1.Layer:2 layer,Size:50*80mm,2 layer Rigid PCB 2.UL,Rohs Certificate 3 ... tinThickness:32+/-4mil1.Detailed Specification of PCB Manufacturing 1) Layer:1-30 layer 2) Material:FR-4,CEM ... printed circuit board assembly 2.Detailed Terms for Pcb Assembly Technical requirement:1) Professional Surface-mounting ... Test),FCT(Functional Circuit Test) technology.4) PCB Assembly With UL,CE,FCC,Rohs Approval5) Nitrogen ...