Shenzhen Qingyi Photomask Ltd. engages in the research, development, design, production and sales of photomask. Its products include quartz photomask and soda photomask, which are used in flat panel displays, semiconductor chips, touch panel and circuit board industries. The company was founded by Hsiang Chien Tang on August 25, 1997 and is headquartered in Shenzhen, China.