Patent ID: 7955691
Filing Date: 2011-06-07
Classification: C23C,F16C,Y10T

Abstract:
1. An amorphous hard carbon film formed on a substrate surface, wherein the substrate comprises a slide member and the film comprises: a first amorphous carbon layer having a thickness of between at least 5 nm and 70 nm or less and substantially consisting only of carbon formed on the substrate surface; and a second amorphous carbon layer having a thickness of between at least 0.5 μm and 5.0 μm or less and substantially consisting only of carbon formed on the outermost surface of the first amorphous carbon layer, wherein the transmission electron microscope image of the first amorphous carbon layer is brighter than the transmission electron microscope image of the second amorphous carbon layer when the cross section is observed and wherein the density of the first amorphous carbon layer is lower than the density of the second amorphous carbon layer.