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47 条记录 (耗时 0.029 秒)

    Magnetic encoder apparatus
    22.
    发明授权
    Magnetic encoder apparatus 有权
    磁性编码器装置

    公开(公告)号：US07456758B2

    公开(公告)日：2008-11-25

    申请号：US11676608

    申请日：2007-02-20

    申请人： Hiroyuki Hoshiya ,  Kenichi Meguro ,  Kazuhiro Nakamoto ,  Yasunori Abe

    发明人： Hiroyuki Hoshiya ,  Kenichi Meguro ,  Kazuhiro Nakamoto ,  Yasunori Abe

    IPC分类号： H03M1/22

    CPC分类号： G01D5/145 ,  B82Y25/00 ,  G01R33/093 ,  G11B5/59683

    摘要： To provide a magnetic encoder having high resolution and a high output, and a magnetoresistive sensor for an encoder. A fine sensor having a reduced demagnetization field is produced by: forming a free layer consists of a laminated soft magnetic film in which two soft magnetic layers are coupled in anti-parallel, and setting the width of a sensor unit to 2 μm to 4 μm.

    摘要翻译： 提供具有高分辨率和高输出的磁编码器和用于编码器的磁阻传感器。 具有减少退磁场的精细传感器通过以下方式产生：形成自由层，其由两层软磁层反平行连接的层叠软磁膜构成，并将传感器单元的宽度设定为2μm至4μm 。

    MAGNETIC RECORDING AND REPRODUCING HEAD AND MAGNETIC RECORDING AND REPRODUCING DEVICE
    26.
    发明申请
    MAGNETIC RECORDING AND REPRODUCING HEAD AND MAGNETIC RECORDING AND REPRODUCING DEVICE 失效
    磁记录和再现磁头和磁记录和再现装置

    公开(公告)号：US20090207531A1

    公开(公告)日：2009-08-20

    申请号：US12365195

    申请日：2009-02-04

    申请人： Masato SHIIMOTO ,  Takeshi Nakagawa ,  Hiroyuki Katada ,  Naoto Ito ,  Kenichi Meguro

    发明人： Masato SHIIMOTO ,  Takeshi Nakagawa ,  Hiroyuki Katada ,  Naoto Ito ,  Kenichi Meguro

    IPC分类号： G11B5/33

    CPC分类号： G11B5/3909 ,  B82Y10/00 ,  B82Y25/00 ,  G11B5/3912 ,  G11B5/3967 ,  G11B2005/3996

    摘要： A magnetic recording read head is provided capable of achieving high reproduction output, resolution, and SNR, even at a high linear density. There is also provided a magnetic recording and reproducing device capable of achieving sufficient error bit rate. The magnetic recording read head includes a differential read head and a write head. The differential read head has a multilayer structure formed by laminating a first magnetoresistive sensor having a first free layer, a differential gap layer, and a second magnetoresistive sensor having a second free layer. Outside the multilayer structure, a pair of electrodes and a pair of magnetic shields are provided respectively. A ratio (Gl/bl) of an inside distance (Gl) between the first and second free layers to a bit length (bl) is set to 0.6 or more and 1.6 or less.

    摘要翻译： 提供了能够实现高再现输出，分辨率和SNR的磁记录读取头，即使在高线性密度下也是如此。 还提供了能够实现足够的错误比特率的磁记录和再现装置。 磁记录读取头包括差分读取头和写入头。 差分读取头具有层叠具有第一自由层，差分间隙层的第一磁阻传感器和具有第二自由层的第二磁阻传感器形成的多层结构。 在多层结构之外，分别设置一对电极和一对磁屏蔽。 将第一自由层与第二自由层之间的内部距离（G1）与比特长度（b1）的比（G1 / b1）设定为0.6以上且1.6以下。

    Magnetic recording and reproducing device including a differential read head
    27.
    发明授权
    Magnetic recording and reproducing device including a differential read head 失效
    磁记录和再现装置包括差分读头

    公开(公告)号：US08270122B2

    公开(公告)日：2012-09-18

    申请号：US12365195

    申请日：2009-02-04

    申请人： Masato Shiimoto ,  Takeshi Nakagawa ,  Hiroyuki Katada ,  Naoto Ito ,  Kenichi Meguro

    发明人： Masato Shiimoto ,  Takeshi Nakagawa ,  Hiroyuki Katada ,  Naoto Ito ,  Kenichi Meguro

    IPC分类号： G11B5/39

    CPC分类号： G11B5/3909 ,  B82Y10/00 ,  B82Y25/00 ,  G11B5/3912 ,  G11B5/3967 ,  G11B2005/3996

    摘要： A magnetic recording read head is provided capable of achieving high reproduction output, resolution, and SNR, even at a high linear density. There is also provided a magnetic recording and reproducing device capable of achieving sufficient error bit rate. The magnetic recording read head includes a differential read head and a write head. The differential read head has a multilayer structure formed by laminating a first magnetoresistive sensor having a first free layer, a differential gap layer, and a second magnetoresistive sensor having a second free layer. Outside the multilayer structure, a pair of electrodes and a pair of magnetic shields are provided respectively. A ratio (Gl/bl) of an inside distance (Gl) between the first and second free layers to a bit length (bl) is set to 0.6 or more and 1.6 or less.

