... Specification providing OEM service to all sorts of printed circuit board assembly 1 Layer 1-30 layer 2 Material FR-4,CEM-1,CEM ... 0.075mm(3mil) 7 Min.line spaceing 0.075mm(3mil) 8 Surface finish/treatment HALS/HALS lead free,Chemical tin,Chemical ... ,ROHS,CQC,SGS 15 profiling punching Routing,V-CUT,Beveling printed circuit board pcb board factory