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:
Nov. 26, 1991
Filed:
Apr. 27, 1989
Applicant:
Inventors:
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428336 ; 428693 ; 428694 ; 428900 ;
Abstract
In a soft-magnetic thin film, layers of iron carbide are laminated alternately with layers of at least one of iron, iron nitride and iron carbon-nitride and when needed, layers of non-magnetic material. The thin film provides particular features including 1) saturation magnetic flux density of at least 1.5 teslas; 2) relative permeability and coercive force greater than those of the conventional soft-magnetic material; and 3) durability for practical use.