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    Magnetic recording/reproducing device with a function of correcting waveform of magnetoresistive-effect head
    2.
    发明授权
    Magnetic recording/reproducing device with a function of correcting waveform of magnetoresistive-effect head 失效
    具有校正磁阻效应头的波形功能的磁记录/重放装置

    公开(公告)号：US5969896A

    公开(公告)日：1999-10-19

    申请号：US778761

    申请日：1997-01-06

    申请人： Kazuhiro Nakamoto ,  Yoshiaki Kawato ,  Hiroshi Fukui ,  Hiroyuki Hoshiya

    发明人： Kazuhiro Nakamoto ,  Yoshiaki Kawato ,  Hiroshi Fukui ,  Hiroyuki Hoshiya

    IPC分类号： G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/39 ,  G11B5/465 ,  G11B5/03

    CPC分类号： G11B5/012 ,  B82Y10/00 ,  B82Y25/00 ,  G11B5/02 ,  G11B5/465 ,  G11B2005/0008 ,  G11B2005/001 ,  G11B2005/0016 ,  G11B2005/3996

    摘要： A magnetic recording/reproducing device has an inductive write element provided with a coil and magnetic cores for recording information on a medium, a magnetoresistive read element for transducing a change in a magnetic field leaking from a medium, on which information is recorded, into an electrical signal, a detector for detecting an output signal of the read element, a bias field applying unit for applying a bias field to the read element, and a recording/reproducing operation controller for reproducing information based on an output signal from the read element and for controlling the recording current applying unit based on an inputted signal to record information. The recording/reproducing operation control unit has a stabilizing unit for controlling the bias field applying unit to make an absolute value of the bias field in a state where a magnetic field leaking from the medium is applied to the read element larger than that during a normal reproducing operation.

    摘要翻译： 磁记录/再现装置具有设置有线圈的感应写入元件和用于在介质上记录信息的磁芯，用于将从记录有信息的介质泄漏的磁场的变化转换成磁阻读取元件的磁阻读取元件 电信号，用于检测读取元件的输出信号的检测器，用于向读取元件施加偏置场的偏置场施加单元，以及用于基于来自读取元件的输出信号再现信息的记录/再现操作控制器，以及 用于基于输入的信号控制记录电流施加单元以记录信息。 记录/再现操作控制单元具有稳定单元，用于控制偏置场施加单元，以使得从介质泄漏的磁场到读取元件的状态中的偏置场的绝对值大于正常情况下的偏移场的绝对值 再现操作。

    ANGLE SENSOR, ANGLE SENSOR MANUFACTURING METHOD, AND ANGLE DETECTION DEVICE USING THE ANGLE SENSOR
    3.
    发明申请
    ANGLE SENSOR, ANGLE SENSOR MANUFACTURING METHOD, AND ANGLE DETECTION DEVICE USING THE ANGLE SENSOR 有权
    角度传感器，角度传感器制造方法和使用角度传感器的角度检测装置

    公开(公告)号：US20100327857A1

    公开(公告)日：2010-12-30

    申请号：US12864997

    申请日：2008-12-03

    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： G01B7/30

    CPC分类号： G01R33/093 ,  B82Y25/00 ,  G01R33/098

    摘要： There is provided an angle sensor and angle detection device of high output and high accuracy with a wide operating temperature range. First through eighth sensor units 511, 522, 523, 514, 531, 542, 543 and 534 are produced from spin valve magnetoresistive films that use a self-pinned type ferromagnetic pinned layer comprising two layers of ferromagnetic films that are strongly and anti-ferromagnetically coupled. The respective sensor units are produced via the formation and patterning of thin-films magnetized at angles that differ by 90°, and the formation of insulation films. By using, for the ferromagnetic films, CoFe and FeCo films that have similar Curie temperatures to make the difference in magnetization amount be zero, high immunity to external magnetic fields, a broad adaptive temperature range, and high output are realized.

