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    Perpendicular magnetic recording medium and magnetic storage apparatus using the same
    1.
    发明授权
    Perpendicular magnetic recording medium and magnetic storage apparatus using the same 有权
    垂直磁记录介质及使用其的磁存储装置

    公开(公告)号：US07875373B2

    公开(公告)日：2011-01-25

    申请号：US11985310

    申请日：2007-11-13

    申请人： Yoshiyuki Hirayama ,  Ichiro Tamai ,  Reiko Arai

    发明人： Yoshiyuki Hirayama ,  Ichiro Tamai ,  Reiko Arai

    IPC分类号： G11B5/65

    CPC分类号： G11B5/65 ,  G11B5/7325 ,  G11B5/851 ,  Y10T428/11

    摘要： Embodiments in accordance with the present invention help to obtain a perpendicular magnetic recording medium having a granular structure, excellent recording/reproducing properties, and excellent durability. According to one embodiment, a recording layer includes a layer which has crystal grains mainly composed of cobalt and crystal grain boundaries mainly composed of the oxide; the oxygen content of the recoding layer is changed in the film thickness direction; the oxygen content in the area in the vicinity of the interface between the recording layer and the intermediate layer is made lower than the oxygen content in the area in the vicinity of the center of the recording layer; and the oxygen content in the area in the vicinity of the interface between the recording layer and the protective layer is made lower than the oxygen content in the area in the vicinity of the center of the recording layer.

    摘要翻译： 根据本发明的实施例有助于获得具有颗粒结构的良好的记录/再现性能和优异的耐久性的垂直磁记录介质。 根据一个实施例，记录层包括主要由钴构成的晶粒和主要由氧化物构成的晶界的层; 记录层的氧含量在膜厚方向上变化; 记录层和中间层之间的界面附近的区域中的氧含量低于记录层中心附近的区域中的氧含量; 并且将记录层和保护层之间的界面附近的区域中的氧含量设定得低于记录层中心附近的区域中的氧含量。

    Perpendicular magnetic recording medium and magnetic storage apparatus using the same
    2.
    发明申请
    Perpendicular magnetic recording medium and magnetic storage apparatus using the same 有权
    垂直磁记录介质及使用其的磁存储装置

    公开(公告)号：US20080113221A1

    公开(公告)日：2008-05-15

    申请号：US11985310

    申请日：2007-11-13

    申请人： Yoshiyuki Hirayama ,  Ichiro Tamai ,  Reiko Arai

    发明人： Yoshiyuki Hirayama ,  Ichiro Tamai ,  Reiko Arai

    IPC分类号： G11B5/33

    CPC分类号： G11B5/65 ,  G11B5/7325 ,  G11B5/851 ,  Y10T428/11

    摘要： Embodiments in accordance with the present invention help to obtain a perpendicular magnetic recording medium having a granular structure, excellent recording/reproducing properties, and excellent durability. According to one embodiment, a recording layer includes a layer which has crystal grains mainly composed of cobalt and crystal grain boundaries mainly composed of the oxide; the oxygen content of the recoding layer is changed in the film thickness direction; the oxygen content in the area in the vicinity of the interface between the recording layer and the intermediate layer is made lower than the oxygen content in the area in the vicinity of the center of the recording layer; and the oxygen content in the area in the vicinity of the interface between the recording layer and the protective layer is made lower than the oxygen content in the area in the vicinity of the center of the recording layer.

    摘要翻译： 根据本发明的实施例有助于获得具有颗粒结构的良好的记录/再现性能和优异的耐久性的垂直磁记录介质。 根据一个实施例，记录层包括主要由钴构成的晶粒和主要由氧化物构成的晶界的层; 记录层的氧含量在膜厚方向上变化; 记录层和中间层之间的界面附近的区域中的氧含量低于记录层中心附近的区域中的氧含量; 并且将记录层和保护层之间的界面附近的区域中的氧含量设定得低于记录层中心附近的区域中的氧含量。

    Perpendicular magnetic recording media
    6.
    发明授权
    Perpendicular magnetic recording media 失效
    垂直磁记录介质

    公开(公告)号：US07510789B2

    公开(公告)日：2009-03-31

    申请号：US11148164

    申请日：2005-06-09

    申请人： Yoshiyuki Hirayama ,  Hiroyuki Nakagawa ,  Hiroaki Nemoto ,  Ichiro Tamai ,  Ikuko Takekuma

