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    Magnetic recording medium and magnetic storage device using the same
    63.
    发明授权
    Magnetic recording medium and magnetic storage device using the same 失效
    磁记录介质及使用其的磁存储装置

    公开(公告)号：US06251532B1

    公开(公告)日：2001-06-26

    申请号：US08555415

    申请日：1995-11-09

    申请人： Masaaki Futamoto ,  Nobuyuki Inaba ,  Tomoo Yamamoto ,  Masukazu Igarashi ,  Yuzuru Hosoe ,  Akira Ishikawa

    发明人： Masaaki Futamoto ,  Nobuyuki Inaba ,  Tomoo Yamamoto ,  Masukazu Igarashi ,  Yuzuru Hosoe ,  Akira Ishikawa

    IPC分类号： B32B1501

    CPC分类号： G11B5/656 ,  C22C27/06 ,  G11B5/64 ,  G11B5/66 ,  Y10S428/90

    摘要： A magnetic recording medium capable of reducing noise and an error rate of the medium comprises a nonmagnetic substrate; a magnetic layer formed on the surface of the nonmagnetic substrate directly or through a nonmagnetic underlayer; and a protective layer formed on the magnetic layer. The magnetic recording medium satisfies the following relationships: −0.5≦{Hc(1)−Hc(p)}/Hc(1)≦0.3 Hc(1)≧2 kOe 20 G×&mgr;m≦Br(1)×t≦100 G×&mgr;m where Hc(1) is a corecivity of the magnetic layer measured in the longitudinal direction; Hc(p) is a coercivity of the magnetic layer measured in the perpendicular direction; Br(1) is a remanent magnetization of the magnetic layer measured in the longitudinal direction; and “t” is a layer thickness of the magnetic layer.

    摘要翻译： 能够降低介质的噪声和误差率的磁记录介质包括非磁性衬底; 直接或通过非磁性底层形成在非磁性基片的表面上的磁性层; 以及形成在磁性层上的保护层。 磁记录介质满足以下关系：-0.5 <= {Hc（1）-Hc（p）} / Hc（1）<= 0.3Hc（1）> = 2 kOe20 Gxmum <= Br（1）xt < 100 Gxmum其中Hc（1）是沿纵向测量的磁性层的集中度; Hc（p）是在垂直方向上测量的磁性层的矫顽力; Br（1）是沿纵向测量的磁性层的剩磁; “t”为磁性层的层厚。

    Magnetic recording media and method of forming them
    64.
    发明授权
    Magnetic recording media and method of forming them 有权
    磁记录介质及其形成方法

    公开(公告)号：US07097924B2

    公开(公告)日：2006-08-29

    申请号：US10747097

    申请日：2003-12-30

    申请人： Chiseki Haginoya ,  Kaori Suzuki ,  Hisashi Kimura ,  Masaaki Futamoto ,  Hideo Matsuyama

    发明人： Chiseki Haginoya ,  Kaori Suzuki ,  Hisashi Kimura ,  Masaaki Futamoto ,  Hideo Matsuyama

    IPC分类号： G11B5/65 ,  G11B5/17 ,  G11B7/20

    CPC分类号： G11B5/82 ,  G11B5/667 ,  G11B5/8404 ,  G11B5/855

    摘要： The present invention is directed to-carrying out a high density magnetic recording to a material having a large coercive force by perpendicular magnetic recording head.By giving a patterning onto a soft magnetic under layer of a perpendicular two-layer recording media in sync with a period of a recording bit, a magnetic field from a write head can be allowed to converge to a soft magnetic column. Therefore, a magnetization reversal of the magnetic recording media material having a large anisotropic constant becomes possible, and then a high density magnetic recording can be achieved.

