Patents by Inventor Hiraku Hirabayashi
Hiraku Hirabayashi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11965941Abstract: A magnetic sensor includes a magnetic sensor chip that includes a magnetoresistive effect element and a sealed part. The magnetoresistive effect element includes a free layer and a pinned layer. The sealed part has a first surface and a second surface, which is opposite the first surface. The shape of the sealed part in the plan view from the first surface side is substantially quadrilateral. The substantially quadrilateral shape has a first side and a second side, which are substantially parallel to each other. In the plan view, from the first surface side of the sealed part, the magnetization direction of the pinned layer, in a state in which the external magnetic field is not applied on the magnetoresistive effect element, is inclined with respect to an approximately straight line found through the least squares method using a plurality of points arbitrarily set on the first side.Type: GrantFiled: April 12, 2023Date of Patent: April 23, 2024Assignee: TDK CorporationInventors: Yuta Saito, Hiraku Hirabayashi, Yoshihiro Kudo
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Publication number: 20240125873Abstract: A magnetic sensor includes a substrate including a top surface; an insulating layer disposed on the substrate, the insulating layer including first and second inclined surfaces each inclined with respect to the top surface of the substrate; and an MR element. The MR element is disposed on the first inclined surface or the second inclined surface. The MR element includes a first side surface including a first portion and a second portion, the first portion and the second portion having different angles with respect to the first inclined surface or the second inclined surface.Type: ApplicationFiled: December 21, 2023Publication date: April 18, 2024Applicant: TDK CORPORATIONInventors: Hidekazu KOJIMA, Kenzo Makino, Hiraku Hirabayashi
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Patent number: 11959943Abstract: A magnetic field detection apparatus includes a magnetoresistive effect element and a conductor. The magnetoresistive effect element includes a magnetoresistive effect film extending in a first axis direction and including a first end part, a second end part, and an intermediate part between the first and second end parts. The conductor includes a first part and a second part that each extend in a second axis direction inclined with respect to the first axis direction. The conductor is configured to be supplied with a current and thereby configured to generate an induction magnetic field to be applied to the magnetoresistive effect film in a third axis direction orthogonal to the second axis direction. The first part and the second part respectively overlap the first end part and the second end part in a fourth axis direction orthogonal to both of the second axis direction and the third axis direction.Type: GrantFiled: May 26, 2022Date of Patent: April 16, 2024Assignee: TDK CORPORATIONInventors: Norikazu Ota, Kenzo Makino, Hiraku Hirabayashi
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Patent number: 11959979Abstract: This sensor unit includes a base having a substantially-rectangular planar shape including a first side and a second side that are substantially orthogonal to each other, and a plurality of first sensors provided on the base and arranged on a first axis. The first axis is substantially parallel to the first side and passes through a center position of the base.Type: GrantFiled: March 8, 2023Date of Patent: April 16, 2024Assignee: TDK CORPORATIONInventors: Kunihiro Ueda, Yoshimitsu Wada, Hiraku Hirabayashi, Kazuma Yamawaki, Tsuyoshi Umehara
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Patent number: 11953347Abstract: A position detection device includes a first position detector, a second position detector, and a signal generator. The first position detector includes a first magnetic field generation unit, a second magnetic field generation unit, and a first magnetic sensor. The second position detector includes a third magnetic field generation unit, a fourth magnetic field generation unit, and a second magnetic sensor. The positions of the second and fourth magnetic field generation units vary in response to variations in a detection-target position. The signal generator generates a position detection signal, which is the sum of a first detection signal generated by the first magnetic sensor and a second detection signal generated by the second magnetic sensor. Each of the first and second position detectors includes a bias magnetic field generation unit.Type: GrantFiled: April 27, 2023Date of Patent: April 9, 2024Assignee: TDK CORPORATIONInventors: Tsuyoshi Umehara, Hayato Miyashita, Keisuke Uchida, Hiraku Hirabayashi
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Patent number: 11946989Abstract: A magnetic sensor device includes at least one magnetic sensor and a support. A center of gravity of an element layout area of the at least one magnetic sensor is deviated from a center of gravity of a reference plane of the support. The at least one magnetic sensor includes four resistor sections constituted by a plurality of magnetoresistive elements. Magnetization of a free layer in each of two of the resistor sections includes a component in a third magnetization direction. The magnetization of a free layer in each of the other two resistor sections includes a component in a fourth magnetization direction opposite to the third magnetization direction.Type: GrantFiled: May 16, 2023Date of Patent: April 2, 2024Assignee: TDK CORPORATIONInventors: Norikazu Ota, Hiraku Hirabayashi, Kazuma Yamawaki, Shuhei Miyazaki, Kazuya Watanabe
