 million under our $875.0 million senior bank facilities and the issuance of $400.0 million of 12% senior subordinated notes due August 2009. Because Texas Pacific Group’s affiliate did not acquire substantially all of

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our common stock, the recapitalization did not impact the basis of our assets and liabilities for financial reporting purposes. At the time of the recapitalization, Motorola agreed to provide us with transition and manufacturing services in order to facilitate our transition to a stand-alone company independent of Motorola.

On April 3, 2000, we acquired all of the outstanding capital stock of Cherry Semiconductor Corporation for $253.2 million in cash (including acquisition related costs), which we financed with cash on hand and borrowings of $220.0 million under our senior bank facilities. Cherry Semiconductor Corporation, which we have renamed Semiconductor Components Industries of Rhode Island, Inc., designs and manufactures analog and mixed signal integrated circuits for the power management and automotive markets.

On May 3, 2000, we completed the initial public offering of our common stock, selling 34.5 million shares with an issue price of $16 per share. Net proceeds from the initial public offering (after deducting issuance costs) were approximately $514.8 million. The net proceeds were used to redeem all outstanding preferred stock (including accrued dividends), redeem a portion of the senior subordinated notes and prepay a portion of the loans outstanding under the senior bank facilities. (See Note 11 “Common Stock” of the notes to our audited consolidated financial statements elsewhere in this report.)

On September 7, 2001, we obtained $100.0 million ($99.2 million, net of issuance costs) through an equity investment by an affiliate of Texas Pacific Group, our principal shareholder. In this transaction, we issued 10,000 shares of mandatorily redeemable cumulative convertible preferred stock. This investment was required because we were not in compliance with certain minimum interest expense coverage ratio and leverage ratio covenants under our senior bank facilities. (See Note 7 “Long-Term Debt” and Note 10 “Redeemable Preferred Stock” of the notes to our audited consolidated financial statements and “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” in each case included elsewhere in this report).

Since our 1999 recapitalization, we have had relatively high levels of long-term debt as compared to our principal competitors. We reduced our total debt and interest expense as a result of two recent public offerings of common stock in September 2003 and February 2004, a portion of the proceeds from which we applied to prepay and redeem a portion of our outstanding debt prior to scheduled maturity. During 2002 and 2003, we engaged in several debt refinancing transactions, which extended a portion of our debt maturities. Some of the transactions that extended our debt maturities also resulted in an increase in our overall interest expense and others lowered our overall interest expense. In connection with these transactions, we amended our senior bank facilities to, among other things, make our financial covenants less restrictive on the whole. See “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and Note 7 “Long-Term Debt” and Note 11 “Common Stock” of the notes to our audited consolidated financial statements included elsewhere in this report for further details on these financing activities.

Since the fourth quarter of 2000, we have been implementing a profitability enhancement program to improve our cost structure and as a result, we expect to rank, as compared to our primary competitors, among the lowest in terms of cost structure. As a result of the elements of this program that we started in June 2001 and completed in the fourth quarter of 2002 (the 2000 plan), we achieved approximately $365 million of annualized cost savings, based on a comparison of our cost structure during the first quarter of 2001 to our cost structure during the third quarter of 2002. As a result of additional cost cutting commenced in the fourth quarter of 2002, which was completed during the fourth quarter of 2003 (the 2002 plan), we believe that we achieved an estimated $114 million of cost savings in 2003, as compared to our cost structure during the third quarter of 2002, and we expect to achieve an estimated $151 million of annual costs savings beginning in 2004 from the 2002 plan. These savings are as a result of our manufacturing rationalization plan, reductions in non-manufacturing personnel and other cost controls. Our manufacturing rationalization plan included movement of our manufacturing operations from high cost regions in North America to lower cost regions in Asia and Central Europe. As a result, approximately 79% of our cost of goods sold in 2003 related to our manufacturing operations outside of North America. More recently, we announced that we intend to phase out our manufacturing operations in East Greenwich, R.I. and our assembly and test operations in the Czech Republic. We estimate these activities will be complete by the end of 2004.

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Products and Technology

The following table provides information regarding our primary product lines:

Power Management and Standard Analog.    One of the fastest growing segments within the analog market is power management. We are one of the largest suppliers of power management analog products. We have a complete power management portfolio in the six major product categories, which include DC/DC converters, AC/DC converters, linear regulators, pulse width modulation (PWM)/power factor modulation (PFM) controllers, power factor controller (PFC) pre-regulators and battery charging/management integrated circuits. Our products are engineered and manufactured to meet the power management needs of high-performance applications in the wireless, automotive and computing markets. Specifically in the computing market, we design controllers that meet the power requirements for today’s advanced microprocessors.

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MOS Power Devices.    We are a global supplier of power devices and ignition insulated gate bipolar transistors (IGBT’s). We have a complete power management portfolio of devices ranging from 8V up to 400V. Our products are engineered and manufactured to meet the power management needs of high-performance applications in the wireless, automotive and computing markets. We are advancing our portfolio to include multi function IC’s and multi chip modules for the automotive and computing markets.

High Frequency Clock and Data Management.    Our high frequency clock and data management products consist primarily of high margin emitter-coupled logic products. We are the market leader in this area with a market share in excess of 75%. We design and deliver application-specific integrated circuits using advanced technologies that address the high-performance needs of networking infrastructure, advanced test equipment and high end computing. Our extensive clock and data management portfolio, led by our GigaComm family, is designed into state-of-the-art systems such as communication and networking switches, high-end servers, high-performance work stations, storage networks and precision measurement test systems. We enable application specific designs for today’s advanced networks, including Asynchronous Transfer Mode (ATM), Enterprise Networks, Storage Area Networks (SAN) and Internet Protocol (IP) applications.

Standard Components.    We are a global supplier of standard semiconductors. We have special competencies in manufacturing surface mount packages. Our broad product line includes MicroIntegration^™, MiniGate^™ logic, small signal transistors and diodes, zeners, rectifiers, standard logic integrated circuits, bipolar power transistors and thyristors. Standard components are essential in substantially all modern pieces of electronic equipment, including computers, printers, wireless communication devices, DVD and MP3 players, video game consoles, and automotive navigation systems.

Customers

We have been doing business with 46 of our 50 largest customers for more than five years. Sales agreements with customers are renewable periodically and contain certain terms and conditions with respect to payment, delivery, warranty and supply but do not require minimum purchase commitments. Most of our original equipment manufacturer customers negotiate pricing terms with us on an annual basis near the end of the calendar year while our other customers generally negotiate pricing terms with us on a quarterly basis. Our products are ultimately purchased for use in a variety of end markets: computing, automotive electronics, consumer electronics, industrial electronics, wireless communications and networking. Sales to our largest customers, Arrow, Avnet and Motorola, accounted for approximately 9%, 13% and 7%, respectively, of our total revenue during 2003, as compared to 10%, 10% and 8% during 2002.

