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:
Aug. 15, 2000
Filed:
Jun. 04, 1998
Seiji Kumagai, Miyagi, JP;
Sony Corporation, Tokyo, JP;
Abstract
A novel magnetic tunnel device capable of displaying a magnetic tunnelling effect in stability and with high sensitivity even to an external magnetic field of a weak intensity. The magnetic tunnel device 1 has a layered structure including a first magnetic layer 2, a granular layer 3 layered on the first magnetic layer 2 and a second magnetic layer 4 layered on the surface of the granular layer 3 opposite to its surface carrying the first magnetic layer 2. The granular layer 3 has a granular structure which is made up of a magnetic metal phase 7 and an insulating phase 8. The first magnetic layer 2 and/or the second magnetic layer 4 of the magnetic tunnel device is formed of a ferromagnetic material having soft magnetic properties. The current is supplied in the layering direction of the layered structure.