Halogen free pcb Base material: fr4, fr1, fr2, ceramics, aluminum, rogers, f4b, f4bk, f4bt, tp, pf, cem-1, cem-3, etc. Board thickness: 0.30 to 3.20mm (12 to 26mil) Copper thickness: 0.50 to 5 ounce Solder mask: lpi solder mask, conventional solder mask, peelable solder mask, uv solder mask Minimum line width: 0.1mm (4mil) Minimum line space: 0.1mm (4mil) Minimum hole diameter: 0.25mm (10mil) 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 Vacuum packing in carton