公开(公告)号：US08451003B2

公开(公告)日：2013-05-28

申请号：US12844091

申请日：2010-07-27

申请人： Hiroshi Yamazaki ,  Hiraku Hirabayashi ,  Naoki Ohta

发明人： Hiroshi Yamazaki ,  Hiraku Hirabayashi ,  Naoki Ohta

IPC分类号： G01R33/09

CPC分类号： G01R33/091 ,  G01D5/145

摘要： A magnetic sensor having first to fourth magneto-resistive elements, where the first and second magneto-resistive elements are connected at respective ends through a first connecting portion in a central region, and the third and fourth magneto-resistive elements are connected at respective ends through a second connecting portion that is parallel to the first connecting portion. The first and fourth magneto-resistive elements are connected at respective other ends through a third connecting portion, and the second and third magneto-resistive elements are connected at respective other ends through a fourth connecting portion. Depending on an external signal magnetic field, resistance values of the first and third magneto-resistive elements change in a same increasing or decreasing direction, whereas resistance values of the second and fourth magneto-resistive elements change in an increasing or decreasing direction opposite to the direction of the first and third magneto-resistive elements.

摘要翻译： 一种具有第一至第四磁阻元件的磁传感器，其中第一和第二磁阻元件通过中心区域中的第一连接部分在各自的端部连接，第三和第四磁阻元件在各自的端部连接 通过与第一连接部分平行的第二连接部分。 第一和第四磁阻元件在相应的另一端通过第三连接部连接，并且第二和第三磁阻元件通过第四连接部在相应的另一端连接。 取决于外部信号磁场，第一和第三磁阻元件的电阻值以相同的增加或减小的方向变化，而第二和第四磁阻元件的电阻值在与 第一和第三磁阻元件的方向。

公开(公告)号：US20110025322A1

公开(公告)日：2011-02-03

申请号：US12845992

申请日：2010-07-29

申请人： Hiroshi YAMAZAKI ,  Hiraku Hirabayashi ,  Naoki Ohta

发明人： Hiroshi YAMAZAKI ,  Hiraku Hirabayashi ,  Naoki Ohta

IPC分类号： G01R33/09

CPC分类号： G01R33/091 ,  G01R33/0005

摘要： A magneto-resistance effect element for a sensor to sense a variation in externally applied magnetism includes a pinned layer having a fixed magnetization direction, a free layer having a magnetization direction which varies in response to an external magnetic field, and an intermediate layer provided between the pinned layer and the free layer. The pinned layer has a planar shape which is long in the fixed magnetization direction and which is short in a direction orthogonal to the fixed magnetization direction. Moreover, the pinned layer preferably has a planar shape in which the pinned layer is divided into a plurality of sections.

摘要翻译： 用于感测外部施加的磁性的变化的传感器的磁电阻效应元件包括具有固定的磁化方向的固定层，具有响应于外部磁场而变化的磁化方向的自由层，以及设置在 钉扎层和自由层。 钉扎层具有在固定磁化方向上长的并且在与固定磁化方向正交的方向上短的平面形状。 此外，被钉扎层优选具有其中被钉扎层被分成多个部分的平面形状。

公开(公告)号：US08786280B2

公开(公告)日：2014-07-22

申请号：US12845992

申请日：2010-07-29

申请人： Hiroshi Yamazaki ,  Hiraku Hirabayashi ,  Naoki Ohta

发明人： Hiroshi Yamazaki ,  Hiraku Hirabayashi ,  Naoki Ohta

IPC分类号： G01R33/02

CPC分类号： G01R33/091 ,  G01R33/0005

摘要： A magneto-resistance effect element for a sensor to sense a variation in externally applied magnetism includes a pinned layer having a fixed magnetization direction, a free layer having a magnetization direction which varies in response to an external magnetic field, and an intermediate layer provided between the pinned layer and the free layer. The pinned layer has a planar shape which is long in the fixed magnetization direction and which is short in a direction orthogonal to the fixed magnetization direction. Moreover, the pinned layer preferably has a planar shape in which the pinned layer is divided into a plurality of sections.

