Nissha Co., Ltd.

Hiroaki Uefuji

Yuki Matsui

Yoshihiro Sakata

Hideaki Nada

Hirotaka Shigeno

Hisaya Takayama

[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 filmof a Cu layerand CuNO-based blackening layers (and); a step of forming a resist layerin a predetermined region on the layered film; and a step of removing a partial region of the layered filmby bringing the layered filminto contact with an etchant.

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Kyoto, Japan

Hiroaki Uefuji