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    Magneto-resistive device with reduced susceptibility to ion beam damage
    1.
    发明授权
    Magneto-resistive device with reduced susceptibility to ion beam damage 失效
    具有降低的离子束损伤敏感性的磁阻器件

    公开(公告)号：US07057859B2

    公开(公告)日：2006-06-06

    申请号：US10600444

    申请日：2003-06-23

    申请人： Takeo Kagami ,  Kazuki Sato ,  Takayasu Kanaya ,  Shunji Saruki ,  Tetsuya Kuwashima

    发明人： Takeo Kagami ,  Kazuki Sato ,  Takayasu Kanaya ,  Shunji Saruki ,  Tetsuya Kuwashima

    IPC分类号： G11B5/39

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3106 ,  G11B5/313 ,  G11B5/3133 ,  G11B5/3903 ,  G11B5/3909 ,  G11B5/3967 ,  G11B2005/3996

    摘要： A magneto-resistive device is improved in characteristics by removing a surface oxide film to reduce the resistance and reducing an ion beam damage. The magneto-resistive device has a magneto-resistive layer which comprises a tunnel barrier layer, an underlying pinned layer, and an overlying free layer. A non-magnetic layer is formed on the free layer for protection. A composite-layer film comprised of an insulating layer and a damage reducing layer is formed in contact with an effective region which is effectively involved in detection of magnetism in the magneto-resistive layer without overlapping with the effective region. The damage reducing layer is made of a material which includes at least one element, the atomic weight of which is larger than that of silicon. The insulating layer and damage reducing layer do not constitute a magnetic domain control layer for applying a biasing magnetic field to the free layer.

    摘要翻译： 通过去除表面氧化膜以降低电阻并减少离子束损伤，改善了磁阻元件的特性。 磁阻装置具有磁阻层，其包括隧道阻挡层，下面的被钉扎层和上覆自由层。 在自由层上形成非磁性层以进行保护。 形成与绝缘层和损伤减少层组成的复合层膜与有效区域接触，该有效区域有效地涉及磁阻层中的磁性检测，而不与有效区域重叠。 损伤减少层由包括至少一种元素的材料制成，其原子量大于硅的原子量。 绝缘层和损伤降低层不构成用于向自由层施加偏置磁场的磁畴控制层。

    Method of manufacturing a magnetic head
    3.
    发明申请
    Method of manufacturing a magnetic head 有权
    制造磁头的方法

    公开(公告)号：US20050102821A1

    公开(公告)日：2005-05-19

    申请号：US11013743

    申请日：2004-12-17

    申请人： Takeo Kagami ,  Kunihiro Ueda ,  Kentaro Nagai ,  Shunji Saruki

    发明人： Takeo Kagami ,  Kunihiro Ueda ,  Kentaro Nagai ,  Shunji Saruki

    IPC分类号： G11B5/127 ,  G11B5/31 ,  G11B5/39 ,  G11B5/40 ,  G11B5/48 ,  H04R31/00

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3106 ,  G11B5/3116 ,  G11B5/3903 ,  G11B5/40 ,  G11B5/488 ,  G11B2005/3996 ,  Y10T29/49032 ,  Y10T29/49041 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49052

    摘要： A method of manufacturing a magnetic head manufactures a magnetic head having a base, and a laminate stacked on the base and including a magneto-resistive device. The method mechanically polishes a surface of a structure including the base and the laminate close to a magnetic recording medium, wherein the surface of the structure includes an end face of the laminate including an end face of the magneto-resistive device and a surface of the base. Next, the method selectively etches a first region on the surface of the structure close to the magnetic recording medium, wherein the first region includes the surface of the base but does not include the end face of the magneto-resistive device. Subsequently, the method entirely etches the surface of the structure close to the magnetic recording medium.

    摘要翻译： 制造磁头的方法制造具有底座的磁头和堆叠在基座上并包括磁阻装置的层叠体。 该方法将包括基底和层压板的结构的表面机械抛光到靠近磁记录介质的位置，其中该结构的表面包括层压体的端面，该端面包括该磁阻装置的端面和 基础。 接下来，该方法选择性地蚀刻靠近磁记录介质的结构表面上的第一区域，其中第一区域包括基底的表面，但不包括磁阻装置的端面。 随后，该方法完全蚀刻靠近磁记录介质的结构表面。

    Method of manufacturing a magnetic head
    6.
    发明授权
    Method of manufacturing a magnetic head 有权
    制造磁头的方法

