... PCB Specification providing OEM service to all sorts of printed circuit board assembly 1 Layer 1-30 layer 2 Material ... 4,CEM-1,CEM-3,Hight TG,FR4 Halogen Free,FR-1,FR-2 3 Board thickness 0.2mm ... 0.075mm(3mil) 8 Surface finish/treatment HALS/HALS lead free,Chemical tin,Chemical Gold,Immersion gold Inmersion Silver/Gold ... 15 profiling punching Routing,V-CUT,Beveling printed circuit board pcb board factory