Shenzhen Hejin Circuit Co., Ltd. is a leading MCPCB manufacturer and exporter in China. Shenzhen Hejin Circuit Co., Ltd. is a high-tech enterprise, engaged in research and development, production and sale, specialized in high thermal conductivity aluminum pcb, copper pcb (thermoelectric separation), copper-aluminum pcb, iron pcb,COB mirror pcb, rigid-flex pcb and double & multilayer FR4 PCBs with SMT assembly.Hejin Circuit was established in Shenzhen of China on August 2008, covers about 5000 square meters, with more than 360 people, the monthly production capacity can be up to 15000 square meters. All the products have wholly passed through the test of European Union “SGS-ROHS” and “SGS-REACH”. Also company has got ISO9001:2000 Quality Management System Authentification, RoHS Environment Management System Authentification and UL certification, UL number is E365537. Company special products: Hejin circuit is dedicated to research and develop all kinds of high-precision and high-thermal conductivity aluminum pcb and copper pcb (copper-aluminum plates, iron substrates, COB aluminum plates). Adoptting thermoelectric separation structure in the technology process, which can deal with the problem of heat dissipation for high-power LED light ball better, and improve the heat transfer for high-power LED lighting products between 100w and 1000w especially. Our products are widely used in LED lighting, high-power power source, automotive, electronics, machinery, telecommunications and other fields with cooling demand. http://www.hjmcpcb.com