Production technology of PCB HS code 85340010 Material FR-4, CEM-3,PTEE Teflon Outer size Maximum 457mmx610mm Thickness 0.016--0.125 (0.4--3.2mm, 1.0mm, 1.2mm,1.6mm, 2.0mm are normal ones) Layers 2--12 (2,4,6,8 are normal) and 1--6 layers for flexible board Line width 6mil 0.15mm) Line distance 6mil 0.15mm) Minimum drill 0.25mm Copper thickness 18mil, 36mil, 72mil Copper thickness of hole 0.6mil---2mil Legend thickness 0.15mm (6mil) Tin thickness 0.04mil---1.2mil Moulding type milling machine, punch, cut out, V-cut bevel edge Surface technics spurt tin, gilt, plating nickel, spurt rosin, resist oxidation (OSP), HAI Surface coat black, green, brown, red, yellow Solder mask UV, photoresist aspect ratio 6:1 Surface evenness 1% inspection Flying probe tester inspection International UL safety standard, UL number: E216635 Tolerance ? 0.0127mm (5mil) ROHS All PCBs meet ROHS directive