... ; 5, High quality, low cost&fast delivery. Welcome To Rigao PI FPC,flex PCB,keypad fpc --Good quality material and color ... nickel immersion gold,Immersion Tin, OSP(Entek)Base Material:Polyimide(Kapton), Polyester(PET), Aluminium, FR4Copper Foil:ED/RAMin. Line Width:2 ... Test:100% electrical and electricity performance testView of Rigao Factory : PI FPC,flex PCB,keypad fpc