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:
Jul. 26, 1988
Filed:
Apr. 21, 1986
Applicant:
Inventors:
Assignee:
TDK Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428141 ; 427128 ; 428323 ; 428329 ; 428332 ; 428694 ; 428900 ;
Abstract
In a coating type perpendicular magnetic recording medium intended for digital recording comprising a substrate and a magnetic layer thereon, the magnetic layer is formed from a composition of a binder, preferably radiation-curable binder and plate magnetic material such as hexagonal plate barium or strontium ferrit having an average particle diameter of up to 0.15 .mu.m and a flakiness of at least 6.