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:
Nov. 15, 1983
Filed:
Feb. 28, 1983
Yasutomo Sasanuma, Kawagoe, JP;
Citizen Watch Co., Ltd., Tokyo, JP;
Abstract
Within a vacuum chamber filled with a low-pressure gas atmosphere including nitrogen, titanium is vaporized to coat a titanium nitride film on a surface of an ornamental part such as a watch case by a reactive ion plating method, and a gold film is coated thereon to modulate the color. In this process, the titanium vapor is supplied from an electron beam melting vapor source whereas the gold vapor is supplied from a sputtering vapor source, and the periods both vapors are supplied partly overlap. This process improves the reproducibility of color modulation by coating the gold film and enhances the affinity at the interface between the titanium nitride film and the gold film.