    公开(公告)号：US07207100B2

    公开(公告)日：2007-04-24

    申请号：US11013743

    申请日：2004-12-17

    申请人： Takeo Kagami ,  Kunihiro Ueda ,  Kentaro Nagai ,  Shunji Saruki

    发明人： Takeo Kagami ,  Kunihiro Ueda ,  Kentaro Nagai ,  Shunji Saruki

    IPC分类号： G11B5/127 ,  H04R31/00

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3106 ,  G11B5/3116 ,  G11B5/3903 ,  G11B5/40 ,  G11B5/488 ,  G11B2005/3996 ,  Y10T29/49032 ,  Y10T29/49041 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49052

    摘要： A method of manufacturing a magnetic head manufactures a magnetic head having a base, and a laminate stacked on the base and including a magneto-resistive device. The method mechanically polishes a surface of a structure including the base and the laminate close to a magnetic recording medium, wherein the surface of the structure includes an end face of the laminate including an end face of the magneto-resistive device and a surface of the base. Next, the method selectively etches a first region on the surface of the structure close to the magnetic recording medium, wherein the first region includes the surface of the base but does not include the end face of the magneto-resistive device. Subsequently, the method entirely etches the surface of the structure close to the magnetic recording medium.

    摘要翻译： 制造磁头的方法制造具有底座的磁头和堆叠在基座上并包括磁阻装置的层叠体。 该方法将包括基底和层压板的结构的表面机械抛光到靠近磁记录介质的位置，其中该结构的表面包括层压体的端面，该端面包括该磁阻装置的端面和 基础。 接下来，该方法选择性地蚀刻靠近磁记录介质的结构表面上的第一区域，其中第一区域包括基底的表面，但不包括磁阻装置的端面。 随后，该方法完全蚀刻靠近磁记录介质的结构表面。

    Rotating field sensor
    7.
    发明授权
    Rotating field sensor 有权
    旋转场传感器

    公开(公告)号：US08736256B2

    公开(公告)日：2014-05-27

    申请号：US13205209

    申请日：2011-08-08

    申请人： Yosuke Komasaki ,  Hiraku Hirabayashi ,  Shunji Saruki

    发明人： Yosuke Komasaki ,  Hiraku Hirabayashi ,  Shunji Saruki

    IPC分类号： G01B7/30

    CPC分类号： G01R33/093 ,  B82Y25/00 ,  G01D5/145

    摘要： A rotating field sensor includes a first detection circuit that outputs a first signal indicating the intensity of a component of a rotating magnetic field in a first direction, a second detection circuit that outputs a second signal indicating the intensity of a component of the rotating magnetic field in a second direction, and an arithmetic circuit that calculates a detected angle value based on the first and second signals. Each of the first and second detection circuits includes at least one MR element row. Each MR element row is composed of a plurality of MR elements connected in series. Each MR element has a magnetization pinned layer. The plurality of MR elements forming each MR element row include one or more pairs of MR elements. Magnetization directions of the magnetization pinned layers in two MR elements making up a pair form a predetermined relative angle other than 0° and 180°.

    摘要翻译： 旋转场传感器包括：第一检测电路，输出表示第一方向上的旋转磁场的分量的强度的第一信号;第二检测电路，输出表示旋转磁场的分量强度的第二信号 以及算术电路，其基于第一和第二信号计算检测角度值。 第一和第二检测电路中的每一个包括至少一个MR元件行。 每个MR元件行由串联连接的多个MR元件组成。 每个MR元件具有磁化固定层。 形成每个MR元件行的多个MR元件包括一对或多对MR元件。 构成一对的两个MR元件中的磁化钉扎层的磁化方向形成除了0°和180°之外的预定相对角度。

    Rotating field sensor
    8.
    发明授权
    Rotating field sensor 有权
    旋转场传感器

    公开(公告)号：US08659289B2

    公开(公告)日：2014-02-25

    申请号：US13166409

    申请日：2011-06-22

    申请人： Shunji Saruki ,  Hiraku Hirabayashi

    发明人： Shunji Saruki ,  Hiraku Hirabayashi

    IPC分类号： G01B7/30 ,  G01B7/14 ,  G01R33/02

    CPC分类号： G01R33/093 ,  B82Y25/00

    摘要： A field generation unit generates a rotating magnetic field including a first partial magnetic field in a first position and a second partial magnetic field in a second position. The first and second partial magnetic fields differ in direction by 180° and rotate in the same direction of rotation. A first detection unit detects, in the first position, a first angle that the direction of a first applied field forms with respect to a first direction. The first applied field includes the first partial magnetic field as its main component. A second detection unit detects, in the second position, a second angle that the direction of a second applied field forms with respect to a second direction. The second applied field includes the second partial magnetic field as its main component. A detected value of the angle that the direction of the rotating magnetic field in a reference position forms with respect to a reference direction is calculated based on detected values of the first and second angles.

