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公开(公告)号：US20180292472A1
公开(公告)日：2018-10-11
申请号：US15908066
申请日：2018-02-28
Applicant: TDK CORPORATION
Inventor： Kenzo MAKINO , Suguru WATANABE , Yasushi NISHIOKA , Hirokazu TAKAHASHI
Abstract: A magneto-resistive effect element includes a magnetization free layer, an intermediate layer, and a magnetization pinned layer. The magnetization free layer extends along a first plane. The intermediate layer extends along the first plane, and is stacked on the magnetization free layer. The magnetization pinned layer extends along the first plane, and is provided on side opposite to the magnetization free layer with the intermediate layer being interposed therebetween. Here, the magnetization free layer includes an end surface that has a maximum inclination angle of 42° or less relative to the first plane.
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公开(公告)号：US20200300942A1
公开(公告)日：2020-09-24
申请号：US16896284
申请日：2020-06-09
Applicant: TDK CORPORATION
Inventor： Kenzo MAKINO , Suguru WATANABE , Yasushi NISHIOKA , Hirokazu TAKAHASHI
Abstract: A magneto-resistive effect element includes a magnetization free layer, an intermediate layer, and a magnetization pinned layer. The magnetization free layer extends along a first plane. The intermediate layer extends along the first plane, and is stacked on the magnetization free layer. The magnetization pinned layer extends along the first plane, and is provided on side opposite to the magnetization free layer with the intermediate layer being interposed therebetween. Here, the magnetization free layer includes an end surface that has a maximum inclination angle of 42° or less relative to the first plane.
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公开(公告)号：US20180364316A1
公开(公告)日：2018-12-20
申请号：US16049993
申请日：2018-07-31
Applicant: TDK Corporation
Inventor： Kunihiro UEDA , Yoshiyuki MIZOGUCHI , Hiroshi YAMAZAKI , Suguru WATANABE
CPC classification number: G01R33/09 , G01D5/2455 , G01R33/093 , G01R33/098
Abstract: A magnetic sensor is provided with first and second magnetoresistive effect elements that can detect an external magnetic field. The first and second magnetoresistive effect elements are a plurality of layers of multilayer body including free layers where their magnetization directions vary due to the external magnetic field. Shapes of the first and second magnetoresistive effect elements viewed from the upper side in the lamination direction are different from each other. The first magnetoresistive effect element has a shape that can increase a slope of an output of the first magnetoresistive effect element relative to the change of the external magnetic field. The second magnetoresistive effect element has a shape that can decrease a slope of an output of the second magnetoresistive effect element relative to the change of the external magnetic field compared to the slope of the output of the first magnetoresistive effect element.
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公开(公告)号：US20160282145A1
公开(公告)日：2016-09-29
申请号：US14996536
申请日：2016-01-15
Applicant: TDK Corporation
Inventor： Kunihiro UEDA , Yoshiyuki MIZOGUCHI , Hiroshi YAMAZAKI , Suguru WATANABE
CPC classification number: G01R33/09 , G01R1/00 , G01R33/0052 , G01R33/093 , H01L21/00 , H01L2221/00
Abstract: A magnetic sensor is provided with first and second magnetoresistive effect elements that can detect an external magnetic field. The first and second magnetoresistive effect elements include at least magnetization direction change layers where a direction of magnetization is changed according to an external magnetic field. The width W1 of a magnetization direction change layer in an initial magnetization direction of the magnetization direction change layer of the first magnetoresistive effect element, and the width W2 of a magnetization direction change layer in an initial magnetization direction of the magnetization direction change layer of the second magnetoresistive effect element have a relationship shown by formula (1) below. Sensitivity of the first magnetoresistive effect element to the external magnetic field is higher than that of the second magnetoresistive effect element. W1>W2 (1)
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Patent Agency Ranking
公开(公告)号：US20200348373A1
公开(公告)日：2020-11-05
申请号：US16916606
申请日：2020-06-30
Applicant: TDK Corporation
Inventor： Kunihiro UEDA , Yoshiyuki MIZOGUCHI , Hiroshi YAMAZAKI , Suguru WATANABE
IPC: G01R33/09
Abstract: A magnetic sensor is provided with first and second magnetoresistive effect elements that can detect an external magnetic field. The first and second magnetoresistive effect elements are a plurality of layers of multilayer body including free layers where their magnetization directions vary due to the external magnetic field. Shapes of the first and second magnetoresistive effect elements viewed from the upper side in the lamination direction are different from each other. The first magnetoresistive effect element has a shape that can increase a slope of an output of the first magnetoresistive effect element relative to the change of the external magnetic field. The second magnetoresistive effect element has a shape that can decrease a slope of an output of the second magnetoresistive effect element relative to the change of the external magnetic field compared to the slope of the output of the first magnetoresistive effect element.