    摘要翻译： 提供了能够实现高再现输出，分辨率和SNR的磁记录读取头，即使在高线性密度下也是如此。 还提供了能够实现足够的错误比特率的磁记录和再现装置。 磁记录读取头包括差分读取头和写入头。 差分读取头具有层叠具有第一自由层，差分间隙层的第一磁阻传感器和具有第二自由层的第二磁阻传感器形成的多层结构。 在多层结构之外，分别设置一对电极和一对磁屏蔽。 将第一自由层与第二自由层之间的内部距离（G1）与比特长度（b1）的比（G1 / b1）设定为0.6以上且1.6以下。

    Magnetoresistive head with improved in-stack longitudinal biasing layers
    28.
    发明授权
    Magnetoresistive head with improved in-stack longitudinal biasing layers 失效
    具有改进的堆叠纵向偏置层的磁阻头和制造方法

    公开(公告)号：US07535683B2

    公开(公告)日：2009-05-19

    申请号：US10977324

    申请日：2004-10-29

    申请人： Kenichi Meguro ,  Kouichi Nishioka ,  Masahiko Hatatani ,  Chiseki Haginoya

    发明人： Kenichi Meguro ,  Kouichi Nishioka ,  Masahiko Hatatani ,  Chiseki Haginoya

    IPC分类号： G11B5/39 ,  G11B5/127

    CPC分类号： G11B5/3912 ,  G11B5/3932

    摘要： A magnetoresistive head and a fabricating method thereof accomplishing high sensitivity and low noise are provided even if track width narrowing makes progress. In one embodiment, a pinned layer includes a laminate which includes at least two magnetic layers and where adjacent magnetic layers are coupled antiferromagnetically to each other, and a mechanism to apply a longitudinal biasing field to a free layer is made to function by laminating a nonmagnetic separate layer/longitudinal biasing layer/antiferromagnetic layer connecting the free layer and opposite a nonmagnetic conductive layer (or nonmagnetic tunneling barrier layer). Controlling a magnetization direction of the longitudinal biasing layer which bears application of a longitudinal biasing field to the pinned layer and free layer is achieved by annealing carried out while applying a magnetic field in a track width direction and applying a magnetic field at room temperature.

    摘要翻译： 即使进行轨道宽度变窄，也提供了实现高灵敏度和低噪声的磁阻头及其制造方法。 在一个实施例中，钉扎层包括层压体，其包括至少两个磁性层，并且其中相邻磁性层彼此反铁磁耦合，并且通过层叠非磁性的作用将纵向偏置场施加到自由层 连接自由层并且与非磁性导电层（或非磁性隧道势垒层）相对的单独层/纵向偏置层/反铁磁性层。 通过在轨道宽度方向施加磁场并在室温下施加磁场的同时进行退火来控制施加纵向偏置场的纵向偏置层的磁化方向到被钉扎层和自由层。

    CPP structure magnetoresistive head
    29.
    发明授权
    CPP structure magnetoresistive head 有权
    CPP结构磁阻头

    公开(公告)号：US08537503B2

    公开(公告)日：2013-09-17

    申请号：US12547394

    申请日：2009-08-25

    申请人： Katsuro Watanabe ,  Shigeo Fujita ,  Norihiro Ookawa ,  Kenichi Meguro

    发明人： Katsuro Watanabe ,  Shigeo Fujita ,  Norihiro Ookawa ,  Kenichi Meguro

    IPC分类号： G11B5/33

    CPC分类号： G01R33/093 ,  B82Y25/00 ,  G11B5/398 ,  G11B5/40

    摘要： According to one embodiment, a magnetoresistive head has a magnetoresistive sensor film between a lower shield layer and an upper shield layer. The magnetoresistive sensor film is formed by stacking at least a pinning layer, a first ferromagnetic layer, an intermediate layer, and a second ferromagnetic layer, in which a sense current flows so as to pass through an interface between the intermediate layer and the second ferromagnetic layer, and a resistance change of the magnetoresistive sensor film in accordance with the change of an external magnetic field is detected. Also, a lateral side metal layer having an electric resistivity lower than the electric resistivity of the pinning layer is disposed at least on a side wall of the pinning layer among side walls of layers constituting the magnetoresistive sensor film, the lateral side metal layer being in contact with the lower shield layer. Other embodiments are described as well.

    摘要翻译： 根据一个实施例，磁阻头在下屏蔽层和上屏蔽层之间具有磁阻传感器膜。 磁阻传感器膜通过堆叠至少一个感测电流流过的钉扎层，第一铁磁层，中间层和第二铁磁层形成，以便穿过中间层和第二铁磁体之间的界面 层，并且检测到根据外部磁场的变化的磁阻传感器膜的电阻变化。 此外，具有低于钉扎层的电阻率的电阻率的侧面金属层至少设置在构成磁阻传感器膜的层的侧壁中的钉扎层的侧壁上，侧面金属层位于 与下屏蔽层接触。 还描述了其它实施例。