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    Magnetic recording medium having a cobalt-based alloy film for high density recording and magnetic storage device using same
    1.
    发明授权
    Magnetic recording medium having a cobalt-based alloy film for high density recording and magnetic storage device using same 有权
    具有用于高密度记录的钴基合金膜和使用它的磁存储装置的磁记录介质

    公开(公告)号：US07545604B2

    公开(公告)日：2009-06-09

    申请号：US11317344

    申请日：2005-12-22

    申请人： Tatsuya Hinoue ,  Yotsuo Yahisa ,  Tomoo Yamamoto ,  Joe Inagaki ,  Hiroyuko Suzuki ,  Hidekazu Kashiwase

    发明人： Tatsuya Hinoue ,  Yotsuo Yahisa ,  Tomoo Yamamoto ,  Joe Inagaki ,  Hiroyuko Suzuki ,  Hidekazu Kashiwase

    IPC分类号： G11B5/66 ,  B32B3/02

    CPC分类号： G11B5/65 ,  G11B5/656 ,  G11B5/66 ,  H01F10/16 ,  H01F10/265

    摘要： In one embodiment, a magnetic recording medium comprises an underlying film, a magnetic film and a protective film formed in this order on a substrate. The magnetic film is a cobalt-base alloy film containing chromium and has a plurality of magnetic layers stacked without interposition of any non-magnetic layer. The plural magnetic layers comprise first, second and third magnetic layers. The first magnetic layer is disposed between the underlying film and the second magnetic layer. The second magnetic layer is disposed between the first magnetic layer and the third magnetic layer. The third magnetic layer is disposed between the second magnetic layer and the protective film. The concentration of chromium contained in the first magnetic layer is lower than that of chromium contained in the second magnetic layer. The thickness of the first magnetic layer is smaller than that of the second magnetic layer. The magnetic layers which overlie the first magnetic layer further contain platinum and boron. The concentration of chromium contained in the third magnetic layer is lower than that of chromium contained in the second magnetic layer.

    摘要翻译： 在一个实施例中，磁记录介质包括在衬底上依次形成的下面的膜，磁性膜和保护膜。 磁性膜是含有铬的钴基合金膜，并且具有堆叠而不插入任何非磁性层的多个磁性层。 多个磁性层包括第一，第二和第三磁性层。 第一磁性层设置在下面的膜和第二磁性层之间。 第二磁性层设置在第一磁性层和第三磁性层之间。 第三磁性层设置在第二磁性层和保护膜之间。 第一磁性层中含有的铬的浓度低于第二磁性层中含有的铬的浓度。 第一磁性层的厚度小于第二磁性层的厚度。 覆盖在第一磁性层上的磁性层还含有铂和硼。 第三磁性层中含有的铬的浓度低于第二磁性层中含有的铬的浓度。

    Magnetic recording medium for high density recording and magnetic storage device using same
    2.
    发明申请
    Magnetic recording medium for high density recording and magnetic storage device using same 有权
    用于高密度记录和磁存储装置的磁记录介质

    公开(公告)号：US20090258253A1

    公开(公告)日：2009-10-15

    申请号：US12387164

    申请日：2009-04-28

    申请人： Tatsuya Hinoue ,  Yotsuo Yahisa ,  Tomoo Yamamoto ,  Joe Inagaki ,  Hiroyuko Suzuki ,  Hidekazu Kashiwase

    发明人： Tatsuya Hinoue ,  Yotsuo Yahisa ,  Tomoo Yamamoto ,  Joe Inagaki ,  Hiroyuko Suzuki ,  Hidekazu Kashiwase

    IPC分类号： G11B5/66

    CPC分类号： G11B5/65 ,  G11B5/656 ,  G11B5/66 ,  H01F10/16 ,  H01F10/265

    摘要： In one embodiment, a magnetic recording medium comprises an underlying film, a magnetic film and a protective film formed in this order on a substrate. The magnetic film is a cobalt-base alloy film containing chromium and has a plurality of magnetic layers stacked without interposition of any non-magnetic layer. The plural magnetic layers comprise first, second and third magnetic layers. The first magnetic layer is disposed between the underlying film and the second magnetic layer. The second magnetic layer is disposed between the first magnetic layer and the third magnetic layer. The third magnetic layer is disposed between the second magnetic layer and the protective film. The concentration of chromium contained in the first magnetic layer is lower than that of chromium contained in the second magnetic layer. The thickness of the first magnetic layer is smaller than that of the second magnetic layer. The magnetic layers which overlie the first magnetic layer further contain platinum and boron. The concentration of chromium contained in the third magnetic layer is lower than that of chromium contained in the second magnetic layer.

    摘要翻译： 在一个实施例中，磁记录介质包括在衬底上依次形成的下面的膜，磁性膜和保护膜。 磁性膜是含有铬的钴基合金膜，并且具有堆叠而不插入任何非磁性层的多个磁性层。 多个磁性层包括第一，第二和第三磁性层。 第一磁性层设置在下面的膜和第二磁性层之间。 第二磁性层设置在第一磁性层和第三磁性层之间。 第三磁性层设置在第二磁性层和保护膜之间。 第一磁性层中含有的铬的浓度低于第二磁性层中含有的铬的浓度。 第一磁性层的厚度小于第二磁性层的厚度。 覆盖在第一磁性层上的磁性层还含有铂和硼。 第三磁性层中含有的铬的浓度低于第二磁性层中含有的铬的浓度。