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. 18, 2003
Filed:
Sep. 14, 2000
Applicant:
Inventor:
Keiko Higashi, Tachikawa, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/82 ; G11B 5/60 ;
U.S. Cl.
CPC ...
G11B 5/82 ; G11B 5/60 ;
Abstract
A magnetic recording medium is obtained, which satisfies R−9709/N<6.6, when its surface is attracted by a magnetic head with a surface pressure of 250 gf/mm or less or has a load area ratio of 5% or less, where N is the number of asperities per &mgr;m square and R (nm) is an average of radii of curvature at peaks of the asperities. This magnetic recording medium does not cause dynamic attraction even if the head contact slides with it, and rotates stably, so that information can stabily be written/read well.