We generally warrant that products sold to our customers will, at the time of shipment, be free from defects in workmanship and materials and conform to our approved specifications. Subject to certain exceptions, our standard warranty extends for a period that is the greater of (1) three years from the date of shipment or (2) the period of time specified in the customer’s standard warranty (provided that the customer’s standard warranty is stated in writing and extended to purchasers at no additional charge). Warranty expense to date has been minimal. Generally, our customers may cancel orders 30 days prior to shipment without incurring a significant penalty. For additional information regarding agreements with our customers, see “Backlog” below.

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The following table sets forth our principal end-user markets, the estimated percentage (based in part on information provided by our distributors and electronic manufacturing service providers) of our total revenues generated from each end-user market during 2003, sample applications for our products and representative original equipment manufacturer customers and end users.

End Markets for Our Products

Original Equipment Manufacturers.    Direct sales to original equipment manufacturers accounted for approximately 42% of our revenues in 2003, approximately 48% in 2002, and approximately 47% in 2001. These customers include a variety of companies in the electronics industry such as Alcatel, Intel, Motorola, Nokia, Philips, Siemens and Sony, and in the automotive industry such as DaimlerChrysler, Delphi, TRW and Visteon. We focus on three types of original equipment manufacturers: multi-nationals, selected regional accounts and target market customers. Large multi-nationals and selected regional accounts, which are significant in specific markets, are our core original equipment manufacturer customers. The target market customers in the communications, power management and standard analog and the high frequency clock and data management markets are original equipment manufacturers that are on the leading edge of specific technologies

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and provide direction for technology and new product development. Generally, our original equipment manufacturer customers do not have the right to return our products other than pursuant to the provisions of our standard warranty.

Distributors.    Sales to distributors accounted for approximately 47% of our revenues in 2003, approximately 41% in 2002, and approximately 43% in 2001. Our distributors, which include Arrow, Avnet, EBV Elektronik, Future, Solomon Enterprise and World Peace resell to mid-sized and smaller original equipment manufacturers and to electronic manufacturing service providers and other companies. Sales to distributors are typically made pursuant to agreements that provide return rights with respect to discontinued or slow-moving products. Under certain agreements, distributors are allowed to return any product that we have removed from our price book or that is more than four years older than the manufacturing code date. In addition, agreements with our distributors typically contain standard stock rotation provisions permitting limited levels of product returns. However, since we defer recognition of revenue and gross profit on sales to distributors until the distributor resells the product, sales returns have minimal impact on our profits.

Electronic Manufacturing Service Providers.    Direct sales to electronic manufacturing service providers accounted for approximately 11% of our revenues in 2003, approximately 11% in 2002 and approximately 10% in 2001. Our largest electronic manufacturing service customers are Flextronics, Jabil and Solectron. These customers are manufacturers who typically provide contract manufacturing services for original equipment manufacturers. Originally, these companies were involved primarily in the assembly of printed circuit boards, but they now typically provide design, supply management and manufacturing solutions as well. Many original equipment manufacturers now outsource a large part of their manufacturing to electronic manufacturing service providers in order to focus on their core competencies. We are pursuing a number of strategies to penetrate this increasingly important marketplace.

Manufacturing Operations

We operate our manufacturing facilities either directly or through a joint venture. Five of these are front-end wafer facilities located in Japan, Slovakia, Malaysia and the United States; three are back-end assembly and test facilities located in China, Malaysia and the Philippines; and one is an integrated front-end and back-end facility located in the Czech Republic. In addition to these manufacturing and assembly operations, our facility in Roznov, Czech Republic manufactures raw wafers that are used by a number of our facilities.

During 2001, we decided to shut down our integrated facility in Guadalajara, Mexico and transfer the front-end and back-end manufacturing to other owned and contracted locations. Accordingly, the Guadalajara, Mexico facility ceased operations in the second quarter of 2002 and was sold in the third quarter of 2003. In November 2003, we announced our decision to discontinue our assembly and test operations at our site in Roznov, Czech Republic and move these operations to our facility in Seremban, Malaysia and to contract manufacturers. In December 2003, we announced our decision to phase out manufacturing operations at our facility in East Greenwich, R.I. We estimate this closure will be complete by the end of 2004. We plan to transfer most of the production of this facility to our lower cost manufacturing facilities outside of North America and the balance to lower cost contract manufacturers.

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The table below sets forth information with respect to the manufacturing facilities we operate either directly or through our joint venture, as well as the products produced at these facilities. The sizes of the locations represent the approximate gross square feet of each site’s building and include, among other things, manufacturing, laboratory, warehousing, office, utility, support and unused areas.

Our operations in the Czech Republic are held through a publicly traded Czech company, of which we owned approximately 90% of the outstanding equity interests as of December 31, 2003. We purchased 100%, 95% and 88% of the raw wafer output in 2003, 2002 and 2001, respectively, and purchased the entire output of the integrated facility for all three years. In 2001, we entered into a new seven-year agreement with this subsidiary pursuant to which we have agreed to purchase minimum amounts of product based on our forecasted quarterly requirements.

We operate a back-end manufacturing facility in Leshan, China. We own this facility through a joint venture company, Leshan-Phoenix Semiconductor Company Ltd of which we owned a majority of the outstanding equity interests as of December 31, 2003. Our joint venture partner, Leshan Radio Company Ltd. is a formerly state-owned enterprise. Pursuant to the joint venture agreement, requests for production capacity are made to the board of directors of Leshan by each shareholder of the joint venture. Each request represents a purchase commitment by the requesting shareholder, provided that the shareholder may elect to pay the cost associated with the unused capacity (which is generally equal to the fixed cost of the capacity) in lieu of satisfying the commitment. We committed to purchase 82%, 85% and 81% of Leshan’s production capacity in 2003, 2002 and 2001, respectively, and are currently committed to purchase 86% of Leshan’s expected production capacity in 2004. In 2003, 2002 and 2001, we incurred $0.5 million, $1.5 million and $6.4 million in underutilization charges, respectively. As part of our manufacturing agreements with Leshan, we supply die used in the production process.

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The Leshan facility is one of our lowest cost manufacturing operations, and we anticipate that any future expansion of our manufacturing capacity would involve this facility, including the previously announced start of construction in August 2002 of a 6-inch wafer fabrication facility. In June 2002, we obtained approval from the Chinese government for the Leshan joint venture to invest up to $231 million in semiconductor operations, which is in addition to the $278 million originally approved. We have the ability to pace these expenditures at our discretion to meet market demand and therefore expect these investments to occur gradually over time.

Our manufacturing processes use many raw materials, including silicon wafers, copper lead frames, mold compound, ceramic packages and various chemicals and gases. We have no material agreements with any of our suppliers that impose minimum or continuing supply obligations and we obtain our raw materials and supplies from a large number of sources on a just-in-time basis. From time to time, suppliers may extend lead times, limit supplies or increase prices due to capacity constraints or other factors. Although we believe that supplies of the raw materials we use are currently and will continue to be available, shortages could occur in various essential materials due to interruption of supply or increased demand in the industry.

