Metal Foil with Electric Resistance Film and Method of Producing the Same

Abstract

A copper foil with an electric resistance film in which a film with higher electrical resistivity than the metal foil is provided on the metal foil, wherein a plurality of electric resistance films with different electric resistance is arranged in parallel on the same metal foil. With conventionally used built-in resistor elements, one resistor element is configured of one type of substance on the copper foil. Nevertheless, when actually mounting the resistor elements, the circuit design tolerance can be increased and the number of man-hours can be reduced with two resistor elements and further with a plurality of resistor elements compared to a case with one resistor element. This invention aims to provide a metal foil with a built-in resistor element comprising two or more types of resistor elements on one metal foil.

Dependencies are inferred from the claim text.