... 3. Produce PCB and FPC board 4. UL, RoHS, SGS Double Sided PCB For OEM ServiceShenzhen Yuzhixiang Electronics Co., Ltd, also named ... -4, Lead free Materials (RoHS Compliant) , CEM-3, CEM-1, Aluminium, High frequency Material (Rogers, Teflon, Taconic)Layer No.1 - 30 ...