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:
Apr. 25, 1989
Filed:
May. 30, 1986
Applicant:
Inventors:
Assignee:
TDK Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428336 ; 2041922 ; 20419231 ; 427131 ; 427132 ; 428422 ; 428694 ; 428695 ; 428900 ;
Abstract
A magnetic recording medium is provided comprising a non-magnetic substrate, a magnetic metal layer of continuous thin film type deposited on the substrate, and a topcoat film on the magnetic layer. The topcoat film is formed by sputtering or ion plating a fluorocarbon resin so that it consists essentially of carbon and fluorine, and fluorine atoms of the topcoat film are chemically combined with metal atoms of the magnetic layer in proximity to the interface.