Printed resistor

Abstract

A printed resistor is proposed which has a laminated structure comprising a substrate and a foil current-carrying pattern attached to the substrate and provided with two current terminals and with at least one potential terminal. The current-carrying pattern is made as a network of series-parallel arms. A section of one of the parallel arms of the pattern is made of a material whose temperature coefficient of resistance exceeds that of the material of the rest of the current-carrying pattern. One side of said section is connected to one of the current terminals and the other, to one of the potential terminals. Proposed also is a method of manufacturing such printed resistors which consists in that, first, an area of the foil with a size sufficient for the temperature compensating element of the resistor to be accommodated thereon is coated with a metal layer whose temperature coefficient of resistance and the rate of solution in an etching substance are higher than those of the foil material. Then, the foil together with its coating is heat-treated at a temperature high enough for the diffusion process at the boundary between the foil and said coating to be completed. After that the foil is glued to the substrate so that its coated side is attached to the latter. The current-carrying pattern is formed as a network of series-parallel arms so that a section of at least one of the parallel arms is located on the foil area bearing the metal coating.

Dependencies are inferred from the claim text.