Siliconware Precision Industries Co Ltd was incorporated on May 17, 1984. It provides services in Taiwan through its facilities located in Taichung, Hsinchu and Changhua. It is an independent provider of semiconductor packaging and testing services. The Company offers packaging and testing solutions, including advanced substrate packages such as the flip-chip ball grid array and lead-frame packages, together with lead-frame packages, and testing services for logic and mixed signal devices. The Company also offers its customers turnkey service, from packaging and testing to shipment service. The Company offers package formats designed to provide its customers with a full array of packaging solutions. The packaging solutions it is currently offering to its customers include substrate packages, which include ball grid array and system in packages (incorporating multiple semiconductor chips) and flip-chip ball grid array packages, together with lead-frame packages. Semiconductor testing measures and ensures the performance, functionality and reliability of a packaged semiconductor device. The Company currently has a number of customers worldwide, and its customers include many of the semiconductor companies in the world. The Company's quality control procedures include statistical process control, which involves sampling tests to control and monitor the production process. As of December 31, 2012, it held 383 Taiwan patents, 358 U.S. patents and 95 P.R.C. patents related to various semiconductor packaging technologies, including patents for improvements of thermal and electrical performance used in the semiconductor packaging process. The Company has registered trademark as SPIL in Taiwan. It faces competition from established packaging and testing service providers, including companies with greater manufacturing, financial and other resources. These companies include Advanced Semiconductor Engineering, Inc. (Taiwan), Amkor Technology Inc. (USA) and STATS ChipPAC Ltd. (Singapore).