PTH & Surface Copper Measurement

PTH (Plating Through Hole) Metallized hole, so the layer to which it is connected is conductive; there is an electrical connection. In contrast, NPTH (Non Plating Through Hole) nonmetallic hole refers to the absence of copper inside the hole; electrical isolation

The CMI563 Surface Thickness Gauge is a handy, easy-to-use handheld thickness gauge that combines fast, accurate, affordable and reliable quality and is designed for rigid and flexible measurements in single, double or multi-layer printing Surface copper foil thickness design on the circuit board