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    Amorphous soft magnetic layers for perpendicular magnetic recording media
    21.
    发明申请
    Amorphous soft magnetic layers for perpendicular magnetic recording media 审中-公开
    用于垂直磁记录介质的无定形软磁层

    公开(公告)号：US20080085427A1

    公开(公告)日：2008-04-10

    申请号：US11544632

    申请日：2006-10-10

    申请人： Erol Girt ,  Raj N. Thangaraj ,  Qixu Chen

    发明人： Erol Girt ,  Raj N. Thangaraj ,  Qixu Chen

    IPC分类号： G11B5/66

    CPC分类号： G11B5/667 ,  H01F10/132 ,  H01F41/32

    摘要： A corrosion resistant perpendicular magnetic recording medium comprises: (a) a non-magnetic substrate having a surface; and (b) a layer stack formed over the substrate surface and comprising, in overlying sequence from the surface: (i) a magnetically soft underlayer (SUL); (ii) at least one non-magnetic interlayer; and (iii) at least one magnetically hard perpendicular recording layer; wherein the SUL comprises an FeCo-based alloy material having a composition selected to provide: (1) a substantially amorphous microstructure with a smooth surface in contact with the non-magnetic interlayer; (2) high saturation magnetization Ms greater than about 1.6 T; and (3) corrosion resistance.

    摘要翻译： 耐腐蚀垂直磁记录介质包括：（a）具有表面的非磁性基材; 和（b）在所述基板表面上形成的层叠层，并且以从所述表面重叠的顺序包括：（i）磁软底层（SUL）; （ii）至少一个非磁性中间层; 和（iii）至少一个磁性硬的垂直记录层; 其中所述SUL包括FeCo基合金材料，所述FeCo基合金材料的组成被选择为提供：（1）具有与所述非磁性中间层接触的光滑表面的基本无定形的微结构; （2）高饱和磁化强度Ms大于约1.6T; 和（3）耐腐蚀性。

    High coercivity, low noise magnetic recording medium comprising an intermediate cocrtaox layer
    24.
    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。

    Granular perpendicular media with surface treatment for improved magnetic properties and corrosion resistance
    27.
    发明授权
    Granular perpendicular media with surface treatment for improved magnetic properties and corrosion resistance 有权
    具有表面处理的颗粒垂直介质，用于改善磁性能和耐腐蚀性

    公开(公告)号：US07169488B2

    公开(公告)日：2007-01-30

    申请号：US10705069

    申请日：2003-11-10

    申请人： Qixu Chen ,  Tom Nolan ,  Raj Nagappan Thangaraj ,  Zhong (Stella) Wu ,  Samuel Dacke Harkness

    发明人： Qixu Chen ,  Tom Nolan ,  Raj Nagappan Thangaraj ,  Zhong (Stella) Wu ,  Samuel Dacke Harkness

    IPC分类号： G11B5/66 ,  G11B5/70

    CPC分类号： G11B5/732 ,  G11B5/65 ,  G11B5/667 ,  G11B5/72 ,  G11B5/8408 ,  G11B5/851 ,  G11B2005/0029

    摘要： A granular perpendicular magnetic recording medium having a surface treated magnetic layer comprising an oxidized or nitrogenized boundary layer formed on the surface of the magnetic layer, wherein the magnetic layer comprises granular magnetic regions having oxygen and/or nitrogen-containing grain boundaries. In one embodiment, the granular perpendicular recording medium further comprises a soft magnetic layer below the surface treated granular magnetic layer and a protective overcoat over the surface treated granular magnetic layer. A method of manufacturing a granular perpendicular magnetic recording medium includes depositing a magnetic layer having granular structure over a substrate and subsequently surface treating the granular magnetic layer in an oxygen and/or nitrogen-containing atmosphere to produce an oxidized and/or nitrogenized boundary layer formed on the surface of the granular magnetic layer. The granular perpendicular magnetic recording medium of the present invention exhibits high Hc and SNR while exhibiting improved corrosion resistance and contact start-stop performance.

