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. 07, 1995
Filed:
Aug. 16, 1994
Gunter A Kohler, Stillwater, MN (US);
Seth M Kirk, Minneapolis, MN (US);
Gary J Follett, St. Paul, MN (US);
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Abstract
A process and apparatus for the plasma deposition of a carbon-rich coating onto a substrate is provided. This method includes the steps of: providing a substrate in a vacuum chamber; and generating a carbon-rich plasma in the vacuum chamber by injecting a plasma gas into a hollow cathode slot system containing a cathode made of two electrode plates arranged parallel to each other, providing a sufficient voltage to create and maintain a carbon-rich plasma in the hollow cathode slot system, and maintaining a vacuum in the vacuum chamber sufficient for maintaining the plasma. The plasma is deposited on the substrate to form a carbon-rich coating.