Episil Technologies Inc. is primarily involved in the research, development, production, and worldwide sales of advanced semiconductor products, including epitaxial wafers, silicon wafers, mixed-signal integrated circuits, and linear integrated circuits. The company conducts business in key markets such as Taiwan, Japan, China, and the United States, as well as other international regions. Established in 1985 and headquartered in Hsinchu City, Taiwan, the firm was formerly recognized as Episil Holding Inc.