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    High coercivity perpendicular magnetic recording media on polymer substrates
    1.
    发明授权
    High coercivity perpendicular magnetic recording media on polymer substrates 失效
    高矫顽力垂直磁记录介质在聚合物基材上

    公开(公告)号：US07033685B2

    公开(公告)日：2006-04-25

    申请号：US10679419

    申请日：2003-10-07

    申请人： Jean L. Lee ,  Thomas P. Nolan ,  Hong Ying Wang ,  Gary C. Rauch

    发明人： Jean L. Lee ,  Thomas P. Nolan ,  Hong Ying Wang ,  Gary C. Rauch

    IPC分类号： G11B5/667 ,  G11B5/673

    CPC分类号： G11B5/667 ,  G11B5/656 ,  G11B5/8404 ,  Y10T428/24248

    摘要： A method of manufacturing a perpendicular magnetic recording medium, comprises steps of: (a) providing a substrate of an amorphous thermoplastic polymer material having softening and glass transition temperatures as low as about 95° C.; and (b) forming at least one stack of thin film layers atop at least one surface of the substrate, the at least one layer stack including at least one granular magnetic recording layer of perpendicular type, wherein oxides and/or nitrides provide physical de-coupling of adjacent magnetic grains; and wherein each of the thin film layers is formed by depositing at a substrate temperature not greater than about 70° C., and the coercivity (Hc) of the resultant perpendicular magnetic recording medium is at least about 4,000 Oe.

    摘要翻译： 制造垂直磁记录介质的方法包括以下步骤：（a）提供具有低至约95℃的软化和玻璃化转变温度的无定型热塑性聚合物材料的基底; 和（b）在所述衬底的至少一个表面上方形成至少一层薄膜层，所述至少一层堆叠包括至少一个垂直型粒状磁记录层，其中氧化物和/或氮化物提供物理去除层， 相邻磁性颗粒的耦合; 并且其中每个薄膜层通过在不大于约70℃的衬底温度下沉积而形成，并且所得到的垂直磁记录介质的矫顽力（H C）至少约为 4000盎司

    Loran-C alignment method
    3.
    发明授权
    Loran-C alignment method 失效
    罗兰C对齐方法

    公开(公告)号：US5105196A

    公开(公告)日：1992-04-14

    申请号：US659226

    申请日：1991-02-22

    申请人： Thomas P. Nolan ,  Charles B. Branch

    发明人： Thomas P. Nolan ,  Charles B. Branch

    IPC分类号： G01S1/02 ,  G01S1/24 ,  G01S19/48

    CPC分类号： G01S1/245 ,  G01S1/026

    摘要： An alignment procedure to insure the proper and faithful reproduction of the automatic control loop SERial DAta (SERDA) instructions issued by the Pulse Amplitude and Timing COntrol Unit (PATCO). This reproduction takes place during high level, multipulsed, radio frequency energy transfer to the antenna system. The precise reproduction of the low level digital pulse shape and timing instructions will insure that the transmitter set is operating within the constraints of the International Telecommunications Union for radio transmissions and the specifications which govern the original design during "automatic operation" at a specified Envelope to Cycle Difference (ECD). The alignment procedure once accomplished allows for a simplified monitoring technique, to insure continued proper operation. This monitoring and correction routine can be accomplished using personnel of less technical expertise and test equipments of less complexity and cost.

    摘要翻译： 确保正确和忠实地再现由脉冲幅度和定时控制单元（PATCO）发出的自动控制回路SERAL DATA（SERDA）指令的校准程序。 这种再现在高电平，多脉冲，射频能量传输到天线系统期间发生。 低电平数字脉冲形状和定时指令的精确再现将确保发射机组在国际电信联盟的无线电传输的限制内运行，以及在指定的信封的“自动操作”期间控制原始设计的规范， 周期差（ECD）。 完成的对准过程允许简化的监控技术，以确保持续正常操作。 该监测和校正程序可以使用较少技术专长的人员和复杂性和成本较低的测试设备来实现。

    Perpendicular magnetic recording media with improved crystallographic orientations and method of manufacturing same
    6.
    发明授权
    Perpendicular magnetic recording media with improved crystallographic orientations and method of manufacturing same 有权
    具有改善晶体取向的垂直磁记录介质及其制造方法

    公开(公告)号：US07175925B2

    公开(公告)日：2007-02-13

    申请号：US10663670

    申请日：2003-09-17

    申请人： Qixu David Chen ,  Thomas P. Nolan ,  Zhong Stella Wu ,  Samuel Dacke Harkness, IV ,  Rajiv Yadav Ranjan

