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:
Feb. 15, 2022
Filed:
Jul. 15, 2020
Applicant:
Alps Alpine Co., Ltd., Tokyo, JP;
Inventor:
Masamichi Saito, Miyagi-ken, JP;
Assignee:
ALPS ALPINE CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 33/09 (2006.01); G01R 33/00 (2006.01); H01L 43/08 (2006.01); H01L 43/10 (2006.01); H01L 43/12 (2006.01);
U.S. Cl.
CPC ...
G01R 33/093 (2013.01); G01R 33/0017 (2013.01); G01R 33/0052 (2013.01); G01R 33/0076 (2013.01); G01R 33/098 (2013.01); H01L 43/08 (2013.01); H01L 43/10 (2013.01); H01L 43/12 (2013.01);
Abstract
A magnetic detector includes a full-bridge circuit including magnetoresistive sensors on the same substrate. The magnetoresistive sensors include two magnetoresistive films and have different relationships between the fixed magnetization direction and the bias application direction. The fixed magnetization direction and the bias application direction are determined with three or more exchange coupling films including antiferromagnetic layers with different blocking temperatures. Thus, the magnetic detector has high resistance to a strong magnetic field, is easy to produce, and has a high degree of flexibility in production.