-
公开(公告)号：US11994566B2
公开(公告)日：2024-05-28
申请号：US18091475
申请日：2022-12-30
Applicant: TDK CORPORATION
Inventor： Kenzo Makino , Takafumi Kobayashi
Abstract: A magnetic sensor includes an MR element and a support member. A top surface of the support member includes an inclined portion. The MR element includes an MR element main body, a lower electrode, and an upper electrode. The lower electrode includes a first end closest to a lower end of the inclined portion and a second end closest to an upper end of the inclined portion. The MR element main body is located at a position closer to the second end than to the first end.
-
公开(公告)号：US12158510B2
公开(公告)日：2024-12-03
申请号：US18161964
申请日：2023-01-31
Applicant: TDK Corporation
Inventor： Tsuyoshi Umehara , Kentaro Harada , Takafumi Kobayashi
Abstract: A method of designing a magnetic sensor that can easily accommodate various design conditions is provided. The method has: preparing magnetic sensors, wherein, for each magnetic sensor, magnetization directions of the first to fourth magnetically pinned layers form first to fourth angles θ1 to θ4 relative to a specific reference angle, respectively, and θ1=θ3, θ2=θ4, θ1≠θ2, and each magnetic sensor has a value of θ1−θ2 that is different from values of θ1−θ2 of remaining magnetic sensors, for each magnetic sensor, obtaining a relationship between an angular range of the magnetization direction of the first to fourth magnetically free layers and an output range of the magnetic sensor, wherein the angular range satisfies a specific linear relationship between the magnetization direction and the output of the magnetic sensor, and selecting a magnetic sensor that satisfies required conditions for the angular range and the output range from among the magnetic sensors.
-
公开(公告)号：US20240272248A1
公开(公告)日：2024-08-15
申请号：US18642004
申请日：2024-04-22
Applicant: TDK CORPORATION
Inventor： Kenzo MAKINO , Takafumi Kobayashi
Abstract: A magnetic sensor includes an MR element and a support member. A top surface of the support member includes an inclined portion. The MR element includes an MR element main body, a lower electrode, and an upper electrode. The lower electrode includes a first end closest to a lower end of the inclined portion and a second end closest to an upper end of the inclined portion. The MR element main body is located at a position closer to the second end than to the first end.
-
公开(公告)号：US11885835B2
公开(公告)日：2024-01-30
申请号：US17866859
申请日：2022-07-18
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 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.
-
公开(公告)号：US11598827B2
公开(公告)日：2023-03-07
申请号：US17543951
申请日：2021-12-07
Applicant: TDK Corporation
Inventor： Tsuyoshi Umehara , Kentaro Harada , Takafumi Kobayashi
Abstract: A method of designing a magnetic sensor that can easily accommodate various design conditions is provided. The method has: preparing magnetic sensors, wherein, for each magnetic sensor, magnetization directions of the first to fourth magnetically pinned layers form first to fourth angles θ1 to θ4 relative to a specific reference angle, respectively, and θ1=θ3, θ2=θ4, θ1≠θ2, and each magnetic sensor has a value of θ1-θ2 that is different from values of 01-02 of remaining magnetic sensors, for each magnetic sensor, obtaining a relationship between an angular range of the magnetization direction of the first to fourth magnetically free layers and an output range of the magnetic sensor, wherein the angular range satisfies a specific linear relationship between the magnetization direction and the output of the magnetic sensor, and selecting a magnetic sensor that satisfies required conditions for the angular range and the output range from among the magnetic sensors.
-
Patent Agency Ranking
公开(公告)号：US11422166B2
公开(公告)日：2022-08-23
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.
