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. 19, 2002
Filed:
May. 28, 1998
Hitoshi Iwasaki, Yokosuka, JP;
Yuichi Ohsawa, Tokyo, JP;
Reiko Kondoh, Yokohama, JP;
Yuzo Kamiguchi, Yokohama, JP;
Susumu Hashimoto, Ebina, JP;
Tomomi Funayama, Fujisawa, JP;
Hiromi Fuke, Kawasaki, JP;
Junichi Akiyama, Kawasaki, JP;
Kazuhiro Saito, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A GMR element part is formed of a laminated structure which comprises at least one pair of ferromagnetic layers and a nonmagnetic intermediate layer interposed between the pair of ferromagnetic layers. Signal magnetic field detecting ferromagnetic layers will be optionally disposed one each outside the pair of ferromagnetic layers. The GMR element part consists of a laminated structure which is provided with one pair of GMR ferromagnetic layers opposed to each other across a nonmagnetic intermediate layer or a laminated structure which is provided with one pair of GMR ferromagnetic layer opposed to each other across a nonmagnetic intermediate layer and at least one low-permeability ferromagnetic layer disposed there between through the medium of a nonmagnetic intermediate layer. The GMR element part functions as a read head for sensing the resistance which is varied when signal magnetic fields of mutual opposite directions are applied to the pair of GMR ferromagnetic layers and displaying a differential detection type output response. A granular type ferromagnetic intermediate layer will be used as the GMR element part.