... and FPC board 4. UL, RoHS, SGS High Quality PCB Manufacturing Shenzhen Yuzhixiang Electronics Co., Ltd, ... -6 layers of FPC production. Our business range covers from PCB & PCBA design and copy ... RoHS Compliant) , CEM-3, CEM-1, Aluminium, High frequency Material (Rogers, Teflon, Taconic)Layer No.1 ... 2mm) Board Thickness Tolerance±10%Copper thickness0.5OZ - 4OZImpedance Control±10%Warpage0.075%-1.5% ...