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:
May. 14, 2002
Filed:
Oct. 08, 1998
Applicant:
Inventors:
Naoya Hasegawa, Niigata-ken, JP;
Masamichi Saito, Niigata-ken, JP;
Kazuya Oominato, Niigata-ken, JP;
Yutaka Yamamoto, Niigata-ken, JP;
Akihiro Makino, Niigata-ken, JP;
Assignee:
Alps Electric Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/66 ;
U.S. Cl.
CPC ...
G11B 5/66 ;
Abstract
The antiferromagnetic layer is formed of the X—Mn alloy (X is an platinum group element) and the interface structure of with the pinned magnetic layer is made to be non-coherent by properly adjusting the composition ratio of X. Consequently, the crystal structure of the antiferromagnetic layer is transformed so as to obtain a large exchange anisotropic magnetic field by subjecting the layer to a heat treatment, making it possible to improve the reproduction characteristic over the conventional art.