    摘要翻译： 本发明旨在通过垂直磁记录头对具有大矫顽力的材料进行高密度磁记录。 通过以与记录位的周期同步地将图案化到垂直的两层记录介质的软磁下层上，可以允许来自写入头的磁场会聚到软磁柱。 因此，具有大的各向异性常数的磁记录介质材料的磁化反转成为可能，然后可实现高密度磁记录。

    Magnetic recording media and method of forming them
    69.
    发明申请
    Magnetic recording media and method of forming them 失效
    磁记录介质及其形成方法

    公开(公告)号：US20060226116A1

    公开(公告)日：2006-10-12

    申请号：US11450364

    申请日：2006-06-12

    申请人： Chiseki Haginoya ,  Kaori Suzuki ,  Hisashi Kimura ,  Masaaki Futamoto ,  Hideo Matsuyama

    发明人： Chiseki Haginoya ,  Kaori Suzuki ,  Hisashi Kimura ,  Masaaki Futamoto ,  Hideo Matsuyama

    IPC分类号： G11B5/66 ,  C23F1/00 ,  G11B5/65

    CPC分类号： G11B5/82 ,  G11B5/667 ,  G11B5/8404 ,  G11B5/855

    摘要： The present invention is directed to carrying out a high density magnetic recording to a material having a large coercive force by perpendicular magnetic recording head. By giving a patterning onto a soft magnetic under layer of a perpendicular two-layer recording media in sync with a period of a recording bit, a magnetic field from a write head can be allowed to converge to a soft magnetic column. Therefore, a magnetization reversal of the magnetic recording media material having a large anisotropic constant becomes possible, and then a high density magnetic recording can be achieved.

    摘要翻译： 本发明涉及通过垂直磁记录头对矫顽磁力大的材料进行高密度磁记录。 通过以与记录位的周期同步地将图案化到垂直的两层记录介质的软磁下层上，可以允许来自写入头的磁场会聚到软磁柱。 因此，具有大的各向异性常数的磁记录介质材料的磁化反转成为可能，然后可实现高密度磁记录。

    Magnetic recording medium containing heavy rare gas atoms, and a magnetic transducing system using the medium
    70.
    发明授权
    Magnetic recording medium containing heavy rare gas atoms, and a magnetic transducing system using the medium 失效
    含有重稀土气原子的磁记录介质，以及使用介质的磁转换系统

    公开(公告)号：US5650889A

    公开(公告)日：1997-07-22

    申请号：US380792

    申请日：1995-01-30

    申请人： Tomoo Yamamoto ,  Yuzuru Hosoe ,  Emi Mangyo ,  Masaaki Futamoto ,  Nobuyuki Inaba

    发明人： Tomoo Yamamoto ,  Yuzuru Hosoe ,  Emi Mangyo ,  Masaaki Futamoto ,  Nobuyuki Inaba

    IPC分类号： G11B5/012 ,  G11B5/64 ,  G11B5/82

    CPC分类号： G11B5/656 ,  G11B5/012

    摘要： A magnetic recording medium having a high coercivity and a high S/N ratio for high-density operation can include either a conductive or a nonconductive substrate. If the substrate is nonconductive, a conducting precoat layer is formed over the substrate. Further, an underlayer may be provided, over which a magnetic layer is formed by a bias sputtering method. The bias sputtering method may use Kr, Xe or Rn as a sputter gas, and employs a negative bias voltage. The magnetic recording medium has a product of remanent magnetization and magnetic layer thickness of 10-150 G.multidot..mu.m and a coercivity of 1600-4000 Oe. In combination with this magnetic recording medium, a large-capacity magnetic recording system has a write head that uses a magnetic material having a saturation magnetic flux density of more than 1.2 T in at least a part of the magnetic core; a read head utilizing the giant magnetoresistance effect; a signal processing circuit that utilizes maximum likelihood decoding; and circuits that correct for asymmetry of the reproduced signals from the magnetoresistive head. In addition, the flying height of the magnetic head slider is set to less than 0.05 .mu.m.

    摘要翻译： 具有高矫顽力和高S / N比的用于高密度操作的磁记录介质可以包括导电或非导电衬底。 如果衬底不导电，则在衬底上形成导电预涂层。 此外，可以设置底层，通过偏置溅射法在其上形成磁性层。 偏置溅射法可以使用Kr，Xe或Rn作为溅射气体，并采用负偏置电压。 磁记录介质具有10-150Gxμm的剩余磁化和磁性层厚度的产物，矫顽力为1600-4000Oe。 与该磁记录介质相结合，大容量磁记录系统具有在至少一部分磁芯中使用饱和磁通密度大于1.2T的磁性材料的写头; 利用巨磁电阻效应的读头; 利用最大似然解码的信号处理电路; 以及校正来自磁阻头的再现信号的不对称性的电路。 此外，磁头滑块的飞行高度设定为小于0.05μm。