Taiwan-Asia Semiconductor Corporation engages in the manufacture and sale of semiconductor components in Taiwan and internationally. The company offers sensing devices, such as photodiode, phototransistor, and phototriac; power devices, including power MOSFET, TVS diode, zener diode, and resistor; and general and high brightness LED, and VCSEL. It engages in researches, develops, designs, manufactures, and sells system products. The company's products are used in consumer and wearable, industry, automotive, home appliance, security, display, and lighting applications. The company was formerly known as Opto Tech Corporation. Taiwan-Asia Semiconductor Corporation was founded in 1983 and is headquartered in Hsinchu City, Taiwan.