Shenzhen SI Semiconductors Co., Ltd. (SI SEMI)was founded in December 1987, specializing in fabrication of semiconductor devices, mainly chips and devices of power transistors.We own and operate 4 & 5 semiconductor wafers & devices production lines. The products of SISEMI fall in to the main categories: Bipolar Power Transistors, MOSFET, Schottky Diodes, Variable Capacitance Diode ect. The Power Transistors made in SISEMI are widely used in Electronic Ballasts, Electronic Transformers, Switch Power Supplies and charger ect.. With giving important contribution to Chinese green illumination, SISEMI has become a famous supplier of silicon power transistors for green illumination application in China.