... .75%13Insulation Resistance>1012 Ω Normal14Electric strength>1.3kv/mm15S/M abrasion>6H16Thermal stress288°C 10Sec17Test Voltage50-300V18Min. blind/buried via0.15mm ... , Plating gold20MaterialsFR4,H-TG,Teflon,Rogers,Ceramics,Aluminium, Copper base China Supplier of PCB Board