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    Magnetic recording medium and magnetic recording system using the same
    1.
    发明授权
    Magnetic recording medium and magnetic recording system using the same 失效
    磁记录介质和使用磁记录系统的磁记录系统

    公开(公告)号：US5759681A

    公开(公告)日：1998-06-02

    申请号：US595303

    申请日：1996-02-01

    申请人： Yuzuru Hosoe ,  Kazuetsu Yoshida ,  Nobuyuki Inaba ,  Tomoo Yamamoto ,  Akira Ishikawa ,  Masaaki Futamoto ,  Hiroyuki Kataoka ,  Yoshihiro Shiroishi

    发明人： Yuzuru Hosoe ,  Kazuetsu Yoshida ,  Nobuyuki Inaba ,  Tomoo Yamamoto ,  Akira Ishikawa ,  Masaaki Futamoto ,  Hiroyuki Kataoka ,  Yoshihiro Shiroishi

    IPC分类号： G11B5/127 ,  G11B5/39 ,  G11B5/66

    CPC分类号： G11B5/1278 ,  G11B5/3967 ,  G11B5/66 ,  Y10S428/90 ,  Y10T428/26 ,  Y10T428/265

    摘要： A magnetic recording system includes an intermediate layer arranged between adjacent ones of a plurality of magnetic layers constituting a magnetic recording medium, the magnetic recording medium driven by a drive section in the recording direction, and a magnetic head including a write section and a read-back section set in relative motion with respect to the magnetic recording medium. Signals are applied to the magnetic head and the output signals from the magnetic head are read back by a read/write signal processing device. The read-back section of the magnetic head includes a magnetoresistive magnetic head. The magnetic layers of the magnetic recording medium include crystal grains having different crystal orientations and existing in overlapped positions in the direction perpendicular to the medium surface. High-density information read/write operation thus is made possible with an improved reliability.

    摘要翻译： 磁记录系统包括布置在构成磁记录介质的多个磁性层的相邻磁记录层之间的中间层，由记录方向上的驱动部分驱动的磁记录介质，以及包括写入区和读出区的磁头， 相对于磁记录介质相对运动地设置。 信号被施加到磁头，并且来自磁头的输出信号由读/写信号处理装置读回。 磁头的回读部分包括磁阻磁头。 磁记录介质的磁性层包括具有不同晶体取向并且在与介质表面垂直的方向上重叠位置的晶粒。 因此，高密度信息读/写操作可以提高可靠性。

    Multi-layered magnetic recording medium and magnetic recording system employing the same
    2.
    发明授权
    Multi-layered magnetic recording medium and magnetic recording system employing the same 失效
    多层磁记录介质和采用该磁记录介质的磁记录系统

    公开(公告)号：US5723198A

    公开(公告)日：1998-03-03

    申请号：US258923

    申请日：1994-06-13

    申请人： Yuzuru Hosoe ,  Yoshihiro Shiroishi ,  Akira Ishikawa ,  Futoshi Tomiyama ,  Kazuetsu Yoshida ,  Tomoo Yamamoto ,  Yotsuo Yahisa ,  Akira Osaki ,  Katsuo Abe ,  Shinji Narishige ,  Naoki Kodama ,  Kiwamu Tanahashi ,  Emi Mangyo

    发明人： Yuzuru Hosoe ,  Yoshihiro Shiroishi ,  Akira Ishikawa ,  Futoshi Tomiyama ,  Kazuetsu Yoshida ,  Tomoo Yamamoto ,  Yotsuo Yahisa ,  Akira Osaki ,  Katsuo Abe ,  Shinji Narishige ,  Naoki Kodama ,  Kiwamu Tanahashi ,  Emi Mangyo

