The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 13, 2003
Filed:
Mar. 21, 2001
Eiji Iwamura, Kobe, JP;
Abstract
A coating film and a coated machine component that have an excellent wear resistance, a low friction coefficient, and an excellent sliding performance are provided. A coating film of the present invention is a DLC hard multilayer film which has a low hardness hard carbon layer containing a graphite cluster having a mean size of 2 nm or more, and a high hardness hard carbon layer containing a graphite cluster having a mean size of 1 nm or less, the low hardness carbon layer and the high hardness carbon layer being amorphous structures each containing carbon as a main component, and being alternately laminated. The graphite cluster in the low hardness hard carbon layer preferably has a shell structure in which the C-planes of graphite are laminated in the form of spherical nuclei. Further, it is preferable that the outermost layer A is formed of the low hardness hard carbon layer, and the layer thickness thereof is set at from 2 nm to 200 nm. Still further, a component of the present invention is formed by laminating the DLC hard multilayer film on a substrate with an intermediate layer interposed therebetween.