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:
Dec. 01, 1998
Filed:
Feb. 24, 1997
Applicant:
Inventors:
Isatake Kaitsu, Kawasaki, JP;
Iwao Okamoto, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; B32B / ;
U.S. Cl.
CPC ...
428323 ; 428323 ; 428331 ; 428336 ; 4286 / ; 4286 / ; 4286 / ; 428900 ;
Abstract
A magnetic recording medium comprising: a substrate; and a magnetic recording layer provided on the substrate, the magnetic recording layer being comprised of a thin film of a nonmagnetic material with crystal grains of Co.sub.100-x Pt.sub.x, wherein 10.ltoreq..times.<20, having an f.c.c. structure and an average grain diameter of not more than 50 nm being substantially uniformly dispersed therein, the product of the residual magnetization and the thickness of the magnetic recording layer being not more than 150 Gauss..mu.m.