... surface finish: HAL, Flash gold, Immersion gold ·Colorful solder mask PCB ·PCB Bwith Bridge Connecting ·RoHSOur PCB fabrication ... 0.075mm8.Copper Thickness:17µm-175µm9.Mini Solder Mask Bridge:0.025mm10.Impedance Control Tolerance:l.± ... tin,Immersion Silver,Plated gold,OSP,Carbon ink.12.Solder Mask Color:Green,Red,White,Yellow,Black,Blue. ... .Certificate:UL,ISO9001:2000,ISO14001,SGS,ROHS power board