    发明人： Qixu David Chen ,  Thomas P. Nolan ,  Zhong Stella Wu ,  Samuel Dacke Harkness, IV ,  Rajiv Yadav Ranjan

    IPC分类号： G11B5/66 ,  G11B5/70

    CPC分类号： G11B5/732 ,  G11B5/667 ,  G11B2005/0029

    摘要： A perpendicular magnetic recording medium, comprising: (a) a non-magnetic substrate having a surface; and (b) a layer stack formed over the substrate surface, comprising in overlying sequence from the substrate surface: (i) a magnetically soft underlayer; (ii) an interlayer structure for crystallographically orienting a layer of a perpendicular magnetic recording material formed thereon; and (iii) at least one crystallographically oriented magnetically hard perpendicular recording layer; wherein the magnetically soft underlayer is sputter-deposited at a sufficiently large target-to-substrate spacing and at a sufficiently low gas pressure selected to provide the underlayer with a smooth surface having a low average surface roughness Ra below about 0.3 nm, as measured by Atomic Force Microscopy (AFM).

    摘要翻译： 一种垂直磁记录介质，包括：（a）具有表面的非磁性基板; 和（b）形成在所述衬底表面上的层叠层，包括从所述衬底表面的重叠顺序：（i）磁软底层; （ii）用于晶体取向形成在其上的垂直磁记录材料层的层间结构; 和（iii）至少一个晶体取向的磁性硬垂直记录层; 其中所述磁软底层被溅射沉积在足够大的靶对衬底间隔处并且以足够低的气体压力被选择以使底层具有平均表面，其具有低于约0.3nm的低平均表面粗糙度Ra，如通过 原子力显微镜（AFM）。

    PERPENDICULAR MAGNECTIC RECORDING MEDIA WITH IMPROVED FCC AU-CONTAINING INTERPLAYERS
    7.
    发明申请
    PERPENDICULAR MAGNECTIC RECORDING MEDIA WITH IMPROVED FCC AU-CONTAINING INTERPLAYERS 审中-公开
    具有改进的FCC所有接口的PERPENDICULAR MAGNECTIC RECORDING MEDIA

    公开(公告)号：US20090280357A1

    公开(公告)日：2009-11-12

    申请号：US12259813

    申请日：2008-10-28

    申请人： Erol GIRT ,  Thomas P. Nolan

    发明人： Erol GIRT ,  Thomas P. Nolan

    IPC分类号： G11B5/66

    CPC分类号： G11B5/667 ,  G11B5/653 ,  G11B5/656 ,  G11B5/66

    摘要： A perpendicular magnetic recording medium, comprising a non-magnetic interlayer structure selected from the group consisting of: (1) a structure comprising a layer of a fcc Au-containing non-magnetic material having a preferred growth orientation and a layer of a different material in overlying or underlying contact therewith; (2) a structure comprising, in overlying sequence, a layer of a fcc Au-containing non-magnetic material adjacent a magnetically soft underlayer and having a preferred growth orientation; and n layers of a different fcc non-magnetic material having a preferred growth orientation, where n=1−5; (3) a structure comprising, in overlying sequence, a layer of a fcc Au-containing non-magnetic material adjacent a magnetically soft underlayer and having a preferred growth orientation; and a layer of a hcp non-magnetic material having a preferred growth orientation; (4) a structure comprising, in overlying sequence, a layer of a fcc Au-containing non-magnetic material adjacent a magnetically soft underlayer and having a preferred growth orientation; n layers of a different fcc non-magnetic material having a preferred growth orientation, where n=1−5; and n layers of a hcp non-magnetic material having a preferred growth orientation, where n=1−5; and (5) an (fcc)1/(hcp)1/(fcc)2/(hcp)2 structure comprising, in overlying sequence, a first fcc layer (fcc)1, a first hcp layer (hcp)1, a second fcc layer (fcc)2, and a second hcp layer (hcp)2, wherein at least the first fcc layer is an Au-containing non-magnetic material.

