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1. 发明授权

US11408950B2 Magnetic sensor 有权
公开(公告)号：US11408950B2
公开(公告)日：2022-08-09
申请号：US17036104
申请日：2020-09-29
申请人： TDK Corporation
发明人： Kentaro Harada , Tsuyoshi Umehara , Kenichi Takano
IPC分类号： G01R33/09
摘要： A magnetic sensor is provided that can attenuate a magnetic field in a direction that is perpendicular to the magnetic field detecting direction at a higher rate than the magnetic field in the magnetic field detecting direction.
Magnetic sensor 1 has: first soft magnetic layer 3; a pair of second soft magnetic layers 4A, 4B that is positioned at a location that is different from first soft magnetic layer 3 in the Z direction of first soft magnetic layer 3; and magnetic field detecting element 2 that is positioned between first soft magnetic layer 3 and second soft magnetic layers 4A, 4B in the Z direction, wherein magnetic field detecting element 2 has a magnetic field detecting direction that is parallel to a direction in which the pair of second soft magnetic layers 4A, 4B is arranged. As viewed in the Z direction, second soft magnetic layers 4A, 4B are positioned on both sides of a center of first soft magnetic layer 3, and magnetic field detecting element 2 is positioned inside of a periphery of first soft magnetic layer 3.

2. 发明授权

US11598827B2 Method of designing and manufacturing magnetic sensor 有权
公开(公告)号：US11598827B2
公开(公告)日：2023-03-07
申请号：US17543951
申请日：2021-12-07
申请人： TDK Corporation
发明人： Tsuyoshi Umehara , Kentaro Harada , Takafumi Kobayashi
IPC分类号： G01R33/09 , G01R33/00
摘要： A method of designing a magnetic sensor that can easily accommodate various design conditions is provided. The method has: preparing magnetic sensors, wherein, for each magnetic sensor, magnetization directions of the first to fourth magnetically pinned layers form first to fourth angles θ1 to θ4 relative to a specific reference angle, respectively, and θ1=θ3, θ2=θ4, θ1≠θ2, and each magnetic sensor has a value of θ1-θ2 that is different from values of 01-02 of remaining magnetic sensors, for each magnetic sensor, obtaining a relationship between an angular range of the magnetization direction of the first to fourth magnetically free layers and an output range of the magnetic sensor, wherein the angular range satisfies a specific linear relationship between the magnetization direction and the output of the magnetic sensor, and selecting a magnetic sensor that satisfies required conditions for the angular range and the output range from among the magnetic sensors.

3. 发明授权

US11561079B2 Magnetic sensor assembly and camera module having the same 有权
公开(公告)号：US11561079B2
公开(公告)日：2023-01-24
申请号：US17502724
申请日：2021-10-15
申请人： TDK Corporation
发明人： Kentaro Harada , Tsuyoshi Umehara
IPC分类号： G01B7/30 , G01D5/14 , G01D5/16 , G03B5/04
摘要： Magnetic sensor assembly 1 has first member 10 having first to third magnetic sensors 13A to 13C, and second member 20 having first to third magnets 22A to 22C. Second member 20 can be moved in X and Y directions and can be rotated about a Z axis relative to first member 10. Output of first to third magnetic sensors 13A to 13C monotonously changes. A change of the output of first magnetic sensor and a change of the output of second magnetic sensor are different from each other. First to third magnets are positioned on first to third straight lines L1 to L3. A first angle that is formed between first straight line L1 and X axis, a second angle that is formed between second straight line L2 and X axis, and a third angle that is formed between third straight line L3 and Y axis are same.

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