1. FR4+PI material 2. 6L 1oz copper, Board Thickness1.6 mm 3. Competitive ... ,OSP, immersion tin, plating goldBoard Panel Size: 400mm*610mmBoard Layer: 1L-4LBoard thickness: 0.1mm to 0.25mmFinished Copper thickness ... index base material Polyimide (PI), polyester (PET), FR4 layerSingle-layer, double-layer, multi-layerCopper thickness12um, 18um, 35um, 70umWorking panel size400mm*610mmsurface finishOSP/ ...