1, KB(FR-4) ,ROHS UL 94V-0 2, Board thickness:1.6mm,Cu: 35um, 3.ISO9001:200,IPC standard ... MLB with blind/buried via holesMain base material:FR-1, FR-2, FR-4, CEM-1, CEM-3, High Frequency Laminate with various ... gold, OSPBoard Thickness:Inner core thickness 0.15-1.5mm, finished board thickness 0.20-3mmCopper Foil Thickness ... are looking forward to your inquiry!OUR PARTNERS: FR-4 single side 1 layer pcb