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公开(公告)号：US20220349921A1
公开(公告)日：2022-11-03
申请号：US17866859
申请日：2022-07-18
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 dal 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 conductor 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：US20210181241A1
公开(公告)日：2021-06-17
申请号：US17081232
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 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：US20230087727A1
公开(公告)日：2023-03-23
申请号：US17949557
申请日：2022-09-21
Applicant: TDK CORPORATION
Inventor： Takehiro ISODA , Norikazu OTA , Daichi TAKANO , Kenji INAGE
Abstract: A magnetic sensor includes a plurality of resistor sections each including a plurality of MR elements, and a plurality of protruding surfaces each structured to cause the plurality of MR elements to detect a specific component of a target magnetic field. The plurality of MR elements are disposed dividedly in first to fourth areas corresponding respectively to the plurality of resistor sections. The plurality of protruding surfaces include a structural body extending across at least two of the first to fourth areas.
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公开(公告)号：US20230008088A1
公开(公告)日：2023-01-12
申请号：US17734674
申请日：2022-05-02
Applicant: TDK CORPORATION
Inventor： Norikazu OTA , Hiraku HIRABAYASHI , Kazuma YAMAWAKI , Shuhei MIYAZAKI , Kazuya WATANABE
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 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.
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公开(公告)号：US20220308095A1
公开(公告)日：2022-09-29
申请号：US17825702
申请日：2022-05-26
Applicant: TDK CORPORATION
Inventor： Norikazu OTA , Kenzo MAKINO , Hiraku HIRABAYASHI
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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Patent Agency Ranking
公开(公告)号：US20160019922A1
公开(公告)日：2016-01-21
申请号：US14335984
申请日：2014-07-21
Applicant: TDK CORPORATION
Inventor： Norikazu OTA , Osamu NAKADA , Mitsuo OTSUKI , Shinji HARA , Daisuke MIYAUCHI , Tetsuya ROPPONGI , Koji SHIMAZAWA
IPC: G11B5/60
CPC classification number: G11B5/607 , G11B5/6011 , G11B5/6029 , G11B5/6052 , G11B5/6076 , G11B5/6088 , G11B2005/0021
Abstract: While a plurality of drive currents for flying height setting with current values smaller than a tentative optimum drive current are supplied to a light source, respectively, heater power is supplied to a heater part, and touch down of a thermally-assisted magnetic recording head is detected. Tentative optimum heater power is determined based on a correlation between the heater power when the touch down is detected and each drive current for flying height setting. The tentative optimum drive current is supplied to the light source part; the tentative optimum heater power is supplied to the heater part; a reference signal is recorded in a magnetic recording medium; and flying height of the thermally-assisted magnetic recording head is set by determining whether or not the reference signal is recorded with the desired signal intensity.
Abstract translation: 虽然分别将用于飞行高度设定的多个驱动电流设置为具有小于暂定最佳驱动电流的电流值，但是分别将加热器电力提供给加热器部分，并且热辅助磁记录头的向下触摸 检测到。 基于检测到触摸时的加热器功率与用于飞行高度设置的每个驱动电流之间的相关性来确定暂定最佳加热器功率。 暂定最佳驱动电流被提供给光源部分; 将暂定的最佳加热器功率提供给加热器部件; 参考信号被记录在磁记录介质中; 并且通过确定参考信号是否以期望的信号强度被记录来设定热辅助磁记录头的飞行高度。
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公开(公告)号：US20150294678A1
公开(公告)日：2015-10-15
申请号：US14250522
申请日：2014-04-11
Applicant: TDK Corporation
Inventor： Shinji HARA , Eiji KOMURA , Norikazu OTA , Daisuke MIYAUCHI , Tetsuya ROPPONGI , Koji SHIMAZAWA
CPC classification number: G11B13/08 , G11B5/3106 , G11B5/314 , G11B5/3163 , G11B5/6076 , G11B5/6082 , G11B5/6088 , G11B7/1387 , G11B2005/0021
Abstract: A thermal assisted magnetic recording head has a magnetic head slider having an air bearing surface that is opposite to a magnetic recording medium, a core that can propagate laser light as propagating light, a plasmon generator that includes a generator front end surface facing the air bearing surface, and a main pole facing the air bearing surface, and a laser light generator that supplies the laser light to the core. The plasmon generator generates near-field light (NF light) at the generator front end surface to heat the magnetic recording medium. The main pole includes a main pole end surface that faces the air bearing surface and that is positioned in the vicinity of the generator front end surface, and emits a magnetic flux to the magnetic recording medium from the main pole end surface. At least a portion of the laser light that is not coupled with the plasmon generator thermally deforms the air bearing surface so that a part of the air bearing surface positioned closer to the leading side than the generator front end surface and the main pole end surface in the down track direction protrudes toward the magnetic recording medium.
