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公开(公告)号：US20160293188A1
公开(公告)日：2016-10-06
申请号：US14753301
申请日：2015-06-29
Applicant: TDK Corporation
Inventor： Naomichi DEGAWA , Kenzo MAKINO , Satoshi MIURA , Takayasu KANAYA
CPC classification number: G11B5/3912 , G01R33/098 , G11B5/3932 , G11B2005/3996
Abstract: A magneto-resistive effect element (MR element) has a first shield layer; a second shield layer; an inner shield layer that is positioned between the first shield layer and the second shield layer, and that makes contact with the first shield layer and faces the air bearing surface (ABS); and a multilayer film that is positioned between the first shield layer and the second shield layer. The multilayer film has a free layer; a first pinned layer; a nonmagnetic spacer layer; a second pinned layer that fixes the magnetization direction of the first pinned layer; and an antiferromagnetic layer that is exchange-coupled with the second pinned layer. The antiferromagnetic layer faces the back surface of the inner shield layer viewed from the ABS. The MR element has an insulating layer positioned between the antiferromagnetic layer and the inner shield layer.
Abstract translation: 磁阻效应元件（MR元件）具有第一屏蔽层; 第二屏蔽层; 位于所述第一屏蔽层和所述第二屏蔽层之间并且与所述第一屏蔽层接触并面向所述空气轴承表面（ABS）的内屏蔽层; 以及位于所述第一屏蔽层和所述第二屏蔽层之间的多层膜。 多层膜具有自由层; 第一个固定层; 非磁性间隔层; 固定所述第一固定层的磁化方向的第二固定层; 以及与第二被钉扎层交换耦合的反铁磁层。 反铁磁层面对从ABS观察的内屏蔽层的后表面。 MR元件具有位于反铁磁层和内屏蔽层之间的绝缘层。
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公开(公告)号：US20240241192A1
公开(公告)日：2024-07-18
申请号：US18620102
申请日：2024-03-28
Applicant: TDK CORPORATION
Inventor： Hiromichi UMEHARA , Kenzo MAKINO , Masachika HASHINO
CPC classification number: G01R33/093 , G01R33/0047
Abstract: A magnetic sensor includes an insulating layer including a protruding surface, a first MR element, and a second MR element. The protruding surface includes a first curved surface portion. The first curved surface portion includes a first portion including an upper end portion of the protruding surface, and a second portion continuous with the first portion at a position away from the upper end portion of the protruding surface. When the shape of the protruding surface is regarded as a function Z, the mean value of the absolute value of a second derivative Z″ of the function Z corresponding to the first portion is smaller than the mean value of the absolute value of the second derivative Z″ of the function Z corresponding to the second portion.
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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：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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公开(公告)号：US20230417846A1
公开(公告)日：2023-12-28
申请号：US18243392
申请日：2023-09-07
Applicant: TDK CORPORATION
Inventor： Kenzo MAKINO , Shuhei MIYAZAKI
IPC: G01R33/02
CPC classification number: G01R33/0206
Abstract: A magnetic sensor device includes a first chip including a first magnetic sensor, a second chip including a second magnetic sensor and a third magnetic sensor, and a support having a reference plane. The first magnetic sensor includes at least one first magnetic detection element, and detects a first component of an external magnetic field. The second magnetic sensor includes at least one second magnetic detection element, and detects a second component of the external magnetic field. The third magnetic sensor includes at least one third magnetic detection element, and detects a third component of the external magnetic field. The first chip and the second chip are mounted on the reference plane.
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Patent Agency Ranking
公开(公告)号：US20230099490A1
公开(公告)日：2023-03-30
申请号：US18077285
申请日：2022-12-08
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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公开(公告)号：US20230089851A1
公开(公告)日：2023-03-23
申请号：US17947243
申请日：2022-09-19
Applicant: TDK CORPORATION
Inventor： Kazuya WATANABE , Kenzo MAKINO
Abstract: A magnetic sensor includes a substrate including a top surface, an insulating layer including an inclined surface, and a magnetic detection element disposed on the inclined surface. The magnetic detection element includes a first side surface and a second side surface. The first side surface is located at a position forward in a first direction that is one direction along the inclined surface. The second side surface is located at a position forward in a second direction that is another direction along the inclined surface. The magnetic detection element includes a first non-constant portion in which a gap between an upper end of the first side surface and an upper end of the second side surface becomes smaller along the longitudinal direction of the magnetic detection element.
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公开(公告)号：US20230086267A1
公开(公告)日：2023-03-23
申请号：US17945397
申请日：2022-09-15
Applicant: TDK CORPORATION
Inventor： Hiromichi UMEHARA , Keita KAWAMORI , Kenzo MAKINO , Masachika HASHINO
Abstract: A magnetic sensor includes an insulating layer, a first MR element, and a second MR element. The insulating layer includes a first layer and a second layer, and also includes first and second inclined surfaces formed across the first layer and the second layer. Each of the first and second MR elements includes a magnetization pinned layer and a free layer. The magnetization pinned layer and the free layer of the first MR element are disposed on the first inclined surface. The magnetization pinned layer and the free layer of the second MR element are disposed on the second inclined surface.
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公开(公告)号：US20220026507A1
公开(公告)日：2022-01-27
申请号：US17360804
申请日：2021-06-28
Applicant: TDK CORPORATION
Inventor： Kenzo MAKINO
Abstract: A magnetic sensor includes first to fourth resistor sections and a plurality of MR elements. Each of the plurality of MR elements belongs to any of first to fourth groups. The first to fourth groups are defined based on the areas of top surfaces of the MR elements. The first resistor section, the second resistor section, the third resistor section, and the fourth resistor section are constituted of the first group, the second group, the third group, and the fourth group, respectively; the second group, the first group, the fourth group, and the third group, respectively; the first group, the fourth group, the third group, and the second group, respectively; or the third group, the second group, the first group, and the fourth group, respectively.
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公开(公告)号：US20210302511A1
公开(公告)日：2021-09-30
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.
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