United Microelectronics Corp. is principally engaged in the manufacturing of semiconductor products. The Company operates its businesses primarily through wafer production services. The Company provides the customer-tailored design, testing and production of silicon intellectual property (IP) products, embedded integrated circuits (ICs), masks and wafers. The Company offers complementary metal-oxide semiconductor (CMOS) logics, mixed signals, radio frequency (RF) CMOS, embedded memory products, high voltage and CMOS image sensors. The Company distributes its products primarily in North America, Asia and Europe.