... Produce PCB and FPC board 4. UL, RoHS, SGS High Quality PCB Manufacturing Shenzhen Yuzhixiang Electronics Co., Ltd, also named ... Materials (RoHS Compliant) , CEM-3, CEM-1, Aluminium, High frequency Material (Rogers, Teflon, Taconic)Layer No.1 - 30 ... SGS ULSpecial requirementsBuried and blind vias, Impedance control, via plug, BGA soldering and gold fingerCircuit board Workshop Our cooperative ...