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:
Mar. 28, 1989
Filed:
Apr. 03, 1987
Applicant:
Inventors:
Kenji Yokoyama, Nagano, JP;
Masatoshi Nakayama, Nagano, JP;
Fumio Maruta, Nagano, JP;
Kunihiro Ueda, Nagano, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
428336 ; 427 40 ; 427 41 ; 427128 ; 427129 ; 427131 ; 427132 ; 428408 ; 428421 ; 428422 ; 428694 ; 428695 ; 428900 ;
Abstract
In a magnetic recording medium wherein a metal thin film magnetic layer, a protective film or carbon, and a topcoat layer are formed on a rigid substrate in this order, the topcoat layer is from an organic fluorine compound by gas phase deposition.