    摘要翻译： 在宽工作温度范围内提供高输出和高精度的角度传感器和角度检测装置。 第一至第八传感器单元511,522,543,514,531,542,543和534由自旋阀磁阻膜制造，该自旋阀磁阻膜使用包括两层强磁性和反铁磁性的铁磁性薄膜的自固定型铁磁性钉扎层 耦合。 相应的传感器单元通过以不同于90°的角度磁化的薄膜的形成和图案化以及形成绝缘膜来制造。 通过对铁磁膜使用具有相似居里温度的CoFe和FeCo膜，使磁化强度的差异为零，实现了对外部磁场的高抗扰性，宽适应温度范围和高输出。

    Magnetoresistive effect head
    6.
    发明授权
    Magnetoresistive effect head 失效
    磁阻效应头

    公开(公告)号：US06731478B2

    公开(公告)日：2004-05-04

    申请号：US10400622

    申请日：2003-03-28

    申请人： Kazuhiro Nakamoto ,  Yoshiaki Kawato

    发明人： Kazuhiro Nakamoto ,  Yoshiaki Kawato

    IPC分类号： G11B539

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3903 ,  G11B5/3932 ,  G11B5/399 ,  G11B2005/3996

    摘要： A slider includes an air-introducing plane, a groove, an air flow-out end, and a thin-film magnetic head formed on the air flow-out end. The thin-film magnetic head includes a magnetoresistive effect type film which includes a first ferromagnetic film having a direction of magnetization which is changeable, an antiferromagnetic film, a second ferromagnetic film having a direction of magnetization which is fixed, and a non-magnetic conductive film disposed between the first ferromagnetic film and the second ferromagnetic film. The thin-film magnetic head further includes a pair of magnetic domain control films respectively arranged at ends of the magnetoresistive effect type film, and a pair of electrodes directly overlapping both end domains of the magnetoresistive effect type film. A spacing between the electrodes is narrower than a spacing between the magnetic domain control films.

    摘要翻译： 滑块包括形成在空气流出端的空气引入平面，凹槽，空气流出端和薄膜磁头。 薄膜磁头包括磁阻效应型膜，其包括具有可变化的磁化方向的第一铁磁膜，反铁磁膜，具有固定的磁化方向的第二铁磁膜和非磁性导电 膜设置在第一铁磁膜和第二铁磁膜之间。 薄膜磁头还包括分别布置在磁阻效应型膜的端部的一对磁畴控制膜和直接与磁阻效应型膜的两端畴重叠的一对电极。 电极之间的间隔比磁畴控制膜之间的间隔窄。

    Magnetoresistive effect head
    8.
    发明授权
    Magnetoresistive effect head 有权

    公开(公告)号：US06545847B2

    公开(公告)日：2003-04-08

    申请号：US10021094

    申请日：2001-12-19

    申请人： Kazuhiro Nakamoto ,  Yoshiaki Kawato

    发明人： Kazuhiro Nakamoto ,  Yoshiaki Kawato

    IPC分类号： G11B539

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3903 ,  G11B5/3932 ,  G11B5/399 ,  G11B2005/3996

    摘要： A magnetic head includes a magnetoresistive effect type film, which includes a first ferromagnetic film having a direction of magnetization which is changeable, an antiferromagnetic film, a second ferromagnetic film having a direction of magnetization which is fixed, and a non-magnetic conductive film disposed between the first ferromagnetic film and the second ferromagnetic film. The magnetic head further includes a pair of magnetic domain control films respectively arranged at ends of the magnetoresistive effect type film, and a pair of electrodes respectively arranged at the ends of the magnetoresistive effect type film. A spacing between the electrodes is narrower than a spacing between the magnetic domain control films.

