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:
Jan. 11, 1983
Filed:
Aug. 04, 1980
Applicant:
Inventors:
Assignee:
Sony Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428421 ; 427 44 ; 427128 ; 427131 ; 428447 ; 428520 ; 428522 ; 428523 ; 428695 ; 428409 ; 428900 ; 360134 ;
Abstract
A magnetic recording medium having low friction coefficient and superior in aging characteristics is disclosed. The magnetic recording medium is provided with a lubricant which is strongly bonded to the magnetic recording medium by a bombardment of an electron beam. In one embodiment, the lubricant containing a molecular chain having a lubricating property, and a double bond sensitive to dissociation products such as free radicals are coated on a magnetic layer and then electron beam irradiates the magnetic layer. A radical reaction then occurs causing a covalent bond of the lubricant to the magnetic recording layer.