Shenzhen Q&D Circuits Co., Ltd. engages in the research and development, production, and sale of Printed Circuit Boards (PCB) and Printed Circuit Board Assembly (PCBA) related products. It offers prototypes, small-batch boards, and large-batch boards, and by the number of layers into single/double-sided boards, and multilayer boards; high-multilayer boards, high-frequency boards, high-speed boards, HDI boards, thick copper boards, rigid-flex boards, semiconductor test boards, and millimeter-wave radar boards. It serves communication, industrial control, consumer electronics, automotive electronics, medical and healthcare, and semiconductors. The company was founded in 2004 and is headquartered in Shenzhen, China with additional offices across China.