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公开(公告)号：US09207264B2
公开(公告)日：2015-12-08
申请号：US13910009
申请日：2013-06-04
Applicant: ALPS GREEN DEVICES CO., LTD.
Inventor： Yosuke Ide , Masamichi Saito , Akira Takahashi , Masahiro Iizuka , Kenji Ichinohe , Yoshihiro Nishiyama , Mitsuo Aratono
CPC classification number: G01R15/205 , B82Y25/00 , G01R33/09 , G01R33/093 , H01F10/3272 , H01L27/22 , H01L43/08
Abstract: A current sensor includes a substrate, a conductive body being provided above the substrate and extending in one direction, and magnetoresistance effect elements being provided between the substrate and the conductive body and outputting output signals owing to an induction magnetic field from a current to be measured being conducted through the conductive body, wherein each of the magnetoresistance effect elements has a laminated structure including a ferromagnetic fixed layer whose magnetization direction is fixed, a non-magnetic intermediate layer, and a free magnetic layer whose magnetization direction fluctuates with respect to an external magnetic field, the ferromagnetic fixed layer is a self-pinned type formed by antiferromagnetically coupling a first ferromagnetic film and a second ferromagnetic film through an antiparallel coupling film, the Curie temperatures of the first ferromagnetic film and the second ferromagnetic film are approximately equal, and a difference between the magnetization amounts thereof is substantially zero.
Abstract translation: 电流传感器包括衬底，导电体设置在衬底上并在一个方向上延伸，并且磁阻效应元件设置在衬底和导电体之间，并且由于来自待测电流的感应磁场而输出输出信号 通过导电体导电，其中每个磁阻效应元件具有包括其磁化方向固定的铁磁固定层，非磁性中间层和磁化方向相对于外部的磁化方向波动的自由磁性层的层压结构 铁磁固定层是通过反平行耦合膜反铁磁耦合第一铁磁膜和第二铁磁膜而形成的自固定型，第一铁磁膜和第二铁磁性膜的居里温度近似相等， t之间的区别 其磁化量基本为零。
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公开(公告)号：US08760158B2
公开(公告)日：2014-06-24
申请号：US13917525
申请日：2013-06-13
Applicant: Alps Green Devices Co., Ltd.
Inventor： Kenji Ichinohe , Masamichi Saito , Akira Takahashi , Yosuke Ide
CPC classification number: G01R33/09 , G01R15/205 , G01R19/0092
Abstract: A current sensor including a magnetic detecting bridge circuit which is constituted of four magneto-resistance effect elements with a resistance value varied by application of an induced magnetic field from a current to be measured, and which has an output between two magneto-resistance effect elements. The four magneto-resistance effect elements have the same resistance change rate, and include a self-pinned type ferromagnetic fixed layer which is formed by anti-ferromagnetically coupling a first ferromagnetic film and a second ferromagnetic film via an antiparallel coupling film therebetween, a nonmagnetic intermediate layer, and a soft magnetic free layer. Magnetization directions of the ferromagnetic fixed layers of the two magneto-resistance effect elements providing the output are different from each other by 180°. The magnetic detecting bridge circuit has wiring symmetrical to a power supply point.
Abstract translation: 一种电流传感器，包括磁检测桥电路，其由具有通过施加来自待测电流的感应磁场而变化的电阻值的四个磁阻效应元件构成，并且具有两个磁阻效应元件之间的输出 。 四个磁阻效应元件具有相同的电阻变化率，并且包括通过其间的反平行耦合膜将第一铁磁膜和第二铁磁膜反铁磁耦合形成的自固定型铁磁性固定层，非磁性 中间层和软磁性层。 提供输出的两个磁阻效应元件的铁磁固定层的磁化方向彼此相差180°。 磁检测桥电路具有与电源点对称的布线。
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公开(公告)号：US09229032B2
公开(公告)日：2016-01-05
申请号：US13856345
申请日：2013-04-03
Applicant: ALPS GREEN DEVICES CO., LTD.
Inventor： Yosuke Ide , Masamichi Saito , Akira Takahashi , Kenji Ichinohe , Yoshihiro Nishiyama
IPC: G01R27/08 , G01R19/00 , B82Y25/00 , G01R15/20 , G01R33/09 , H01L43/08 , B82Y5/00 , G11B3/00 , H01F1/00
CPC classification number: G01R19/00 , B82Y5/00 , B82Y25/00 , G01R15/205 , G01R33/093 , G11B3/00 , H01F1/00 , H01L43/08
Abstract: A current sensor includes a magnetoresistive element that has a stripe shape and that has a sensing axis in a certain direction. The magnetoresistive element includes element portions that are disposed so as to be spaced apart from each other in a longitudinal direction of the stripe shape, and permanent magnet portions, each of which is disposed between adjacent ones of the element portions. Each element portion has a layered structure including a free magnetic layer whose magnetization direction is changed with respect to an external magnetic field, a non-magnetic intermediate layer, and a ferromagnetic pinned layer whose magnetization direction is pinned. The permanent magnet portion includes a hard bias layer, and an electrode layer that is disposed so as to cover the hard bias layer.
Abstract translation: 电流传感器包括磁阻元件，该磁阻元件具有条形并且在一定方向上具有感测轴。 磁阻元件包括沿条带形状的纵向方向彼此间隔开的元件部分和设置在相邻元件部分之间的永磁体部分。 每个元件部分具有层状结构，其包括磁化方向相对于外部磁场而变化的自由磁性层，非磁性中间层和磁化方向被钉扎的铁磁性钉扎层。 永久磁铁部分包括硬偏置层和设置成覆盖硬偏置层的电极层。
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公开(公告)号：US09435831B2
公开(公告)日：2016-09-06
申请号：US13905049
申请日：2013-05-29
Applicant: ALPS GREEN DEVICES CO., LTD.
Inventor： Mitsuo Aratono , Masahiro Iizuka , Masamichi Saito , Akira Takahashi , Shigenobu Miyajima , Kenji Ichinohe , Yoshihiro Nishiyama , Yosuke Ide , Shinji Mitsuya
CPC classification number: G01R19/0092 , B82Y25/00 , G01R15/205 , G01R15/207
Abstract: A current sensor includes a magnetic sensor module including a plurality of magnetic sensor units connected in series. The magnetic sensor units each include a first magnetic sensor element and a second magnetic sensor element which have sensitivity axes oriented in opposite directions. A first terminal of the first magnetic sensor unit is connected to a first potential source. A third terminal of the first magnetic sensor unit is connected to a second potential source. A second terminal and a fourth terminal of the last magnetic sensor unit are connected to constitute a sensor output terminal. The first terminal of each of the magnetic sensor units excluding the first magnetic sensor unit is connected to the second terminal of the next magnetic sensor unit and the third terminal thereof is connected to the fourth terminal of the next magnetic sensor unit.
Abstract translation: 电流传感器包括具有串联连接的多个磁传感器单元的磁传感器模块。 磁传感器单元各自包括具有以相反方向定向的灵敏度轴的第一磁传感器元件和第二磁传感器元件。 第一磁传感器单元的第一端子连接到第一电位源。 第一磁传感器单元的第三端子连接到第二电位源。 连接最后一个磁传感器单元的第二端子和第四端子以构成传感器输出端子。 除了第一磁传感器单元之外的每个磁传感器单元的第一端子连接到下一个磁传感器单元的第二端子，并且其第三端子连接到下一个磁传感器单元的第四端子。
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