We also use third-party contractors for some of our manufacturing activities, primarily for wafer fabrication and the assembly and testing of final goods. Our agreements with these contract manufacturers typically require us to forecast product needs and commit to purchase services consistent with these forecasts. In come cases, longer-term commitments are required in the early stages of the relationship. These contract manufacturers, including Amkor, PSI, AIT, ASE, KEC, Hynix, Liteon, Chartered and Phenitec, accounted for approximately 26%, 30% and 31% of our cost of sales in 2003, 2002 and 2001, respectively. The reductions in the use of third-party contractors reflect our efforts to improve internal capacity utilization under our manufacturing rationalization plan.

We entered into an agreement with Motorola to continue to provide manufacturing services to each other for limited periods of time following our 1999 recapitalization. We negotiated fixed prices with Motorola for the services covered by these agreements to approximate each party’s cost of providing the services. For 2003, 2002, and 2001, Motorola purchased $3.4 million, $1.4 million and $8.2 million, respectively, of manufacturing services from us with no minimum purchase commitments going forward at this time. These purchases are classified as revenues in our financial statements. We purchased $8.9 million, $14.3 million and $87.4 million of manufacturing services from Motorola in 2003, 2002 and 2001, respectively, fulfilling our minimum commitments to purchase manufacturing services from Motorola during such periods. We currently have no minimum commitments to purchase manufacturing services from Motorola.

Sales, Marketing and Distribution

As of December 31, 2003, our global sales and marketing organization consists of approximately 406 professionals operating out of approximately 45 offices and serving customers in 37 countries. We support our customers through logistics organizations and just-in-time warehouses. Global and regional distribution channels further support our customers’ needs for quick response and service. We offer efficient, cost-effective internet-based applications support from our laboratories in the Czech Republic, China and the United States. Through on-line connectivity, applications developed in one region of the world are now instantaneously available to all other regions. Pursuant to our restructuring programs, we have downsized our sales force by approximately 230 employees, closed approximately 20 of our sales offices and, in some regions, converted sales personnel to sales representatives. In addition, we have centralized and relocated our order entry functions to low cost locations. Motorola agreed to provide us with worldwide shipping and freight services for a period of up to three years following our 1999 recapitalization. This resulted in better prices than we could obtain from third parties. Cost increases resulting from the termination of the shipping and freight service agreement in July 2002 were estimated to be approximately $11 million in 2002 as compared to 2001. We have negotiated improved freight agreements and changed some logistic flows to offset some of the increase in our 2003 total freight costs.

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Patents, Trademarks, Copyrights and Other Intellectual Property Rights

We market our products under our registered trademark ON Semiconductor^® and our ON logo. We own rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property directly related to and important to our business. In connection with our 1999 recapitalization, Motorola assigned, licensed, or sublicensed, as the case may be, to us certain intellectual property to support and continue the operation of our business. As of January 16, 2004, we had approximately 474 U.S. and foreign patents and approximately 187 patent applications pending worldwide. Our patents have expiration dates ranging from 2004 to 2022. None of our patents that expire in the near future materially affect our business. Additionally, we hold more than 230 U.S. and foreign trademarks and applications. Our policy is to protect our products and processes by asserting our intellectual property rights where appropriate and prudent and by obtaining patents, copyrights and other intellectual property rights used in connection with our business when practicable and appropriate.

Under an intellectual property agreement that we entered into with Motorola as part of our 1999 recapitalization, Motorola assigned approximately 295 U.S. patents and patent applications, approximately 292 foreign patents and patent applications, rights to over 50 trademarks (not including the Motorola name) previously used in connection with our products, rights in know-how relating to at least 39 semiconductor fabrication processes and rights in specified copyrightable materials. In addition, Motorola licensed on a non-exclusive, royalty-free basis other patent, trademark, copyright and know-how rights used in connection with our then existing products and products contemplated in our long-range plans. We have perpetual, royalty-free, worldwide rights under Motorola’s patent portfolio and other intellectual property, existing as of the date of our recapitalization or created in the five years thereafter (the five-year period existing only with respect to patents), as necessary to manufacture, market, and sell our then existing and long range plan product lines. Additionally, Motorola provided us with a limited indemnity umbrella to protect us from certain infringement claims by third parties who had granted Motorola licenses as of the date of our recapitalization, which will assist us in developing our own patent position and licensing program. We believe that we have the right to use all Motorola-owned technology used in connection with the products we currently offer.

Seasonality

Historically, our revenues have been affected by the seasonal trends of the semiconductor and related industries. As a result of these trends, we typically experienced sales increases in the first two quarters of the year and relatively flat sales levels in the third and fourth quarters. However, over the past three years, various events have disrupted this pattern. Throughout 2001, revenues declined due to slowing demand in the semiconductor market and the general economic decline. In 2002 and 2003, revenues fluctuated within a narrow range and at this time, it is unclear when the semiconductor industry is going to return to its seasonal trends.

Backlog

Our trade sales are made primarily pursuant to standard purchase orders that are booked as far as 26 weeks in advance of delivery. Generally, prices and quantities are fixed at the time of booking. Backlog as of a given date consists of existing orders and forecasted demands from our Electronic Data Interface customers, in each case scheduled to be shipped over the 13-week period following such date. Backlog is influenced by several factors including market demand, pricing and customer order patterns in reaction to product lead times. Because we record revenues on a “sell-through” basis, backlog comprised of orders from distributors will not result in revenues until the distributors sell the products ordered. During 2003, our backlog at the beginning of each quarter represented between 76% and 81% of actual revenues during such quarter. As manufacturing capacity utilization in the industry increases, customers tend to order products further in advance and, as a result, backlog at the beginning of a period as a percentage of revenues during such period is likely to increase.

In the semiconductor industry, backlog quantities and shipment schedules under outstanding purchase orders are frequently revised to reflect changes in customer needs. Agreements calling for the sale of specific quantities are either contractually subject to quantity revisions or, as a matter of industry practice, are often not enforced.

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Therefore, a significant portion of our order backlog may be cancelable. For these reasons, the amount of backlog as of any particular date may not be an accurate indicator of future results.

We sell products to key customers pursuant to contracts that allow us to schedule production capacity in advance and allow the customers to manage their inventory levels consistent with just-in-time principles while shortening the cycle times required to produce ordered product. However, these contracts are typically amended to reflect changes in customer demands and periodic price renegotiations.

Competition

The semiconductor industry, particularly the market for general-purpose semiconductor products like ours, is highly competitive. Although only a few companies compete with us in all of our product lines, we face significant competition within each of our product lines from major international semiconductor companies, as well as smaller companies focused on specific market niches. Because our components are often building block semiconductors that in some cases can be integrated into more complex integrated circuits, we also face competition from manufacturers of integrated circuits, application-specific integrated circuits and fully customized integrated circuits, as well as customers who develop their own integrated circuit products. (See “Risk Factors — Competition in our industry could prevent us from maintaining our revenues and from raising prices to offset increases in costs” elsewhere in this report.)