    Magnetic head with shield layer having discontinuous multi-layer or mixed layer and magnetic recording apparatus utilizing the magnetic head
    9.
    发明授权
    Magnetic head with shield layer having discontinuous multi-layer or mixed layer and magnetic recording apparatus utilizing the magnetic head 失效
    具有具有不连续的多层或混合层的屏蔽层的磁头和利用磁头的磁记录装置

    公开(公告)号：US06456466B1

    公开(公告)日：2002-09-24

    申请号：US09531466

    申请日：2000-03-20

    申请人： Kazuhiro Nakamoto ,  Hiroyuki Hoshiya ,  Takashi Kawabe ,  Hiromasa Takahashi ,  Hisashi Kimura ,  Katsuro Watanabe ,  Chiaki Ishikawa ,  Kaori Totsuka

    发明人： Kazuhiro Nakamoto ,  Hiroyuki Hoshiya ,  Takashi Kawabe ,  Hiromasa Takahashi ,  Hisashi Kimura ,  Katsuro Watanabe ,  Chiaki Ishikawa ,  Kaori Totsuka

    IPC分类号： G11B5127

    CPC分类号： G11B5/3903 ,  G11B5/40

    摘要： The present invention is to realize a magnetic recording and reproducing apparatus in which even if a spacing between shields of a magnetic head is narrowed, a deterioration in characteristic caused by a short-circuiting between a magnetoresistive layer and a magnetic shield layer is prevented to provide a high recording density. The present invention comprises an upper shield layer 15, a lower shield layer 13,and a magnetoresistive layer 14 arranged therebetween. Further, there is provided a constitution in which one or both shield layers has (have) a high resistance layer comprising a mixed layer of ferromagnetic metal and an insulating material, or a discontinuous multi-layer having a plurality of ferromagnetic metal layers and a plurality of insulating material layers laminated alternately, to prevent a deterioration in characteristic caused by a short-circuiting.

    摘要翻译： 本发明是为了实现磁记录和重放装置，其中即使磁头的屏蔽之间的间隔变窄，防止了由磁阻层和磁屏蔽层之间的短路引起的特性劣化，从而提供 高记录密度。 本发明包括上屏蔽层15，下屏蔽层13和布置在其间的磁阻层14。 此外，提供一种或两个屏蔽层具有包含强磁性金属和绝缘材料的混合层的高电阻层或具有多个强磁性金属层和多个绝缘材料的不连续多层的结构 的交替层叠的绝缘材料层，以防止由短路导致的特性劣化。

    Thin film perpendicular magnetic recording head, their fabrication process and magnetic disk drive using it
    10.
    发明授权
    Thin film perpendicular magnetic recording head, their fabrication process and magnetic disk drive using it 有权
    薄膜垂直磁记录头，其制造工艺和使用它的磁盘驱动器

    公开(公告)号：US07813079B2

    公开(公告)日：2010-10-12

    申请号：US12255306

    申请日：2008-10-21

    申请人： Yoshiaki Kawato ,  Kazuhiro Nakamoto ,  Hiroyuki Hoshiya ,  Yasuyuki Okada ,  Masafumi Mochizuki

    发明人： Yoshiaki Kawato ,  Kazuhiro Nakamoto ,  Hiroyuki Hoshiya ,  Yasuyuki Okada ,  Masafumi Mochizuki

    IPC分类号： G11B5/147 ,  G11B5/127

    CPC分类号： G11B5/3906 ,  G11B5/1278

    摘要： Thin film perpendicular magnetic head with a narrow main pole capable of a high recording density in excess of 100 gigabits per square inch and generating a high magnetic recording field, while also being modified to suppress remanent magnetic fields occurring immediately after writing operation. A return path is provided for supplying a magnetic flux to the main pole, and an conductive coil for excitation of the main pole and return path. The main pole has a pole width of 200 nanometers or less, and a magnetic multilayer made up of a high saturation flux density layer and low saturation flux density layer. The low saturation flux density layer and the high saturation flux density suppress remanent magnetization and prevent erasing after writing by utilizing a closed magnetic domain structure in the pole.

    摘要翻译： 具有超过100吉比特/平方英寸的高记录密度的窄主极的薄膜垂直磁头，并产生高磁记录场，同时还进行修改以抑制在写入操作之后立即发生的剩余磁场。 提供用于向主极提供磁通量的返回路径和用于激励主极和返回路径的导电线圈。 主极的极宽为200nm以下，由高饱和磁通密度层和低饱和磁通密度层构成的磁性层叠体。 低饱和磁通密度层和高饱和磁通密度通过利用磁极中的闭合磁畴结构来抑制剩磁，并防止写入后的擦除。