Abstract: The invention pertains to high-molecular compound-based composite materials using carbon and can be used for anodes of electrolytic capacitors made on the elastic dielectric film base with current-carrying coating. Polyester-base film material chiefly of polyethylene terephthalate has nanodimensional metal coating. New is that a diamond-like layer 5-50 nm thick is placed between the modified surface of the polyester base and metal coating and a sponge metal layer 0.5-20 ?m thick is made on the metal coating surface, said sponge metal layer has a surface development factor within the range of 80-400 and the diamond-like nanolayer is sp3-hybridization of amorphous carbon atoms gas-phase deposited in vacuum by means of a ion-plasmous source. The proposed film material with a wide range of electrophysical properties is intended to be used in microelectronics and radio engineering as versatile constructional material.