The specification of our PCB: Layer number: 1-12 Type of dielectrict material: 94hb, 94v0, CEM-1, CEM-3, FR-4 Boardthickness: 0.2mm-5.0mm(8mil-200mil) PTH hole copper thickness: 0.5 oz min-3 oz max Process size: 2mm-2m Line width/ space (min): 0.1mm (4mil) Min drilling diameter: 0.25mm (10mil) Min Punch diameter: 0.9mm (3mil)