We compete with respect to power management and standard analog products, standard components, MOS power devices and high frequency clock and data management products in the following manner:

Power Management and Standard Analog product line

The principal methods of competition in this product line are new product innovation, technical performance, quality, service and price. Our competitive strengths in this product line are our strong technology and design resources, our industry recognition in applications, such as automotive, and our market share in this segment. Our significant competitors in this market include Fairchild, Linear Technology, National Semiconductor, New Japan Radio, ST Microelectronics, and Texas Instruments. Several of these competitors are larger in scale and size, have substantially greater financial and other resources with which to pursue development, engineering, manufacturing, marketing and distribution of their products and are better able to withstand adverse economic or market conditions. A competitive challenge in this product line is our small market share with certain Japanese customers that tend to favor local suppliers for their new product designs. If we are not identified as a vendor in the product design phase, in most cases it is difficult to convince the manufacturer of the product to substitute our components during the production phase.

Standard Components product line

The principal methods of competition in this product line are price, technical performance, quality and service. Our competitive strengths in this product line are the breadth of our portfolio, our low cost manufacturing capability, our global market presence and our ability to service broad application market segments. The strong acceptance of ON’s MicroIntegration^™ capability (with ability to integrate both active and passive components in multi-chip or monolithic approaches) into various applications in our existing markets is an additional competitive strength in this product line. Our significant competitors in this market include Fairchild Semiconductor, Philips, Renesas, Rohm, ST Microelectronics, Texas Instruments, and Toshiba. Several of these competitors are larger in scale and size, have substantially greater financial and other resources with which to pursue development, engineering, manufacturing, marketing and distribution of their products and are better able to withstand adverse economic or market conditions. A competitive challenge in this product line is our small market share with certain Japanese customers that tend to favor local suppliers for their new product designs. If we are not identified as a vendor in the product design phase, in most cases it is difficult to convince the manufacturer of the product to substitute our components during the production phase.

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MOS Power Devices product line

The principal methods of competition in this product line are new product innovation, technical performance, price, quality and service. Our competitive strengths in this product line are our strong presence in areas such as IGBT’s and low voltage planar technology, our broad product offering, and our state-of-the-art trench technology. Our significant competitors in this market include Fairchild, Infineon, International Rectifier, Renesas, ST Microelectronics and Vishay. Several of these competitors are larger in scale and size, have substantially greater financial and other resources with which to pursue development, engineering, manufacturing, marketing and distribution of their products and are better able to withstand adverse economic or market conditions. A competitive challenge in this product line is our small market share with certain Japanese customers that tend to favor local suppliers for their new product designs. If we are not identified as a vendor in the product design phase, in most cases it is difficult to convince the manufacturer of the product to substitute our components during the production phase.

High Frequency Clock and Data Management product line

The principal methods of competition in this product line are new product innovation, technical performance, quality, service and price. Our competitive strengths in this product line are our use of specialized high speed materials like silicon germanium and the volume benefits which come from being one of the largest suppliers in this segment. Our significant competitors in this market include Fairchild, Maxim, Micrel, Motorola and Semtech. Although we have a significant share in this market, the total potential revenue has been reduced commensurate with the downturn in the networking, telecommunications and automated test equipment market segments, which currently drive the applications for this product.

Research and Development

Company-sponsored research and development costs in 2003, 2002 and 2001 were $85.5 million (8.0% of revenues), $81.5 million (7.5% of revenues) and $94.5 million (7.7% of revenues), respectively. The primary emphasis of our new product development efforts is on power management and standard analog and high frequency clock and data management solutions, the highest margin product lines within our portfolio, with over 70% of our overall research and development investments currently targeted in these areas. Since our IPO in May 2000, we have introduced over 1,000 new products, and the portion of our revenue attributable to new products has increased over the last three years.

Government Regulation

Our manufacturing operations are subject to environmental and worker health and safety laws and regulations. These laws and regulations include those relating to emissions and discharges into the air and water; the management and disposal of hazardous substances; the release of hazardous substances into the environment at or from our facilities and at other sites; and the investigation and remediation of resulting contamination.

Our manufacturing facility in Phoenix, Arizona is located on property that is a “Superfund” site, a property listed on the National Priorities List and subject to clean-up activities under the Comprehensive Environmental Response, Compensation, and Liability Act. Motorola is actively involved in the cleanup of on-site solvent contaminated soil and groundwater and off-site contaminated groundwater pursuant to consent decrees with the State of Arizona. As part of our 1999 recapitalization, Motorola has retained responsibility for this contamination, and has agreed to indemnify us with respect to remediation costs and other costs or liabilities related to this matter.

Manufacturing facilities in Slovakia and those of our majority-owned subsidiary in the Czech Republic have ongoing remediation projects to respond to releases of hazardous substances that occurred during the years that these facilities were operated by government-owned entities. In each case, these remediation projects consist primarily of monitoring groundwater wells located on-site and off-site with additional action plans developed to

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respond in the event activity levels are exceeded at each of the respective locations. The governments of the Czech Republic and Slovakia have agreed to indemnify us and the respective subsidiaries, subject to specified limitations, for remediation costs associated with this historical contamination. Based upon the information available, we do not believe that total future remediation costs to us will be material.

Our manufacturing facility in East Greenwich, Rhode Island has adjoining property that has localized soil contamination. In connection with the purchase of the facility, we entered into a Settlement Agreement and Covenant Not To Sue with the State of Rhode Island. This agreement requires that remedial actions be undertaken and a quarterly groundwater monitoring program be initiated by the former owners of the property. Based on the information available, we do not believe that any costs to us in connection with this matter will be material.

We believe that our operations are in material compliance with applicable environmental and health and safety laws and regulations. We do not expect the cost of compliance with existing environmental and health and safety laws and regulations, and liability for currently known environmental conditions, to have a material adverse effect on our business or prospects. It is possible, however, that future developments, including changes in laws and regulations, government policies, customer specification, personnel and physical property conditions, including currently undiscovered contamination, could lead to material costs.

Employees

As of December 31, 2003, we employed approximately 10,055 worldwide. We do not currently have any collective bargaining arrangements with our employees, except for those arrangements, such as works councils, that are obligatory for all employees or all employers in a particular industry under applicable foreign law. Of the total number of our employees as of December 31, 2003, approximately 8,857 were engaged in manufacturing and information services, approximately 406 were engaged in our sales and marketing organization and in customer service, approximately 325 were engaged in administration and approximately 467 were engaged in research and development.

Executive Officers of the Registrant

See Part III, Item 10 of this report for information concerning executive officers.

Geographical Information

For certain geographic operating information, see Note 19, “Segment Information” of the notes to our audited consolidated financial statements and Management’s Discussion and Analysis of Financial Condition and Results of Operations, in each case, as included elsewhere in this report. For information regarding the risks associated with our foreign operations, see Management’s Discussion and Analysis of Financial Condition and Results of Operations — Trends, Risks and Uncertainties — “Our international operations subject us to risks inherent in doing business on a international level that could adversely impact our results of operations” elsewhere in this report.

Available Information

We make our annual report on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and all amendments to those reports available, free of charge, in the “Investor Relations” section of our Internet website at http://www.onsemi.com as soon as reasonably practicable after we electronically file this material with, or furnish this material to, the Securities and Exchange Commission.

You may also read or copy any materials that we file with the SEC at their Public Reference Room at 450 Fifth Street, NW, Washington, DC 20549. You may obtain additional information about the Public Reference

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Room by calling the SEC at 1-800-SEC-0330. Additionally, you will find these materials on the SEC Internet site at http://www.sec.gov that contains reports, proxy statements and other information regarding issuers that file electronically with the SEC.

