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    Perpendicular magnetic recording medium for high density magnetic recording and manufacturing of the same
    1.
    发明授权
    Perpendicular magnetic recording medium for high density magnetic recording and manufacturing of the same 有权
    垂直磁记录介质用于高密度磁记录和制造

    公开(公告)号：US07534507B2

    公开(公告)日：2009-05-19

    申请号：US11243012

    申请日：2005-10-03

    申请人： Reiko Arai ,  Yoshiyuki Hirayama ,  Yuzuru Hosoe ,  Tomio Iwasaki ,  Yoko Ogawa ,  Ikuko Takekuma

    发明人： Reiko Arai ,  Yoshiyuki Hirayama ,  Yuzuru Hosoe ,  Tomio Iwasaki ,  Yoko Ogawa ,  Ikuko Takekuma

    IPC分类号： G11B5/66

    CPC分类号： G11B5/732 ,  G11B5/656 ,  G11B5/851

    摘要： Embodiments of the invention are directed to a medium which provides high media S/N and good corrosion resistance. According to one embodiment, in a perpendicular magnetic recording medium at least comprising a soft-magnetic underlayer, a seed layer, an intermediate layer, a magnetic recording layer and an overcoat layer which are stacked over a substrate in order, the magnetic recording layer has a granular structure which includes many columnar grains of CoCrPt alloy and a grain boundary layer containing an oxide, the seed layer is made of TaNi alloy or TaTi alloy and the intermediate layer is made of Ru or Ru alloy which contains 80 at. % Ru or more.

    摘要翻译： 本发明的实施方案涉及提供高介质S / N和良好耐腐蚀性的介质。 根据一个实施例，在依次层叠在基板上的至少包括软磁性底层，种子层，中间层，磁记录层和覆盖层的垂直磁记录介质中，磁记录层具有 包括许多CoCrPt合金的柱状晶粒和含有氧化物的晶界层的粒状结构，种子层由TaNi合金或TaTi合金制成，中间层由含有80at的Ru或Ru合金制成。 ％Ru或更多。

    Magnetic recording medium, method for producing the same and magnetic recording apparatus using the same
    5.
    发明授权
    Magnetic recording medium, method for producing the same and magnetic recording apparatus using the same 失效
    磁记录介质及其制造方法及使用其的磁记录装置

    公开(公告)号：US06372367B1

    公开(公告)日：2002-04-16

    申请号：US09309580

    申请日：1999-05-11

    申请人： Yoshibumi Matsuda ,  Yotsuo Yahisa ,  Hiroyuki Suzuki ,  Koji Sakamoto ,  Yoko Ogawa ,  Hiroshi Tani ,  Susumu Funamoto ,  Akira Kato ,  Yuzuru Hosoe

    发明人： Yoshibumi Matsuda ,  Yotsuo Yahisa ,  Hiroyuki Suzuki ,  Koji Sakamoto ,  Yoko Ogawa ,  Hiroshi Tani ,  Susumu Funamoto ,  Akira Kato ,  Yuzuru Hosoe

    IPC分类号： B32B302

    CPC分类号： G11B5/7325 ,  B32B3/02 ,  B32B15/04 ,  G11B5/656

    摘要： A magnetic recording medium having a high reliability of durability against frictional motion can be ensured even in a severe rubbing test, while a low noise characteristic important for achievement of high-density recording is kept. A first underlayer made of an alloy containing Co or Ni as a main component and containing Cr and Zr simultaneously is formed over a base, a second underlayer having a rough surface is formed on the first underlayer, a third underlayer made of an alloy containing Ni as a main component and containing Cr and Zr simultaneously is formed over the second underlayer, a fourth underlayer as a film for controlling crystalline orientation is formed on the third underlayer, a magnetic layer made of an alloy containing cobalt a main component is formed over the fourth underlayer, and a protective film containing carbon as a main component is formed on the magnetic layer.

    摘要翻译： 即使在严重的摩擦试验中也能够确保具有高摩擦运动耐久性的可靠性的磁记录介质，同时保持对于实现高密度记录重要的低噪声特性。 在基体上形成由含有Co或Ni作为主要成分并含有Cr和Zr的合金制成的第一底层，在第一底层上形成具有粗糙表面的第二底层，由含Ni的合金制成的第三底层 作为主要成分并且在第二底层上同时形成含有Cr和Zr的第三底层，在第三底层上形成作为用于控制结晶取向的膜的第四底层，在包含主要成分的钴的合金制成的磁性层上形成 第四底层，在该磁性层上形成含有碳的保护膜作为主要成分。

    Magnetic recording medium
    7.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US06605335B2

    公开(公告)日：2003-08-12

    申请号：US09861642

    申请日：2001-05-22

    申请人： Hiroshi Tani ,  Hiroyuki Matsumoto ,  Mitsuhiro Shyoda ,  Tomonori Kozaki ,  Takayuki Nakakawaji ,  Yoko Ogawa

    发明人： Hiroshi Tani ,  Hiroyuki Matsumoto ,  Mitsuhiro Shyoda ,  Tomonori Kozaki ,  Takayuki Nakakawaji ,  Yoko Ogawa

    IPC分类号： G11B572

    CPC分类号： G11B5/725 ,  Y10T428/24355 ,  Y10T428/265 ,  Y10T428/30 ,  Y10T428/3154 ,  Y10T428/31678

    摘要： The present invention provides a magnetic recording media made possible to improve reliability and durability of the magnetic recording media with an extremely thin overcoat. A magnetic recording media made by forming at least a magnetic coat and an overcoat on a substrate of non-magnetic magnetic disk on which surface a liquid lubricant having a structure of perfluoropolyether is coated, wherein average roughness of overcoat surface Ra is less than 0.8 nm, said overcoat being a diamond-like-carbon with a thickness in a range of 1.5-4.5 nm, and said lubricant on said carbon overcoat containing a lubricant component having a structure represented by chemical formula (1): (where, p=5-36, q=4-30, x=1-5).

    摘要翻译： 本发明提供一种磁记录介质，其可以改善具有极薄外涂层的磁记录介质的可靠性和耐久性。 一种磁性记录介质，其通过在非磁性磁盘的基板上形成至少一层磁性涂层和外涂层而形成，其中涂覆有具有全氟聚醚结构的液体润滑剂的表面，其中外涂层表面Ra的平均粗糙度小于0.8nm 所述外涂层是厚度为1.5-4.5nm的类金刚石，所述碳外涂层上的所述润滑剂含有具有由化学式（1）表示的结构的润滑剂组分:(其中p = 5 -36，q = 4-30，x = 1-5）。