公开(公告)号：US20240328834A1

公开(公告)日：2024-10-03

申请号：US18616564

申请日：2024-03-26

Applicant: TDK Corporation

Inventor： Kazuya WATANABE

IPC: G01D5/244

CPC classification number: G01D5/24485 ,  G01D5/2448 ,  G01D2205/20

Abstract: A magnetic sensor includes a first MR element disposed on an inclined surface and configured to generate a first detection signal, a second MR element disposed on an inclined surface and configured to generate a second detection signal, and a conversion section configured to convert the first detection signal and the second detection signal into a first corrected signal and a second corrected signal, respectively. The conversion section is configured to change an amplitude of at least either one of the first and second detection signals to make a ratio of the amplitude of the second corrected signal to the amplitude of the first corrected signal different from a ratio of the amplitude of the second detection signal to the amplitude of the first detection signal.

公开(公告)号：US20240192029A1

公开(公告)日：2024-06-13

申请号：US18585959

申请日：2024-02-23

Applicant: TDK Corporation

Inventor： Keisuke UCHIDA ,  Kazuya WATANABE

IPC: G01D5/16 ,  G01R33/00 ,  G01R33/09

CPC classification number: G01D5/16 ,  G01R33/0005 ,  G01R33/09 ,  G01R33/091 ,  G01R33/093 ,  G01R33/098

Abstract: The magnetic sensor of the invention has an element portion that is elongate, that exhibits magnetoresistive effect and that has a magnetically sensitive axis in a direction of a short axis thereof. The element portion is non-oval and can be arranged in an imaginary ellipse, wherein the imaginary ellipse has a major axis that connects both ends of the element portion with regard to a direction of a long axis thereof to each other and a minor axis that connects both ends of the element portion with regard to a direction of the short axis thereof to each other, as viewed in a direction that is perpendicular both to the short axis and to the long axis of the element portion.

公开(公告)号：US20220252681A1

公开(公告)日：2022-08-11

申请号：US17729149

申请日：2022-04-26

Applicant: TDK CORPORATION

Inventor： Masaki NAGATA ,  Kazuya WATANABE ,  Keisuke UCHIDA ,  Kohei HONMA ,  Hiraku HIRABAYASHI

IPC: G01R33/00 ,  G01R33/09 ,  G01R33/06

Abstract: A magnetic field detection device, containing a) a first soft magnetic body containing a1) a first plate including a first surface having a first outer edge; and a2) a first protrusion disposed directly or indirectly on the first surface of the first plate at a first arrangement position set back from the first outer edge, the first protrusion including a first tip on an opposite side to the first surface; and b) a magnetic detector provided in a vicinity of the first tip, wherein the magnetic detector has a magnetic sensing direction along the first surface, and the first protrusion is capable of bending a direction of a first magnetic flux, which comes into the first plate, along the first surface.

公开(公告)号：US20220244321A1

公开(公告)日：2022-08-04

申请号：US17722734

申请日：2022-04-18

Applicant: TDK CORPORATION

Inventor： Masaki NAGATA ,  Kazuya WATANABE ,  Keisuke UCHIDA ,  Kohei HONMA ,  Hiraku HIRABAYASHI

IPC: G01R33/00 ,  G01R33/02

Abstract: Provided is a magnetic field detection device that includes a first and second soft magnetic bodies, and a magnetic detector. The first and second soft magnetic bodies extend along a first plane and are disposed in confronted relation in a third direction. The first plane includes both a first direction and a second direction orthogonal to the first direction. The third direction is orthogonal to both the first and second directions. The magnetic detector is provided between the first and second soft magnetic bodies in the third direction.

公开(公告)号：US20210165057A1

公开(公告)日：2021-06-03

申请号：US17171560

申请日：2021-02-09

Applicant: TDK Corporation

Inventor： Keisuke UCHIDA ,  Kazuya WATANABE

IPC: G01R33/09 ,  G01R33/00

Abstract: The magnetic sensor of the invention has an element portion that is elongate, that exhibits magnetoresistive effect and that has a magnetically sensitive axis in a direction of a short axis thereof. The element portion is non-oval and can be arranged in an imaginary ellipse, wherein the imaginary ellipse has a major axis that connects both ends of the element portion with regard to a direction of a long axis thereof to each other and a minor axis that connects both ends of the element portion with regard to a direction of the short axis thereof to each other, as viewed in a direction that is perpendicular both to the short axis and to the long axis of the element portion.

