Virginia Semiconductor is a leading manufacturer of prime silicon substrates. SOI substrates are the fastest-growing VSI product; VSI offers 100mm, 150mm, 25.4mm, 50.8mm, and 76.2mm diameter SOI manufactured by silicon wafer bonding. Crystal growth, grinding, slicing, lapping, polishing, oxidation, and SOI are all in-house manufacturing activities being achieved at its Fredericksburg, Va., facility. VSI is a privately held business founded in 1978 by Dr. Thomas G. Digges Jr. After 25 years of manufacturing, the company has a very strong technical base ready to serve customer needs. VSI is ISO 9001 and Better Business Bureau certified. With more than 15 United States Patents and U.S. Trademarks, as well as numerous technical and business awards, VSI continues to build technology for the customer s future needs.