RFsemi Technologies, Inc. engages in the manufacture and sale of semiconductor devices and in provision of semiconductor total solutions. It operates through following business divisions: Semiconductor and Light Emitting Diode (LED) Lighting. Its products include electret capacitor microphone chips, transient voltage suppressor diode, driver integrated circuit, LED module, and LED lighting. The company was founded on October 22, 1999 and is headquartered in Daejeon, South Korea.