公开(公告)号：US20200292638A1

公开(公告)日：2020-09-17

申请号：US16745786

申请日：2020-01-17

Applicant: TDK Corporation

Inventor： Naoki OHTA ,  Kazuya WATANABE

IPC: G01R33/24 ,  G01R33/038

Abstract: A magnetic sensor includes a base material, a plurality of magnets provided at predetermined spacing on the base material, and a plurality of magnetic detection parts respectively provided close to the plurality of magnets. Each of the plurality of magnetic detection parts outputs a signal in accordance with change in the magnetic field accompanying deformation of the base material.

公开(公告)号：US20190293731A1

公开(公告)日：2019-09-26

申请号：US16259091

申请日：2019-01-28

Applicant: TDK CORPORATION

Inventor： Kazuya WATANABE ,  Hiraku HIRABAYASHI

IPC: G01R33/02 ,  G01R33/09 ,  H01L43/08

Abstract: A magnetic sensor includes first, second, and third detection units for detecting components in X, Y, and Z directions of an external magnetic field. The third detection unit includes a soft magnetic structure. The first detection unit includes a first portion and a second portion. The second detection unit includes a third portion and a fourth portion. The first portion and the fourth portion are located on opposite sides of the third detection unit in the X direction. The second portion and the third portion are located on opposite sides of the third detection unit in the Y direction.

公开(公告)号：US20190137299A1

公开(公告)日：2019-05-09

申请号：US16182759

申请日：2018-11-07

Applicant: TDK Corporation

Inventor： Kazuya WATANABE

IPC: G01D5/16

Abstract: A magnetic sensor according to the invention comprises at least an element portion that is elongate and that has a magnetoresistive effect; and a soft magnetic body that sandwiches the element portion on both sides with regard to a short axis direction of the element portion. A width of at least one of both end portions of the element portion with regard to a long axis direction of the element portion gradually decreases as a distance in the long axis direction from a central portion of the element portion with regard to the long axis direction increases.

公开(公告)号：US20190137298A1

公开(公告)日：2019-05-09

申请号：US16182744

申请日：2018-11-07

Applicant: TDK Corporation

Inventor： Keisuke UCHIDA ,  Kazuya WATANABE

IPC: G01D5/16

Abstract: The magnetic sensor of the invention has an element portion that is elongate, that exhibits magnetoresistive effect and that has a magnetically sensitive axis in a direction of a short axis thereof. The element portion is non-oval and can be arranged in an imaginary ellipse, wherein the imaginary ellipse has a major axis that connects both ends of the element portion with regard to a direction of a long axis thereof to each other and a minor axis that connects both ends of the element portion with regard to a direction of the short axisthereof to each other, as viewed in a direction that is perpendicular both to the short axis and to the long axis of the element portion.

公开(公告)号：US20180156874A1

公开(公告)日：2018-06-07

申请号：US15686592

申请日：2017-08-25

Applicant: TDK CORPORATION

Inventor： Masaki NAGATA ,  Kazuya WATANABE ,  Keisuke UCHIDA ,  Kohei HONMA ,  Hiraku HIRABAYASHI

IPC: G01R33/00 ,  G01R33/06

CPC classification number: G01R33/0005 ,  G01R33/06 ,  G01R33/098

Abstract: Provided is a magnetic field detection device that includes a first soft magnetic body and a magnetic detector. The first soft magnetic body includes a first plate and a first protrusion. The first plate includes a first surface including a first outer edge. The first protrusion is provided at a first arrangement position in the first surface and includes a first tip on opposite side to the first surface. The first arrangement position is set back from the first outer edge. The magnetic detector is provided in the vicinity of the first tip.