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:
Sep. 01, 1998
Filed:
Sep. 23, 1996
Applicant:
Inventors:
Noriyuki Kitaori, Tochigi, JP;
Osamu Yoshida, Tochigi, JP;
Katsumi Sasaki, Tochigi, JP;
Junko Ishikawa, Tochigi, JP;
Katsumi Endo, Tochigi, JP;
Assignee:
Kao Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428332 ; 428336 ; 4286 / ; 4286 / ; 4286 / ; 4286 / ; 4286 / ; 428900 ;
Abstract
A magnetic recording medium comprising a substrate and a magnetic layer, wherein the magnetic layer is coated on the substrate, the magnetic layer is an Fe--C--O magnetic layer and has a oblique column structure, and an O concentration (at. %) Oc in a center part of the column and an O concentration (at. %) Os around a surface part of the column satisfy Oc<Os. The magnetic recording medium has an excellent S/N, and has excellent corrosion resistance and durability.