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    Method of manufacturing a magnetic recording medium
    1.
    发明授权
    Method of manufacturing a magnetic recording medium 有权
    制造磁记录介质的方法

    公开(公告)号：US06468602B2

    公开(公告)日：2002-10-22

    申请号：US09944178

    申请日：2001-09-04

    申请人： Ryuji Sakaguchi ,  Hiroshi Sakai ,  Mikio Suzuki ,  Kazunori Ohnami

    发明人： Ryuji Sakaguchi ,  Hiroshi Sakai ,  Mikio Suzuki ,  Kazunori Ohnami

    IPC分类号： H05H102

    CPC分类号： G11B5/85 ,  C23C16/26 ,  G11B5/72 ,  G11B5/725 ,  G11B5/8408

    摘要： The present invention provides a method for manufacturing a magnetic recording medium comprising the steps of forming a carbon protective film onto a disc, the non-magnetic substrate of which is layered with a non-magnetic base film and magnetic film, using a reactant gas containing carbon atoms as a starting material, according to a plasma CVD method, wherein a mixed gas of hydrocarbon and hydrogen, in which the mixing ratio of hydrocarbon to hydrogen is in the range of 2 to 1˜1 to 100 by volume, is used as a reactant gas, during bias applying to said disc. In addition, the present invention provides a magnetic recording medium comprising a carbon protective film formed onto a disc, the non-magnetic substrate of which is layered with a non-magnetic base film and magnetic film, wherein said carbon protective film is formed according to a plasma CVD method, while applying bias.

    摘要翻译： 本发明提供一种制造磁记录介质的方法，包括以下步骤：在非磁性基板上用非磁性基膜和磁性薄膜层叠形成碳保护膜，使用含有 碳原子作为起始原料，根据等离子体CVD法，其中烃与氢的混合比在烃与氢的混合比在2至1至1至100的范围内的混合气体用作 在施加到所述盘的偏压期间反应气体。 此外，本发明提供一种磁记录介质，其包含形成在盘上的碳保护膜，其非磁性基板与非磁性基膜和磁性膜层叠，其中所述碳保护膜根据 等离子体CVD法，同时施加偏压。

    Magnetic recording medium
    2.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US06255006B1

    公开(公告)日：2001-07-03

    申请号：US09227916

    申请日：1999-01-08

    申请人： Kazunori Ohnami ,  Hiroshi Kanazawa ,  Hiroshi Sakai

    发明人： Kazunori Ohnami ,  Hiroshi Kanazawa ,  Hiroshi Sakai

    IPC分类号： G11B566

    CPC分类号： G11B5/66 ,  Y10S428/90 ,  Y10S428/928 ,  Y10T428/12507 ,  Y10T428/12535 ,  Y10T428/12812 ,  Y10T428/12819 ,  Y10T428/12826 ,  Y10T428/12833 ,  Y10T428/1284 ,  Y10T428/12847 ,  Y10T428/12854 ,  Y10T428/12931

    摘要： A magnetic recording medium comprising a non-magnetic substrate having thereon a non-magnetic undercoat, a magnetic film and optionally a protective film. The magnetic film comprises a material containing Co as a main component. The non-magnetic undercoat comprises at least two layers including a first undercoat film and a second undercoat film provided on the first undercoat film. The first undercoat film comprises a material containing Cr as a main component, and the second undercoat film comprises a material selected from the group consisting of a Cr/Nb-base alloy, a Cr/W-base alloy, a Cr/V-base alloy and a Cr/Mo-base alloy as a main component.

    摘要翻译： 一种磁记录介质，包括其上具有非磁性底涂层的非磁性基底，磁性膜和任选的保护膜。 磁性膜包含含有Co作为主要成分的材料。 非磁性底涂层包括至少两层，包括设置在第一底涂膜上的第一底涂膜和第二底涂膜。 第一底涂膜包含以Cr为主要成分的材料，第二底涂层包含选自Cr / Nb基合金，Cr / W基合金，Cr / V碱 合金和Cr / Mo基合金为主要成分。

    Magnetic recording medium and method of producing the same
    5.
    发明授权
    Magnetic recording medium and method of producing the same 有权
    磁记录介质及其制造方法

    公开(公告)号：US06316062B1

    公开(公告)日：2001-11-13

    申请号：US09508836

    申请日：2000-03-17

    申请人： Ryuji Sakaguchi ,  Kazuo Kobayashi ,  Hiroshi Sakai ,  Mikio Suzuki ,  Kenichi Yoneyama ,  Kazunori Ohnami

    发明人： Ryuji Sakaguchi ,  Kazuo Kobayashi ,  Hiroshi Sakai ,  Mikio Suzuki ,  Kenichi Yoneyama ,  Kazunori Ohnami

    IPC分类号： H05H102

    CPC分类号： G11B5/85 ,  C23C16/26 ,  G11B5/72 ,  G11B5/725 ,  G11B5/8408

    摘要： The present invention provides a method for manufacturing a magnetic recording medium comprising the steps of forming a carbon protective film onto a disc, the non-magnetic substrate of which is layered with a non-magnetic base film and magnetic film, using a reactant gas containing carbon atoms as a starting material, according to a plasma CVD method, wherein a mixed gas of hydrocarbon and hydrogen, in which the mixing ratio of hydrocarbon to hydrogen is in the range of 2 to 1˜1 to 100 by volume, is used as a reactant gas, during bias applying to said disc. In addition, the present invention provides a magnetic recording medium comprising a carbon protective film formed onto a disc, the non-magnetic substrate of which is layered with a non-magnetic base film and magnetic film, wherein said carbon protective film is formed according to a plasma CVD method, while applying bias.

    摘要翻译： 本发明提供一种制造磁记录介质的方法，包括以下步骤：在非磁性基板上用非磁性基膜和磁性薄膜层叠形成碳保护膜，使用含有 碳原子作为起始原料，根据等离子体CVD法，其中烃与氢的混合比在烃与氢的混合比在2至1至1至100的范围内的混合气体用作 在施加到所述盘的偏压期间反应气体。 此外，本发明提供一种磁记录介质，其包含形成在盘上的碳保护膜，其非磁性基板与非磁性基膜和磁性膜层叠，其中所述碳保护膜根据 等离子体CVD法，同时施加偏压。