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    Magnetic recording media and magnetic disk apparatus
    1.
    发明授权
    Magnetic recording media and magnetic disk apparatus 失效
    磁记录介质和磁盘设备

    公开(公告)号：US06509111B1

    公开(公告)日：2003-01-21

    申请号：US09609327

    申请日：2000-06-30

    申请人： Mitsuhiro Shoda ,  Naoto Endo ,  Noriyoshi Goda ,  Yuzuru Hosoe ,  Akira Kato

    发明人： Mitsuhiro Shoda ,  Naoto Endo ,  Noriyoshi Goda ,  Yuzuru Hosoe ,  Akira Kato

    IPC分类号： G11B566

    CPC分类号： G11B5/7325 ,  G11B5/82 ,  Y10S428/90

    摘要： A magnetic recording media formed of magnetic alloy layer of Co as the main component on a substrate through an under-layer, a protective layer and a lubricant layer, stacked in this order, said under-layer comprises plural under-layers including a first under layer of a substantially amorphous and a second under layer of crystalline stacked in this order; and a &Dgr;BH[0.01, 50] defined by |BH[0.01%]−BH[50%]|, as the difference between a height BH[0.01%] where a Bearing ratio is 0.01% and a height BH[50%] where a Bearing ratio is 50%, is not less than 3 nm and not more than 6 nm, where a Bearing Curve is given by a surface roughness curve of magnetic recording media.

    摘要翻译： 由Co的磁性合金层作为主要成分的磁性记录介质通过下层，保护层和润滑剂层依次堆叠在基板上，所述下层包括多个下层，其包括第一下层 基本上无定形的层和第二下层结晶层; 作为轴承比为0.01％的高度BH [0.01％]和高度BH [50％]之间的差异，由| BH [0.01％] -BH [50％] |定义的DELTABH [0.01,50] 其中轴承比为50％，不小于3nm且不大于6nm，其中轴承曲线由磁记录介质的表面粗糙度曲线给出。

    Magnetic recording media and magnetic disk apparatus
    2.
    发明授权
    Magnetic recording media and magnetic disk apparatus 失效
    磁记录介质和磁盘设备

    公开(公告)号：US06852432B2

    公开(公告)日：2005-02-08

    申请号：US10293261

    申请日：2002-11-14

    申请人： Mitsuhiro Shoda ,  Naoto Endo ,  Noriyoshi Goda ,  Yuzuru Hosoe ,  Akira Kato

    发明人： Mitsuhiro Shoda ,  Naoto Endo ,  Noriyoshi Goda ,  Yuzuru Hosoe ,  Akira Kato

    IPC分类号： G11B5/64 ,  G11B5/73 ,  G11B5/66 ,  G11B5/70

    CPC分类号： G11B5/7325 ,  G11B5/64 ,  Y10S428/90 ,  Y10T428/265

    摘要： A magnetic recording media formed of magnetic alloy layer of Co as the main component on a substrate through an under-layer, a protective layer and a lubricant layer, stacked in this order, said under-layer comprises plural under-layers including a first under layer of a substantially amorphous and a second under layer of crystalline stacked in this order; and a Δ BH[0.01, 50] defined by |BH[0.01%]−BH[50%]|, as the difference between a height BH[0.01%] where a Bearing ratio is 0.01% and a height BH[50%] where a Bearing ratio is 50%, is not less than 3 nm and not more than 6 nm, where a Bearing Curve is given by a surface roughness curve of magnetic recording media.

    摘要翻译： 由Co的磁性合金层作为主要成分的磁性记录介质通过下层，保护层和润滑剂层依次堆叠在基板上，所述下层包括多个下层，其包括第一下层 基本上无定形的层和第二下层结晶层; 和由BH [0.01％] -BH [50％] |定义的ΔBB[0.01,50]，作为轴承比为0.01％的高度BH [0.01％]和高度BH [50％ ]其中轴承比为50％，不小于3nm且不大于6nm，其中轴承曲线由磁记录介质的表面粗糙度曲线给出。

    Perpendicular magnetic recording medium with high medium S/N
    4.
    发明授权
    Perpendicular magnetic recording medium with high medium S/N 有权
    具有高介质S / N的垂直磁记录介质

    公开(公告)号：US08802247B2

    公开(公告)日：2014-08-12

    申请号：US11582878

    申请日：2006-10-17

    申请人： Hiroyuki Matsumoto ,  Mitsuhiro Shoda ,  Reiko Arai ,  Yuzuru Hosoe ,  Katsumi Mabuchi

    发明人： Hiroyuki Matsumoto ,  Mitsuhiro Shoda ,  Reiko Arai ,  Yuzuru Hosoe ,  Katsumi Mabuchi

    IPC分类号： G11B5/66 ,  G11B5/667

    CPC分类号： G11B5/667

    摘要： A medium having high medium S/N and excellent corrosion resistance is achieved. In one embodiment, an adhesion layer, a soft magnetic layer, an intermediate layer, a magnetic recording layer, and a protective layer are deposited, in order, on a substrate. The soft magnetic underlayer consists at least of two soft magnetic layers, the first soft magnetic layer formed on the recording layer side being composed of an amorphous alloy containing 85 at. % or less of Co, and the second soft magnetic layer formed on the substrate side being composed of an alloy containing more than 85 at. % of Co.

