公开(公告)号：US20130057266A1

公开(公告)日：2013-03-07

申请号：US13668127

申请日：2012-11-02

Applicant: Alps Green Devices Co., Ltd.

Inventor： Yoshihiro NISHIYAMA ,  Masamichi SAITO ,  Akira TAKAHASHI ,  Masahiro IIZUKA

IPC: G01R33/025

CPC classification number: G01R15/205 ,  G01R33/093

Abstract: A magnetic balance type current sensor includes a magnetic balance type current sensor including a magnetoresistance effect element whose characteristic changes owing to an induction magnetic field from a current to be measured flowing through a conductor, a feedback coil configured to be disposed in the vicinity of the magnetoresistance effect element and generate a cancelling magnetic field cancelling out the induction magnetic field, a magnetic shield configured to attenuate the induction magnetic field and enhance the cancelling magnetic field, and a hard bias layer configured to be provided on or above the magnetic shield.

Abstract translation: 磁平衡型电流传感器包括磁平衡型电流传感器，该磁平衡型电流传感器包括磁阻效应元件，该磁阻效应元件的特性由于流过导体的待测电流的感应磁场而变化，被配置为设置在接近 产生抵消磁场的抵消磁场，构造成使感应磁场衰减并增强抵消磁场的磁屏蔽，以及配置成设置在磁屏蔽上或上方的硬偏置层。

公开(公告)号：US20130221998A1

公开(公告)日：2013-08-29

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: G01R19/00

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。

公开(公告)号：US20130265040A1

公开(公告)日：2013-10-10

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

IPC: G01R15/20

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。

公开(公告)号：US20130249531A1

公开(公告)日：2013-09-26

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

IPC: G01R19/00

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。

公开(公告)号：US20130265038A1

公开(公告)日：2013-10-10

申请号：US13908980

申请日：2013-06-03

Applicant: ALPS GREEN DEVICES CO., LTD.

Inventor： Yosuke IDE ,  Masamichi SAITO ,  Akira TAKAHASHI ,  Kenji ICHINOHE

IPC: G01R33/09

CPC classification number: G01R33/093 ,  B82Y25/00 ,  G01R15/205

Abstract: A magnetic proportional current sensor includes a magnetic-field detection bridge circuit constituted by four magnetoresistive elements having resistance values changed with application of an induced magnetic field from a current to be measured. Each of the four magnetoresistive elements includes a ferromagnetic pinned layer made up of a first ferromagnetic film and a second ferromagnetic film antiferromagnetically coupled to each other with an antiparallel coupling film interposed therebetween, a nonmagnetic intermediate layer, and a soft magnetic free layer. The first ferromagnetic film and the second ferromagnetic film have substantially equal Curie temperatures and have magnetization magnitudes with a substantially zero difference therebetween. The ferromagnetic pinned layers in the three magnetoresistive elements have a same magnetization direction, and the ferromagnetic pinned layer in the remaining one magnetoresistive element has a magnetization direction differing by 180° from the magnetization direction of the ferromagnetic pinned layers in the three magnetoresistive elements.

Abstract translation: 磁比例电流传感器包括由四个磁阻元件构成的磁场检测桥电路，其具有通过施加来自待测量电流的感应磁场而改变的电阻值。 四个磁阻元件中的每一个包括由第一铁磁膜和第二铁磁膜构成的铁磁性钉扎层，第二铁磁膜与反并联耦合的反并联耦合膜，非磁性中间层和软磁性层。 第一铁磁膜和第二铁磁膜具有大致相等的居里温度，并具有在其间具有基本上零差的磁化强度。 三个磁阻元件中的铁磁固定层具有相同的磁化方向，并且剩余的一个磁阻元件中的铁磁钉扎层具有与三个磁阻元件中的铁磁性钉扎层的磁化方向相差180°的磁化方向。