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Patent number: 11914008Abstract: The magnetic sensor can prevent an increase of a positional detection error of a subject/object even in the case of applying an external magnetic field with a magnetic field intensity exceeding a predetermined range. A magnetic sensor is equipped with a magnetoresistive effect element (MR element) 11 that can detect an external magnetic field and a soft magnetic body shield 12. The soft magnetic body shield(s) 12 are/is positioned above and/or below the MR element 11 in a side view, and the size of the MR element 11 is physically included within a perimeter of the soft magnetic body shield 12.Type: GrantFiled: April 5, 2023Date of Patent: February 27, 2024Assignee: TDK CorporationInventors: Keisuke Uchida, Hiraku Hirabayashi
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Patent number: 11892478Abstract: A magnetic sensor device includes a first detection circuit that generates a first detection signal, a coil through which a feedback current is passed to generate a cancellation magnetic field, a second detection circuit that generates a second detection signal having a correspondence with a value of the feedback current, and a control circuit that controls the feedback current. In a closed-loop operation, the control circuit controls the feedback current so that the first detection signal has a constant value. In an open-loop operation, the control circuit maintains the feedback current at a constant value.Type: GrantFiled: February 17, 2023Date of Patent: February 6, 2024Assignee: TDK CORPORATIONInventors: Yuta Saito, Hiraku Hirabayashi
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Patent number: 11892477Abstract: A current sensor has: a magneto-resistive effect element which is arranged near a current line, to which a signal magnetic field is applied, the signal magnetic field being is induced by a current that flows in the current line, and which generates a magneto-resistive change in accordance with a change of the signal magnetic field; cancelling magnetic field generating means that is provided near the magneto-resistive effect element and that generates a cancelling magnetic field that cancels the signal magnetic field; a first soft magnetic body that is provided between the magneto-resistive effect element and the current line; and a pair of second soft magnetic bodies that are provided on both sides of the magneto-resistive effect element with regard to a magnetization detecting direction of the magneto-resistive effect element.Type: GrantFiled: March 4, 2022Date of Patent: February 6, 2024Assignee: TDK CorporationInventors: Yuta Saito, Kenichi Takano, Hiraku Hirabayashi
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Patent number: 11892527Abstract: A magnetic sensor includes a substrate including a top surface; an insulating layer disposed on the substrate, the insulating layer including first and second inclined surfaces each inclined with respect to the top surface of the substrate; and an MR element. The MR element is disposed on the first inclined surface or the second inclined surface. The MR element includes a first side surface including a first portion and a second portion, the first portion and the second portion having different angles with respect to the first inclined surface or the second inclined surface.Type: GrantFiled: September 19, 2022Date of Patent: February 6, 2024Assignee: TDK CORPORATIONInventors: Hidekazu Kojima, Kenzo Makino, Hiraku Hirabayashi
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Publication number: 20240027545Abstract: 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.Type: ApplicationFiled: October 5, 2023Publication date: January 25, 2024Applicant: TDK CORPORATIONInventors: Masaki NAGATA, Kazuya WATANABE, Keisuke UCHIDA, Kohei HONMA, Hiraku HIRABAYASHI
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Publication number: 20230402352Abstract: A lead frame includes a die pad, a plurality of leads, and a frame member. The frame member includes a first connection bar extending in a first direction and a second connection bar extending in a second direction. The die pad is connected to the second connection bar. The plurality of leads include a plurality of first leads connected to the first connection bar and a plurality of second leads connected to the second connection bar. The number of the plurality of second leads is smaller than the number of the plurality of first leads. Each of the plurality of second leads is connected to one corresponding first lead of the plurality of first leads.Type: ApplicationFiled: May 17, 2023Publication date: December 14, 2023Applicant: TDK CORPORATIONInventors: Kazuma YAMAWAKI, Hiraku HIRABAYASHI
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Publication number: 20230358828Abstract: At a reference position within a first plane, a magnetic field to be detected has a first direction that changes within the first plane. A magnetic sensor includes an MR element. The MR element includes a magnetic layer having first magnetization that can change in direction within a second plane. The first plane and the second plane intersect at a dihedral angle ? other than 90°. The magnetic field to be detected can be divided into an in-plane component parallel to the second plane and a perpendicular component perpendicular to the second plane. The in-plane component has a second direction that changes with a change in the first direction. The direction of the first magnetization changes with a change in the second direction. A detection value depends on the direction of the first magnetization.Type: ApplicationFiled: July 18, 2023Publication date: November 9, 2023Applicant: TDK CORPORATIONInventors: Shunji SARUKI, Hiraku HIRABAYASHI, Masanori SAKAI
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Patent number: 11808825Abstract: 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.Type: GrantFiled: April 18, 2022Date of Patent: November 7, 2023Assignee: TDK CORPORATIONInventors: Masaki Nagata, Kazuya Watanabe, Keisuke Uchida, Kohei Honma, Hiraku Hirabayashi
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Patent number: 11754647Abstract: At a reference position within a first plane, a magnetic field to be detected has a first direction that changes within the first plane. A magnetic sensor includes an MR element. The MR element includes a magnetic layer having first magnetization that can change in direction within a second plane. The first plane and the second plane intersect at a dihedral angle ? other than 90°. The magnetic field to be detected can be divided into an in-plane component parallel to the second plane and a perpendicular component perpendicular to the second plane. The in-plane component has a second direction that changes with a change in the first direction. The direction of the first magnetization changes with a change in the second direction. A detection value depends on the direction of the first magnetization.Type: GrantFiled: June 9, 2022Date of Patent: September 12, 2023Assignee: TDK CORPORATIONInventors: Shunji Saruki, Hiraku Hirabayashi, Masanori Sakai
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Publication number: 20230280420Abstract: A magnetic sensor device includes at least one magnetic sensor and a support. A center of gravity of an element layout area of the at least one magnetic sensor is deviated from a center of gravity of a reference plane of the support. The at least one magnetic sensor includes four resistor sections constituted by a plurality of magnetoresistive elements. Magnetization of a free layer in each of two of the resistor sections includes a component in a third magnetization direction. The magnetization of a free layer in each of the other two resistor sections includes a component in a fourth magnetization direction opposite to the third magnetization direction.Type: ApplicationFiled: May 16, 2023Publication date: September 7, 2023Applicant: TDK CORPORATIONInventors: Norikazu OTA, Hiraku HIRABAYASHI, Kazuma YAMAWAKI, Shuhei MIYAZAKI, Kazuya WATANABE
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Publication number: 20230258473Abstract: A position detection device includes a first position detector, a second position detector, and a signal generator. The first position detector includes a first magnetic field generation unit, a second magnetic field generation unit, and a first magnetic sensor. The second position detector includes a third magnetic field generation unit, a fourth magnetic field generation unit, and a second magnetic sensor. The positions of the second and fourth magnetic field generation units vary in response to variations in a detection-target position. The signal generator generates a position detection signal, which is the sum of a first detection signal generated by the first magnetic sensor and a second detection signal generated by the second magnetic sensor. Each of the first and second position detectors includes a bias magnetic field generation unit.Type: ApplicationFiled: April 27, 2023Publication date: August 17, 2023Applicant: TDK CORPORATIONInventors: Tsuyoshi UMEHARA, Hayato MIYASHITA, Keisuke UCHIDA, Hiraku HIRABAYASHI
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Publication number: 20230251333Abstract: The magnetic sensor can prevent an increase of a positional detection error of a subject/object even in the case of applying an external magnetic field with a magnetic field intensity exceeding a predetermined range. A magnetic sensor is equipped with a magnetoresistive effect element (MR element) 11 that can detect an external magnetic field and a soft magnetic body shield 12. The soft magnetic body shield(s) 12 are/is positioned above and/or below the MR element 11 in a side view, and the size of the MR element 11 is physically included within a perimeter of the soft magnetic body shield 12.Type: ApplicationFiled: April 5, 2023Publication date: August 10, 2023Inventors: Keisuke UCHIDA, Hiraku HIRABAYASHI
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Publication number: 20230251331Abstract: This sensor unit includes a base having a substantially-rectangular planar shape including a first side and a second side that are substantially orthogonal to each other, and a plurality of first sensors provided on the base and arranged on a first axis. The first axis is substantially parallel to the first side and passes through a center position of the base.Type: ApplicationFiled: March 8, 2023Publication date: August 10, 2023Applicant: TDK CorporationInventors: Kunihiro Ueda, Yoshimitsu Wada, Hiraku Hirabayashi, Kazuma Yamawaki, Tsuyoshi Umehara
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Publication number: 20230243899Abstract: A magnetic sensor includes a magnetic sensor chip that includes a magnetoresistive effect element and a sealed part. The magnetoresistive effect element includes a free layer and a pinned layer. The sealed part has a first surface and a second surface, which is opposite the first surface. The shape of the sealed part in the plan view from the first surface side is substantially quadrilateral. The substantially quadrilateral shape has a first side and a second side, which are substantially parallel to each other. In the plan view, from the first surface side of the sealed part, the magnetization direction of the pinned layer, in a state in which the external magnetic field is not applied on the magnetoresistive effect element, is inclined with respect to an approximately straight line found through the least squares method using a plurality of points arbitrarily set on the first side.Type: ApplicationFiled: April 12, 2023Publication date: August 3, 2023Inventors: Yuta SAITO, Hiraku HIRABAYASHI, Yoshihiro KUDO