    摘要翻译： 一种具有表面处理的磁性层的颗粒状垂直磁记录介质，包括形成在磁性层的表面上的氧化或氮化的边界层，其中磁性层包括具有氧和/或含氮晶界的颗粒状磁性区域。 在一个实施例中，粒状垂直记录介质还包括在表面处理的颗粒磁性层下方的软磁性层和在表面处理过的颗粒状磁性层上的保护性外涂层。 一种制造粒状垂直磁记录介质的方法包括在衬底上沉积具有粒状结构的磁性层，随后在氧和/或含氮气氛中表面处理粒状磁性层，以形成形成的氧化和/或氮化的边界层 在粒状磁性层的表面上。 本发明的粒状垂直磁记录介质表现出高的Hc和SNR，同时具有改进的耐腐蚀性和接触起止性能。

    Magnetic recording media comprising a silicon carbide corrosion barrier layer and a c-overcoat
    28.
    发明授权
    Magnetic recording media comprising a silicon carbide corrosion barrier layer and a c-overcoat 失效
    磁记录介质包括碳化硅腐蚀阻挡层和c覆盖层

    公开(公告)号：US06572958B1

    公开(公告)日：2003-06-03

    申请号：US09621530

    申请日：2000-07-21

    申请人： Kueir-Weei Chour ,  Liji Huang ,  Jie-Ming Yu ,  Kuo-Hsing Hwang ,  Chung Shih ,  Lin Huang ,  Charles Leu ,  Qixu Chen ,  Rajiv Yadav Ranjan

    发明人： Kueir-Weei Chour ,  Liji Huang ,  Jie-Ming Yu ,  Kuo-Hsing Hwang ,  Chung Shih ,  Lin Huang ,  Charles Leu ,  Qixu Chen ,  Rajiv Yadav Ranjan

    IPC分类号： G11B572

    CPC分类号： G11B5/8408 ,  G11B5/72 ,  Y10T428/2495 ,  Y10T428/265

    摘要： A magnetic recording medium is provided with a dual layer protective overcoat system comprising a SiC corrosion barrier layer and a carbon-containing protective overcoat thereon. The SiC layer effectively prevents or significantly reduces Co and Ni diffusion to the medium surface. Embodiments include magnetic recording media comprising a SiC corrosion barrier layer over a magnetic layer, an overlying protective layer of amorphous hydrogenated carbon, amorphous nitrogenated carbon or amorphous hydrogen-nitrogenated carbon, and a lubricant topcoat thereon. Embodiments of the present invention further include magnetic recording media comprising Ni—P plated aluminum, Ni-plated glass or non-conductive substrates including glass, glass-ceramic and ceramic materials. Embodiments of the present invention further include a dual protective overcoat system having a combined thickness less than about 100 Å, such as less than about 75 Å, e.g., less than about 50 Å, with the SiC corrosion barrier layer having a thickness ranging from 1 Å to 40 Å.

    摘要翻译： 磁记录介质设置有双层保护外涂层系统，其包括SiC腐蚀阻挡层和其上的含碳保护外涂层。 SiC层有效地防止或显着减少Co和Ni扩散到介质表面。 实施例包括在磁性层上包含SiC腐蚀阻挡层的磁记录介质，无定形氢化碳的上覆保护层，无定形氮化碳或无定形氢化氮，以及其上的润滑剂面涂层。 本发明的实施例还包括包含Ni-P镀铝，镀Ni玻璃或包括玻璃，玻璃 - 陶瓷和陶瓷材料的非导电衬底的磁记录介质。 本发明的实施方案还包括双重保护外涂层系统，其具有小于约，例如小于约，例如小于约50埃的组合厚度，其中SiC腐蚀阻挡层的厚度范围为1 Å至40Å。

    Magnetic recording medium with grain size control layer
    30.
    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。