-
公开(公告)号：US12092705B2
公开(公告)日：2024-09-17
申请号：US18354909
申请日：2023-07-19
Applicant: TDK Corporation
Inventor： Takafumi Kobayashi
IPC: G01R33/09 , G01R33/00 , G01R33/421
CPC classification number: G01R33/093 , G01R33/0023 , G01R33/4215
Abstract: A magnetic sensor includes a magnetic field conversion unit that outputs an output magnetic field, a magnetic field detection unit that the output magnetic field can be applied, and a magnetic shield that shields external magnetic fields. The length of the magnetic field conversion unit in the third direction is greater than the length in the second direction. The magnetic shield overlaps the magnetic field conversion unit and the magnetic field detection unit. The magnetic field detection unit includes a Wheatstone bridge circuit in which a first bridge circuit including first and second magnetic field detection units and a second bridge circuit including third and fourth magnetic field detection units are connected in parallel. The first through fourth magnetic field detection units include two magnetoresistive units, and two of the magnetoresistive units have magnetoresistive effect elements that include magnetization fixed layers whose magnetization directions differ from each other.
-
8.发明授权公开(公告)号：US09293165B2
公开(公告)日：2016-03-22
申请号：US14204020
申请日：2014-03-11
Applicant: TDK Corporation
Inventor： Susumu Aoki , Takafumi Kobayashi , Ryo Hosoi , Kei Hirata
CPC classification number: G11B5/6088 , G11B5/11 , G11B5/1278 , G11B5/187 , G11B5/314 , G11B2005/0021
Abstract: A recording head has a near field light (NF light) generator generating NF light on a generator end surface that irradiates a magnetic recording (MR) medium; a main magnetic pole including a pole end surface facing an air bearing surface (ABS) that emits magnetic flux to the MR medium from the pole end surface; and a return shield having a shield end surface facing the ABS, that is magnetically linked with the main magnetic pole, and absorbs magnetic flux from the MR medium at the shield end surface. The pole end surface and the shield end surface are on the same side of the generator end surface in the down track direction, and are close to each other in the track crossing direction. A center line in the down track direction of the generator end surface extends between opposing sides of the pole end surface and the shield end surface.
Abstract translation: 记录头具有在发生磁记录介质的发生器端面产生NF光的近场光（NF光）发生器; 主磁极，包括面向从极端表面向MR介质发射磁通的空气轴承表面（ABS）的极端表面; 以及具有面向ABS的屏蔽端面的返回屏蔽件，其与主磁极磁连接，并且在屏蔽端表面处吸收来自MR介质的磁通量。 磁极端面和屏蔽端面在下行轨道方向上位于发电机端面的同一侧，并且在轨道交叉方向上彼此靠近。 发电机端面的向下方向的中心线在极端面和屏蔽端面的相对侧面之间延伸。
-
公开(公告)号：US11747409B2
公开(公告)日：2023-09-05
申请号：US17552994
申请日：2021-12-16
Applicant: TDK Corporation
Inventor： Takafumi Kobayashi
IPC: G01R33/09 , G01R33/00 , G01R33/421
CPC classification number: G01R33/093 , G01R33/0023 , G01R33/4215
Abstract: A magnetic sensor includes a magnetic field conversion unit that outputs an output magnetic field, a magnetic field detection unit that the output magnetic field can be applied, and a magnetic shield that shields external magnetic fields. The length of the magnetic field conversion unit in the third direction is greater than the length in the second direction. The magnetic shield overlaps the magnetic field conversion unit and the magnetic field detection unit. The magnetic field detection unit includes a Wheatstone bridge circuit in which a first bridge circuit including first and second magnetic field detection units and a second bridge circuit including third and fourth magnetic field detection units are connected in parallel. The first through fourth magnetic field detection units include two magnetoresistive units, and two of the magnetoresistive units have magnetoresistive effect elements that include magnetization fixed layers whose magnetization directions differ from each other.
-
公开(公告)号：US11573276B2
公开(公告)日：2023-02-07
申请号：US17131142
申请日：2020-12-22
Applicant: TDK CORPORATION
Inventor： Kenzo Makino , Takafumi Kobayashi
Abstract: A magnetic sensor includes an MR element and a support member. A top surface of the support member includes an inclined portion. The MR element includes an MR element main body, a lower electrode, and an upper electrode. The lower electrode includes a first end closest to a lower end of the inclined portion and a second end closest to an upper end of the inclined portion. The MR element main body is located at a position closer to the second end than to the first end.
-
-
-
-
-
-
-
-
-
Search Results
14
records
(took 0.014 seconds)