    IPC分类号： G11B5/66

    CPC分类号： G11B5/66 ,  Y10S428/90 ,  Y10T428/24355 ,  Y10T428/24942 ,  Y10T428/265

    摘要： In a magnetic recording system including magnetic recording media, a rotation driving unit for driving these magnetic recording media, read/write magnetic heads, driving apparatus for driving these read/write magnetic heads, and a read/write signal processing apparatus, a reading portion of the respective magnetic heads is arranged by a magnetoresistive head. The magnetic recording media are constructed of multi-layered magnetic media having a plurality of magnetic layers fabricated directly, or via underlayers on a non-magnetic disk substrate, and of non-magnetic intermediate layers arranged among these non-magnetic layers. Furthermore, one coercivity which is measured by applying a magnetic field along a circumferential direction of the magnetic recording media, is selected to be larger than the other coercivity which is measured by applying a magnetic field along a radial direction of the magnetic recording media, so that a higher signal-to-noise ratio is achieved, as compared with that of the conventional magnetic recording system. Since the thickness of the non-magnetic intermediate layers is smaller than or equal to 5 nm, and also the total layer is smaller than or equal to 5 nm, and also the total layer number of the plural magnetic layers is selected to be odd, better characteristics can be achieved. Accordingly, since the MTBF (Mean Time Before Failure) is longer than or equal to 0.15 million hours with high recording density, and the disk substrate and the magnetic head sliders can be mounted at high packaging density, a compact and high-capacity magnetic recording system can be obtained.

    摘要翻译： 在包括磁记录介质的磁记录系统中，用于驱动这些磁记录介质的旋转驱动单元，读/写磁头，用于驱动这些读/写磁头的驱动装置以及读/写信号处理装置，读/ 相应的磁头由磁阻头安排。 磁记录介质由具有直接制造的多个磁性层或通过非磁盘基板上的底层以及布置在这些非磁性层之间的非磁性中间层的多层磁性介质构成。 此外，通过沿着磁记录介质的圆周方向施加磁场来测量的一个矫顽力被选择为大于通过沿着磁记录介质的径向方向施加磁场而测量的其他矫顽力，因此， 与常规磁记录系统相比，实现了更高的信噪比。 由于非磁性中间层的厚度小于或等于5nm，并且总层小于或等于5nm，并且多个磁性层的总层数也被选择为奇数， 可以实现更好的特性。 因此，由于MTBF（平均故障间隔时间）长于或等于0.15万小时，具有高记录密度，并且盘基板和磁头滑块可以以高封装密度安装，紧凑且高容量的磁记录 系统可以得到。

    Perpendicular magnetic recording medium and magnetic storage apparatus using the same
    4.
    发明授权
    Perpendicular magnetic recording medium and magnetic storage apparatus using the same 失效
    垂直磁记录介质及使用其的磁存储装置

    公开(公告)号：US06183893B2

    公开(公告)日：2001-02-06

    申请号：US09285751

    申请日：1999-04-05

    申请人： Masaaki Futamoto ,  Yoshiyuki Hirayama ,  Kenya Ito ,  Kazuetsu Yoshida ,  Yukio Honda ,  Nobuyuki Inaba

    发明人： Masaaki Futamoto ,  Yoshiyuki Hirayama ,  Kenya Ito ,  Kazuetsu Yoshida ,  Yukio Honda ,  Nobuyuki Inaba

    IPC分类号： B32B1500

    CPC分类号： G11B5/7325 ,  G11B5/00 ,  G11B5/012 ,  G11B5/66 ,  G11B2005/0029 ,  Y10S428/90 ,  Y10S428/928 ,  Y10T428/12861 ,  Y10T428/12875 ,  Y10T428/265

    摘要： The present invention relates to a perpendicular magnetic recording medium and a magnetic storage apparatus which are improved to be suitable for high-density magnetic recording. An object thereof is to provide the perpendicular magnetic recording medium and the magnetic storage apparatus which have a low noise property for realizing a recording density of 10 Gb/in.2 or more and a high stability against thermal fluctuation. The perpendicular magnetic recording medium comprising a perpendicular magnetic film formed through an underlayer on a nonmagnetic substrate, wherein the underlayer comprises a material having a hexagonal close packed structure or an amorphous structure, and has a first underlayer nearer to the substrate, and a second underlayer having a hexagonal close packed structure formed on the first underlayer and a preferred growth orientation of [0001] and comprising a material capable of hetero-epitaxy growth onto the perpendicular magnetic film.

    摘要翻译： 本发明涉及一种改进为适合于高密度磁记录的垂直磁记录介质和磁存储装置。 其目的是提供具有低噪声特性的垂直磁记录介质和磁存储装置，以实现10Gb / in.2以上的记录密度和对热波动的高稳定性。垂直磁记录介质包括 在非磁性基板上通过下层形成的垂直磁性膜，其中，所述下层包括具有六方密堆积结构或非晶结构的材料，并且具有更靠近所述基板的第一底层和具有六方密堆积结构的第二底层 形成在第一底层上，并且具有优选的生长方向，并且包括能够在垂直磁性膜上进行异质外延生长的材料。