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    Perpendicular magnetic recording disk with improved recording layer having high oxygen content
    2.
    发明申请
    Perpendicular magnetic recording disk with improved recording layer having high oxygen content 有权
    垂直磁记录盘，具有改善的氧含量高的记录层

    公开(公告)号：US20060269799A1

    公开(公告)日：2006-11-30

    申请号：US11135750

    申请日：2005-05-24

    申请人： Hoa Do ,  Bernd Heinz ,  Yoshihiro Ikeda ,  Kentaro Takano ,  Min Xiao

    发明人： Hoa Do ,  Bernd Heinz ,  Yoshihiro Ikeda ,  Kentaro Takano ,  Min Xiao

    IPC分类号： G11B5/65

    CPC分类号： G11B5/65 ,  G11B5/656 ,  G11B5/66 ,  G11B5/667 ,  G11B5/732

    摘要： A perpendicular magnetic recording disk has an improved recording layer of a granular CoPtCr-based ferromagnetic alloy with inter-granular material made up of one or more oxides of Cr and one or more oxides of one or more of a segregant of Si, Ta, Ti, B, Nb or Hf, wherein the amount of oxygen present in the recording layer is greater than about 22 atomic percent and less than about 35 atomic percent. The amount of oxygen in the recording layer is substantially greater than the amount required for the stoichiometric oxide or oxides of the segregant or segregants, and a substantial portion of the oxygen present in the recording layer is present in the inter-granular material. The recording layer exhibits high signal-to-noise ratio (SNR), a coercivity Hc greater than about 5000 Oe and a nucleation field Hn greater (more negative) than about −1500 Oe.

    摘要翻译： 垂直磁记录盘具有改进的基于CoPtCr的铁磁性合金的记录层，其具有由一种或多种Cr的一种或多种氧化物和一种或多种Si，Ta，Ti分离的一种或多种氧化物构成的颗粒间材料 ，B，Nb或Hf，其中存在于记录层中的氧的量大于约22原子％且小于约35原子％。 记录层中的氧气量基本上大于分离器或分离器的化学计量氧化物或氧化物所需的量，并且记录层中存在的大部分氧气存在于颗粒间材料中。 记录层表现出高的信噪比（SNR），大于约5000Oe的矫顽力H c和大于（更负）的成核场H N n 约-1500 Oe。

    Perpendicular magnetic recording disk with improved recording layer having high oxygen content
    7.
    发明授权
    Perpendicular magnetic recording disk with improved recording layer having high oxygen content 有权
    垂直磁记录盘，具有改善的氧含量高的记录层

    公开(公告)号：US07482071B2

    公开(公告)日：2009-01-27

    申请号：US11135750

    申请日：2005-05-24

    申请人： Hoa Van Do ,  Bernd Heinz ,  Yoshihiro Ikeda ,  Kentaro Takano ,  Min Xiao

    发明人： Hoa Van Do ,  Bernd Heinz ,  Yoshihiro Ikeda ,  Kentaro Takano ,  Min Xiao

    IPC分类号： G11B5/66

    CPC分类号： G11B5/65 ,  G11B5/656 ,  G11B5/66 ,  G11B5/667 ,  G11B5/732

    摘要： A perpendicular magnetic recording disk has an improved recording layer of a granular CoPtCr-based ferromagnetic alloy with inter-granular material made up of one or more oxides of Cr and one or more oxides of one or more of a segregant of Si, Ta, Ti, B, Nb or Hf, wherein the amount of oxygen present in the recording layer is greater than about 22 atomic percent and less than about 35 atomic percent. The amount of oxygen in the recording layer is substantially greater than the amount required for the stoichiometric oxide or oxides of the segregant or segregants, and a substantial portion of the oxygen present in the recording layer is present in the inter-granular material. The recording layer exhibits high signal-to-noise ratio (SNR), a coercivity Hc greater than about 5000 Oe and a nucleation field Hn greater (more negative) than about −1500 Oe.