摘要翻译： 用于感测外部施加的磁性的变化的传感器的磁电阻效应元件包括具有固定的磁化方向的固定层，具有响应于外部磁场而变化的磁化方向的自由层，以及设置在 钉扎层和自由层。 被钉扎层具有在固定磁化方向上长的并且在与固定磁化方向正交的方向上短的平面形状。 此外，被钉扎层优选具有其中被钉扎层被分成多个部分的平面形状。

公开(公告)号：US20110025320A1

公开(公告)日：2011-02-03

申请号：US12844090

申请日：2010-07-27

申请人： Naoki OHTA ,  Masanori Sakai ,  Hiraku Hirabayashi

发明人： Naoki OHTA ,  Masanori Sakai ,  Hiraku Hirabayashi

IPC分类号： G01R33/02 ,  H01L43/00

CPC分类号： G01R33/091 ,  G01R33/098 ,  H01L43/08

摘要： A magnetoresistive element includes magnetoresistive films each having an upper surface and a lower surface, and conductors combining the magnetoresistive films in series and including top electrodes and bottom electrodes. Each one of the top electrodes and corresponding one of the bottom electrodes oppose each other to sandwich corresponding one of the magnetoresistive films. Each electrode of the top electrodes and the bottom electrodes includes a stem section and a branch section, the stem section extending in a direction along a series alignment direction of the magnetoresistive films, and the branch section extending along the lamination plane in a direction intersecting a direction in which the stem section extends. The branch section in the top electrode is in contact with an upper surface of the corresponding magnetoresistive film, and the branch section in the bottom electrode is in contact with a lower surface of the corresponding magnetoresistive film.

摘要翻译： 磁阻元件包括各自具有上表面和下表面的磁阻膜，以及将磁阻膜串联并包括顶电极和底电极的导体。 顶部电极和对应的一个底部电极中的每一个彼此相对以夹持相应的一个磁阻膜。 顶部电极和底部电极的每个电极包括杆部分和分支部分，杆部分在沿着磁阻膜的串联取向方向的方向上延伸，并且分支部分沿着层叠平面沿与 杆段延伸的方向。 顶部电极中的分支部分与相应的磁阻膜的上表面接触，并且底部电极中的分支部分与相应的磁阻膜的下表面接触。

公开(公告)号：US08593139B2

公开(公告)日：2013-11-26

申请号：US12947328

申请日：2010-11-16

申请人： Naoki Ohta ,  Hiraku Hirabayashi ,  Masanori Sakai ,  Hiroshi Naganuma

发明人： Naoki Ohta ,  Hiraku Hirabayashi ,  Masanori Sakai ,  Hiroshi Naganuma

IPC分类号： G01R33/02

CPC分类号： G01R33/093 ,  B82Y25/00 ,  G01R33/0029

摘要： A magnetic sensor includes a spin valve-type magneto-resistive element, a voltage detection part, a coil, and a current control part, the coil being configured to apply a measuring magnetic field to the spin valve-type magneto-resistive element upon application of a current, the voltage detection part being configured to output a detection signal to the current control part upon detecting an output voltage of the spin valve-type magneto-resistive element reaching a predetermined voltage value, the current control part being configured to control the current to unidirectionally increase or unidirectionally decrease a strength of the measuring magnetic field from an initial value, but upon input of the detection signal, control the current to return the strength of the measuring magnetic field to the initial value, the initial value being a magnetic field strength where the spin valve-type magneto-resistive element reaches saturation magnetization.

摘要翻译： 磁传感器包括自旋阀型磁阻元件，电压检测部件，线圈和电流控制部件，该线圈被配置为在应用时向自旋阀型磁阻元件施加测量磁场 电流检测部分被配置为在检测到自旋阀型磁阻元件的输出电压达到预定电压值时将检测信号输出到电流控制部分，该电流控制部分被配置为控制电流控制部分 电流从初始值​​单向增加或单向地降低测量磁场的强度，但是当输入检测信号时，控制电流将测量磁场的强度返回到初始值，初始值为磁 自旋阀型磁阻元件达到饱和磁化强度的场强。

