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    Magnetic storage apparatus, head drive controller, and head drive control method
    1.
    发明授权
    Magnetic storage apparatus, head drive controller, and head drive control method 有权
    磁存储装置，头驱动控制器和头驱动控制方法

    公开(公告)号：US08643972B2

    公开(公告)日：2014-02-04

    申请号：US13401884

    申请日：2012-02-22

    申请人： Yoshihiro Shiroishi ,  Hiroshi Fukuda ,  Ikuya Tagawa ,  Tomohiro Okada

    发明人： Yoshihiro Shiroishi ,  Hiroshi Fukuda ,  Ikuya Tagawa ,  Tomohiro Okada

    IPC分类号： G11B11/00

    CPC分类号： G11B5/3146 ,  G11B5/607 ,  G11B2005/0024

    摘要： A magnetic storage apparatus includes a magnetic recording medium, a microwave assisted magnetic recording head at least equipped with a magnetic recording pole that generates a recording magnetic field for writing to the magnetic recording medium and a high-frequency oscillator that generates a high-frequency field, a magnetic reproducing head that reads information from the magnetic recording medium, a signal processing unit that processes a signal written by the magnetic recording head and a signal read by the magnetic reproducing head and a unit that controls clearance between the high-frequency oscillator and the magnetic recording medium. The magnetic storage apparatus has a characteristic that the high-frequency oscillator is not operated except in recording.

    摘要翻译： 一种磁存储装置，包括磁记录介质，至少配备有磁记录磁极的微波辅助磁记录头，该记录磁极产生用于向磁记录介质写入的记录磁场和产生高频场的高频振荡器 从磁记录介质读取信息的磁再现头，处理由磁记录头写入的信号的信号处理单元和由磁再现头读出的信号，以及控制高频振荡器和 磁记录介质。 磁存储装置具有除了记录以外高频振荡器不工作的特征。

    MAGNETIC STORAGE APPARATUS, HEAD DRIVE CONTROLLER, AND HEAD DRIVE CONTROL METHOD
    2.
    发明申请
    MAGNETIC STORAGE APPARATUS, HEAD DRIVE CONTROLLER, AND HEAD DRIVE CONTROL METHOD 有权
    磁力储存装置，头驱动控制器和头驱动控制方法

    公开(公告)号：US20130083423A1

    公开(公告)日：2013-04-04

    申请号：US13401884

    申请日：2012-02-22

    申请人： Yoshihiro Shiroishi ,  Hiroshi Fukuda ,  Ikuya Tagawa ,  Tomohiro Okada

    发明人： Yoshihiro Shiroishi ,  Hiroshi Fukuda ,  Ikuya Tagawa ,  Tomohiro Okada

    IPC分类号： G11B21/02

    CPC分类号： G11B5/3146 ,  G11B5/607 ,  G11B2005/0024

    摘要： A magnetic storage apparatus includes a magnetic recording medium, a microwave assisted magnetic recording head at least equipped with a magnetic recording pole that generates a recording magnetic field for writing to the magnetic recording medium and a high-frequency oscillator that generates a high-frequency field, a magnetic reproducing head that reads information from the magnetic recording medium, a signal processing unit that processes a signal written by the magnetic recording head and a signal read by the magnetic reproducing head and a unit that controls clearance between the high-frequency oscillator and the magnetic recording medium. The magnetic storage apparatus has a characteristic that the high-frequency oscillator is not operated except in recording.

    摘要翻译： 一种磁存储装置，包括磁记录介质，至少配备有磁记录磁极的微波辅助磁记录头，该记录磁极产生用于向磁记录介质写入的记录磁场和产生高频场的高频振荡器 从磁记录介质读取信息的磁再现头，处理由磁记录头写入的信号的信号处理单元和由磁再现头读出的信号，以及控制高频振荡器和 磁记录介质。 磁存储装置具有除了记录以外高频振荡器不工作的特征。

    Energy-assisted magnetic recording head and systems thereof with environmental conditions control
    3.
    发明授权
    Energy-assisted magnetic recording head and systems thereof with environmental conditions control 有权
    能量磁记录头及其系统具有环境条件控制

