... reasonable price 3.UL,ISO9001,ISO14001,TS16949,CE,. 4 Layer rigid PCB 4 Layer rigid PCB4 Layer rigid PCB 1.Our ... Halogen Free,FR-1,FR-23Board thickness0.2mm-7mm4Max.finished board side500mm*500mm5Min.drilled hole size0.25mm6min.line width4mil7min.line ... gold Inmersion Silver/Gold,Osp,Gold Plating9Copper thickness0.5-4.0oz10Solder mask colorgreen/black/white/red/blue/yellow11Inner packingVacuum ...