This is a sample PCB, four layers, manufactured by advanced equipment introduced from Japan,Germany ... 's requirement.Our company produce single side PCB,double sided pcb ,4 layer PCB,and other multilayer PCB. Major PCB Indexes below can all be customised:1 ... technique: Tin soldering, plating gold, immersion gold,OSP We do PCB biz on ODM or OEM basis and our products are ...