... than 120,000 square meter per month, double side PCB, multi-layer PCB and the high density boards of above 5,000 ... gold Inmersion Silver/Gold,Osp,Gold Plating9Copper thickness0.5-4.0oz10Solder mask colorgreen/black/white/red/blue/yellow11Inner packingVacuum ... & D team through the unremitting efforts, now has a manufacturing multilayer blind, buried hole circuit boards, flexible circuit board (FPC), ...