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:
Mar. 26, 1985
Filed:
Oct. 30, 1981
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
The present invention relates to a process of physical vapor deposition which homogeneously and tightly coats hard compounds on the surface of cutting tools, parts requiring wear resistance or ornaments such as a watch case and the like in order to improve wear resistance, heat resistance, corrosion resistance, appearance and the like of said tools, parts or ornaments. The present invention can provide a method of physically coating a solid solution consisting of at least one compound selected from the group consisting of carbides, nitrides or oxides of metals belonging to IVb, Vb and VIb groups of the Periodic Table and/or aluminum oxide and zirconium oxide on the surface of said tools, parts or ornaments in the form of a single layer or multiple-layers, wherein the surface of said tools and the like is subjected to sputter cleaning in the atmosphere of hydrogen or the gaseous mixture of hydrogen and inert gas wherein hydrogen is present at 20% by volume or more, to homogeneously clean said surface of said tools and the like and as a result, the adhesion of the coating consisting of said compounds on said tools and the like is improved and equalized. Thus the above-mentioned properties of said tools and the like is further improved.