公开(公告)号：US11428545B2

公开(公告)日：2022-08-30

申请号：US16877579

申请日：2020-05-19

Applicant: TDK CORPORATION

Inventor： Keisuke Uchida ,  Yongfu Cai

IPC: G01D5/16

Abstract: A position detection device includes a magnet that generates a magnetic field to be detected, and a magnetic sensor. The magnetic sensor detects the magnetic field to be detected and generates a detection value corresponding to the position of the magnet. The magnetic field to be detected has a first direction that changes within a first plane, at a reference position in the first plane. The magnetic sensor includes four MR elements. Each of the MR elements includes a first magnetic layer having first magnetization that can change in direction within a second plane corresponding to the each of the MR elements. The first plane and the second plane intersect at a dihedral angle α other than 90°. A detection value depends on the direction of the first magnetization.

公开(公告)号：US11175357B2

公开(公告)日：2021-11-16

申请号：US16877801

申请日：2020-05-19

Applicant: TDK Corporation

Inventor： Yongfu Cai ,  Yuta Saito

IPC: G01R33/09 ,  G01R15/20

Abstract: A magnetic sensor device includes a magnetic field converter that receives an input magnetic field input along a first direction and outputs an output magnetic field along a second direction, which is orthogonal to the first direction. A magnetic field detector is provided at a position where the output magnetic field can be applied. A magnetic shield that blocks an external magnetic field along the second direction, is provided. The magnetic field converter has a shape in which the length in a third direction, which is orthogonal to both the first direction and the second direction, is longer than the length in the second direction, when viewed along the first direction. The magnetic shield is provided at a position overlapping with the magnetic field converter and the magnetic field detector, when viewed along the first direction.

公开(公告)号：US10996291B2

公开(公告)日：2021-05-04

申请号：US16356210

申请日：2019-03-18

Applicant: TDK Corporation

Inventor： Yongfu Cai ,  Toshihide Suto

IPC: G01R33/09 ,  G01R33/00

Abstract: A magnetism detection device according to an embodiment of the disclosure includes a sensor section and a resistive section. The sensor section includes a first magnetism detection element. The first magnetism detection element has a first stacked structure and is configured to detect a magnetic field to be detected. The resistive section includes a first resistive element and is coupled to the sensor section. The first resistive element has the first stacked structure.