    公开(公告)号：US08760779B2

    公开(公告)日：2014-06-24

    申请号：US13341098

    申请日：2011-12-30

    申请人： William D. Johns ,  David L. Whitaker ,  Ikuya Tagawa ,  Yoshihiro Shiroishi

    发明人： William D. Johns ,  David L. Whitaker ,  Ikuya Tagawa ,  Yoshihiro Shiroishi

    IPC分类号： G11B5/02 ,  G11B27/36

    CPC分类号： G11B5/1278 ,  G11B5/3133 ,  G11B5/6088 ,  G11B2005/0021 ,  G11B2005/0024

    摘要： In one embodiment, a system includes a medium, a magnetic head having a write element adapted for writing data to the medium, a MAMR element and/or a TAMR element adapted for assisting recording on the medium, the MAMR element having a microwave-generating portion that receives current for operation thereof, the TAMR element having a localized heat-generating portion that receives current for operation thereof, and a read element adapted for reading data from the medium, a device adapted for measuring environmental conditions relating to the TAMR/MAMR elements and the medium, and a controller adapted for controlling operation of the magnetic head and adjusting operating parameters of the system based on the environmental conditions. The environmental conditions include temperature, a reproduced signal of the read element, and/or clearance between the TAMR/MAMR elements and the medium. The operating parameters include the clearance, amount of current injected to the TAMR/MAMR elements, and/or write current.

    摘要翻译： 在一个实施例中，系统包括介质，具有适于向介质写入数据的写入元件的磁头，适于在介质上辅助记录的MAMR元件和/或TAMR元件，所述MAMR元件具有微波产生 接收用于其操作的电流的部分，所述TAMR元件具有接收用于其操作的电流的局部热产生部分和适于从所述介质读取数据的读取元件，适于测量与所述TAMR / MAMR有关的环境条件的装置 元件和介质，以及控制器，其适于控制磁头的操作并且基于环境条件调整系统的操作参数。 环境条件包括温度，读取元件的再生信号和/或TAMR / MAMR元件与介质之间的间隙。 操作参数包括间隙，注入到TAMR / MAMR元件的电流量和/或写入电流。

    MICROWAVE-ASSISTED MAGNETIC RECORDING HEAD AND SYSTEMS THEREOF WITH ENVIRONMENTAL CONDITIONS CONTROL
    4.
    发明申请
    MICROWAVE-ASSISTED MAGNETIC RECORDING HEAD AND SYSTEMS THEREOF WITH ENVIRONMENTAL CONDITIONS CONTROL 有权
    微波辅助磁记录头及其环境条件控制系统

    公开(公告)号：US20130170060A1

    公开(公告)日：2013-07-04

    申请号：US13341098

    申请日：2011-12-30

    申请人： William D. Johns ,  David L. Whitaker, JR. ,  Ikuya Tagawa ,  Yoshihiro Shiroishi

    发明人： William D. Johns ,  David L. Whitaker, JR. ,  Ikuya Tagawa ,  Yoshihiro Shiroishi

    IPC分类号： G11B5/02 ,  G11B27/36

    CPC分类号： G11B5/1278 ,  G11B5/3133 ,  G11B5/6088 ,  G11B2005/0021 ,  G11B2005/0024

    摘要： In one embodiment, a system includes a medium, a magnetic head having a write element adapted for writing data to the medium, a MAMR element and/or a TAMR element adapted for assisting recording on the medium, the MAMR element having a microwave-generating portion that receives current for operation thereof, the TAMR element having a localized heat-generating portion that receives current for operation thereof, and a read element adapted for reading data from the medium, a device adapted for measuring environmental conditions relating to the TAMR/MAMR elements and the medium, and a controller adapted for controlling operation of the magnetic head and adjusting operating parameters of the system based on the environmental conditions. The environmental conditions include temperature, a reproduced signal of the read element, and/or clearance between the TAMR/MAMR elements and the medium. The operating parameters include the clearance, amount of current injected to the TAMR/MAMR elements, and/or write current.

