Patent ID: 7694416

Claim:
A method of producing a wired circuit board, the method comprising the steps of: preparing a wired circuit board comprising an insulating base layer, a conductive pattern formed on the insulating base layer, and insulating cover layer on the insulating base layer so as to cover the conductive pattern, wherein an opening is formed in the insulating cover layer, and the conductive pattern comprises an portion exposed from the opening of the insulating cover layer, a wire covered with the insulating cover layer, and a terminal portion exposed from an end portion in the insulting cover layer different from a position in which the opening of the insulating cover is located; disposing a contact member formed of a material having a standard electrode potential lower than that of a conductive material forming the conductive pattern such that the contact member is in contact with the conductive pattern, in the exposed portion; and dipping the wired circuit board including the disposed contact member in a polymerization solution of a conductive polymer to form a semiconductive layer on a surface of the insulating base layer and the insulating cover layer such that the material forming the contact member is dissolved, while the conductive material forming the conductive pattern is less likely to be dissolved due to a principle of a local cell formed in the contact member and the conductive pattern.