Abstract: A surge suppressing device includes a voltage-dependent resistor having an opening formed therethrough. A pair of preformed pads formed of an electrically conductive material is located adjacent a first and second side respectively of the voltage-dependent resistor proximate the opening. The electrically conductive material flows through the opening creating an electrical short between the first and second sides when the voltage-dependent resistor is heated in response to excessive leakage current flowing therethrough.

Abstract: A punch has a planar surface and raised portions extending from the planar surface. First ones of the raised portions may have a height of approximately 3-25 mils. Second ones of the raised portions may have a greater depth than the first raised portions. The punch may be heated and/applied to the planar surface of a substrate which may also be pre-heated and which has properties of becoming deformed when subjected to heat and pressure. The punch produces cavities and grooves in the substrate at the positions of the raised portions. Electrical components may be disposed in the cavities in the substrate and an electrically conductive material may be disposed in the grooves to communicate with the electrical components. The raised portions in the punch may be provided by printed circuit techniques or by matching or by laser techniques. Alternatively, a foil may be disposed on the planar surface of the punch and the raised portions of the punch.