Abstract translation: 热辅助磁记录头具有磁头滑块，其具有与磁记录介质相反的空气轴承表面，可以传播激光作为传播光的芯，等离子体激元发生器，其包括面向空气轴承的发生器前端表面 表面和面向空气轴承表面的主极;以及激光发生器，其将激光供应到芯。 等离子体发生器在发生器前端表面产生近场光（NF光），以加热磁记录介质。 主极包括面向空气轴承表面并且位于发生器前端表面附近的主极端面，并且从主极端面向磁记录介质发射磁通量。 不与等离子体发生器耦合的激光的至少一部分使空气轴承表面发生热变形，使得空气轴承表面的一部分比发生器前端表面和主极端表面更靠近前端 向下轨道方向朝向磁记录介质突出。
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公开(公告)号：US20140098441A1
公开(公告)日：2014-04-10
申请号：US13644903
申请日：2012-10-04
Applicant: TDK CORPORATION
Inventor： Masahiro SAITO , Norikazu OTA , Hiromichi UMEHARA , Masachika HASHINO
IPC: G11B5/147
CPC classification number: G11B5/147 , G11B5/1278 , G11B5/3116
Abstract: A perpendicular magnetic write head includes: a magnetic pole having an end surface exposed on an air bearing surface, and extending in a height direction perpendicular to the air bearing surface; a first yoke having an end surface exposed on the air bearing surface, and facing a forward section of the magnetic pole with a gap layer in between; a second yoke located behind the first yoke with an insulating layer in between in the height direction, and connected to a backward section of the magnetic pole; a shield connecting the first yoke to the second yoke; and an additional magnetic layer located behind a boundary between the first yoke and the insulating layer, and in contact with the first yoke.
Abstract translation: 垂直磁性写头包括：磁极，具有暴露在空气轴承表面上的端面，并且在垂直于空气轴承表面的高度方向上延伸; 第一磁轭，其端面暴露在空气轴承表面上，并且面对具有间隙层的磁极的前部; 位于第一磁轭后面的第二磁轭，其在高度方向之间具有绝缘层，并且连接到磁极的后部; 连接第一磁轭和第二磁轭的屏蔽件; 以及位于第一磁轭和绝缘层之间的边界后面并与第一磁轭接触的附加磁性层。
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公开(公告)号：US20240310460A1
公开(公告)日：2024-09-19
申请号：US18541031
申请日：2023-12-15
Applicant: TDK CORPORATION
Inventor： Takehiro ISODA , Norikazu OTA , Kazuya WATANABE , Hiraku HIRABAYASHI
CPC classification number: G01R33/091 , G01R33/093 , H10N50/01 , H10N50/10 , H10N50/80
Abstract: A magnetic sensor includes a soft magnetic body having a first end surface and a second end surface located on opposite sides, a first MR element located near the first end surface, a second MR element located near the second end surface, and a first lead that electrically connects the first MR element and the second MR element and includes a portion overlapping the soft magnetic body when observed in a second direction orthogonal to a first direction in which the first and second MR elements are arranged.
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公开(公告)号：US20240110951A1
公开(公告)日：2024-04-04
申请号：US18538546
申请日：2023-12-13
Applicant: TDK CORPORATION
Inventor： Takafumi KOBAYASHI , Norikazu OTA , Kenzo MAKINO
CPC classification number: G01R15/205 , G01R19/0092 , G01R33/09
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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