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    Magnetic recording medium with low temperature seedlayer for high signal-to-noise ratio
    2.
    发明授权
    Magnetic recording medium with low temperature seedlayer for high signal-to-noise ratio 失效
    磁记录介质采用低温种子层，信噪比高

    公开(公告)号：US6139951A

    公开(公告)日：2000-10-31

    申请号：US188683

    申请日：1998-11-10

    申请人： Qixu Chen ,  Xing Song ,  Charles Leu ,  Rajiv Ranjan

    发明人： Qixu Chen ,  Xing Song ,  Charles Leu ,  Rajiv Ranjan

    IPC分类号： G11B5/73 ,  G11B5/84 ,  G11B5/66

    CPC分类号： G11B5/732 ,  G11B5/7325 ,  G11B5/8404 ,  Y10S428/90 ,  Y10T428/26 ,  Y10T428/265

    摘要： A magnetic recording medium exhibiting high remanent coercivity and low noise is produced by depositing a first NiAl seedlayer on a non-magnetic substrate, e.g., glass, ceramic or glass-ceramic material, at a relatively low temperature, and subsequently depositing a second NiAl seedlayer on the first seedlayer at a relatively higher temperature. Embodiments include depositing a first NiAl seedlayer at a temperature less than about 120.degree. C., e.g., less than about 100.degree. C., and depositing a second NiAl seedlayer thereon at a temperature greater than about 200.degree. C., e.g. greater than about 230.degree. C. Embodiments also include depositing a Cr-alloy underlayer, CrV, on the second seedlayer.

    摘要翻译： 通过在相对较低的温度下在非磁性基底（例如玻璃，陶瓷或玻璃 - 陶瓷材料）上沉积第一NiAl种子层，并且随后沉积第二NiAl种子层来产生表现出高剩余矫顽力和低噪声的磁记录介质 在相对较高的温度下在第一种子层上。 实施方案包括在低于约120℃（例如小于约100℃）的温度下沉积第一NiAl种子层，并在其上沉积第二NiAl种层，其温度大于约200℃，例如约200℃。 大于约230℃。实施例还包括在第二种子层上沉积Cr合金底层CrV。

    High coercivity, low noise magnetic recording medium comprising an intermediate cocrtaox layer
    3.
    发明授权
    High coercivity, low noise magnetic recording medium comprising an intermediate cocrtaox layer 失效
    高矫顽力，低噪声磁记录介质，包括中间共沉淀层

    公开(公告)号：US06242086B1

    公开(公告)日：2001-06-05

    申请号：US09188682

    申请日：1998-11-10

    申请人： Xing Song ,  Qixu Chen ,  Charles Leu ,  Rajiv Yadav Ranjan

    发明人： Xing Song ,  Qixu Chen ,  Charles Leu ,  Rajiv Yadav Ranjan

    IPC分类号： G11B5738

    CPC分类号： G11B5/66 ,  G11B5/851 ,  Y10S428/90 ,  Y10T428/265

    摘要： High areal density magnetic recording media are formed with a thin CoCrTaOx intermediate layer which provides appropriate crystalline orientation and surface morphology for the nucleation and growth of a magnetic layer thereon having increased coercivity and high squareness, while avoiding high substrate heating temperatures. Embodiments include sputter depositing an intermediate layer comprising Co, about 10 to about 20 atomic % Cr and about 1 to about 6 atomic % Ta, at a thickness of about 1.5 to about 18 Å on a Cr or Cr alloy underlayer, allowing partial oxidation of the surface of the intermediate layer by residual oxygen in the sputtering system, and then sputter depositing a CoCrPtTa magnetic alloy layer thereon.

    摘要翻译： 高密度磁记录介质用薄的CoCrTaOx中间层形成，其提供适当的结晶取向和表面形态，用于其上具有增强矫顽力和高矩形度的磁性层的成核和生长，同时避免高的基板加热温度。 实施方案包括在Cr或Cr合金底层上以约1.5至约18的厚度溅射沉积包含Co，约10至约20原子％Cr和约1至约6原子％Ta的中间层，允许部分氧化 中间层的表面通过溅射系统中的残余氧，然后在其上溅射沉积CoCrPtTa磁性合金层。

    Magnetic recording medium with grain size control layer
    6.
    发明授权
    Magnetic recording medium with grain size control layer 失效
    具有晶粒尺寸控制层的磁记录介质

    公开(公告)号：US6132863A

    公开(公告)日：2000-10-17

    申请号：US161427

    申请日：1998-09-24

    申请人： Xing Song ,  Qixu Chen ,  Charles Leu ,  Rajiv Y. Ranjan

    发明人： Xing Song ,  Qixu Chen ,  Charles Leu ,  Rajiv Y. Ranjan

    IPC分类号： G11B5/73 ,  G11B5/66

    CPC分类号： G11B5/7325 ,  Y10S428/90 ,  Y10T428/26 ,  Y10T428/265

    摘要： Simultaneous crystallographic orientation and grain size refinement of the magnetic layer are achieved by depositing a grain size control layer on a underlayer. Embodiments include depositing a CrV grain size control layer on a Cr underlayer at thickness ratio of underlayer to grain size control layer of about 0.5 to about 2. Magnetic layers having a grain size of about 100 .ANG. to about 250 .ANG., e.g. at 180 .ANG. to about 220 .ANG., are achieved.

