利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

274 条记录 (耗时 0.032 秒)

    Magnetic recording medium, method of manufacture therefor, and magnetic read/write apparatus
    3.
    发明授权
    Magnetic recording medium, method of manufacture therefor, and magnetic read/write apparatus 失效
    磁记录介质，其制造方法和磁读/写装置

    公开(公告)号：US06723458B2

    公开(公告)日：2004-04-20

    申请号：US10218570

    申请日：2002-08-15

    申请人： Kenji Shimizu ,  Akira Sakawaki ,  Hui Yang ,  Hiro Mochizuki ,  Hiroshi Sakai ,  Takashi Hikosaka ,  Futoshi Nakamura

    发明人： Kenji Shimizu ,  Akira Sakawaki ,  Hui Yang ,  Hiro Mochizuki ,  Hiroshi Sakai ,  Takashi Hikosaka ,  Futoshi Nakamura

    IPC分类号： G11B566

    CPC分类号： G11B5/667 ,  G11B5/656 ,  G11B5/7325 ,  Y10S428/90

    摘要： A magnetic recording medium that is capable of recording and reading back information at a higher density by improving the read/write characteristics and thermal stability, a method of manufacture therefor, and a magnetic read/write apparatus are provided. This magnetic recording medium, comprises an orientation control film that controls the orientation of a film provided directly thereabove, a perpendicular magnetic film, of which the axis of easy magnetization is generally oriented perpendicular to a non-magnetic substrate, and a protective film, that are provided on the non-magnetic substrate, wherein the perpendicular magnetic film is made of a material which contains Co, Cr, Pt and Cu, the Cr content being 16 at % to 24 at % and the Cu content being 0.1 at % to 4 at %, and a coercive force (Hc) of the perpendicular magnetic film being at least 3000 (Oe), negative nucleation field (−Hn) being 0 (Oe) to 2500 (Oe), and a ratio of residual magnetization (Mr) to saturation magnetization (Ms) being at least 0.85.

    摘要翻译： 提供能够通过改善读/写特性和热稳定性而以更高密度记录和读回信息的磁记录介质，其制造方法和磁读/写装置。 这种磁记录介质包括控制直接在其上设置的膜的取向的取向控制膜，容易磁化轴垂直于非磁性基板的垂直磁性膜和保护膜，其中 设置在非磁性基板上，其中垂直磁性膜由含有Co，Cr，Pt和Cu的材料制成，Cr含量为16at％至24at％，Cu含量为0.1at％至4 （Oe），负成核场（-Hn）为0（Oe）〜2500（Oe），剩余磁化强度（Mr））为0以上，垂直磁性膜的矫顽力（Hc）为3000 饱和磁化强度（Ms）至少为0.85。

    Magnetic recording medium, process and apparatus for producing the same, and magnetic recording and reproducing apparatus
    7.
    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
    8.
    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。