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公开(公告)号：US20230408605A1
公开(公告)日：2023-12-21
申请号：US18240671
申请日：2023-08-31
Applicant: TDK CORPORATION
Inventor： Yoshiaki TANAKA , Tetsuya HIRAKI , Kazuya WATANABE , Suguru WATANABE
IPC: G01R33/09
CPC classification number: G01R33/093 , G01R33/098
Abstract: A magnetic field detection device includes a base, a first yoke, and a magneto-resistive effect element. The first yoke is provided on the base, and includes first and second principal surfaces each extending along a first plane, and a first end surface coupling the first and second principal surfaces. The magneto-resistive effect element is provided on the base, and includes a magnetization free layer disposed at a position overlapped with the first yoke in a first direction along the first plane. The first end surface includes an inverted tapered surface inclined relative to the first plane and extending closer to a center point of the magnetization free layer as being away from the base in a second direction orthogonal to the first plane. A distance from the center point to a first edge is shorter than a distance from the center point to a second edge.
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公开(公告)号：US20210333336A1
公开(公告)日：2021-10-28
申请号：US17366622
申请日：2021-07-02
Applicant: TDK CORPORATION
Inventor： Yoshiaki TANAKA , Tetsuya HIRAKI , Kazuya WATANABE , Suguru WATANABE
IPC: G01R33/09
Abstract: A magnetic field detection device includes a base, a first yoke, and a magneto-resistive effect element. The first yoke is provided on the base, and includes first and second principal surfaces each extending along a first plane, and a first end surface coupling the first and second principal surfaces. The magneto-resistive effect element is provided on the base, and includes a magnetization free layer disposed at a position overlapped with the first yoke in a first direction along the first plane. The first end surface includes an inverted tapered surface inclined relative to the first plane and extending closer to a center point of the magnetization free layer as being away from the base in a second direction orthogonal to the first plane. A distance from the center point to a first edge is shorter than a distance from the center point to a second edge.
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公开(公告)号：US20190086447A1
公开(公告)日：2019-03-21
申请号：US16101820
申请日：2018-08-13
Applicant: TDK CORPORATION
Inventor： Kenichi TAKANO , Yuta SAITO , Suguru WATANABE
Abstract: A current sensor includes a magnetic sensor device. The magnetic sensor device includes a magnetic sensor, a first magnetic layer, and a second magnetic layer in non-contact with the first magnetic layer. The magnetic sensor, the first magnetic layer, and the second magnetic layer are disposed across a virtual straight line and arranged in this order in a direction parallel to the virtual straight line. Different portions of magnetic flux generated by a current to be detected pass through the magnetic sensor, the first magnetic layer, and the second magnetic layer.
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公开(公告)号：US20160282146A1
公开(公告)日：2016-09-29
申请号：US14996468
申请日：2016-01-15
Applicant: TDK Corporation
Inventor： Kunihiro UEDA , Yoshiyuki MIZOGUCHI , Hiroshi YAMAZAKI , Suguru WATANABE
CPC classification number: G01R33/09 , G01D5/2455 , G01R33/093 , G01R33/098
Abstract: A magnetic sensor is provided with first and second magnetoresistive effect elements that can detect an external magnetic field. The first and second magnetoresistive effect elements are a plurality of layers of multilayer body including free layers where their magnetization directions vary due to the external magnetic field. Shapes of the first and second magnetoresistive effect elements viewed from the upper side in the lamination direction are different from each other. The first magnetoresistive effect element has a shape that can increase a slope of an output of the first magnetoresistive effect element relative to the change of the external magnetic field. The second magnetoresistive effect element has a shape that can decrease a slope of an output of the second magnetoresistive effect element relative to the change of the external magnetic field compared to the slope of the output of the first magnetoresistive effect element.
Abstract translation: 磁传感器设置有能够检测外部磁场的第一和第二磁阻效应元件。 第一和第二磁阻效应元件是包括自由层的多层多层体，其中它们的磁化方向由于外部磁场而变化。 从层叠方向的上侧观察的第一和第二磁阻效应元件的形状彼此不同。 第一磁阻效应元件具有能够相对于外部磁场的变化增加第一磁阻效应元件的输出的斜率的形状。 第二磁阻效应元件具有相对于第一磁阻效应元件的输出的斜率相对于外部磁场的变化可以减小第二磁阻效应元件的输出的斜率的形状。
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