    摘要翻译： 垂直磁记录盘具有改进的基于CoPtCr的铁磁性合金的记录层，其具有由一种或多种Cr的一种或多种氧化物和一种或多种Si，Ta，Ti分离的一种或多种氧化物构成的颗粒间材料 ，B，Nb或Hf，其中存在于记录层中的氧的量大于约22原子％且小于约35原子％。 记录层中的氧气量基本上大于分离器或分离器的化学计量氧化物或氧化物所需的量，并且记录层中存在的大部分氧气存在于颗粒间材料中。 记录层显示出高的信噪比（SNR），矫顽力Hc大于约5000Oe，成核场Hn大于（大于负））大于约-1500Oe。

    Magnetic recording disk with perpendicular magnetic recording layer and multilayered underlayer structure
    8.
    发明授权
    Magnetic recording disk with perpendicular magnetic recording layer and multilayered underlayer structure 失效
    具有垂直磁记录层和多层底层结构的磁记录盘

    公开(公告)号：US06537638B2

    公开(公告)日：2003-03-25

    申请号：US09681056

    申请日：2000-12-13

    申请人： Hoa Do ,  Yoshihiro Ikeda ,  Yoshiaki Sonobe ,  Kentaro Takano

    发明人： Hoa Do ,  Yoshihiro Ikeda ,  Yoshiaki Sonobe ,  Kentaro Takano

    IPC分类号： G11B566

    CPC分类号： G11B5/7325 ,  G11B5/65 ,  Y10S428/90

    摘要： A perpendicular magnetic recording disk has an underlayer structure that causes the magnetic layer to have perpendicular magnetic anisotropy and high signal-to-noise ratio (SNR). The underlayer structure comprises a B2 type body-centered-cubic (BCC) material, such as the binary alloys NiAl, RuAl and RuTi, as an underlayer, and a Ti or TiCr alloy sublayer formed directly on the underlayer. The magnetic layer, such as a CoCrPt alloy, is deposited directly on the sublayer. The magnetic layer has perpendicular magnetic anisotropy due to the sublayer yet excellent SNR because of the smaller grain size of the sublayer material formed directly on the B2 type underlayer.

    摘要翻译： 垂直磁记录盘具有底层结构，其使磁层具有垂直的磁各向异性和高的信噪比（SNR）。 底层结构包括B2型体心立方（BCC）材料，例如作为底层的二元合金NiAl，RuAl和RuTi，以及直接形成在底层上的Ti或TiCr合金子层。 磁性层，如CoCrPt合金，直接沉积在子层上。 由于子层材料直接在B2型底层上形成的较小的晶粒尺寸，所以磁层由于子层而具有良好的SNR，具有垂直的磁各向异性。

    "> Perpendicular Magnetic recording system and medium with high-moment corrosion-resistant
    9.
    发明申请
    Perpendicular Magnetic recording system and medium with high-moment corrosion-resistant "soft" underlayer (SUL) 审中-公开
    垂直磁记录系统和高强度耐腐蚀“软”底层（SUL）

    公开(公告)号：US20090213494A1

    公开(公告)日：2009-08-27

    申请号：US12387091

    申请日：2009-04-27

    申请人： Qing Dai ,  Bernd Heinz ,  Yoshihiro Ikeda ,  Mary Frances Minardi ,  Kentaro Takano

    发明人： Qing Dai ,  Bernd Heinz ,  Yoshihiro Ikeda ,  Mary Frances Minardi ,  Kentaro Takano

    IPC分类号： G11B5/127 ,  G11B5/66 ,  G11B5/65

    CPC分类号： G11B5/667 ,  G11B5/7379

    摘要： A perpendicular magnetic recording disk has a soft magnetic underlayer (SUL) that has high corrosion resistance as well as high moment. The material of the SUL is an alloy comprising Co, Fe, X, and Y; where X is Ta or Nb, Y is Zr or Hf, and the combined amount of X and Y present in the alloy is between about 10 and 20 atomic percent. The atomic ratio of Co to Fe in the alloy is between about 90:10 to 10:90, preferably between about 25:75 and 35:65. The SUL may be a single-layer SUL or a multilayer SUL formed of multiple soft magnetic layers separated by an interlayer film or films.

