... (PET), FR4Surface Treatment: immersion gold,OSP, immersion tin, plating goldBoard Panel Size: 400mm*610mmBoard Layer: 1L-4LBoard thickness: 0.1mm to 0 ... layerSingle-layer, double-layer, multi-layerCopper thickness12um, 18um, 35um, 70umWorking panel size400mm*610mmsurface finishOSP/ immersion gold/ plating gold/ immersion tinMinimum hole ...