    摘要翻译： 实现了具有高介质S / N和优异耐腐蚀性的介质。 在一个实施例中，粘附层，软磁层，中间层，磁记录层和保护层依次沉积在基板上。 软磁性底层至少由两个软磁性层构成，记录层侧形成的第一软磁性层由含有85μm的非晶态合金构成。 Co以下的合金，由基板侧形成的第二软磁性层由含有85以上的合金构成。 有限公司

    Perpendicular magnetic recording medium with high medium S/N
    5.
    发明申请
    Perpendicular magnetic recording medium with high medium S/N 有权
    具有高介质S / N的垂直磁记录介质

    公开(公告)号：US20070087226A1

    公开(公告)日：2007-04-19

    申请号：US11582878

    申请日：2006-10-17

    申请人： Hiroyuki Matsumoto ,  Mitsuhiro Shoda ,  Reiko Arai ,  Yuzuru Hosoe ,  Katsumi Mabuchi

    发明人： Hiroyuki Matsumoto ,  Mitsuhiro Shoda ,  Reiko Arai ,  Yuzuru Hosoe ,  Katsumi Mabuchi

    IPC分类号： G11B5/66

    CPC分类号： G11B5/667

    摘要： A medium having high medium S/N and excellent corrosion resistance is achieved. In one embodiment, an adhesion layer, a soft magnetic layer, an intermediate layer, a magnetic recording layer, and a protective layer are deposited, in order, on a substrate. The soft magnetic underlayer consists at least of two soft magnetic layers, the first soft magnetic layer formed on the recording layer side being composed of an amorphous alloy containing 85 at. % or less of Co, and the second soft magnetic layer formed on the substrate side being composed of an alloy containing more than 85 at. % of Co.

    摘要翻译： 实现了具有高介质S / N和优异耐腐蚀性的介质。 在一个实施例中，依次将粘合层，软磁层，中间层，磁记录层和保护层沉积在基板上。 软磁性底层至少由两个软磁性层构成，记录层侧形成的第一软磁性层由含有85μm的非晶态合金构成。 Co以下的合金，由基板侧形成的第二软磁性层由含有85个以上的合金构成。 有限公司

    Magnetic recording medium, method of manufacturing the magnetic recording medium and a magnetic disk drive using the magnetic recording medium
    6.
    发明申请
    Magnetic recording medium, method of manufacturing the magnetic recording medium and a magnetic disk drive using the magnetic recording medium 审中-公开
    磁记录介质，磁记录介质的制造方法和使用该磁记录介质的磁盘驱动器

    公开(公告)号：US20060121317A1

    公开(公告)日：2006-06-08

    申请号：US11288546

    申请日：2005-11-28

    申请人： Yuichi Kokaku ,  Mitsuhiro Shoda ,  Hiroyuki Matsumoto ,  Mikio Suzuki ,  Takehiko Hamaguchi ,  Yuzuru Hosoe

    发明人： Yuichi Kokaku ,  Mitsuhiro Shoda ,  Hiroyuki Matsumoto ,  Mikio Suzuki ,  Takehiko Hamaguchi ,  Yuzuru Hosoe

    IPC分类号： B05D5/12

    CPC分类号： G11B20/10009 ,  G11B5/4555 ,  G11B5/65 ,  G11B5/667 ,  G11B5/8404 ,  G11B20/1816

    摘要： The present invention restricts defect density on the magnetic disk based on predetermined polishing conditions by applying a magnetic field to the entire surface of a magnetic disk in a direction vertical thereto, rotating the magnetic disk, loading a magnetic head to the magnetic disk, reproducing signals from the magnetic disk, processing the reproduced signals by a waveform analyzer, counting pulse waveforms of 0.9 times or more a servo-bit length at ½ threshold value of an average output, and measuring the defect density on the magnetic disk giving an undesired effect on the I/O performance of the magnetic disk drive. In a case of a magnetic recording medium using a vertical magnetic recording system, even with fine defect of magnetic layer, a servo pattern cannot be judged correctly. This provides degradation of the I/O performance of increasing the time necessary for reading out large capacity data, lowering the performance of the entire magnetic disk drive.

    摘要翻译： 本发明基于预定的抛光条件来限制磁盘上的缺陷密度，通过向垂直于其的方向的磁盘的整个表面施加磁场，旋转磁盘，将磁头加载到磁盘，再现信号 通过波形分析器对再生信号进行处理，对平均输出的1/2阈值的伺服位长度的0.9倍以上的脉冲波形进行计数，并测量磁盘上的缺陷密度，给出不期望的影响 磁盘驱动器的I / O性能。 在使用垂直磁记录系统的磁记录介质的情况下，即使磁性层的细小缺陷，也不能正确判断伺服图案。 这提供了I / O性能的劣化，从而增加了读取大容量数据所需的时间，降低了整个磁盘驱动器的性能。