4 Layer rigid PCB 1.4 Layer rigid PCB 2.Layer:1-35, 3.good quality and reasonable price 3.UL,ISO9001,ISO14001,TS16949,CE,. 4 Layer rigid PCB 4 Layer rigid PCB4 Layer rigid PCB ... 3.The information about our's pcb Capability 1layer1-35 layer2MaterialFR-4,CEM-1,CEM-3,Hight TG, ... Inmersion Silver/Gold,Osp,Gold Plating9Copper thickness0.5-4.0oz10Solder mask colorgreen/black/white/red/blue/yellow11Inner ...