公开(公告)号：US20110221433A1

公开(公告)日：2011-09-15

申请号：US12947328

申请日：2010-11-16

申请人： Naoki OHTA ,  Hiraku Hirabayashi ,  Masanori Sakai ,  Hiroshi Naganuma

发明人： Naoki OHTA ,  Hiraku Hirabayashi ,  Masanori Sakai ,  Hiroshi Naganuma

IPC分类号： G01R33/02

CPC分类号： G01R33/093 ,  B82Y25/00 ,  G01R33/0029

摘要： A magnetic sensor includes a spin valve-type magneto-resistive element, a voltage detection part, a coil, and a current control part, the coil being configured to apply a measuring magnetic field to the spin valve-type magneto-resistive element upon application of a current, the voltage detection part being configured to output a detection signal to the current control part upon detecting an output voltage of the spin valve-type magneto-resistive element reaching a predetermined voltage value, the current control part being configured to control the current to unidirectionally increase or unidirectionally decrease a strength of the measuring magnetic field from an initial value, but upon input of the detection signal, control the current to return the strength of the measuring magnetic field to the initial value, the initial value being a magnetic field strength where the spin valve-type magneto-resistive element reaches saturation magnetization.

摘要翻译： 磁传感器包括自旋阀型磁阻元件，电压检测部件，线圈和电流控制部件，该线圈被配置为在应用时向自旋阀型磁阻元件施加测量磁场 电流检测部分被配置为在检测到自旋阀型磁阻元件的输出电压达到预定电压值时将检测信号输出到电流控制部分，该电流控制部分被配置为控制电流控制部分 电流从初始值​​单向增加或单向地降低测量磁场的强度，但是当输入检测信号时，控制电流将测量磁场的强度返回到初始值，初始值为磁 自旋阀型磁阻元件达到饱和磁化强度的场强。

公开(公告)号：US08427144B2

公开(公告)日：2013-04-23

申请号：US12844090

申请日：2010-07-27

申请人： Naoki Ohta ,  Masanori Sakai ,  Hiraku Hirabayashi

发明人： Naoki Ohta ,  Masanori Sakai ,  Hiraku Hirabayashi

IPC分类号： G01R33/09

CPC分类号： G01R33/091 ,  G01R33/098 ,  H01L43/08

摘要： A magnetoresistive element includes magnetoresistive films each having an upper surface and a lower surface, and conductors combining the magnetoresistive films in series and including top electrodes and bottom electrodes. Each one of the top electrodes and corresponding one of the bottom electrodes oppose each other to sandwich corresponding one of the magnetoresistive films. Each electrode of the top electrodes and the bottom electrodes includes a stem section and a branch section, the stem section extending in a direction along a series alignment direction of the magnetoresistive films, and the branch section extending along the lamination plane in a direction intersecting a direction in which the stem section extends. The branch section in the top electrode is in contact with an upper surface of the corresponding magnetoresistive film, and the branch section in the bottom electrode is in contact with a lower surface of the corresponding magnetoresistive film.

摘要翻译： 磁阻元件包括各自具有上表面和下表面的磁阻膜，以及将磁阻膜串联并包括顶电极和底电极的导体。 顶部电极和对应的一个底部电极中的每一个彼此相对以夹持相应的一个磁阻膜。 顶部电极和底部电极的每个电极包括杆部分和分支部分，杆部分在沿着磁阻膜的串联取向方向的方向上延伸，并且分支部分沿着层叠平面沿与 杆段延伸的方向。 顶部电极中的分支部分与相应的磁阻膜的上表面接触，并且底部电极中的分支部分与相应的磁阻膜的下表面接触。

公开(公告)号：US08023225B2

公开(公告)日：2011-09-20

申请号：US12176127

申请日：2008-07-18

申请人： Koji Shimazawa ,  Hiraku Hirabayashi ,  Kosuke Tanaka ,  Eiji Komura

发明人： Koji Shimazawa ,  Hiraku Hirabayashi ,  Kosuke Tanaka ,  Eiji Komura

IPC分类号： G11B7/135

CPC分类号： G11B5/314 ,  G11B2005/001 ,  G11B2005/0021

摘要： While an emitting position of light from an optical waveguide and a magnetic pole end part are made closer to each other, high-density writing onto a magnetic recording medium is realized.A thermally assisted magnetic head comprises a main magnetic pole layer having a magnetic pole end part exposed at a medium-opposing surface opposing a magnetic disk, and an optical waveguide for deflecting laser light incident thereon into a laminating direction. The main magnetic pole layer is positioned on a side where the light is deflected by the optical waveguide. The magnetic pole end part projects to the side where the light is deflected by the optical waveguide. The optical waveguide projects more than the magnetic pole end part on the medium-opposing surface side.