    摘要翻译： 在一个实施例中，系统包括介质，具有适于向介质写入数据的写入元件的磁头，适于在介质上辅助记录的MAMR元件和/或TAMR元件，所述MAMR元件具有微波产生 接收用于其操作的电流的部分，所述TAMR元件具有接收用于其操作的电流的局部热产生部分和适于从所述介质读取数据的读取元件，适于测量与所述TAMR / MAMR有关的环境条件的装置 元件和介质，以及控制器，其适于控制磁头的操作并且基于环境条件调整系统的操作参数。 环境条件包括温度，读取元件的再生信号和/或TAMR / MAMR元件与介质之间的间隙。 操作参数包括间隙，注入到TAMR / MAMR元件的电流量和/或写入电流。

    Magnetic recording and reading device
    5.
    发明授权
    Magnetic recording and reading device 有权
    磁记录读取装置

    公开(公告)号：US07903374B2

    公开(公告)日：2011-03-08

    申请号：US12816093

    申请日：2010-06-15

    申请人： Yoshihiro Shiroishi

    发明人： Yoshihiro Shiroishi

    IPC分类号： G11B5/147

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/00 ,  G11B5/09 ,  G11B5/313 ,  G11B5/3909 ,  G11B5/3967 ,  G11B5/484 ,  G11B5/656 ,  G11B5/66 ,  G11B5/7325 ,  G11B2005/0002 ,  G11B2005/0005 ,  G11B2005/3996

    摘要： A magnetic recording and reading device includes a perpendicular magnetic recording medium, a perpendicular magnetic head having a recording head width having a heat-generating portion and a reading head, a fine adjustment portion, and a R/W-IC. The perpendicular magnetic head is configured to perform magnetic recording on the recording medium while locally heating the recording medium so as to enable a change of the coercive force of the recording medium during the recording after correcting of the position of the perpendicular magnetic head by the fine adjustment portion is completed, and to perform reading of the magnetic recording information with the aid of the reading head after correcting of the position of the perpendicular magnetic head by the fine adjustment portion is completed.

    摘要翻译： 磁记录和读取装置包括垂直磁记录介质，具有发热部分和读头的记录头宽度的垂直磁头，微调部分和R / W-IC。 垂直磁头被配置为在记录介质上执行磁记录，同时局部加热记录介质，以便在校正垂直磁头的位置之后能够在记录期间改变记录介质的矫顽力 调整部分完成，并且在通过微调部分校正垂直磁头的位置之后，借助于读取头来执行磁记录信息的读取。

    Magnetic recording medium, process for producing the same and magnetic recording system
    6.
    发明授权
    Magnetic recording medium, process for producing the same and magnetic recording system 失效
    磁记录介质，制造过程及磁记录系统

    公开(公告)号：US5815343A

    公开(公告)日：1998-09-29

    申请号：US967346

    申请日：1997-10-27

    申请人： Akira Ishikawa ,  Yoshihiro Shiroishi ,  Yuzuru Hosoe ,  Yotsuo Yahisa ,  Tomoo Yamamoto ,  Masukazu Igarashi ,  Akira Osaki ,  Yoshiki Kato ,  Jun Fumioka

    发明人： Akira Ishikawa ,  Yoshihiro Shiroishi ,  Yuzuru Hosoe ,  Yotsuo Yahisa ,  Tomoo Yamamoto ,  Masukazu Igarashi ,  Akira Osaki ,  Yoshiki Kato ,  Jun Fumioka

    IPC分类号： G11B5/012 ,  G11B5/39 ,  G11B5/62 ,  G11B5/64 ,  G11B5/66 ,  G11B5/73 ,  G11B5/84 ,  G11B5/78 ,  G11B5/82 ,  G11B17/00

