... , SMT PCB, Electronic PCB,PCB copy, Stencil making, Supplier for PCB/PCBA/FPC, multilayer PCB KBT PCB Board Specification ... Dia0.2mmPTH copper thickness0.4-2mil(10-50um)Tolerance of Eteching±1mil(±25um)V-cut angle25°,30°,45°,60 ... °Pearl Strength of line≥6lb/in(≥107g/mm)Impedance contral and tolerance50 ... /Cam350 Double layers PCB with components, PCB Assembly,Supplier of PCBA