SG Micro Corp
300661
Shanghai Cooltech Power
300153
Shenzhen Qingyi Photomask
688138
YD Electronic Technology
301123
Hunan Sundy Science And Technology
300515
The company was founded in 1988 and successfully listed on the Shenzhen Stock Exchange in 2007. In 2020, Zhonghuan Electronics Group, the controlling shareholder of the company, was restructured into a wholly-owned subsidiary of TCL Technology, and TCL Technology became the company's indirect controlling shareholder. The company is mainly engaged in the R&D, production and sales of printed circuit boards (PCBs). The company's product types cover single and double panels, multi-layer boards, high-multi-layer boards, HDI, high-frequency high-speed boards, and thick copper plates.