pcb usb pcb 1.UL,ROHS,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 / Hi Tg FR-4 / Lead free Materials (RoHS Compliant) /CEM-3, Aluminum, Metal basedLayer No.1-- 20Finished Board thickness0.2 mm-4.0mm’(8 mil-160 mil)Board ...