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159 条记录 (耗时 0.042 秒)

    Magnetic recording medium with dual magnetic layers and high in-plane coercivity
    11.
    发明授权
    Magnetic recording medium with dual magnetic layers and high in-plane coercivity 失效
    具有双磁性层和高平面矫顽力的磁记录介质

    公开(公告)号：US06461750B1

    公开(公告)日：2002-10-08

    申请号：US09406816

    申请日：1999-09-28

    申请人： Qixu (David) Chen ,  Lin Huang ,  Charles Leu ,  Rajiv Yadav Ranjan

    发明人： Qixu (David) Chen ,  Lin Huang ,  Charles Leu ,  Rajiv Yadav Ranjan

    IPC分类号： G11B566

    CPC分类号： G11B5/66 ,  Y10S428/90

    摘要： A magnetic recording media is formed with high in-plane coercivity employing dual magnetic layers. The first magnetic layer is sputter deposited in a chamber employing a shield such that the minimum incident angle of impinging atoms is relatively large, e.g., greater than about 26°. Embodiments of the present invention comprise depositing a NiAl seedlayer, a Cr or Cr alloy underlayer and a first CoCrTa magnetic layer at a thickness less than about 50Å for inducing the preferred (10.0) crystallographic orientation in the subsequently deposited second magnetic layer, e.g., CoCrPtTa or CoCrPtTaNb having a high Cr content of about 16 to about 21 at. %.

    摘要翻译： 使用双磁性层形成具有高的平面内矫顽力的磁记录介质。 将第一磁性层溅射沉积在采用屏蔽的腔室中，使得入射原子的最小入射角相对较大，例如大于约26°。 本发明的实施方案包括沉积厚度小于约50埃的NiAl种子层，Cr或Cr合金底层和第一CoCrTa磁性层，用于在随后沉积的第二磁性层中诱导优选的（10.0）晶体取向，例如CoCrPtTa 或具有约16至约21at的高Cr含量的CoCrPtTaNb。 ％。

    Magnetic recording medium with grain size control layer
    17.
    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
    18.
    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

    Magnetic recording medium with low temperature seedlayer for high signal-to-noise ratio
    19.
    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。