Item 2.    Properties

In the United States, our corporate headquarters as well as manufacturing, research and development and warehouse operations are located in approximately 1.8 million square feet of space in properties that we own in Phoenix, Arizona and East Greenwich, Rhode Island. We also lease properties around the world for use as sales offices, research and development labs, warehouses, logistic centers and trading offices. The size and/or location of these properties change from time to time based on business requirements. We operate distribution centers, which are leased or contracted through a third party, in locations throughout Asia, Europe and the Americas. We own our manufacturing facilities in the United States, Japan, Malaysia, the Philippines, Slovakia and the Czech Republic. These facilities are primarily manufacturing operations, but also include office, utility, laboratory, facilities, warehouse and unused space. Our joint venture in Leshan, China also owns manufacturing, warehouse, laboratory, office and unused space.

In November 2003, we announced our decision to discontinue our assembly and test operations at our site in Roznov, Czech Republic and move these operations to our facility in Seremban, Malaysia and to contract manufacturers. In December 2003, we announced our decision to phase out manufacturing operations at our facility in East Greenwich, R.I. We estimate this closure will be complete by the end of 2004. We plan to transfer most of the production of this facility to our lower cost manufacturing facilities outside of North America and the balance to lower cost contract manufacturers, resulting in an expected reduction of 330 jobs.

As part of our 1999 recapitalization, Motorola conveyed to us the surface rights to a portion of the land located at our Phoenix facility, excluding the subsurface rights, and conveyed buildings located at the Phoenix facility. These buildings do not include any treatment facilities relating to Motorola’s environmental clean-up operations at the Phoenix facility. We executed a declaration of covenants, easements and restrictions with Motorola providing access easements for the parties and granting to us options to purchase or to lease the subsurface rights of the land. Motorola leased approximately 70,000 square feet of space at our Phoenix facility pursuant to an agreement that expired in June 2003. Motorola ceased manufacturing at our Phoenix facility during 2002 and substantially removed their equipment, material and personnel from the site as of December 31, 2002.

We believe that our facilities around the world, whether owned or leased, are well maintained. We believe that we have sufficient access to productive capacity to meet our needs for the majority of the products in our business lines for the foreseeable future.

We have pledged substantially all of our tangible and intangible assets and similar assets of each of our existing and subsequently acquired or organized domestic subsidiaries (but no more than 65% of the capital stock of foreign subsidiaries held by them) to secure our senior bank facilities, first lien secured notes and second lien secured notes.

Item 3.    Legal Proceedings

We currently are involved in a variety of legal matters that arise in the normal course of business. Based on information currently available, management does not believe that the ultimate resolution of these matters, including the matters described in the next paragraphs, will have a material adverse effect on our financial condition, results of operations or cash flows.

During the period July 5, 2001 through July 27, 2001, we were named as a defendant in three shareholder class action lawsuits that were filed in federal court in New York City against us and certain of our former

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officers, current and former directors and the underwriters for our initial public offering. The lawsuits allege violations of the federal securities laws and have been docketed in the U.S. District Court for the Southern District of New York as: Abrams v. ON Semiconductor Corp., et al., C.A. No. 01-CV-6114; Breuer v. ON Semiconductor Corp., et al., C.A. No. 01-CV-6287; and Cohen v. ON Semiconductor Corp., et al., C.A. No. 01-CV-6942. On April 19, 2002, the plaintiffs filed a single consolidated amended complaint that supersedes the individual complaints originally filed. The amended complaint alleges, among other things, that the underwriters of our initial public offering improperly required their customers to pay the underwriters excessive commissions and to agree to buy additional shares of our common stock in the aftermarket as conditions of receiving shares in our initial public offering. The amended complaint further alleges that these supposed practices of the underwriters should have been disclosed in our initial public offering prospectus and registration statement. The amended complaint alleges violations of both the registration and antifraud provisions of the federal securities laws and seeks unspecified damages. We understand that various other plaintiffs have filed substantially similar class action cases against approximately 300 other publicly traded companies and their public offering underwriters in New York City, which have all been transferred, along with the case against us, to a single federal district judge for purposes of coordinated case management. We believe that the claims against us are without merit and have defended, and intend to continue to defend, the litigation vigorously. The litigation process is inherently uncertain, however, and we cannot guarantee that the outcome of these claims will be favorable for us.

On July 15, 2002, together with the other issuer defendants, we filed a collective motion to dismiss the consolidated, amended complaints against the issuers on various legal grounds common to all or most of the issuer defendants. The underwriters also filed separate motions to dismiss the claims against them. In addition, the parties have stipulated to the voluntary dismissal without prejudice of our individual former officers and current and former directors who were named as defendants in our litigation, and they are no longer parties to the litigation. On February 19, 2003, the Court issued its ruling on the motions to dismiss filed by the underwriter and issuer defendants. In that ruling the Court granted in part and denied in part those motions. As to the claims brought against us under the antifraud provisions of the securities laws, the Court dismissed all of these claims with prejudice, and refused to allow plaintiffs the opportunity to re-plead these claims. As to the claims brought under the registration provisions of the securities laws, which do not require that intent to defraud be pleaded, the Court denied the motion to dismiss these claims as to us and as to substantially all of the other issuer defendants as well. The Court also denied the underwriter defendants’ motion to dismiss in all respects.

In June 2003, upon the determination of a special independent committee of our Board of Directors, we elected to participate in a proposed settlement with the plaintiffs in this litigation. If ultimately approved by the Court, this proposed settlement would result in a dismissal, with prejudice, of all claims in the litigation against us and against any of the other issuer defendants who elect to participate in the proposed settlement, together with the current or former officers and directors of participating issuers who were named as individual defendants. The proposed settlement does not provide for the resolution of any claims against the underwriter defendants, and the litigation against those defendants is continuing. The proposed settlement provides that the class members in the class action cases brought against the participating issuer defendants will be guaranteed a recovery of $1 billion by the participating issuer defendants. If recoveries totaling less than $1 billion are obtained by the class members from the underwriter defendants, the class members will be entitled to recover the difference between $1 billion and the aggregate amount of those recoveries from the participating issuer defendants. If recoveries totaling $1 billion or more are obtained by the class members from the underwriter defendants, however, the monetary obligations to the class members under the proposed settlement will be satisfied. In addition, we and any other participating issuer defendants will be required to assign to the class members certain claims that we may have against the underwriters of our initial public offerings.

The proposed settlement contemplates that any amounts necessary to fund the settlement or settlement-related expenses would come from participating issuers’ directors and officers’ liability insurance policy proceeds as opposed to funds of the participating issuer defendants themselves. A participating issuer defendant could be required to contribute to the costs of the settlement if that issuer’s insurance coverage were insufficient

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to pay that issuer’s allocable share of the settlement costs. We expect that our insurance proceeds will be sufficient for these purposes and that we will not otherwise be required to contribute to the proposed settlement. Consummation of the proposed settlement is conditioned upon, among other things, negotiating, executing, and filing with the Court final settlement documents, and final approval by the Court. Formal settlement documents for submission to the Court are currently being drafted. If the proposed settlement described above is not consummated, however, we intend to continue to defend the litigation vigorously. While we can make no promises or guarantees as to the outcome of these proceedings, we believe that the final result of these actions will have no material effect on our consolidated financial condition, results of operations or cash flows.

