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:
Feb. 02, 1988
Filed:
Sep. 08, 1986
Applicant:
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
428216 ; 427128 ; 427131 ; 427132 ; 428336 ; 428421 ; 428422 ; 428694 ; 428695 ; 428900 ; 428409 ;
Abstract
This invention relates to a magnetic recording medium comprising a magnetic recording film formed on a substrate directly or with a protective layer therebetween, characterized in that a surface treatment layer made of a reaction product of an azide compound is provided on the magnetic recording film, and preferably a lubricative material layer is further provided on the surface treatment layer. The surface treatment agent is covalently bonded to the surface of the magnetic recording film with an aid of nitrene to improve the durability of the magnetic recording film.