... Certificate: ROHS, UL, ISO9001-2000, ISO14001Our Manufacturing Capability for PCB BoardMaterial type: Ployimide ( PI ), Ployester (PET), FR4Surface ... material Polyimide (PI), polyester (PET), FR4 layerSingle-layer, double-layer, multi-layerCopper thickness12um, 18um, 35um, 70umWorking panel ... (2mil)External treatmentrouting, punching, laser appearance 6 Layer FR4 and PI optical pickup head fpc board