... ,ISO,SGS,Layer:2-20 2.8 years experience in PCB 3.Drill Size:0.1mm,Line:3mil Immersion gold circuit ... pcb, pcba & fpc , multilayer pcb, pcb usb pcbOur Factory Manufacture Capability ItemManufacture CapabilityMaterialFR-4 ... ±10%Cooper thickness0.5 OZ-6OZ (18 um-210 um)Copper Plating Hole18-40 umImpedance Control±10%Warp &Twist0.50%Peelable0 ...