    发明人： Yoshiyuki Hirayama ,  Hiroyuki Nakagawa ,  Hiroaki Nemoto ,  Ichiro Tamai ,  Ikuko Takekuma

    IPC分类号： G11B5/66

    CPC分类号： B82Y10/00 ,  G11B5/656 ,  G11B5/66 ,  G11B5/7325 ,  G11B5/743 ,  Y10T428/24802

    摘要： A perpendicular magnetic recording medium includes an intermediate film formed of a plurality of layers between a soft magnetic film and a perpendicular magnetization film. The intermediate film includes at least two layers, i.e., an oxygen-containing layer, or a nonmetallic element-containing layer containing nitrogen, silicon or carbon, and a metallic layer formed on a surface side of the oxygen-containing layer or the nonmetallic element-containing layer. The metallic layer includes a plurality of isolated island-shaped structures. Crystal grains of the perpendicular magnetization film are formed so as to correspond to the isolated island-shaped structures. As a result, a high recording density is obtained.

    摘要翻译： 垂直磁记录介质包括由软磁膜和垂直磁化膜之间的多层形成的中间膜。 中间膜包括至少两层，即含氧层或含有氮，硅或碳的非金属元素层，以及在含氧层或非金属元素的表面侧上形成的金属层 包含层。 金属层包括多个孤立的岛状结构。 垂直磁化膜的晶粒形成为对应于孤立的岛状结构。 结果，获得高记录密度。

    PERPENDICULAR MAGNETIC RECORDING MEDIUM WITH GRANULAR STRUCTURED MAGNETIC RECORDING LAYER, METHOD FOR PRODUCING THE SAME, AND MAGNETIC RECORDING APPARATUS
    7.
    发明申请
    PERPENDICULAR MAGNETIC RECORDING MEDIUM WITH GRANULAR STRUCTURED MAGNETIC RECORDING LAYER, METHOD FOR PRODUCING THE SAME, AND MAGNETIC RECORDING APPARATUS 审中-公开
    具有颗粒结构的磁记录层的周期性磁记录介质，其制造方法和磁记录装置

    公开(公告)号：US20080186627A1

    公开(公告)日：2008-08-07

    申请号：US12061518

    申请日：2008-04-02

    申请人： Yoshiyuki Hirayama ,  Ikuko Takekuma ,  Ichiro Tamai

    发明人： Yoshiyuki Hirayama ,  Ikuko Takekuma ,  Ichiro Tamai

    IPC分类号： G11B5/33 ,  G11B5/66 ,  C23C14/34

    CPC分类号： G11B5/7325 ,  C23C14/06 ,  C23C14/3492 ,  G11B5/65 ,  G11B5/851 ,  Y02T50/67

    摘要： Embodiments of the invention provide a perpendicular magnetic recording medium having a granular structured magnetic recording layer including many columnar grains, and grain boundary layers containing oxide, wherein a high medium S/N ratio is obtained while securing head flyability and durability. In an embodiment, the perpendicular magnetic recording medium includes a granular structured magnetic recording layer having many columnar grains, as well as grain boundary layers including oxide respectively. Assuming that the columnar grains are divided equally in the film thickness direction into a protective layer side portion and an intermediate layer side portion, and the diameter of the protective layer side portion is larger than that of the intermediate layer side portion.

    摘要翻译： 本发明的实施例提供一种垂直磁记录介质，其具有包括许多柱状颗粒的粒状结构磁记录层和含有氧化物的晶界层，其中在确保磁头可飞行性和耐久性的同时获得高介质S / N比。 在一个实施例中，垂直磁记录介质包括具有许多柱状晶粒的颗粒结构磁记录层以及分别包括氧化物的晶界层。 假设柱状晶粒在膜厚度方向上被均等地分割成保护层侧部分和中间层侧部分，并且保护层侧部分的直径大于中间层侧部分的直径。

    Perpendicular magnetic recording medium and magnetic storage apparatus using the same
    9.
    发明授权
    Perpendicular magnetic recording medium and magnetic storage apparatus using the same 有权
    垂直磁记录介质及使用其的磁存储装置

