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22 条记录 (耗时 0.032 秒)

    Oriented magnetic medium on a nonmetallic substrate
    2.
    发明授权
    Oriented magnetic medium on a nonmetallic substrate 失效
    在非金属基底上的定向磁性介质

    公开(公告)号：US06670032B2

    公开(公告)日：2003-12-30

    申请号：US09952788

    申请日：2001-09-13

    申请人： David Thomas Margulies ,  Timothy Martin Reith ,  Hoa Do ,  Tim Minvielle ,  James A. Hagan

    发明人： David Thomas Margulies ,  Timothy Martin Reith ,  Hoa Do ,  Tim Minvielle ,  James A. Hagan

    IPC分类号： G11B566

    CPC分类号： G11B5/7315 ,  G11B5/012 ,  Y10S428/90 ,  Y10T428/26 ,  Y10T428/265

    摘要： This invention provides a disk which has an in-plane oriented magnetic recording layer on a glass, ceramic, or other nonmetallic substrate and a method for making the disk. A thin layer of material is deposited on the substrate to form a texture stop layer. A texturable layer is then deposited on the texture stop layer. This texturable layer is textured before the magnetic layer is deposited. The disk combines all the advantages of a glass or ceramic substrate along with the advantages of an oriented magnetic medium.

    摘要翻译： 本发明提供一种在玻璃，陶瓷或其它非金属基底上具有面内定向磁记录层的盘，以及制造该盘的方法。 在衬底上沉积薄层材料以形成纹理停止层。 然后将纹理层叠加在纹理停止层上。 磁性层沉积之前纹理化。 该盘结合玻璃或陶瓷基板的所有优点以及定向磁性介质的优点。

    Laminated magnetic recording medium having improved signal-to-noise ratio
    6.
    发明申请
    Laminated magnetic recording medium having improved signal-to-noise ratio 失效
    具有提高的信噪比的层压磁记录介质

    公开(公告)号：US20050259362A1

    公开(公告)日：2005-11-24

    申请号：US10853431

    申请日：2004-05-24

    申请人： Hoa Do ,  David Margulies ,  Hal Rosen ,  Natacha Supper

    发明人： Hoa Do ,  David Margulies ,  Hal Rosen ,  Natacha Supper

    IPC分类号： G11B5/64 ,  G11B5/66 ,  G11B5/82

    CPC分类号： G11B5/66 ,  G11B5/656 ,  G11B5/82

    摘要： A magnetic recording medium has a laminated magnetic structure with at least three magnetic layers, wherein the magnetic layers have decreasing intrinsic coercivity H0 with distance from the write head. The write field at the center of each magnetic layer is greater than that layer's H0. The magnetic layers have different compositions and/or thicknesses and thereby different values of H0. The alloys used in the middle and upper magnetic layers are relatively “high-moment” alloys that would not ordinarily be used in magnetic recording media because they have relatively low S0NR, but the overall S0NR of the laminated magnetic structure is improved because of the effect of lamination. The middle and upper magnetic layers can be made substantially thinner, which enables the magnetic layers to be located closer to the write head, thereby exposing each of the magnetic layers to a higher write field.

    摘要翻译： 磁记录介质具有至少三个磁性层的层叠磁性结构，其中磁性层具有与写头距离更小的固有矫顽力H 0 0。 每个磁性层的中心处的写入场大于该层的H 0 0。 磁性层具有不同的组成和/或厚度，从而具有不同的H 0 O值。 在中上层磁性层中使用的合金是相对“高力矩”的合金，它们通常不会用于磁记录介质，因为它们具有相对较低的S O N，但总体上S 0得到改善。 可以使中上层磁性层和上磁性层实质上更薄，这使得磁层能够更靠近写入头位置，从而将每个磁性层暴露于较高的写入场。

    Magnetic recording disk with antiferromagnetically-coupled magnetic layer having multiple ferromagnetically-coupled lower layers
    7.
    发明申请
    Magnetic recording disk with antiferromagnetically-coupled magnetic layer having multiple ferromagnetically-coupled lower layers 失效
    具有反铁磁耦合磁性层的磁记录盘具有多个铁磁耦合的下层