    摘要翻译： 通过在底层上沉积晶粒尺寸控制层来实现磁性层的同时晶体取向和晶粒尺寸细化。 实施方案包括将CrV晶粒尺寸控制层沉积在Cr底层上，其底层与晶粒尺寸控制层的厚度比为约0.5至约2.具有约100至约250范围内的晶粒尺寸的磁性层。 在180 ANGSTROM到约220 ANGSTROM。

    High coercivity, high signal-to-noise ratio dual magnetic layer media
    7.
    发明授权
    High coercivity, high signal-to-noise ratio dual magnetic layer media 有权
    高矫顽力，高信噪比双磁层介质

    公开(公告)号：US06168861A

    公开(公告)日：2001-01-02

    申请号：US09188677

    申请日：1998-11-10

    申请人： Qixu Chen ,  Xing Song ,  Charles Leu ,  Rajiv Yadau Ranjan ,  Ga-Lane Chen

    发明人： Qixu Chen ,  Xing Song ,  Charles Leu ,  Rajiv Yadau Ranjan ,  Ga-Lane Chen

    IPC分类号： G11B566

    CPC分类号： G11B5/66 ,  Y10S428/90 ,  Y10T428/26 ,  Y10T428/265

    摘要： A high areal density magnetic recording medium with high remanent coercivity and high signal-to-noise ratio is formed with dual magnetic layers, the first or lower magnetic layer having a higher saturation magnetization than the second or upper magnetic layer. Embodiments include first and second magnetic layers containing Co and Pt, wherein the first magnetic layer comprises less platinum than the second, e.g., a first magnetic layer of Co15%Cr8%Pt4%Ta and a second magnetic layer of Co15%Cr11%Pt4%Ta.

    摘要翻译： 形成具有高剩磁矫顽力和高信噪比的高密度磁记录介质，具有双磁性层，第一或下磁层具有比第二或上磁层更高的饱和磁化强度。 实施例包括含有Co和Pt的第一和第二磁性层，其中第一磁性层包含比第二磁性层少的铂，例如Co15％Cr8％Pt4％Ta的第一磁性层和Co15％Cr11％Pt4％的第二磁性层， Ta

    Substantially isotropic magnetic recording medium comprising a seedlayer
    8.
    发明授权
    Substantially isotropic magnetic recording medium comprising a seedlayer 有权
    包括种子层的基本上各向同性的磁记录介质

    公开(公告)号：US6146754A

    公开(公告)日：2000-11-14

    申请号：US145762

    申请日：1998-09-02

    申请人： Xing Song ,  Qixu Chen ,  Charles Leu ,  Rajiv Yadav Ranjan

    发明人： Xing Song ,  Qixu Chen ,  Charles Leu ,  Rajiv Yadav Ranjan

    IPC分类号： G11B5/73 ,  G11B5/84 ,  G11B5/66

    CPC分类号： G11B5/732 ,  G11B5/8404 ,  Y10S428/90 ,  Y10T428/26 ,  Y10T428/265

    摘要： A high areal density magnetic recording medium exhibiting high Hc, high SNR, high S* and substantially isotropic magnetic properties is achieved by depositing a thin seedlayer before depositing the underlayer. Embodiments include heating the seedlayer under vacuum in the presence of residual oxygen to induce appropriate crystalline orientation and surface morphology for nucleation and growth of the underlayer and magnetic layer having substantially isotropic magnetic properties.

    摘要翻译： 通过在沉积底层之前沉积薄的种子层，实现了表现出高Hc，高SNR，高S *和基本上各向同性磁性的高密度磁记录介质。 实施方案包括在存在残余氧的情况下在真空下加热种子层，以诱导适当的晶体取向和表面形态，用于具有基本上各向同性磁性的底层和磁性层的成核和生长。

    High coercivity magnetic recording medium comprising a thin CoCrTa intermediate layer
    10.
    发明授权
    High coercivity magnetic recording medium comprising a thin CoCrTa intermediate layer 有权
    包含薄CoCrTa中间层的高矫顽力磁记录介质

    公开(公告)号：US06150016A

    公开(公告)日：2000-11-21

    申请号：US188681

    申请日：1998-11-10

    申请人： Xing Song ,  Qixu Chen ,  Charles Leu ,  Rajiv Y. Ranjan

    发明人： Xing Song ,  Qixu Chen ,  Charles Leu ,  Rajiv Y. Ranjan

    IPC分类号： G11B5/66 ,  G11B5/851

    CPC分类号： G11B5/851 ,  G11B5/66 ,  Y10S428/90 ,  Y10T428/26 ,  Y10T428/265

    摘要： A high areal density magnetic recording medium exhibiting high remanent coercivity and high coercivity squareness is formed with a thin CoCrTa intermediate layer to provide appropriate crystalline orientation and surface morphology for nucleation and growth of a magnetic layer thereon. The present invention also enables the use of lower substrate heating temperatures during deposition. Embodiments include depositing an intermediate Co alloy layer comprising about 10 up to about 15 atomic % Cr and about 1 to about 6 atomic % Ta at a thickness of about 1.5 to about 150 .ANG..

    摘要翻译： 利用薄的CoCrTa中间层形成表现出高剩磁矫顽力和高矫顽力矩形度的高密度磁记录介质，为其上的磁性层的成核和生长提供适当的晶体取向和表面形态。 本发明还能够在沉积期间使用较低的基板加热温度。 实施方案包括沉积包含约10至约15原子％Cr和约1至约6原子％Ta的中间Co合金层，厚度为约1.5至约150埃。