摘要翻译： 虽然使来自光波导和磁极端部的光的发射位置彼此靠近，但是实现了对磁记录介质的高密度写入。 热辅助磁头包括具有在与磁盘相对的介质相对表面处露出的磁极端部的主磁极层和用于将入射到其上的激光偏转成层叠方向的光波导。 主磁极层位于光被光波导偏转的一侧。 磁极端部突出到光被光波导偏转的一侧。 光波导在介质相对表面侧上突出超过磁极端部。

公开(公告)号：US20110031965A1

公开(公告)日：2011-02-10

申请号：US12816725

申请日：2010-06-16

申请人： Shunji SARUKI ,  Hiraku Hirabayashi

发明人： Shunji SARUKI ,  Hiraku Hirabayashi

IPC分类号： G01B7/30

CPC分类号： G01D3/036 ,  G01D5/24476

摘要： A magnetic sensor includes a first detection unit and a second detection unit. The first detection unit calculates a first detection angle which is a detected value of a first angle that a direction of an external magnetic field in a first position forms with respect to a first direction. The second detection unit calculates a second detection angle which is a detected value of a second angle that the direction of the external magnetic field in a second position forms with respect to a second direction. The first detection angle includes a first angular error. The second detection angle includes a second angular error. The first angular error and the second angular error differ in phase by an odd number of times ½ of the error period.

摘要翻译： 磁传感器包括第一检测单元和第二检测单元。 第一检测单元计算作为相对于第一方向形成第一位置的外部磁场的方向的第一角度的检测值的第一检测角度。 第二检测单元计算作为相对于第二方向形成第二位置的外部磁场的方向的第二角度的检测值的第二检测角度。 第一检测角度包括第一角度误差。 第二检测角度包括第二角度误差。 第一个角度误差和第二个角度误差的相位差异为误差周期的1/2倍。

公开(公告)号：US20110025319A1

公开(公告)日：2011-02-03

申请号：US12841501

申请日：2010-07-22

申请人： Shunji SARUKI ,  Hiraku Hirabayashi

发明人： Shunji SARUKI ,  Hiraku Hirabayashi

IPC分类号： G01R33/02

CPC分类号： G01R33/0029 ,  G01R33/091

摘要： A magnetic sensor includes a bridge circuit with a first, a second, a third, and a fourth resistor annularly and electrically connected together in this order, and a compensation resistor. The compensation resistor is connected to a first point between the fourth resistor and the first resistor. The first to fourth resistors include a first to fourth tunnel magneto-resistance element, respectively. Each of the magnetization directions in the magnetization fixed layers in the second and fourth magneto resistance elements is opposite to the magnetization direction in the magnetization fixed layer in the first magneto resistance element. The magnetization direction in the magnetization fixed layer in the third magneto resistance element is the same as the magnetization direction in the magnetization fixed layer in the first magneto resistance element. The resistance of the compensation resistor varies with a period of 180 degrees with respect to a rotation angle of the external field.

摘要翻译： 磁传感器包括具有依次环形并电连接在一起的第一，第二，第三和第四电阻器的桥式电路和补偿电阻器。 补偿电阻器连接到第四电阻器和第一电阻器之间的第一点。 第一至第四电阻器分别包括第一至第四隧道磁阻元件。 第二和第四磁阻元件中的磁化固定层中的每个磁化方向与第一磁阻元件中的磁化固定层中的磁化方向相反。 第三磁阻元件的磁化固定层的磁化方向与第一磁阻元件的磁化固定层的磁化方向相同。 补偿电阻的电阻相对于外部场的旋转角度为180度的周期而变化。