    摘要翻译： 垂直磁记录盘具有高耐蚀性和高力矩的软磁性底层（SUL）。 SUL的材料是包括Co，Fe，X和Y的合金; 其中X是Ta或Nb，Y是Zr或Hf，合金中存在的X和Y的组合量在约10和20原子％之间。 合金中Co与Fe的原子比为约90:10至10:90，优选约25:75至35:65。 SUL可以是由层间膜或膜分离的多个软磁层形成的单层SUL或多层SUL。

    PERPENDICULAR MAGNETIC RECORDING MEDIUM WITH MULTILAYER RECORDING STRUCTURE INCLUDING INTERGRANULAR EXCHANGE ENHANCEMENT LAYER
    10.
    发明申请
    PERPENDICULAR MAGNETIC RECORDING MEDIUM WITH MULTILAYER RECORDING STRUCTURE INCLUDING INTERGRANULAR EXCHANGE ENHANCEMENT LAYER 审中-公开
    具有多层记录结构的特殊磁记录介质，包括交互式增强层

    公开(公告)号：US20080138662A1

    公开(公告)日：2008-06-12

    申请号：US11567908

    申请日：2006-12-07

    申请人： Andreas Klaus Berger ,  Qing Dai ,  Hoa Van Do ,  Yoshihiro Ikeda ,  David Thomas Margulies ,  Natacha F. Supper ,  Kentaro Takano ,  Min Xiao

    发明人： Andreas Klaus Berger ,  Qing Dai ,  Hoa Van Do ,  Yoshihiro Ikeda ,  David Thomas Margulies ,  Natacha F. Supper ,  Kentaro Takano ,  Min Xiao

    IPC分类号： G11B5/706

    CPC分类号： G11B5/66 ,  G11B5/65

    摘要： A perpendicular magnetic recording medium has a multilayer recording layer (RL) structure that includes a ferromagnetic intergranular exchange enhancement layer for mediating intergranular exchange coupling in the other ferromagnetic layers in the RL structure. The RL structure may be a multilayer of a first ferromagnetic layer (MAG1) of granular polycrystalline Co alloy with Ta-oxide, a second ferromagnetic layer (MAG2) of granular polycrystalline Co alloy with Si-oxide, and an oxide-free CoCr capping layer on top of and in contact with MAG2 for mediating intergranular exchange coupling in MAG1 and MAG2. The RL structure may also be a multilayer of an intergranular exchange enhancement interlayer (IL) in between two ferromagnetic layers, MAG1 and MAG2, each with reduced or no intergranular exchange coupling. Because the IL is in direct contact with both MAG1 and MAG2, it directly mediates intergranular exchange coupling in each of MAG1 and MAG2.

    摘要翻译： 垂直磁记录介质具有多层记录层（RL）结构，其包括用于介导RL结构中的其它铁磁层中的晶间交换耦合的铁磁晶间交换增强层。 RL结构可以是具有Ta氧化物的粒状多晶Co合金的第一铁磁层（MAG1），具有Si氧化物的粒状多晶Co合金的第二铁磁层（MAG 2）和不含无氧化物的CoCr的多层 在MAG1和MAG2之间介导晶间交换耦合的MAG 2顶部并与MAG 2接触的封盖层.RR结构还可以是两个铁磁层之间的晶间交换增强中间层（IL）的多层，MAG 1和MAG 2，每个都有减少或没有晶间交换耦合。 因为IL与MAG 1和MAG 2直接接触，所以它直接介导MAG1和MAG2中的每一个中的晶间交换耦合。