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:
Sep. 19, 2000
Filed:
Apr. 16, 1999
Applicant:
Inventors:
Takayuki Deno, Ibaraki-ken, JP;
Kazuo Shishime, Ibaraki-ken, JP;
Assignee:
Victor Company of Japan, Limited, Kanagawa-ken, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428141 ; 428328 ; 428336 ; 4286 / ; 4286 / ; 428900 ;
Abstract
A disclosed magnetic recording medium is provided with a single magnetic layer coated on one surface of a non-magnetic substrate. The magnetic layer has a thickness of not less than 2 .mu.m, protrusions on a plane of a height of 10 nm from a center plane in measurement of surface roughness of the magnetic layer with a density of 5000 to 9000 protrusions/mm.sup.2 and protrusions on a plane of a height of 30 nm from the center plane with a density of 500 to 2000 protrusions/mm.sup.2.