Phoenix Silicon International Corp. engages in the research and development, manufacture, and sale of semiconductor wafer process system and lithium batteries. The company operates through two segments: Semiconductor and Energy. The Semiconductor segment offers wafer reclaim, wafer thinning, thermal oxide, micro electrical-mechanical system wafer thinning and mild-end process service, and through-chip via wafers and interposers. The Energy segment provides solar energy storage system, uninterruptible power supply, power system, and energy storage lithium batteries. The company was founded on March 3, 1997 and is headquartered in Hsinchu, Taiwan.