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公开(公告)号：US20230088756A1
公开(公告)日：2023-03-23
申请号：US17948429
申请日：2022-09-20
Applicant: TDK CORPORATION
Inventor： Norikazu OTA , Shinichirou MOCHIZUKI , Kazuya WATANABE , Hiraku HIRABAYASHI
Abstract: A magnetic sensor device includes a first detection circuit, a second detection circuit, and a processor. The processor is configured to execute first generation processing for generating a first initial detection value, second generation processing for generating a second initial detection value, first correction processing, second correction processing, and determination processing. The first correction processing is processing for correcting the first initial detection value and updating the first initial detection value. The second correction processing is processing for correcting the second initial detection value and updating the second initial detection value. The processor executes the determination processing after alternately executing the first correction processing and the second correction processing.
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公开(公告)号：US20220373620A1
公开(公告)日：2022-11-24
申请号：US17881666
申请日：2022-08-05
Applicant: TDK CORPORATION
Inventor： Kenzo MAKINO , Norikazu OTA
IPC: G01R33/09
Abstract: A magnetic sensor includes at least one MR element and a coil. The coil includes at least one conductor portion. The at least one conductor portion is each located at a position such that a partial magnetic field generated by the conductor portion is applied to one of the at least one MR element, the one corresponding to the conductor portion, and extends along an imaginary curve curving to protrude in a direction away from the corresponding MR element.
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公开(公告)号：US20210293857A1
公开(公告)日：2021-09-23
申请号：US17187966
申请日：2021-03-01
Applicant: TDK CORPORATION
Inventor： Takafumi KOBAYASHI , Norikazu OTA , Kenzo MAKINO
Abstract: A magnetic field detection apparatus includes a magnetoresistive effect element and a coil. The coil includes first and second tier parts opposed to each other in a first axis direction, with the magnetoresistive effect element interposed therebetween. The coil is configured to be supplied with a current and thereby configured to generate an induction magnetic field to be applied to the magnetoresistive effect element in a second axis direction. The first tier part includes first conductors extending in a third axis direction, arranged in the second axis direction and coupled in parallel to each other. The second tier part includes a second conductor or second conductors extending in the third axis direction, the second conductors being arranged in the second axis direction and coupled in parallel to each other. The first conductors each have a width smaller than a width of the second conductor or each of the second conductors.
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公开(公告)号：US20210181240A1
公开(公告)日：2021-06-17
申请号：US17080958
申请日：2020-10-27
Applicant: TDK CORPORATION
Inventor： Norikazu OTA , Kenzo MAKINO , Hiraku HIRABAYASHI
Abstract: A magnetic field detection apparatus includes a magnetoresistive effect element and a helical coil. The magnetoresistive effect element includes a magnetoresistive effect film extending in a first axis direction. The helical coil includes a parallel connection including first and second parts extending in a second axis direction inclined with respect to the first axis direction. The first and second parts are adjacent to each other in a third axis direction and coupled to each other in parallel. The helical coil is wound around the magnetoresistive effect element while extending along the third axis direction. The magnetoresistive effect film overlaps the first and second parts in a fourth axis direction orthogonal to the second and third axis directions. The helical coil 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 the third axis direction.
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15.发明申请公开(公告)号：US20140160597A1
公开(公告)日：2014-06-12
申请号：US13708507
申请日：2012-12-07
Applicant: TDK CORPORATION
Inventor： Norikazu OTA , Masahiro SAITO , Taro OIKE , Takeo KAGAMI , Yosuke ANTOKU , Kenkichi ANAGAWA , Kenta HARA , Tetsuro SASAKI , Shingo MIYATA , Katsuki KURIHARA
IPC: G11B5/11
CPC classification number: G11B5/1278 , G11B5/3116 , G11B5/315
Abstract: A magnetic head includes a main pole, a write shield, and a return path section. The write shield includes first and second shield portions located on opposite sides of the main pole in the track width direction. The return path section includes first and second yoke portions located on opposite sides of the main pole in the track width direction. The first yoke portion is connected to the first shield portion. The second yoke portion is connected to the second shield portion. A coil surrounds at least part of the entire outer periphery of the main pole when viewed from a medium facing surface.
