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:
Jun. 23, 1987
Filed:
Apr. 08, 1986
Akihiko Ikegaya, Itami, JP;
Masaaki Tobioka, Itami, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
A surface-coated article or part, for example, hard material-coated steels or cemented carbides for cutting tools, wear resisting tools, sliding parts or decoration articles, having good properties comparable to those obtained by the PVD method, can be produced by a plasma CVD method characterized by using jointly a high frequency source and a direct current source as a plasma exciting source, holding a substrate or base metal at a negative potential by the direct current source and adjusting a high frequency power density applied to a plasma-forming space to 0.01 to 1 W/cm.sup.3, an absolute value of a direct current voltage to at most 1500 V and a gaseous atmosphere pressure to 0.05 to 5 Torr.