SHENZHEN SI SEMICONDUCTORS CO., LTD., (SISEMI) founded in 1988 as one of hi-tech projects of SHENZHEN,CHINA. As a professional power semiconductor devices manufacturer, SISEMI owns the production lines which include both semiconductor wafers and semiconductor devices packaged in TO-92;TO-126;TO-220;TO-3P ect. We are the only one manufacturer of semiconductor wafers in Shenzhen. The 4"wafer fabrication production line of SISEMI has put into use in 1997. We have built a new 5" POWER IC wafer fab. and put into service in 2004. Now the productivity of 4" & 5"silicon wafers which are used in energy-saving lamps lay a leading position in china. The products of SISEMI fall in to the main categories: Bipolar Power Transistors, MOSFET, Schottky Diodes;Variable Capacitance Diode and SCR. We have our own IPs for all products that we fabricated. The Power Transistors made in SISEMI are widely used in Electronic Ballasts, Electronic Transformers, Switch Power Supplies, Monitors xxxxx The produce and sale of MJE13000 series and the BUL6800 series used in energy-saving lamps lay a leading position in china. With giving important contribution to Chinese green illumination, SISEMI has become the important base for power semiconductor devices in China. We strictly adopt ISO9001 standards of QUALITY MANAGEMENT AND QUALITY CONTROL. With powerful technology and advanced equipment, adopted the special process, The reliability & electric characteristics of the devices made in SISEMI is excellent. SISEMI has become a famous supplier of silicon power transistors for green illumination application in China. In view of the trend in semiconductor market at home and abroad, SISEMI has expand its business. We have built a new 5" POWER IC wafer fab and put into service. The new 5" wafer fab will be 0.35-0.80um process, specialized in power MOSFET, IGBT, smart power IC. SISEMI HOPES to cooperate with all those who are far-sighted and interested in Chinese semiconductors market.