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    Low noise magnetic recording medium and method of manufacturing
    2.
    发明授权
    Low noise magnetic recording medium and method of manufacturing 失效
    低噪音磁记录介质及制造方法

    公开(公告)号：US5879783A

    公开(公告)日：1999-03-09

    申请号：US735443

    申请日：1997-01-02

    申请人： Jyh-Kau Chang ,  Qixu Chen ,  Ga-Lane Chen

    发明人： Jyh-Kau Chang ,  Qixu Chen ,  Ga-Lane Chen

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

    CPC分类号： G11B5/732 ,  G11B5/7325 ,  G11B5/8404 ,  Y10S428/90 ,  Y10T428/1275 ,  Y10T428/24355 ,  Y10T428/265

    摘要： A magnetic recording medium exhibiting low medium noise is formed by depositing a seed layer on a glass or a glass-ceramic substrate and oxidizing the deposited seed layer, under controlled conditions to induce controlled surface microroughness. The subsequently sputter deposited underlayer exhibits a fine average grain size, such as less than about 20 nm. The magnetic alloy sputter deposited and epitaxially grown on the underlayer exhibits a fine average grain size, such as less than about 15 nm, and magnetic clusters reduced in size.

    摘要翻译： 通过在玻璃或玻璃 - 陶瓷基片上沉积种子层并在受控条件下氧化沉积的种子层以形成受控表面微粗糙度，形成表现出低介质噪声的磁记录介质。 随后溅射沉积的底层显示出细小的平均晶粒尺寸，例如小于约20nm。 溅射沉积并外延生长在底层上的磁性合金表现出细小的平均晶粒尺寸，例如小于约15nm，磁簇尺寸减小。

    High coercivity, high signal-to-noise ratio dual magnetic layer media
    6.
    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 partially oxidized seed layer
    9.
    发明授权
    Magnetic recording medium with partially oxidized seed layer 失效
    具有部分氧化种子层的磁记录介质

    公开(公告)号：US5866227A

    公开(公告)日：1999-02-02

    申请号：US699759

    申请日：1996-08-20

    申请人： Qixu Chen ,  Ga-Lane Chen

    发明人： Qixu Chen ,  Ga-Lane Chen

    IPC分类号： G11B5/73 ,  G11B5/66

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

    摘要： A magnetic recording medium comprising a glass or glass-ceramic substrate is formed by sequentially depositing thereon a partially oxidized NiP seed layer, an underlayer and a magnetic layer. The partially oxidized NiP seed layer is formed by reactive sputtering in a gas mixture of argon and oxygen. The resulting magnetic recording medium exhibits low medium noise and high coercivity rendering it suitable for high density magnetic recording.

    摘要翻译： 包含玻璃或玻璃 - 陶瓷衬底的磁记录介质通过在其上依次沉积部分氧化的NiP种子层，底层和磁性层而形成。 部分氧化的NiP种子层通过在氩气和氧气的气体混合物中的反应溅射形成。 所得到的磁记录介质表现出低的中等噪声和高矫顽力，使其适用于高密度磁记录。

    High areal density magnetic recording medium with dual magnetic layers
    10.
    发明授权
    High areal density magnetic recording medium with dual magnetic layers 失效
    具有双磁层的高密度磁记录介质

    公开(公告)号：US5763071A

    公开(公告)日：1998-06-09

    申请号：US614848

    申请日：1996-03-11

    申请人： Ga-Lane Chen ,  Qixu Chen

    发明人： Ga-Lane Chen ,  Qixu Chen

    IPC分类号： G11B5/64 ,  G11B5/65 ,  G11B5/66 ,  G11B5/673 ,  G11B5/738

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

    摘要： A magnetic recording medium having a high areal recording density of about 3 to about 20 Gb/in.sup.2, an Mrt of about 0.30 to about 0.60 memu/cm.sup.2, a coercivity greater than 2,500 Oersteds and a coercivity squareness of about 0.70 to about 0.95 is obtained by depositing one or more pairs of magnetic layers comprising a magnetically isotropic layer directly on a magnetically anisotropic layer. Chromium intermediate layers are employed to separate each pair of magnetically isotropic/anisotropic layers. In one embodiment, the magnetically anisotropic layer comprises a cobalt-base alloy containing chromium and tantalum and the magnetically isotropic layer comprises a cobalt-base layer containing chromium, platinum and tantalum.

    摘要翻译： 具有约3至约20Gb / in2的高面密度记录密度，约0.30至约0.60emu / cm 2的Mrt，大于2500奥斯特的矫顽力和约0.70至约0.95的矫顽力矩形度的磁记录介质 通过将包含磁各向同性层的一对或多对磁层直接沉积在磁各向异性层上。 铬中间层用于分离每对磁各向同性/各向异性层。 在一个实施例中，磁各向异性层包括含有铬和钽的钴基合金，并且磁各向同性层包括含有铬，铂和钽的钴基层。