... finish Immersion Gold 3.Line/Space 4/4mil 4.PCB Board Surface processing typeHASL/ plating gold /immersion gold/ Ni ... Various types base material to PCB processingHigh TG board, high frequency board(ROGERS,TEFLON) halogen-free board (FR-4,CEM-1, ... CEM-3)Other testing requestImpendence testing, Hole resistance testing, gold slice up, Solder ability. Electronic Multilayer PCB Board ...