... manufacturers, Rigao Electronics is a professional shenzhen rigid pcb, 4 layer rigid pcb production supplier and factory, we can ... .Detailed Specification of PCB Manufacturing 1Layer1-30 layer2MaterialFR-4,CEM-3,Hight TG,FR4 Halogen Free,FR-2,Aluminum3Board ... plating,Enepig, G/F Plating, carbon9Copper thickness0.5-4.0oz10Solder mask colorGreen/black/white/red/blue/yellow11Inner packingVacuum ...