Patent ID: 9183965
Filing Date: 2015-11-10
Classification: C01B,C23C,G01R,H01B,Y10T

Abstract:
1. A method for vapor-phase formation of a conductive hard carbon film on a base material under vacuum, the method comprising a step of purifying and/or flattening the base material by irradiating the base material with a gas cluster ion beam; a step of evaporating/vaporizing a carbon film forming material containing a carbonaceous material containing substantially no hydrogen and a borohydride material, allowing the evaporated/vaporized material, which is optionally ionized, to adhere to the surface of the base material, and irradiating the carbon film forming material with a gas cluster ion beam for film formation; and a step of decomposing the borohydride into hydrogen and boron when the gas cluster ions collide against the surface of the base material, allowing the decomposed hydrogen to go out of the conductive hard carbon film, allowing less than or equal to 1 atom percent or less of the hydrogen to remain in the conductive hard carbon film, and allowing the decomposed boron to remain in the conductive hard carbon film.