... Thickness 1.6mm3. Competitive price with good quality4. optical pickup head FPC board5. Certificate: ROHS, UL, ISO9001-2000, ISO14001Our Manufacturing ... Polyimide (PI), polyester (PET), FR4 layerSingle-layer, double-layer, multi-layerCopper thickness12um, 18um, 35um, 70umWorking panel size400mm*610mmsurface finishOSP/ immersion ... , laser appearance 6 Layer FR4 and PI optical pickup head fpc board