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公开(公告)号：US20200326390A1
公开(公告)日：2020-10-15
申请号：US16912714
申请日：2020-06-26
Applicant: Asahi Kasei Microdevices Corporation , TDK Corporation
Inventor： Yoshitaka OKUTSU , Masanori YOSHIDA , Kazuhiro ISHIDA , Kazuya WATANABE , Hiraku HIRABAYASHI , Masanori SAKAI
Abstract: An object is to provide a magnetic sensor module that suppresses a size of a magnetic sensor chip while applying a uniform calibration magnetic field to a magneto-resistive element. Provided is a magnetic sensor module comprising an IC chip having a first coil; and a magnetic sensor chip that is disposed on a surface of the IC chip and includes a first magnetic sensor that detects magnetism in a direction of first axis, wherein a planar shape of the IC chip encompasses a planar shape of the magnetic sensor chip, and the first coil has a planar shape including three or more sides, and is, when seen in a cross section along at least one side of the planar shape, is formed so as to cover a region, in a direction of the one side, of the first magnetic sensor.
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公开(公告)号：US20200326399A1
公开(公告)日：2020-10-15
申请号：US16912718
申请日：2020-06-26
Applicant: Asahi Kasei Microdevices Corporation , TDK Corporation
Inventor： Masanori YOSHIDA , Yoshitaka OKUTSU , Kazuhiro ISHIDA , Kazuya WATANABE , Hiraku HIRABAYASHI , Masanori SAKAI
Abstract: An object is to provide a magnetic sensor module reducing influence of heat generated from a coil on a magnetic sensor. A conventional method requires, on a magnetic sensor chip, multiple temperature measuring circuits corresponding to multiple magnetic sensors, and many pads for connection to an IC chip. Therefore, the problem is increase in size of the sensor chip mounting the sensors and in manufacturing cost. Provided is a magnetic sensor module comprising an IC chip including a first coil, a first pad connected to one end of the coil, and a second pad to the other end; a magnetic sensor chip disposed on the IC chip's surface, including a first magnetic sensor detecting first axial magnetism; a first external output terminal; a first conductive wire for connecting the first pad and terminal; a second external output terminal; and a second conductive wire for connecting the second pad and terminal.
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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.
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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
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.
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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
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.
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Patent Agency Ranking
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
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.
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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
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.
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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.
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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
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.
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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.
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