... 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 basedLayer No ... ;NPTH: ±0.05mmHole Position Tol±0.075mmPlatingHASL2.5umLead free HASL2.5umImmersion GoldNickel 3-7um Au:1-5u''OSP0 ...