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    Magnetic recording medium, method for producing the same, and magnetic storage apparatus
    2.
    发明授权
    Magnetic recording medium, method for producing the same, and magnetic storage apparatus 失效
    磁记录介质，其制造方法和磁存储装置

    公开(公告)号：US06815098B2

    公开(公告)日：2004-11-09

    申请号：US10411299

    申请日：2003-04-11

    申请人： Satoshi Matsunuma ,  Akira Yano ,  Tsuyoshi Onuma ,  Takanobu Takayama ,  Harumi Hieida ,  Kouichirou Wakabayashi

    发明人： Satoshi Matsunuma ,  Akira Yano ,  Tsuyoshi Onuma ,  Takanobu Takayama ,  Harumi Hieida ,  Kouichirou Wakabayashi

    IPC分类号： G11B566

    CPC分类号： G11B5/00 ,  G11B5/012 ,  G11B5/66 ,  G11B5/74 ,  G11B5/851 ,  Y10S428/90 ,  Y10T428/12465 ,  Y10T428/12868 ,  Y10T428/265

    摘要： A magnetic recording medium comprises, on a substrate, a soft magnetic layer, a first seed layer, a second seed layer, and a recording layer having an artificial lattice structure. The first seed layer contains oxide of Fe. The second seed layer contains one of Pd and Pt, Si, and N. The magnetic exchange coupling force in the in-plane direction of the recording layer is weakened by the first seed layer and the second seed layer. Accordingly, minute recording magnetic domains can be formed in the recording layer, and the magnetization transition area is distinct as well. Even when information is recorded at a high density, the information can be reproduced with low noise. A magnetic storage apparatus, which is provided with such a magnetic recording medium, makes it possible to achieve an areal recording density of 150 gigabits/square inch.

    摘要翻译： 磁记录介质在基板上包括软磁层，第一晶种层，第二晶种层和具有人造晶格结构的记录层。 第一种子层含有Fe的氧化物。 第二种子层包含Pd和Pt，Si和N中的一个。记录层的面内方向上的磁交换耦合力被第一种子层和第二种子层削弱。 因此，可以在记录层中形成分钟记录磁畴，并且磁化过渡区也是不同的。 即使当以高密度记录信息时，可以以低噪声再现信息。 具有这种磁记录介质的磁存储装置使得可以实现150吉比特/平方英寸的面积记录密度。

    Information recording medium with magnetic marks, recording and reproducing apparatus therefor, and head positioning method using detected magnetic leakage fields from the magnetic marks
    4.
    发明授权
    Information recording medium with magnetic marks, recording and reproducing apparatus therefor, and head positioning method using detected magnetic leakage fields from the magnetic marks 失效
    具有磁痕的信息记录介质，其记录和再现装置以及使用来自磁痕的检测到的磁泄漏场的磁头定位方法

    公开(公告)号：US06970400B1

    公开(公告)日：2005-11-29

    申请号：US09671478

    申请日：2000-09-27

    申请人： Kouichirou Wakabayashi ,  Tsuyoshi Onuma ,  Teruaki Takeuchi ,  Nobuyuki Inaba ,  Fumiyoshi Kirino

    发明人： Kouichirou Wakabayashi ,  Tsuyoshi Onuma ,  Teruaki Takeuchi ,  Nobuyuki Inaba ,  Fumiyoshi Kirino

    IPC分类号： G11B5/00 ,  G11B5/012 ,  G11B5/48 ,  G11B5/55 ,  G11B5/596 ,  G11B5/74 ,  G11B5/82 ,  G11B11/00 ,  G11B13/04

    CPC分类号： G11B13/045 ,  G11B5/012 ,  G11B5/488 ,  G11B5/5526 ,  G11B5/59677 ,  G11B5/74 ,  G11B5/82 ,  G11B2005/0002 ,  G11B2005/0005 ,  G11B2005/0021

    摘要： A recording and reproducing apparatus including a recording magnetic head and a reproducing magnetic head with their floating height lowered for high density recordation and reproduction is provided. An information recording medium is provided on which it is possible to densely record information and from which it is possible to densely reproduce information by lowering the floating height of the recording and reproducing heads. The information recording medium includes a flat substrate and a recording layer provided on the substrate. Servo patterns and management information are recorded as magnetic marks on the recording layer in advance by a servo writer or the like. Because the substrate needs no recessed and embossed patterns formed in it, the slider of the recording and reproducing apparatus can be floated at a constant floating height lower than conventionally over the whole area of the medium. During information recordation, the position of the slider is controlled on the basis of the magneto-optical signals from the magnetic marks. During information reproduction, the reproducing magnetic head controls the slider position on the basis of the magnetic leakage fields leaking from the magnetic marks.

