1, KB base material 2, Lead free HASL, 35um,2-layers ... with blind/buried via holesMain base material:FR-1, FR-2, FR-4, CEM-1, CEM-3, High Frequency Laminate with various ... /tin, plating gold, OSPBoard Thickness:Inner core thickness 0.15-1.5mm, finished board thickness 0.20-3mmCopper Foil Thickness:1/3 OZ–6 OZ (18um ... are looking forward to your inquiry!OUR PARTNERS: Double side 1.0mm HASL PCB