See “Government Regulation” above for information on environmental matters.

Item 4.    Submission of Matters to a Vote of Security Holders

None

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PART II

Item 5.    Market for Registrant’s Common Equity and Related Stockholder Matters

Our common stock has traded under the symbol “ONNN” on the Nasdaq National Market since April 28, 2000, except for the period from October 25, 2002 until September 3, 2003 during which our common stock was quoted on the Nasdaq SmallCap Market. The following table sets forth the high and low closing sale prices for our common stock for the fiscal periods indicated as reported by the Nasdaq National Market or the Nasdaq SmallCap Market, as applicable.

Range of Sales Price

As of March 1, 2004, there were approximately 243 record holders of our common stock and 252,832,460 shares of common stock outstanding.

We have neither declared nor paid any cash dividends on our common stock since our initial public offering, and we do not presently intend to do so. Our future dividend policy with respect to our common stock will depend upon our earnings, capital requirements, financial condition, debt restrictions and other factors deemed relevant by our Board of Directors. Each of our senior bank facilities, senior secured first lien notes, senior secured second lien notes, senior subordinated notes and preferred stock restricts our ability to pay cash dividends to our common stockholders.

Equity Compensation Plan Table

See Part III, Item 11 of this report for information regarding our current equity compensation plans as of December 31, 2003.

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Item 6.    Selected Financial Data

The following table sets forth certain of our selected financial data for the periods indicated. We derived the statement of operations and cash flow data set forth below for the years ended December 31, 2003, 2002, 2001 and 2000 and the period from August 4, 1999 through December 31, 1999, and the balance sheet data for December 31, 2003, 2002, 2001, 2000 and 1999, from our audited post-recapitalization consolidated financial statements. We derived the statement of operations data set forth below for the period from January 1, 1999 through August 3, 1999, from our audited pre-recapitalization combined financial statements. You should read this information in conjunction with “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and our audited consolidated financial statements included elsewhere in this report.

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Item 7.    Management’s Discussion and Analysis of Financial Condition and Results of Operations

You should read the following discussion in conjunction with our audited historical consolidated financial statements, which are included elsewhere in this Form 10-K. Management’s Discussion and Analysis of Financial Condition and Results of Operations contains statements that are forward-looking. These statements are based on current expectations and assumptions that are subject to risk, uncertainties and other factors. Actual results could differ materially because of the factors discussed in “Trends, Risks and Uncertainties” in this Form 10-K.

Executive Overview

This section presents summary information regarding our industry, markets and operating trends only. For further information regarding the events summarized herein, you should read “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in its entirety.

Industry Overview

Worldwide semiconductor industry sales were $166.4 billion in 2003, an increase of 18.3% from 2002. We participate in unit and revenue surveys and use data summarized by the World Semiconductor Trade Statistics group to evaluate overall semiconductor market trends and also to track our progress against the total market in the areas we provide semiconductor components. The following table sets forth total worldwide semiconductor industry revenues and revenues in our total addressable market since 2000:

Following the unprecedented semiconductor industry revenue declines of 2001, the semiconductor industry began to show signs of stability in 2002 and grew more robust in 2003. Worldwide semiconductor industry sales grew by 1.2% in 2002 and 18.3% in 2003. Sales in our total addressable market grew by 2.5% in 2002 and 14.4% in 2003, reflecting increases in volume and slowing rates of price declines during the latter part of the 2003.

The most recently published estimates of WSTS project a compound annual growth rate in our total addressable market of approximately 15% during 2002 through 2005. These are projections and may not be indicative of actual results. Other industry data also indicate that the market for our products has begun to expand after the recent and prolonged downturn.

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Business Overview

We classify our products broadly as power and data management semiconductors and standard semiconductor components. We design, manufacture and market an extensive portfolio of semiconductor components that addresses the design needs of sophisticated electronic systems and products. Our power management semiconductor components control, convert, protect and monitor the supply of power to the different elements within a wide variety of electronic devices. Our data management semiconductor components provide high-performance clock management and data flow management for precision computing and communications systems. Our standard semiconductor components serve as “building block” components within virtually all electronic devices. These various products fall into the logic, analog, and discrete categories used by WSTS.

Historically, the semiconductor industry has been highly cyclical. During a down cycle, unit demand and pricing have tended to fall in tandem, resulting in revenue declines. In response to such declines, manufacturers have shut down production capacity. When new applications or other factors have eventually caused demand to strengthen, production volumes have eventually stabilized and then grown again. As market unit demand has reached levels above capacity production capabilities, shortages have begun to occur, which typically has caused pricing power to swing back from customers to manufacturers, thus prompting further capacity expansion. Such expansion has typically resulted in overcapacity following a decrease in demand, which has triggered another similar cycle.

We believe we have entered into a cycle of rising volume and prices, as our manufacturing capacity utilization has increased to over 85%, our book-to-bill ratio has exceeded 1 in each quarter of 2003 and we have been able to selectively increase prices on some products where there are market shortages.

These recent trends are in sharp contrast to the last three years during which we had to consistently reduce our costs in order to generate sufficient cash flow to fund investments in new products and expand production capabilities in lower cost areas of the world.

Cost Savings and Restructuring Activities

Since the fourth quarter of 2000, we have been implementing profitability enhancement programs to improve our cost structure and as a result, we expect to rank, as compared to our primary competitors, among the lowest in terms of cost structure. As a result of the elements of a program that we started in June 2001 and completed in the fourth quarter of 2002 (the 2000 plan), we achieved approximately $365 million of annualized cost savings, based on a comparison of our cost structure during the first quarter of 2001 to our cost structure during the third quarter of 2002. As a result of additional cost cutting commenced in the fourth quarter of 2002, which was completed during the fourth quarter of 2003 (the 2002 plan), we believe that we achieved an estimated $114 million of cost savings in 2003, as compared to our cost structure during the third quarter of 2002, and we expect to achieve an estimated $151 million of annual costs savings beginning in 2004 from the 2002 plan. These savings are as a result of our manufacturing rationalization plan, reductions in non-manufacturing personnel and other cost controls. Our manufacturing rationalization plan included movement of our manufacturing operations from high cost regions in North America to lower cost regions in Asia and Central Europe. As a result, approximately 79% of our cost of goods sold in 2003 related to our manufacturing operations outside of North America. More recently, we announced that we intend to phase out our manufacturing operations in East Greenwich, R.I. and our assembly and test operations in the Czech Republic by the end of 2004.

New Product Innovation

As a result of the success of our research and development initiatives, we introduced 176 new products in 2002 and 260 new products in 2003. The primary emphasis of our new product development efforts is on power management and high frequency clock and data management solutions, which we expect to be among the highest

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margin product families within our portfolio. The portion of our revenue attributable to new products has increased over the last three years, even though our overall revenue has declined during this period. We define new product revenue as revenue from the sale of products that we have introduced in the three years prior to and during the period measured.

Debt Reduction and Financing Activities

Since we became an independent company as a result of our 1999 recapitalization, we have had relatively high levels of long-term debt as compared to our principal competitors. Our long-term debt includes significant amounts under our senior bank facilities, which contained minimum interest coverage ratio and maximum leverage ratio covenants with which we were not in compliance as of June 29, 2001. We obtained a waiver in respect of such non-compliance and any future non-compliance through 2002 and amended our senior bank facilities to make these covenants less restrictive through 2005; however, in connection with such waiver and amendment, we added minimum cash and EBITDA covenants and agreed to pay additional supplemental interest and obtain a $100 million equity investment from our principal stockholder.

During 2002 and the first half of 2003, we completed two debt refinancing transactions and further amended our senior bank facilities in connection therewith to extend a portion of our debt maturities, reduce the supplemental interest associated with our 2001 bank amendment and make the related financial covenants less restrictive on the whole. We issued $300 million principal amount of second lien senior secured notes due 2008 and $200 million principal amount of first lien senior secured notes due 2010, the net proceeds of which were used to prepay a portion of our senior bank facilities. We incurred $22.7 million of offering expenses and increased our weighted average cost of borrowing as a result. In addition, as part of the related amendments to our senior bank facilities, we converted $62.5 million of our $125 million revolving facility into a new term loan facility.

During the second half of 2003, we began undertaking measures to reduce our long-term debt, reduce the related interest costs and, in some cases, extend a portion of our debt maturities to continue to provide us additional operating flexibility. In September 2003, we issued approximately 37.0 million shares of our common stock at a public offering price of $4.50 per share, the net proceeds of which were used to prepay a portion of our senior bank facilities. In connection with this offering, we amended our senior bank facilities to, among other things, extend the average maturity of the term loans through a refinancing of $100 million of such loans and replace our $62.5 million revolving facility with a new $25.0 million revolving facility.

In November 2003, we further amended our senior bank facilities to, among other things, reduce the interest rate on our outstanding term loans by 0.75%. In November 2003, we extended the maturity of our $20.0 million loan facility with a Chinese bank for an additional three years under the same terms and conditions. In December 2003, we prepaid approximately $48.0 million of loans under our senior bank facilities with the proceeds from a new loan facility with a Chinese bank that bears interest at LIBOR plus 1.5%, as compared to LIBOR plus 3.25% under our senior bank facilities.

In February 2004, we further reduced our long-term debt as result of our sale of approximately 34.4 million shares at a public offering price of $6.98 per share, the net proceeds of which were used to redeem $70 million principal amount of our first lien senior secured notes due 2010 and $105 million principal amount of our second lien senior secured notes due 2008 at a redemption price of 112% of the principal amount of such notes plus accrued and unpaid interest to the redemption date. The remaining proceeds will be used for general corporate purposes. In connection with the offering we further amended our senior bank facilities to permit us to use the proceeds of this offering within 270 days of completion to purchase, redeem or retire a portion of our senior subordinated notes due 2009 and our first lien senior secured notes and second lien senior secured notes.

The details of each of these financing events are outlined in the following sections. Also, see Note 7 “Long-Term Debt,” Note 10 “Redeemable Preferred Stock” and Note 11 “Common Stock” of the notes to our audited consolidated financial statements included elsewhere in this report.

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Outlook

Based upon booking trends, backlog levels and estimated turns levels, we anticipate that revenues for the first quarter of 2004 will increase by 5% to 6% as compared to the fourth quarter of 2003. Backlog levels at the beginning of the first quarter of 2004 were higher than backlog levels at the beginning of the fourth quarter of 2003 and represented greater than 90% of our anticipated revenues for the first quarter of 2004. We expect that average selling prices for the first quarter of 2004 will increase as compared to the fourth quarter of 2003 and that our gross margin for the first quarter of 2004 will increase to between 29% and 30%.

Results of Operations

The following table summarizes certain information relating to our operating results that has been derived from our audited consolidated financial statements for the years ended December 31, 2003, 2002 and 2001. The amounts in the following table are in millions, except for percentage changes:

nm    Not meaningful

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Revenues

Revenues were $1,069.1 million, $1,093.7 million and $1,223.2 million in 2003, 2002 and 2001, respectively. The decline from 2001 to 2002 and from 2002 to 2003 were primarily due to declines in average selling prices of approximately 10% and 14% respectively, in each case partially offset by volume and mix changes. As previously described, during 2001 and continuing through the first part of 2003 the decline in average selling prices was due to overcapacity and lower demand in the semiconductor industry. The revenues by product line are as follows (dollars in millions):

Although revenues from our power management and standard analog product line declined from 2001 to 2002 and from 2002 to 2003, revenues in this product line as a percentage of total revenues increased from 2001 to 2002 as a result of our strategic focus of research and development and marketing efforts on the power management market. In 2003, weakness in the automotive sector has contributed to the absolute dollar and percentage declines in this product line.

Revenues from MOS power devices declined from 2001 to 2002 but increased in 2003 to exceed 2001 levels. As a percentage of revenues, this product line grew in each of 2002 and 2003, as compared to the previous year, primarily as a result of revenues from successful new product designs and strength in the computing sector.

Revenues from high frequency clock and data management products declined substantially between 2001 and 2002 due to weakness in the networking sector driven by an excessive supply of routing and networking equipment. In 2003, this sector started to grow again primarily in the automated test equipment market, causing an increase in revenues both in absolute dollars and as a percentage of revenues.

Revenue from standard components declined steadily from 2001 to 2002 and from 2002 to 2003. This product line consists of many products that are available from numerous competitors in the marketplace and is thus heavily influenced by pricing pressures and general market conditions. In addition, we took steps in 2002 to exit non-profitable portions of this business, accounting for a portion of the revenue decline between 2002 and 2003. The revenue declines from 2001 to 2002 and from 2002 to 2003 are also partially attributable to our focus on other product lines during these periods.

Revenues by geographic area as a percentage of revenues were as follows:

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A majority of our end customers, served directly or through distribution channels, are manufacturers of electronic devices. In recent years, there has been a trend toward moving such manufacturing activities to lower cost regions, particularly in Asia. Our shift in revenues by geographic area reflects this trend.

Gross Profit

Our gross profit was $301.0 million, $298.1 million and $225.5 million in 2003, 2002 and 2001, respectively. As a percentage of revenues, our gross margin was 28.2%, 27.3% and 18.4% in 2003, 2002 and 2001, respectively. Although declines in average selling prices had a detrimental impact on our gross margin during 2002 and 2003 and reduced the need for inventory reserves in 2002 and 2003, we were able to offset these effects through cost savings from our restructuring programs and the reduced need for inventory reserves in 2002 and 2003.

