PCB Specification detail. Item Specification 1 Numbr of Layer 1-38Layers 2 Material FR-4,FR2.Taconic,Rogers, CEM-1 CEM-3,ceramic , crockery Metal-backed Laminate 3 Finish Board Thickness 0.2mm-6.00 mm(8mil-126mil) 4 Minimun Core Thickness 0.075mm(3mil) 5 Copper Thickness 1/2 oz min;12 oz max 6 Min.Trace Width & Line Spacing 0.075mm/0.1mm(3mil/4mil) 7 Min.Hole Diameter for CNC Driling 0.1mm(4mil) 8 Min.Hole Diameter for punching 0.9mm(35mil) 9 Biggest panel size 610mm*508mm 10 Hole Positon +/-0.075mm(3mil) CNC Driling 11 Conductor Width(W) 0.05mm(2mil)or;+/-20% of original artwork 12 Hole Diameter(H) PTH L:+/-0.075mm(3mil);Non-PTH L:+/-0.05mm(2mil) 13 Outline Tolerance 0.125mm(5mil) CNC Routing;+/-0.15mm(6mil) by Punching 14 Warp & Twist 0.70% 15 Insulation Resistance 10Kohm-20Mohm 16 Conductivity <50ohm 17 Test Voltage 10-300V 18 Panel Size 110×100mm(min);660×600mm(max) 19 Layer-layer misregistration 4 layers:0.15mm(6mil)max;6 layers:0.25mm(10mil)max 20 Min.spacing between hole edge to circuity pqttern of an inner layer 0.25mm(10mil) 21 Min.spacing between board oulineto circuitry pattern of an inner layer 0.25mm(10mil) 22 Board thickness tolerance 4 layers:+/-0.13mm(5mil);6 layers:+/-0.15mm(6mil) 23 Impedance Control +/-10% 24 Different Impendance +-/10%