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    • 16. 发明授权
    • Magnetic writer having multiple gaps with more uniform magnetic fields across the gaps
    • 具有多个间隙的磁记录器,跨越间隙具有更均匀的磁场
    • US08385018B2
    • 2013-02-26
    • US12611294
    • 2009-11-03
    • Robert G. BiskebornPhilipp HergetBucknell C. Webb
    • Robert G. BiskebornPhilipp HergetBucknell C. Webb
    • G11B5/265
    • G11B5/3116G11B5/17G11B5/23G11B5/265G11B5/2652G11B5/59638
    • A magnetic device according to one embodiment includes a source of flux; a magnetic pole coupled to the source of flux, the magnetic pole having two or more gaps; and a low reluctance path positioned towards at least one of the gaps and not positioned towards at least one other of the gaps for affecting a magnetic field formed at the at least one of the gaps when the source of flux is generating flux. Other disclosed embodiments include devices having coil turns with a non-uniform placement in the magnetic yoke for altering a magnetic field formed at the at least one of the gaps during writing. In further embodiments, a geometry of the magnetic pole near or at one of the gaps is different than a geometry of the magnetic pole near or at another of the gaps to help equalize fields formed at the gaps when the source of flux is generating flux.
    • 根据一个实施例的磁性装置包括通量源; 耦合到磁通源的磁极,所述磁极具有两个或更多个间隙; 以及朝向所述间隙中的至少一个定位的低磁阻路径,并且朝向所述间隙中的至少另一个定位,以在所述通量源产生磁通时影响形成在所述至少一个间隙处的磁场。 其他公开的实施例包括具有在磁轭中具有不均匀布置的线圈匝的装置,用于在写入期间改变在至少一个间隙处形成的磁场。 在另外的实施例中,靠近或在其中一个间隙处的磁极的几何形状不同于磁极在靠近或另一个间隙处的几何形状,以帮助当磁通源产生磁通时在间隙处形成的场均衡。
    • 19. 发明授权
    • Self-servo-writing multi-slot timing pattern
    • 自伺服写多槽定时模式
    • US07268963B2
    • 2007-09-11
    • US10903153
    • 2004-07-30
    • Timothy J. ChainerMark D. SchultzBucknell C. Webb
    • Timothy J. ChainerMark D. SchultzBucknell C. Webb
    • G11B5/09G11B21/02G11B5/596
    • G11B5/59633G11B5/59605
    • Self-servo-writing of multi-slot timing patterns is described. Individual timing marks are replaced with groups of timing mark slots. At each timing mark location, a time measurement is made by detecting a timing mark in one of the slots. Also, extensions to the existing timing marks are written in other slots. The combination of timing measurements at every timing mark and extensions to those timing marks written at every opportunity improves the overall precision of the timing propagation. The improved accuracy of timing mark placement produces a commensurate improvement in the placement of the concomitantly written servo-data. In addition, the alignment accuracy of the written pattern is less sensitive to variations in rotation speed and variations in the shape of written transitions. Moreover, only a single disk revolution is required at each servo radius to write servo data and propagate the timing marks to maintain timing alignment.
    • 描述了多时隙定时模式的自伺服写入。 单个定时标记被定时标记位置组替换。 在每个定时标记位置,通过检测其中一个时隙中的定时标记来进行时间测量。 此外,现有时序标记的扩展也写在其他插槽中。 每个定时标记的定时测量和在每个机会上写入的定时标记的扩展的组合可以提高定时传播的总体精度。 定时标记放置的改进精度在同时写入的伺服数据的位置上产生相应的改进。 此外,写入的图案的对准精度对旋转速度的变化和写入的转变的形状的变化较不敏感。 此外,在每个伺服半径处仅需要一次盘旋转以写入伺服数据并传播定时标记以保持定时对准。