... development - testing –sample making - mass production - technical servicesHigh-quality supply channels and partnerson plastic parts, mold shell ,metal processing ... provided by customers * PCB board made, circuit board parts purchased by us * PCB board with parts assembled * Electronic ... Immersion Gold,Immersion Tin,Immersion Silver,OSP,etc.Board Thickness Tolerance±10%Copper Weight Tolerance± 0.25 ...