    摘要翻译： 提供包括记录磁头和其浮动高度降低以用于高密度记录和再现的再现磁头的记录和再现装置。 提供一种信息记录介质，在该信息记录介质上可以密集地记录信息，并且可以通过降低记录和再现磁头的浮动高度从而可以密集地再现信息。 信息记录介质包括平坦基板和设置在基板上的记录层。 伺服模式和管理信息通过伺服写入器等预先记录在记录层上作为磁标记。 因为基板不需要在其中形成凹陷和压花图案，所以记录和再现装置的滑动件可以浮动在比传统的介质整个区域以下的恒定浮动高度。 在信息记录期间，滑块的位置是根据来自磁痕的磁光信号进行控制的。 在信息再现期间，再现磁头基于从磁痕泄漏的磁泄漏场来控制滑块位置。

    Magnetic recording medium and its production method, and magnetic recorder
    5.
    发明授权
    Magnetic recording medium and its production method, and magnetic recorder 失效
    磁记录介质及其制作方法，磁记录仪

    公开(公告)号：US06730421B1

    公开(公告)日：2004-05-04

    申请号：US09959855

    申请日：2001-11-09

    申请人： Fumiyoshi Kirino ,  Nobuyuki Inaba ,  Teruaki Takeuchi ,  Kouichirou Wakabayashi

    发明人： Fumiyoshi Kirino ,  Nobuyuki Inaba ,  Teruaki Takeuchi ,  Kouichirou Wakabayashi

    IPC分类号： G11B566

    CPC分类号： G11B5/667 ,  G11B5/72 ,  G11B5/732 ,  G11B5/7325 ,  G11B5/8404 ,  Y10S428/90 ,  Y10T428/12465 ,  Y10T428/12854 ,  Y10T428/265

    摘要： A magnetic recording medium (300) includes a substrate (1) and on the substrate (1) a first underlying layer (32), a second underlying layer (33), a magnetic layer (34), and a protective layer (35). Because of the existence of the first underlying layer (32) of Hf, initial growth layer having no specific crystal structure is prevented from growing in the second underlying layer (33). The second underlying layer (33) has a structure in which CoO particles having a cross section of a regular hexagon and separated by SiO2 portion are arranged in honeycomb. Since magnetic particles are epitaxially grown from CoO particles, the size of the magnetic particles and particle size distribution can be controlled, and the magnetic interaction between magnetic particles can be lessened. The underlying layer (33) and the protective layer (35) are formed by ECR sputtering. Such a magnetic recording medium is free from noise and thermal fluctuation, and ultrahigh recording density over 40 Gbit/inch2 is realized.

    摘要翻译： 磁记录介质（300）包括基板（1）和基板（1）上的第一下层（32），第二下层（33），磁性层（34）和保护层（35） 。 由于Hf的第一下层（32）的存在，防止了在第二下层（33）中不具有特定晶体结构的初始生长层。 第二基底层（33）具有其中具有正六边形横截面并由SiO 2部分分离的CoO颗粒被布置成蜂巢状的结构。 由于磁性颗粒从CoO颗粒外延生长，因此可以控制磁性颗粒的尺寸和颗粒尺寸分布，并且可以减小磁性颗粒之间的磁性相互作用。 通过ECR溅射形成下层（33）和保护层（35）。 这样的磁记录介质没有噪声和热波动，并且实现超过40Gbit / inch 2的超高记录密度。

    Read/write head and magnetic recording device
    6.
    发明授权
    Read/write head and magnetic recording device 失效
    读/写磁头和磁记录装置

    公开(公告)号：US06674594B1

    公开(公告)日：2004-01-06

    申请号：US10031338

    申请日：2002-01-25

    申请人： Kouichirou Wakabayashi ,  Teruaki Takeuchi ,  Nobuyuki Inaba

    发明人： Kouichirou Wakabayashi ,  Teruaki Takeuchi ,  Nobuyuki Inaba

    IPC分类号： G11B502

    CPC分类号： G11B5/127 ,  G11B5/00 ,  G11B5/012 ,  G11B5/3103 ,  G11B5/3967 ,  G11B5/4886 ,  G11B5/596 ,  G11B5/59627 ,  G11B5/59655 ,  G11B5/59683 ,  G11B13/045 ,  G11B2005/0002 ,  G11B2005/0005 ,  G11B2005/0021

    摘要： A magnetic recording apparatus includes a laser light source (132), a recording magnetic head (131) and a magnetoresistive element. The recording magnetic head includes a pair of magnetic poles (100 and 101), between which the magnetoresistive element is interposed. A rotary actuator (Sa) positions the recording magnetic head at a desired track of a magnetic recording medium. A laser beam can be radiated onto the magnetic recording medium to raise the temperature of a region (302) of the medium. This region has a width of the order of the track width. The raised temperature lowers the coercive force of this region, where a recording magnetic field can be applied for high density recording. The rotary actuator may form a yaw angle (&thgr;) with a track of the magnetic recording medium. Even in this case, the recording magnetic head (131) and the reproducing element have no tracking offset from the code track. In addition, if the size of the magnetic poles (100 and 101) of the recording magnetic head are set within a predetermined range, the region (302) heated by the laser beam does not deviate from a recording magnetic field application region (303).

    摘要翻译： 磁记录装置包括激光源（132），记录磁头（131）和磁阻元件。 记录磁头包括一对磁极（100和101），磁阻元件插在其间。 旋转致动器（Sa）将记录磁头定位在磁记录介质的期望轨道处。 可以将激光束照射到磁记录介质上以升高介质的区域（302）的温度。 该区域具有轨道宽度顺序的宽度。 升高的温度降低了该区域的矫顽力，其中可以应用记录磁场用于高密度记录。 旋转致动器可以与磁记录介质的轨道形成偏航角（θ）。 即使在这种情况下，记录磁头（131）和再现元件也没有跟踪轨迹的跟踪偏移。 此外，如果将记录磁头的磁极（100和101）的尺寸设定在预定范围内，则由激光束加热的区域（302）不会偏离记录磁场施加区域（303） 。