    摘要翻译： 场产生单元产生包括第一位置的第一部分磁场和第二位置的第二局部磁场的旋转磁场。 第一和第二部分磁场在180°方向上不同，并且沿相同的旋转方向旋转。 第一检测单元在第一位置检测第一施加磁场的方向相对于第一方向形成的第一角度。 第一施加场包括第一部分磁场作为其主要成分。 第二检测单元在第二位置检测第二施加磁场的方向相对于第二方向形成的第二角度。 第二施加场包括第二部分磁场作为其主要成分。 基于第一和第二角度的检测值来计算基准位置中的旋转磁场的方向相对于基准方向形成的角度的检测值。

    Rotating field sensor
    9.
    发明授权
    Rotating field sensor 有权
    旋转场传感器

    公开(公告)号：US08909489B2

    公开(公告)日：2014-12-09

    申请号：US13176485

    申请日：2011-07-05

    申请人： Shunji Saruki ,  Hiraku Hirabayashi ,  Yosuke Komasaki

    发明人： Shunji Saruki ,  Hiraku Hirabayashi ,  Yosuke Komasaki

    IPC分类号： G01R33/09 ,  B82Y25/00 ,  G01D5/14

    CPC分类号： G01R33/093 ,  B82Y25/00 ,  G01D5/145

    摘要： A first detection unit has first and second detection circuits. A second detection unit has third and fourth detection circuits. Output signals of the second and fourth detection circuits differ from output signals of the first and third detection circuits in phase, respectively, by an odd number of times ¼ the signal period. The output signal of the third detection circuit differs from the output signal of the first detection circuit in phase by an integer multiple of ⅙ the signal period other than an integer multiple of ½ the signal period. A rotating field sensor generates a first signal based on the output signals of the first and third detection circuits, generates a second signal based on the output signals of the second and fourth detection circuits, and calculates a detected angle value based on the first and second signals.

    摘要翻译： 第一检测单元具有第一和第二检测电路。 第二检测单元具有第三和第四检测电路。 第二和第四检测电路的输出信号分别与第一和第三检测电路的输出信号分别相差奇数倍的信号周期。 第三检测电路的输出信号与第一检测电路的输出信号相位不同于信号周期的整数倍，除了信号周期的1/2的整数倍。 旋转场传感器基于第一和第三检测电路的输出信号产生第一信号，基于第二和第四检测电路的输出信号产生第二信号，并基于第一和第二检测电路计算检​​测角度值 信号。

    Rotating field sensor
    10.
    发明授权
    Rotating field sensor 有权
    旋转场传感器

    公开(公告)号：US08604780B2

    公开(公告)日：2013-12-10

    申请号：US13164427

    申请日：2011-06-20

    申请人： Shunji Saruki ,  Hiraku Hirabayashi

    发明人： Shunji Saruki ,  Hiraku Hirabayashi

    IPC分类号： G01B7/30 ,  G01B7/14

    CPC分类号： G01R33/091 ,  G01D5/145

    摘要： A field generation unit generates a rotating magnetic field including a first partial magnetic field in a first position and a second partial magnetic field in a second position. The first and second partial magnetic fields differ in direction by 180° and rotate in the same direction of rotation. A first detection unit located in the first position has first and second detection circuits whose output signals differ in phase by ¼ the period. A second detection unit located in the second position has third and fourth detection circuits whose output signals differ in phase by ¼ the period. A detected value of the angle that the direction of the rotating magnetic field in a reference position forms with respect to a reference direction is calculated based on a first signal generated from the output signals of the first and third detection circuits and a second signal generated from the output signals of the second and fourth detection circuits.

    摘要翻译： 场产生单元产生包括第一位置的第一部分磁场和第二位置的第二局部磁场的旋转磁场。 第一和第二部分磁场在180°方向上不同，并且沿相同的旋转方向旋转。 位于第一位置的第一检测单元具有第一和第二检测电路，其输出信号的相位相差1/4。 位于第二位置的第二检测单元具有第三和第四检测电路，其输出信号的相位相差1/4。 基于从第一和第三检测电路的输出信号产生的第一信号和从第一和第三检测电路产生的第二信号来计算基准位置中相对于参考方向形成的旋转磁场的方向的角度的检测值 第二和第四检测电路的输出信号。