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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.:

US 4671828 B1

PDFFull Text
Date of Patent:
Jun. 09, 1987

Filed:

Apr. 05, 1985

Magnetic thin film

Applicant:
Inventors:

Kazushi Yamauchi, Miyagi, JP;

Muneyuki Ogata, Miyagi, JP;

Tomio Kobayashi, Miyagi, JP;

Makoto Kubota, Miyagi, JP;

Tatsuo Kumura, Miyagi, JP;

Assignee:

Sony Corporation, Tokyo, JP;

Attorney:

Hill, Van Santen, Steadman & Simpson

Primary Examiner:

John P Sheehan

Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
148309 ; 428606 ; 420 78 ;
Abstract

A magnetic thin film consisting essentially of Fe, Al and Si and further containing oxygen has high magnetic permeability and high hardness without lowering the magnetic properties such as saturation magnetic flux density or coercive force. The magnetic thin film has an increased specific resistivity and a lowered eddy current loss in the high frequency region and is suitable for a core material of magnetic transducer heads used in a high frequency region. The magnetic thin film is prepared by, for example, physical vapor deposition or ion implantation.

Find Patent Forward Citations

Yamauchi, Kazushi. (1987). Magnetic thin film (U.S. Patent No. 4671828). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4671828

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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