Keystone Technology Co., Ltd. engages in the research and development, production, and sale of semiconductor display devices and special adhesive materials. The semiconductor display devices include polarizers, functional devices, signal connectors, liquid crystal panels, production auxiliary consumables, and optically clear adhesive. The special adhesive materials comprises tape, buckle, foam, protective film, and label. The company was founded on January 18, 2002 and is headquartered in Nanjing, China.