... delivery 4, strictly QC control PCB Specificationproviding OEM service to all sorts of printed circuit board assembly1Layer1-30 layer2MaterialFR-4 ... /treatmentHALS/HALS lead free,Chemical tin,Chemical Gold,Immersion gold Inmersion Silver/Gold,Osp,Gold Plating9Copper thickness0.5oz Min.,5.0oz Max10Solder ... ISO9001,ISO14001,ROHS,CQC,SGS15profiling punchingRouting,V-CUT,Beveling gold plated fpc pcb board