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. 20, 1986
Filed:
Apr. 06, 1984
Erwin Eichen, West Bloomfield, MI (US);
James D Flasck, Rochester, MI (US);
Energy Conversion Devices, Inc., Troy, MI (US);
Abstract
A coating and method of depositing it is provided. The wear resistant coating comprises a thin layer of disordered boron and carbon applied to a substrate. The coating has good adherence and provides good resistance to wear so that it is useful as a tool coating. In a more specific embodiment, the coating is disordered boron carbide. The coating can have a high gloss and can also be used as a decorative coating. The coating can be made by sputtering boron and carbon onto a substrate. A bias voltage may be applied to the substrate during sputtering. In accordance with one embodiment, the disordered boron and carbon coating is of a composition B.sub.x C.sub.1-x where x is from about 0.60 to about 0.90. In accordance with another embodiment, an improved molding tool is provided that includes a disordered carbon coating on at least a portion of the working surface of the molding tool. The coating provides improved release characteristics, longer tool life and results in molded articles having smoother finishes and improved detail.