PROBLEM TO BE SOLVED: To provide a deposition method for enhancing the peel strength of a metal-resin interface, in a thin film having a resistive layer on at least one side of a thermoplastic resin film.SOLUTION: After depositing an electric resistance layer at least on one side of a thermoplastic resin film without interposing an adhesive, electrification heating of the electric resistance thin film layer is performed by feeding a current thereto. Heating is performed so that the electric resistance thin film layer has a temperature between a heating lower limit temperature determined by the glass transition point and a heating upper limit determined by adding 1/3 of the difference, obtained by subtracting the glass transition point from the melting point of the electric resistance thin film layer, to the glass transition point.
