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    Magnetic recording medium, process and apparatus for producing the same, and magnetic recording and reproducing apparatus
    4.
    发明授权
    Magnetic recording medium, process and apparatus for producing the same, and magnetic recording and reproducing apparatus 失效
    磁记录介质，其制造方法和装置以及磁记录和再现装置

    公开(公告)号：US06686072B2

    公开(公告)日：2004-02-03

    申请号：US09940853

    申请日：2001-08-29

    申请人： Akira Sakawaki ,  Masato Kokubu ,  Hiroshi Sakai

    发明人： Akira Sakawaki ,  Masato Kokubu ,  Hiroshi Sakai

    IPC分类号： G11B566

    CPC分类号： G11B5/7325 ,  G11B5/8404 ,  Y10S428/90 ,  Y10T428/12465

    摘要： A magnetic recording medium which exhibits excellent magnetic characteristics and which can be easily produced is disclosed. A magnetic recording medium containing a non-metallic substrate 1, a non-magnetic undercoat film 3, a cobalt alloy hexagonal closed packed (hcp) (110) textured magnetic film 4, and a protective film 5 formed on the substrate. An orientation-determining film 2, which determines the crystal orientation of an undercoat film provided directly thereon to cause the texture of the undercoat film to be (200), is formed between the substrate 1 and the undercoat film 3. The orientation-determining film 2 has a crystal structure such that columnar fine crystal grains 2a are inclined in a radial direction of the substrate 1, and the ratio of a coercive force in a circumferential direction of the medium (Hcc) to a coercive force in a radial direction of the medium (Hcr); i.e., Hcc/Hcr, is more than 1.

    摘要翻译： 公开了一种表现出优异的磁特性并且易于生产的磁记录介质。 包含非金属基底1，非磁性底涂层3，钴合金六方密封（hcp）（110）纹理磁性膜4和形成在基底上的保护膜5的磁记录介质。 在基板1和底涂膜3之间形成取向决定膜2，该取向决定膜2确定直接设置在其上以使底涂层的织构成为（200）的底涂膜的晶体取向。取向决定膜 2具有晶体结构，使得柱状细晶粒2a沿着基板1的径向倾斜，并且介质（Hcc）的圆周方向上的矫顽力与径向方向上的矫顽力的比率 中等（Hcr）; 即Hcc / Hcr大于1。

    Process of producing a magnetic recording medium
    5.
    发明授权
    Process of producing a magnetic recording medium 失效
    制造磁记录介质的方法

    公开(公告)号：US06582758B2

    公开(公告)日：2003-06-24

    申请号：US09810193

    申请日：2001-03-19

    申请人： Akira Sakawaki ,  Masato Kokubu ,  Ryuji Sakaguchi ,  Hiroshi Sakai

    发明人： Akira Sakawaki ,  Masato Kokubu ,  Ryuji Sakaguchi ,  Hiroshi Sakai

    IPC分类号： B05D512

    CPC分类号： G11B5/8404 ,  G11B5/851 ,  Y10T428/12944 ,  Y10T428/24355 ,  Y10T428/265

    摘要： An object of the present invention is to provide a process for easily producing a magnetic recording medium exhibiting excellent magnetic characteristics. In the present invention, an orientation-determining film is formed on a non-metallic substrate which has undergone texturing, the orientation-determining film is subjected to oxidation or nitridation, and a non-magnetic undercoat film and a magnetic film are formed on the film.

    摘要翻译： 本发明的目的是提供一种易于制造表现出优异的磁特性的磁记录介质的方法。 在本发明中，在经过纹理化的非金属基材上形成取向决定膜，取向决定膜进行氧化或氮化，在该金属基材上形成非磁性底涂膜和磁性膜 电影。