Alpha & Omega Semiconductor Ltd. designs, develops and supplies power semiconductor products. Its products include analog switches, insulated-gate bipolar transistors, metal-oxide-semiconductor field-effect transistors, power integrated circuits, and transient voltage suppressors. It operates through the following geographical segments: Hong Kong, China, South Korea, United States, and Other Countries. The company was founded by Mike F. Chang, Yueh-Se Ho, Anup Bhalla, and Sik Kwong Lui on September 27, 2000 and is headquartered in Sunnyvale, CA.