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:
May. 07, 1996
Filed:
Apr. 30, 1993
Applicant:
Inventors:
Assignee:
TDK Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; G11B / ; B05D / ; C04B / ;
U.S. Cl.
CPC ...
428323 ; 428329 ; 428330 ; 4286 / ; 4286 / ; 427128 ; 427129 ; 427130 ; 427131 ; 252 6254 ; 252 6258 ; 252 6261 ; 252 6262 ; 252 6263 ;
Abstract
A magnetic recording medium includes a non-magnetic support and a magnetic layer, The magnetic layer comprises a binder and a Co-containing iron-based metal powder dispersed in the binder, characterized in that particles of the metal powder have a greater Co concentration in their surface layer than their inside of the particles, The Co-containing metal powder is easily dispersed in a binder and provides high Br/Bm and orientation. If Ba is contained in the starting powder the localization of Co in the surface area is realized.