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:
Sep. 16, 2003
Filed:
Feb. 28, 2001
Applicant:
Inventors:
Teiichi Miyauchi, Kanagawa, JP;
Hiroshi Kano, Kanagawa, JP;
Tetsuya Mizuguchi, Kanagawa, JP;
Minoru Ikarashi, Kanagawa, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/39 ;
U.S. Cl.
CPC ...
G11B 5/39 ;
Abstract
A first ferromagnetic layer is made to show a single magnetic domain to prevent any magnetic walls from appearing. A pair of bias layers are made of a hard magnetic material showing a high resistivity are arranged at opposite ends of a TMR thin film . As a result, the sense current flowing through the TMR thin film is prevented from diverting to the bias layers . Thus, a sufficiently strong bias magnetic field can be applied to the TMR thin film . As a result, the free layer of the TMR thin film is made to show a single magnetic domain to prevent any magnetic walls from appearing.