... finish Immersion Gold 3.Line/Space 4/4mil 4.PCB Board Surface processing typeHASL/ plating gold /immersion gold/ ... processing/immersion Tin /immersion silerLayerssingle-sided,double-sided,multilayer pcb boardMin trace width6milMin space width3milMin trace to pad/pad ... testing,high pressure testingPower Various types base material to PCB processingHigh TG board, high frequency board(ROGERS,TEFLON) ...