FR4 PCB ,4mm thickness PCB, 12 layers PCB 1) Thickness:0.1mm-5mm 2) Minimum linewidth:0.075mm/3mil 3) Minimum gap:0.065/2.8mil 4) Minimum aperture inradium:0.15mm 5) Minimum aperture external diameter:0.45mm 6) Minimum BGA:0.2mm 7) Layer 24 layers through hole non-impedance