    公开(公告)号：US20050214586A1

    公开(公告)日：2005-09-29

    申请号：US10808020

    申请日：2004-03-23

    申请人： Hoa Do ,  Eric Fullerton ,  David Margulies ,  Andreas Moser

    发明人： Hoa Do ,  Eric Fullerton ,  David Margulies ,  Andreas Moser

    IPC分类号： G11B5/64 ,  G11B5/66 ,  G11B5/72

    CPC分类号： G11B5/66 ,  G11B5/656

    摘要： A magnetic recording disk has an antiferromagnetically-coupled (AFC) structure that has an upper ferromagnetic layer (UL), and a lower ferromagnetic layer structure formed of two ferromagnetically-coupled lower layers (LL1, LL2). The UL is antiferromagnetically-coupled to the lower layer structure across an antiferromagnetically-coupling layer. LL1 and LL2 are ferromagnetically coupled across a ferromagnetic coupling layer so the magnetizations of LL1 and LL2 remain parallel in each remanent magnetic state, but are antiparallel to the magnetization of the UL in each remanent magnetic state. The UL has an Mrt greater than the sum of the Mrt values of LL1 and LL2.

    摘要翻译： 磁记录盘具有反铁磁耦合（AFC）结构，其具有上铁磁层（UL）和由两个铁磁耦合的下层（LL 1，LL 2）形成的低铁磁层结构。 UL通过反铁磁耦合层与下层结构反铁磁耦合。 LL 1和LL 2横跨铁磁耦合层铁磁耦合，因此LL 1和LL 2的磁化在每个剩余磁性状态下保持平行，但在每个剩余磁状态下与UL的磁化反平行。 UL具有大于LL1和LL2的Mrt值之和的Mrt。

    Thin carbon overcoat and method of its making
    8.
    发明授权
    Thin carbon overcoat and method of its making 失效
    薄碳外套及其制作方法

    公开(公告)号：US5567512A

    公开(公告)日：1996-10-22

    申请号：US134216

    申请日：1993-10-08

    申请人： Ga-Lane Chen ,  Hoa Do

    发明人： Ga-Lane Chen ,  Hoa Do

    IPC分类号： C23C14/06 ,  G11B5/64 ,  G11B5/72 ,  G11B5/725 ,  G11B5/73 ,  G11B5/82 ,  G11B5/84 ,  G11B5/66 ,  B32B5/16 ,  B32B9/00 ,  C23C14/00

    CPC分类号： G11B5/8408 ,  C23C14/0605 ,  G11B5/72 ,  Y10S428/90 ,  Y10T428/26 ,  Y10T428/265 ,  Y10T428/30

    摘要： A thin film magnetic disc having a carbon overcoat which is characterized by (i) a surface density of nitrogen atoms between 3-8.times.10.sup.16 atoms/cm.sup.2, as determined by Rutherford backscatter spectroscopy, and (ii) an erosion rate, as measured by rate of erosion of the overcoat by an Al.sub.2 O.sub.3 particle tape placed in contact with the medium, that is several times less than that of a carbon overcoat having the same thickness, but formed by sputtering under a pure argon atmosphere. The overcoat has a preferred thickness between 80-150 .ANG.. Also disclosed is a method of producing a thin, wear-resistant carbon overcoat.

    摘要翻译： 一种具有碳外涂层的薄膜磁盘，其特征在于：（i）由Rutherford反向散射光谱测定的氮原子的表面密度在3-8×10 16原子/ cm 2之间，和（ii）通过速率 通过与介质接触的Al 2 O 3颗粒带侵蚀外涂层，比具有相同厚度的碳外涂层小，但是在纯氩气氛下通过溅射形成。 外涂层的优选厚度在80-150安培之间。 还公开了一种生产薄的，耐磨的碳外涂层的方法。

    Perpendicular magnetic recording disk with improved recording layer having high oxygen content
    10.
    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。