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:
Aug. 06, 1996
Filed:
May. 17, 1993
Applicant:
Inventors:
Assignee:
Hitachi Maxell, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; B32B / ;
U.S. Cl.
CPC ...
428332 ; 428336 ; 4286 / ; 4286 / ; 4286 / ; 4286 / ; 428900 ;
Abstract
There is disclosed a magnetic recording medium comprising a non-magnetic substrate, a soft magnetic layer formed on the substrate, with or without a non-magnetic sublayer interposed therebetween, and a perpendicular magneto-anisotropic recording layer laminated on the soft magnetic layer, with or without a non-magnetic intermediate layer therebetween, the soft magnetic layer being composed of material saturation magnetization thereof being higher than at least that of the recording layer, and whose thickness is in the range of from 50 to 1,000 .ANG..