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:
Mar. 18, 2003
Filed:
Jan. 14, 2000
Seiji Kumagai, Miyagi, JP;
Yoshito Ikeda, Tochigi, JP;
Terunobu Miyazaki, Miyagi, JP;
Yoshiyuki Fukumoto, Miyagi, JP;
Sony Corporation, Tokyo, JP;
Abstract
A magnetic resistance element is provided that includes an upper magnetic layer, which is formed in contact with an anti-ferromagnetic layer, and at least two magnetic layers that are layered with tunnel barrier wall layers respectively inserted between the first magnetic layer and each of the at least two magnetic layers such that the magnetic resistance element has a combined resistance that corresponds to one of four predefined magnetic resistances and that can be changed to another of the four predefined magnetic resistances by applying a predefined recording magnetic field pattern to the magnetic resistance element.