Vanguard International Semiconductor (VIS, 世界先進積體電路股份有限公司) is a specialty IC foundry service provider. It specializes in bipolar-CMOS-DMOS (BCD), ultra high voltage (UHV), and silicon-on-insulator (SOI), discrete products, high voltage (HV) process technologies, technologies for optical, magnetic, and thermal sensors, etc. The company offers mask, design, backend, automotive, and other services.