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:
Jun. 01, 2021
Filed:
Oct. 20, 2016
Tdk Corporation, Tokyo, JP;
Yuki Asazuma, Tokyo, JP;
Kei Tanabe, Tokyo, JP;
Akihiro Unno, Tokyo, JP;
Atsushi Matsuda, Tokyo, JP;
Masashi Takahashi, Tokyo, JP;
TDK CORPORATION, Tokyo, JP;
Abstract
An object of the present invention is to provide a magnetic sensor that can reduce influences of a disturbance magnetic field while ensuring high detection sensitivity. The magnetic sensor includes a sensor chiphaving an element formation surfaceS on which magnetic detection elements MR, MRare formed, a first magnetic memberplaced on the element formation surfaceS and having a first height Has a height from the element formation surfaceS, and a second magnetic memberlocated on an opposite side of the magnetic detection elements MR, MRto the first magnetic memberand having a second height Hlower than the first height H. According to the present invention, because the height Hof the second magnetic memberis lower than that of the first magnetic member, a detection magnetic field attracted to the second magnetic membercan be reduced while a disturbance magnetic field is shielded by the second magnetic member. Accordingly, influences of the disturbance magnetic field can be reduced while high detection sensitivity is ensured.