    摘要翻译： 一种垂直磁记录介质，包括非磁性层间结构，其选自：（1）包含具有<111>优选生长方向的fcc含Au非磁性材料层的结构，以及 与其重叠或潜在接触的不同材料; （2）一种结构，其包括顺序地包含邻近磁软底层并且具有优选生长方向的fcc含Au非磁性材料层; 和n层具有<111>优选生长方向的不同fcc非磁性材料，其中n = 1-5; （3）以叠加顺序包含邻近磁软底层并且具有优选生长方向的fcc含Au非磁性材料层的结构; 以及具有优选生长方向的hcp非磁性材料层; （4）一种结构，其包括以下顺序：包含邻近磁软底层并具有优选生长方向的含Fe含量的非磁性材料层; n层具有<111>优选生长取向的不同fcc非磁性材料，其中n = 1-5; 和n层具有优选生长方向的hcp非磁性材料，其中n = 1-5; 和（5）一个（fcc）1 /（hcp）1 /（fcc）2 /（hcp）2结构，其包括第一fcc层（fcc）1，第一hcp层（hcp）1， 第二fcc层（fcc）2和第二hcp层（hcp）2，其中至少第一fcc层是含Au非磁性材料。

    Antiferromagnetic coupling layers
    8.
    发明授权
    Antiferromagnetic coupling layers 有权

    公开(公告)号：US09972352B2

    公开(公告)日：2018-05-15

    申请号：US12544091

    申请日：2009-08-19

    申请人： Thomas P. Nolan ,  Bogdan F. Valcu ,  Li Tang

    发明人： Thomas P. Nolan ,  Bogdan F. Valcu ,  Li Tang

    IPC分类号： G11B5/667 ,  G11B5/82

    CPC分类号： G11B5/82 ,  G11B5/667

    摘要： Methods and media structures are provided for increasing writability and reducing unintentional erasure of perpendicular magnetic recording media. Variable permeability is controlled within a thin soft underlayer (SUL) structure, independent of bulk SUL material properties such as magnetic moment (Bs) and magnetic anisotropy (Hk). Media with an improved combination of easier writability on the recorded track and difficult erasure off-track (between tracks and on neighboring tracks) is achieved, in part, by an unbalanced antiferromagnetically coupled (AFC) SUL structure. A permeability gradient is established within the soft underlayer with layers having different values of permeability and magnetic thickness (Bs*t). In an aspect, a first SUL layer includes a high permeability region and an overlying low permeability region. A second layer antiferromagnetically couples the first layer to a low permeability third SUL layer. The present invention may be utilized with high density perpendicular recording media requiring carefully balanced magnetic properties.

    Magnetic Recording Media with Reliable Writability and Erasure
    9.
    发明申请
    Magnetic Recording Media with Reliable Writability and Erasure 有权
    磁记录介质具有可靠的可写和擦除功能

    公开(公告)号：US20110043939A1

    公开(公告)日：2011-02-24

    申请号：US12544091

    申请日：2009-08-19

    申请人： Thomas P. Nolan ,  Bogdan F. Valcu ,  Li Tang

    发明人： Thomas P. Nolan ,  Bogdan F. Valcu ,  Li Tang

    IPC分类号： G11B5/82 ,  G11B5/02

    CPC分类号： G11B5/82 ,  G11B5/667

    摘要： Methods and media structures are provided for increasing writability and reducing unintentional erasure of perpendicular magnetic recording media. Variable permeability is controlled within a thin soft underlayer (SUL) structure, independent of bulk SUL material properties such as magnetic moment (Bs) and magnetic anisotropy (Hk). Media with an improved combination of easier writability on the recorded track and difficult erasure off-track (between tracks and on neighboring tracks) is achieved, in part, by an unbalanced antiferromagnetically coupled (AFC) SUL structure. A permeability gradient is established within the soft underlayer with layers having different values of permeability and magnetic thickness (Bs*t). In an aspect, a first SUL layer includes a high permeability region and an overlying low permeability region. A second layer antiferromagnetically couples the first layer to a low permeability third SUL layer. The present invention may be utilized with high density perpendicular recording media requiring carefully balanced magnetic properties.

    摘要翻译： 提供了方法和介质结构，以提高可写性并减少垂直磁记录介质的无意擦除。 可变磁导率控制在薄的软底层（SUL）结构内，与体积SUL材料性质如磁矩（Bs）和磁各向异性（Hk）无关。 通过不平衡的反铁磁耦合（AFC）SUL结构实现了具有改善的在记录轨道上易于写入的组合和难以擦除离轨（在轨道和相邻轨道之间）的介质。 在软底层内形成渗透率梯度，其层具有不同的磁导率和磁厚度值（Bs * t）。 一方面，第一SUL层包括高磁导率区域和上覆的低磁导率区域。 第二层将第一层反铁磁耦合到低渗透性第三SUL层。 本发明可以用于需要仔细平衡的磁性能的高密度垂直记录介质。