... quality and consistency PCB process capability:1.Layer: 2-22 layer2.Product type: Rigid PCB,High Density Inverter PCB,thick copper ... Hole Diameter: 0.1mm8.Outer layer line width / spacing: 0.1mm/0.1mm9.Inner layer line width / spacing: 0 ... .Surface coating: Lead Free HAL, HAL, Flash Gold, Immersion Gold, Immersion Tin, Immersion Silver, OSP, Gold Finger Plating, Carbon Ink Printing, Peelable Blue Mask ...