... —18L, HDI20-28 , HDI MaterialCEM-1,CEM-3,FR-4, High TG FR-4 , Halogen-free FR-4 , aluminium ,Ceramic(96% Alumina) Teflon,PTFE(F4B ... .05mmMini hole ring (single 0.075MM0.05MMOuterLayer Copper Thickness 17um--175um175um--210umInnerLayer Copper Thickness 130mm-210mm (High TG)130mm-210mm( ... maskbluecopper1ozboard thickness1.6mmfinishingOSPmin trace0.1mmmin space0.1mmcertificateUL, ISO, RoHS FR-4 PCB board