halogen free pcb 1.UL,ROHS,ISO,SGS ... gold circuit pcb, pcba & fpc , multilayer pcb, halogen free pcbOur Factory Manufacture Capability ItemManufacture CapabilityMaterialFR-4 / Hi Tg ... FR-4 / Lead free Materials (RoHS Compliant) /CEM-3, Aluminum, Metal ... : ±0.05mmHole Position Tol±0.075mmPlatingHASL2.5umLead free HASL2.5umImmersion GoldNickel 3-7um Au:1-5u ...