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    Magnetic recording medium, method of manufacture therefor, and apparatus for magnetic reproducing and reproducing recordings
    1.
    发明申请
    Magnetic recording medium, method of manufacture therefor, and apparatus for magnetic reproducing and reproducing recordings 有权
    磁记录介质及其制造方法以及用于磁再现和再现记录的设备

    公开(公告)号：US20020160232A1

    公开(公告)日：2002-10-31

    申请号：US10082201

    申请日：2002-02-26

    申请人： SHOWA DENKO K.K., KABUSHIKI KAISHA TOSHIBA

    发明人： Kenji Shimizu ,  Akira Sakawaki ,  Hiroshi Sakai ,  Takashi Hikosaka ,  Soichi Oikawa

    IPC分类号： G11B005/66

    CPC分类号： G11B5/667 ,  G11B5/656 ,  G11B5/7325 ,  G11B5/855

    摘要： A magnetic recording medium comprising: on a non-magnetic substrate, at least a soft magnetic undercoat film comprising a soft magnetic material; an orientation control film for controlling an orientation of a film directly above; a perpendicular magnetic film in which an axis of easy magnetization is oriented mainly perpendicularly with respect to the substrate; and a protection film, wherein the perpendicular magnetic film has a structure in which a large number of magnetic grains are separated by a grain boundary layer, and an average separating distance between the magnetic grains along a straight line which connects centers of gravity of mutually neighboring magnetic grains is 1 nm or greater.

    摘要翻译： 一种磁记录介质，包括：在非磁性基底上，至少包含软磁性材料的软磁性底涂层; 用于直接控制膜的取向的取向控制膜; 垂直磁性膜，其中容易磁化的轴主要相对于衬底垂直取向; 和保护膜，其中垂直磁性膜具有其中大量的磁性颗粒被晶界层分离的结构，以及沿着相互相邻的重心的直线的磁性颗粒之间的平均分离距离 磁性粒子为1nm以上。