    公开(公告)号：US07701667B2

    公开(公告)日：2010-04-20

    申请号：US11651922

    申请日：2007-01-09

    申请人： Ichiro Tamai ,  Ikuko Takekuma ,  Hiroaki Nemoto ,  Yoshiyuki Hirayama

    发明人： Ichiro Tamai ,  Ikuko Takekuma ,  Hiroaki Nemoto ,  Yoshiyuki Hirayama

    IPC分类号： G11B5/66

    CPC分类号： G11B5/66 ,  G11B5/656 ,  G11B5/667

    摘要： Embodiments in accordance with the present invention provide a perpendicular recording medium with low noise and high recording density by reducing the effects from noise generated from the vicinity of the interface with the intermediate layer of the recording layer, in a perpendicular recording medium utilizing a granular recording layer containing oxygen or oxide additive in a cobalt-chromium alloy formed on an intermediate layer with a ruthenium or ruthenium alloy layer. A first recording layer and a second recording layer are formed in order on an intermediate layer of ruthenium or ruthenium alloy. The first recording layer and the second recording layer are comprised of cobalt as the main material in a granular structure containing chromium and oxygen. The saturation magnetization of the first recording layer is lower than the saturation magnetization of the second recording layer. When a first recording layer saturation magnetization is set as Ms1(emu per cubic centimeter), a second recording layer saturation magnetization is set as Ms2(emu per cubic centimeter), and the first recording layer film thickness is set to t1 (nm), then (Ms2−Ms1)×t1 will be larger than 0 (memu per square centimeter) and smaller than 0.15 (memu per square centimeter).

    摘要翻译： 根据本发明的实施例通过减少在与记录层的中间层的界面附近产生的噪声的影响，在使用粒状记录的垂直记录介质中提供具有低噪声和高记录密度的垂直记录介质 在含有钌或钌合金层的中间层上形成的钴 - 铬合金中含有氧或氧化物添加剂的层。 在钌或钌合金的中间层上依次形成第一记录层和第二记录层。 第一记录层和第二记录层由包含铬和氧的颗粒结构中的钴作为主要材料组成。 第一记录层的饱和磁化强度低于第二记录层的饱和磁化强度。 当第一记录层的饱和磁化强度设定为Ms1（emu /立方厘米）时，第二记录层的饱和磁化强度设定为Ms2（emu /立方厘米），第一记录层膜厚设定为t1（nm） 那么（Ms2-Ms1）×t1将大于0（每平方厘米的记忆），小于0.15（每平方厘米的记忆）。

    Perpendicular magnetic recording medium and manufacturing of the same
    10.
    发明授权
    Perpendicular magnetic recording medium and manufacturing of the same 失效
    垂直磁记录介质和制造相同

    公开(公告)号：US07651795B2

    公开(公告)日：2010-01-26

    申请号：US11227675

    申请日：2005-09-14

    申请人： Ichiro Tamai ,  Ikuko Takekuma ,  Yoshiyuki Hirayama ,  Yuzuru Hosoe ,  Yoshinori Honda

    发明人： Ichiro Tamai ,  Ikuko Takekuma ,  Yoshiyuki Hirayama ,  Yuzuru Hosoe ,  Yoshinori Honda

    IPC分类号： G11B5/65

    CPC分类号： G11B5/7325 ,  G11B5/65 ,  G11B5/656

    摘要： Embodiments of the embodiment are directed to reducing the inter-granular exchange coupling of an oxide granular medium and obtaining a high media S/N value, resulting in an areal recording density greater than 23 gigabits per square centimeter or more being achieved. In one embodiment, a magnetic recording medium comprises a structure laminating a soft-magnetic underlayer, a lower intermediate layer including Ru, an upper intermediate layer consisting of Ru crystal grains and oxide crystal grain boundaries, a magnetic recording layer consisting of crystal grains and oxide crystal grain boundaries, in order, on a substrate, growing crystal grains of the magnetic recording layer epitaxially on the Ru crystal grains of the upper intermediate layer, and growing the crystal grain boundaries of the magnetic recording layer on the crystal grain boundaries of the upper intermediate layer.

    摘要翻译： 实施例的实施例涉及减少氧化物颗粒介质的颗粒间交换耦合并获得高介质S / N值，导致实现大于23千兆比特/平方厘米或更大的面积记录密度。 在一个实施例中，磁记录介质包括层压软磁性底层，包含Ru的下中间层，由Ru晶粒和氧化物晶界组成的上中间层的结构，由晶粒和氧化物组成的磁记录层 晶粒边界依次在衬底上，外延地在上层中间层的Ru晶粒上生长磁记录层的晶粒，并且使上述记录层的晶界上的磁记录层的晶界生长 中间层。