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:
Dec. 26, 1995
Filed:
Sep. 30, 1994
Applicant:
Inventors:
Takahiro Mori, Hino, JP;
Kunitsuna Sasaki, Hino, JP;
Hisato Kato, Hino, JP;
Kazuyoshi Imai, Hino, JP;
Takahiro Hayashi, Saku, JP;
Assignees:
Konica Corporation, , JP;
TDK Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428141 ; 428323 ; 428328 ; 428329 ; 428330 ; 428336 ; 428341 ; 4286 / ; 4286 / ; 428900 ; 427128 ;
Abstract
Disclosed are a magnetic recording medium which comprises a non-magnetic support, one or more coating layers provided on the non-magnetic support and an upper layer of the coating layers being a magnetic layer containing ferromagnetic metallic powder with the total thickness of the coating layers being 0.5 to 2.5 .mu.m, wherein the magnetic layer has a surface roughness Ra of 1.0 to 4.6 nm and a surface roughness R10z of 8.0 to 35.0 nm, which satisfy the relations of: