Our PCB technical specifications: - base material: fr4, aluminum, ceramic, rogers, f4bk, f4bt, tp, pf, cem-1, cem-3, etc. - board thickness: 0.30 to 3.20mm (12 to 126mil) - copper thickness: 0.50 to 5 ounce - solder mask: lpi solder mask, conventional solder mask, peelable solder mask, uv solder mask - minimum line width: 0.075mm (3mil) - minimum line space: 0.075mm (3mil) - minimum hole diameter: 0.10mm (4mil) - pth hole diameter tolerance: +/-0.076mm (+/-3mil) - npth hole diameter tolerance: +/-0.03mm (+/-1.2mil) - maximum board size: 460 x 620mm (18 x 24) - board finishing type: hot air leveling, soft gold, hard gold, immersion gold, gold fingers.