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:
Apr. 27, 2004
Filed:
Dec. 27, 2001
Applicant:
Inventors:
Kenzo Hanawa, Chiba, JP;
Hiroshi Ohsawa, Chiba, JP;
Assignee:
Showa Denko Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/66 ; G11B 5/70 ; B32B 1/300 ; B05D 5/12 ;
U.S. Cl.
CPC ...
G11B 5/66 ; G11B 5/70 ; B32B 1/300 ; B05D 5/12 ;
Abstract
A magnetic recording medium comprising, in order, a non-metallic substrate; an amorphous metallic film having an amorphous structure; a crystal-structure-regulating film of NiP-based alloy; and a non-magnetic undercoat film and a magnetic film; and wherein the crystal-structure-regulating film has a film thickness of 50 nm or less, and a total film thickness of the amorphous metallic film and the crystal-structure-regulating film is at least 60 nm is disclosed.