Since the fourth quarter of 2000, we have been implementing profitability enhancement programs to improve our cost structure and, as a result, we expect to rank, as compared to our primary competitors, among the lowest in terms of cost structure. As a result of the elements of a program that we started in June 2001 and completed in the fourth quarter of 2002 (the 2000 plan), we achieved approximately $365 million of annualized cost savings of which $255 million related to cost of sales, based on a comparison of our cost structure during the first quarter of 2001 to our cost structure during the third quarter of 2002. As a result of additional cost cutting commenced in the fourth quarter of 2002, which was completed during the fourth quarter of 2003 (the 2002 plan), we believe that we achieved an estimated $114 million of cost savings in 2003, as compared to our cost structure during the third quarter of 2002, and we expect to achieve an estimated $151 million of annual costs savings beginning in 2004 from the 2002 plan. These savings are as a result of our manufacturing rationalization plan, reductions in non-manufacturing personnel and other cost controls. Our manufacturing rationalization plan included movement of our manufacturing operations from high cost regions in North America to lower cost regions in Asia and Central Europe. As a result, approximately 79% of our cost of goods sold in 2003 related to our manufacturing operations outside of North America. More recently, we announced that we intend to phase out our manufacturing operations in East Greenwich, R.I. and our assembly and test operations in the Czech Republic by the end of 2004. As a result of these actions, we expect to achieve modest savings in 2004, as operations transition to other manufacturing facilities. During 2005, we expect cost savings related to these closures to be between $20 million and $25 million, as compared to annualized costs in the third quarter of 2003.

The following table summarizes the annual cost savings from the 2000 plan by type and by the applicable caption contained in our consolidated statement of operations (in millions):

The following table summarizes the estimated annual cost savings from the 2002 plan that we expect following 2003 by type of cost and by the applicable caption contained in our consolidated statement of operations and comprehensive loss (in millions):

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The actions taken to achieve the cost savings described above were centered around the following key initiatives, which we expect to continue to be a focus in 2004:

These plans have included, among other actions, phasing out manufacturing operations at our Guadalajara, Mexico facility and transferring some of the manufacturing activities performed at our Aizu, Japan and Seremban, Malaysia facilities to some of our other facilities or to third party contractors. More recently, we announced that we intend to phase out our manufacturing operations in East Greenwich, R.I. and our assembly and test operations in the Czech Republic by the end of 2004. In many cases, the volume from closed operations has been or is being shifted to our existing facilities in order to improve capacity utilization and take advantage of economies of scale. Facilities closures and production shifts have resulted in some reductions in our manufacturing capacity, but we do not expect these reductions to affect our ability to meet our foreseeable production needs.

Operating Expenses

Research and development expenses were $85.5 million, $81.5 million and $94.5 million, representing 8.0%, 7.5% and 7.7% of revenues in 2003, 2002 and 2001, respectively. The primary emphasis of our new product development efforts has been, and continues to be, in the expected high growth market applications of power management and high frequency clock and data management solutions, with over 70% of our overall research and development investments focused in these areas.

Selling and marketing expenses were $63.0 million, $61.2 million and $74.8 million, representing 5.9%, 5.6% and 6.1% of revenues in 2003, 2002 and 2001, respectively. Restructuring efforts in selling and marketing, including the downsizing of our sales force, closing of sales offices as well as our regional sales headquarters and centralizing and relocating our order entry functions to lower cost regions, were largely enacted by the middle of 2001. Internal sales and marketing personnel and field application engineers as well as external sales representatives promote our products. We plan to make investments in our sales and marketing systems to identify new customers as well as to expand our penetration of existing customers in selected product areas.

General and administrative expenses were $64.9 million, $88.8 million and $115.5 million, representing 6.1%, 8.1% and 9.4% of revenues in 2003, 2002 and 2001, respectively. Personnel reductions of approximately 30% and the relocation of functions to lower cost regions accounted for the majority of the decrease between 2001 and 2002. Savings from these efforts, as well as continued personnel reductions and functional relocations, accounted for the further decrease between 2002 and 2003. Based on our revenue estimates for 2004 and the fact that most of our cost savings in this area have been realized, we expect that any further decreases in general and administrative expenses would be modest and would be primarily attributable to our transition to new information technology platforms.

Amortization of goodwill and other intangibles was $5.9 million, $11.9 million, and $22.6 million in 2003, 2002 and 2001, respectively. As a result of the adoption of SFAS No. 142 effective January 1, 2002, we eliminated the amortization of goodwill (see Note 3 “Significant Accounting Policies” of the notes to our audited consolidated financial statements included elsewhere in this report. As discussed in further detail below, amortization of our developed technology intangible asset ceased following the second quarter of 2003 when we wrote-off the remaining balance acquired in connection with our acquisition of Cherry Semiconductor in April 2000.

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Other Operating Expenses — Restructuring, Asset Impairments and Other

Restructuring, asset impairments and other charges were $61.2 million, $27.7 million and $150.4 million in 2003, 2002 and 2001, respectively. Our individual quarterly restructuring charges are summarized below; however, for more information see Note 5 “Restructuring, Asset Impairments and Other, net” of the notes to our audited consolidated financial statements included elsewhere in this report.

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Interest Expense

Interest expense was $151.1 million, $152.5 million and $143.6 million in 2003, 2002 and 2001, respectively. The increase between 2001 and 2002 was attributable to the increased supplemental interest charges resulting from our August 2001 amendments to our senior bank facilities, and a full year of interest on the draw on our revolving credit facility that occurred in June 2001. This supplemental interest ceased to accrue at the end of March 2003; however, the resulting interest savings was offset by our refinancing of portions of our senior bank facilities with higher interest rate bearing notes. See “Liquidity and Capital Resources — “Financing” for a description of our refinancing activities. Our weighted-average interest rate on long-term debt (including current maturities) was 10.8%, 10.5% and 10.3% per annum in 2003, 2002 and 2001, respectively.

Loss on Debt Prepayment

Loss on debt prepayment totaled $7.7 million and $6.5 million in 2003 and 2002, respectively, representing the write-off of debt issuance costs and certain third-party costs incurred with respect to debt refinancings that occurred during those periods. See “Liquidity and Capital Resources — Financing” for a description of our refinancing activities. In the first quarter of 2004, we expect to incur an additional $33.0 million loss on debt prepayment associated with the repayment of a portion of our first lien senior secured notes due 2010 and second lien senior secured notes due 2008 in connection with our February 2004 equity offering.

Provision for Income Taxes

Provision for income taxes was $7.7 million, $9.5 million and $345.8 million in 2003, 2002 and 2001, respectively. The 2003 and 2002 provisions related to income and withholding taxes of certain of our foreign operations. The 2001 amount was greatly influenced by our decision to reserve the deferred tax benefits relating to our domestic net operating losses to the amount that could be recovered via carry-back. This decision resulted in an increase of $366.8 million in our valuation allowance that was partially offset by deferred tax benefits recognized for certain operating losses incurred outside the United States.

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Liquidity and Capital Resources

This section includes a discussion and analysis of our cash requirements, our sources and uses of cash, our debt and debt covenants, and our management of cash.

Cash Requirements

Commercial Commitments, Contractual Obligations and Indemnities

Our principal outstanding contractual obligations relate to our senior bank facilities, other long-term debt, operating leases, purchase obligations, pension obligations and our redeemable preferred stock. The following table summarizes our contractual obligations at December 31, 2003 and the effect such obligations are expected to have on our liquidity and cash flow in the future: