Patent ID: 10527938

Abstract:
[Object] To provide a method for producing an electrical wiring member having a layered structure of copper wiring and a blackening layer and to provide the electrical wiring member through a search for a material for the blackening layer, the material being etched at a rate close to that for the copper wiring under conditions where etching controllability is ensured. [Solution] A method for producing an electrical wiring member according to the present invention includes a step of forming, on at least one main surface of a substrate, a layered film 6 of a Cu layer 3 and CuNO-based blackening layers (2a and 2b); a step of forming a resist layer 4a in a predetermined region on the layered film 6; and a step of removing a partial region of the layered film 6 by bringing the layered film 6 into contact with an etchant.