    CPC分类号： G11B5/012 ,  G11B5/39 ,  G11B5/64 ,  G11B5/656 ,  G11B5/66 ,  G11B5/7315 ,  G11B5/7325 ,  G11B5/8404

    摘要： A magnetic recording medium includes a non-magnetic substrate, and a magnetic layer provided on the non-magnetic substrate. The value of the product Br.sub.1 .delta. of the residual flux density Br.sub.1 of the magnetic layer determined in a recording direction and the thickness .delta. of the magnetic layer is not less than 5 G.mu.m and not more than 180 G.mu.m; the value of the ratio of Br.sub.1 to the residual flux density Br.sub.2 determined in a direction parallel to the substrate plane and perpendicular to the recording direction, Br.sub.1 /Br.sub.2, is not less than 1.3 and not more than 3; the surface of the non-magnetic substrate has texture grooves therein extending predominantly in the recording direction; and the average roughness factor Ra of the surface of the magnetic layer determined in a direction perpendicular to the substrate plane and perpendicular to the recording direction is not less than 0.3 nm and not more than 1.9 nm. Alternatively, the value of the product Br.delta. of the residual flux density Br of the magnetic layer determined in the recording direction and the thickness .delta. of the magnetic layer is not less than 5 G.mu.m and not more than 80 G.mu.m; and the value of the anisotropic magnetic field H.sub.k of the magnetic recording medium is not less than 7 kOe and not more than 20 kOe.

    摘要翻译： 磁记录介质包括非磁性衬底和设置在非磁性衬底上的磁性层。 在记录方向上确定的磁性层的剩余磁通密度Br1和磁性层的厚度δ的乘积Br1δ的值不小于5Gm且不大于180Gm; 在平行于基板平面并垂直于记录方向Br1 / Br2的方向上确定的Br1与剩余通量密度Br2的比值不小于1.3且不大于3; 非磁性基板的表面具有主要在记录方向上延伸的织构槽; 并且在垂直于基板平面并垂直于记录方向的方向上确定的磁性层的表面的平均粗糙度Ra不小于0.3nm且不大于1.9nm。 或者，在记录方向上确定的磁性层的剩余磁通密度Br和磁性层的厚度δ的乘积Br delta的值不小于5Gm且不大于80Gm; 并且磁记录介质的各向异性磁场Hk的值不小于7kOe且不大于20kOe。

    Thin-film magnetic head
    9.
    发明授权
    Thin-film magnetic head 失效
    薄膜磁头

    公开(公告)号：US4651248A

    公开(公告)日：1987-03-17

    申请号：US500907

    申请日：1983-06-03

    申请人： Kazuo Shiiki ,  Yoshihiro Shiroishi ,  Isamu Yuito ,  Kiminari Shinagawa ,  Hideo Fujiwara

    发明人： Kazuo Shiiki ,  Yoshihiro Shiroishi ,  Isamu Yuito ,  Kiminari Shinagawa ,  Hideo Fujiwara

    IPC分类号： G11B5/127 ,  G11B5/17 ,  G11B5/31 ,  G11B5/23 ,  G11B5/147 ,  G11B5/187

    CPC分类号： G11B5/3143 ,  G11B5/1278 ,  G11B5/31

    摘要： A thin-film magnetic head which has a structure wherein a spiral conductor coil having a plurality of turns is disposed between first and second magnetic layers being substantially in parallel with each other, through upper and lower inorganic insulator layers, and in which a part of the outermost turn of the conductor coil is exposed on a face opposite a magnetic recording medium along with the upper and lower inorganic insulator layers, to form a magnetic gap. This head can be readily manufactured by a manufacturing method including the step of forming the outermost turn of the conductor coil on the side of the face opposite the magnetic recording medium so as to be wider than any other part of the conductor coil, and the step of thereafter machining the face opposite the magnetic recording medium so as to expose the outermost turn of the conductor coil on the face opposite the magnetic recording medium. The magnetic head of the present invention is suited to high-density recording, and is high in recording and reproducing efficiencies and also in reliability.

    摘要翻译： 具有以下结构的薄膜磁头：其中具有多个匝的螺旋导体线圈通过上下无机绝缘体层彼此基本上彼此平行地设置在第一和第二磁性层之间，并且其中一部分 导体线圈的最外圈与上下无机绝缘体层一起在与磁记录介质相对的面上露出，形成磁隙。 该头可以容易地通过制造方法制造，该方法包括以下步骤：在与磁记录介质相对的面的一侧形成导体线圈的最外圈，以便比导体线圈的任何其它部分宽，并且步骤 之后加工与磁记录介质相对的面，以便暴露在与磁记录介质相对的表面上的导体线圈的最外圈。 本发明的磁头适用于高密度记录，记录和再现效率高，可靠性高。