ON SEMICONDUCTOR CORP

Raw Materials

Our manufacturing processes use many raw materials, including silicon wafers, SiC wafers, laminate substrates, gold, copper, lead frames, mold compound, ceramic packages and various chemicals and gases. We seek to obtain our raw materials and supplies in a timely, planned manner from our suppliers to allow for our manufacturing cycle to align with the timing of our customer demands. However, suppliers may extend lead times, limit supplies or increase prices due to capacity constraints or other factors beyond our control.

Manufacturing and Design Operations

We currently have domestic design operations in Arizona, California, Idaho, New York, Oregon, Pennsylvania, Rhode Island and Texas. We also have foreign design operations in Belgium, Canada, China, the Czech Republic, Germany, India, Ireland, Israel, Italy, Japan, South Korea, the Philippines, Romania, Singapore, the Slovak Republic, Slovenia, Switzerland, Taiwan and the United Kingdom. We operate front-end wafer fabrication facilities in the United States, the Czech Republic, Japan, South Korea, and Malaysia and back-end assembly and test site facilities in Canada, China, Malaysia, the Philippines, Vietnam and the United States. In addition to these front-end and back-end manufacturing operations, our facility in Hudson, New Hampshire manufactures SiC crystal boules and our facilities in Rožnov pod Radhoštěm, the Czech Republic and Bucheon, South Korea manufacture silicon and SiC wafers that are used by a number of our facilities.

The table below sets forth information with respect to the manufacturing facilities we operate either directly or pursuant to joint ventures, the reportable segments that use such facilities, and the approximate gross square footage of each site's building, which includes, among other things, manufacturing, laboratory, warehousing, office, utility, support and unused areas.

(1)These facilities are leased.

(2)This facility is used for both front-end and back-end operations.

(3)These facilities are located on leased land.

All of our manufacturing facilities are fully owned and operated by us, except our assembly and test operations facility located in Leshan, China, which is owned by Leshan-Phoenix Semiconductor Company Limited, a joint venture company in which we own 80% of the outstanding equity interests ("Leshan"). The financial and operating results of Leshan have been consolidated in our financial statements. Our joint venture partner is Leshan Radio Company Ltd. ("Leshan Radio"). Pursuant to the joint venture agreement between us and Leshan Radio, 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, provided that any 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 purchased 80% of Leshan's production capacity in each of 2025, 2024 and 2023, and are currently committed to purchase approximately 80% of Leshan's expected production capacity in 2026.

We use third-party contractors for some of our manufacturing activities, primarily for wafer fabrication and the assembly and testing of finished goods. Our agreements with these manufacturers typically require us to forecast product needs and commit to purchase services consistent with these forecasts. In some cases, longer-term commitments are required in the early stages of the relationship. These manufacturers collectively accounted for approximately 34% of our total manufacturing input costs in 2025, 33% in 2024 and 36% in 2023.

For information regarding risks associated with our foreign operations, see "Risk Factors — Trends, Risks and Uncertainties Related to Our Business" included elsewhere in this Form 10-K.

Patents, Trademarks, Copyrights and Other Intellectual Property Rights

We market our products under worldwide trademarks, including ON Semiconductor, ON, onsemi, and various product names and logos, and, in the United States and internationally, we rely primarily on a combination of patents, trademarks, copyrights, trade secrets, employee and non-disclosure agreements and licensing agreements to protect our IP. We hold a substantial number of issued and pending patents worldwide and continue to prosecute applications in areas that are material to our business. We do not consider our business substantially dependent on any single onsemi patent. Our policy is to protect our products and processes by asserting our IP rights where appropriate and prudent and by obtaining patents, copyrights and other IP rights used in connection with our business when practicable and appropriate. Over the last five years, we have strategically rationalized our patent portfolio to focus on higher-value inventions aligned to our core technologies and products as our business strategy has evolved. We believe the scope and duration of our IP rights, including trade-secrets and technical know-how, are adequate to protect our products and processes.

For information regarding risks associated with intellectual property, see "Risk Factors — Trends, Risks and Uncertainties Related to Intellectual Property" included elsewhere in this Form 10-K.