Abstract translation: 磁头包括主极，写屏蔽和返回路径部分。 写屏蔽包括位于主磁极在磁道宽度方向的相对侧上的第一和第二屏蔽部分。 返回路径部分包括在轨道宽度方向上位于主极的相对侧上的第一和第二轭部分。 第一磁轭部分连接到第一屏蔽部分。 第二磁轭部分连接到第二屏蔽部分。 当从面向介质的表面观察时，线圈围绕主极的整个外周的至少一部分。
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Patent Agency Ranking
公开(公告)号：US20250085362A1
公开(公告)日：2025-03-13
申请号：US18958211
申请日：2024-11-25
Applicant: TDK Corporation
Inventor： Norikazu OTA , Shinichirou MOCHIZUKI , Kazuya WATANABE , Hiraku HIRABAYASHI
Abstract: A magnetic sensor device includes a first detection circuit, a second detection circuit, and a processor. The processor is configured to execute first generation processing for generating a first initial detection value, second generation processing for generating a second initial detection value, first correction processing, second correction processing, and determination processing. The first correction processing is processing for correcting the first initial detection value and updating the first initial detection value. The second correction processing is processing for correcting the second initial detection value and updating the second initial detection value. The processor executes the determination processing after alternately executing the first correction processing and the second correction processing.
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公开(公告)号：US20240280652A1
公开(公告)日：2024-08-22
申请号：US18591026
申请日：2024-02-29
Applicant: TDK CORPORATION
Inventor： Norikazu OTA , Hiraku HIRABAYASHI , Kazuma YAMAWAKI , Shuhei MIYAZAKI , Kazuya WATANABE
CPC classification number: G01R33/098 , G01R33/0206 , G01R33/093
Abstract: 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 auxiliary resistor sections constituted by a plurality of magnetoresistive elements. The element layout area includes first to fourth areas for laying out the four auxiliary resistor sections, respectively. Two of the first to fourth areas are arranged so that at least parts of the respective two areas sandwich a reference axis therebetween, and other two of the first to fourth areas are arranged so that at least parts of the respective other two areas sandwich the reference axis therebetween.
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公开(公告)号：US20240210446A1
公开(公告)日：2024-06-27
申请号：US18602201
申请日：2024-03-12
Applicant: TDK CORPORATION
Inventor： Norikazu OTA , Kenzo MAKINO , Hiraku HIRABAYASHI
CPC classification number: G01R15/205 , G01R19/0092 , G01R33/091 , H01C7/00 , H01F7/064 , H01F27/28
Abstract: 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.
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公开(公告)号：US20240201286A1
公开(公告)日：2024-06-20
申请号：US18536387
申请日：2023-12-12
Applicant: TDK CORPORATION
Inventor： Norikazu OTA , Hiraku HIRABAYASHI
CPC classification number: G01R33/09 , G01R15/205 , G01R19/0092
Abstract: A magnetic sensor includes an insulating layer having a first inclined surface, a plurality of first MR elements disposed on the first inclined surface, and a plurality of first magnetic field generators disposed on the first inclined surface and configured to generate a magnetic field to be applied to the plurality of first MR elements. Each of the plurality of first magnetic field generators includes a ferromagnetic material section and an antiferromagnetic material section. The ferromagnetic material section and the antiferromagnetic material section are stacked in a direction intersecting the first inclined surface.
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公开(公告)号：US20240192292A1
公开(公告)日：2024-06-13
申请号：US18582155
申请日：2024-02-20
Applicant: TDK Corporation
Inventor： Kenzo MAKINO , Norikazu OTA
CPC classification number: G01R33/098 , G01R33/096 , H01F7/20 , H01C7/00
Abstract: A magnetic sensor includes at least one MR element and a coil. The coil includes at least one conductor portion. The at least one conductor portion is each located at a position such that a partial magnetic field generated by the conductor portion is applied to one of the at least one MR element, the one corresponding to the conductor portion, and extends along an imaginary curve curving to protrude in a direction away from the corresponding MR element.
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