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:
Feb. 23, 1988
Filed:
Nov. 06, 1986
Applicant:
Inventors:
Assignee:
TDK Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
428323 ; 427 44 ; 427131 ; 428329 ; 428694 ; 428900 ;
Abstract
A coating type magnetic recording medium particuarly suitable as a mangetic disk is provided, which comprises a substrate and a magnetic layer of a plate magnetic powder and a binder on the substrate. Selection is made such that the plate magnetic powder has an average particle diameter of up to 0.2 .mu.m and an average flakiness of at least 2, the magnetic layer is up to 1.8 .mu.m thick, and the magnetic recording medium has a coercive force of a value x in Oe and a rectangular ratio Br/Bm of a value y both in a direction perpendicular to the magnetic layer surface, which fall in the range defined by the following equations: