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    Method for characterizing a magnetic-recording system for the presence of adjacent-track interference and far-track interference
    1.
    发明授权
    Method for characterizing a magnetic-recording system for the presence of adjacent-track interference and far-track interference 有权
    用于表征存在相邻磁道干扰和远磁道干扰的磁记录系统的方法

    公开(公告)号：US08120866B2

    公开(公告)日：2012-02-21

    申请号：US12511702

    申请日：2009-07-29

    申请人： Xiaodong Che ,  Zhen Jin ,  Michael Salo ,  Roger Wood

    发明人： Xiaodong Che ,  Zhen Jin ,  Michael Salo ,  Roger Wood

    IPC分类号： G11B27/36 ,  G11B5/03

    CPC分类号： G11B5/59627 ,  G11B5/09

    摘要： A method for characterizing a magnetic-recording system for the presence of adjacent-track interference and far-track interference. The method includes writing a plurality of repeating pulse-waveforms on a data track of a magnetic-recording disk at a write element of a magnetic-recording head. The method further includes reading a plurality of read-back signals from the magnetic-recording disk over a band of pseudo-data tracks offset from the data track by corresponding pseudo-data-track offsets in a radial direction of the magnetic-recording disk at a read element of the magnetic-recording head. In addition, the method includes displaying a magnetic-recording-signature map synthesized from the read-back signals from the magnetic-recording disk.

    摘要翻译： 用于表征磁记录系统的方法，用于存在相邻磁道干扰和远磁道干扰。 该方法包括在磁记录头的写入元件的磁记录盘的数据轨道上写入多个重复的脉冲波形。 该方法还包括：在磁​​记录盘的数据轨道偏移的伪数据轨道的带上，通过磁记录盘的径向方向上的对应的伪数据轨偏移来读取多个读回信号， 磁记录头的读取元件。 此外，该方法包括显示从磁记录盘的回读信号合成的磁记录签名图。

    METHOD FOR CHARACTERIZING A MAGNETIC-RECORDING SYSTEM FOR THE PRESENCE OF ADJACENT-TRACK INTERFERENCE AND FAR-TRACK INTERFERENCE
    2.
    发明申请
    METHOD FOR CHARACTERIZING A MAGNETIC-RECORDING SYSTEM FOR THE PRESENCE OF ADJACENT-TRACK INTERFERENCE AND FAR-TRACK INTERFERENCE 有权
    用于表征相干跟踪干扰和光纤干扰的磁记录系统的方法

    公开(公告)号：US20110026154A1

    公开(公告)日：2011-02-03

    申请号：US12511702

    申请日：2009-07-29

    申请人： Xiaodong Che ,  Zhen Jin ,  Michael Salo ,  Roger Wood

    发明人： Xiaodong Che ,  Zhen Jin ,  Michael Salo ,  Roger Wood

    IPC分类号： G11B27/36 ,  G11B5/03

    CPC分类号： G11B5/59627 ,  G11B5/09

    摘要： A method for characterizing a magnetic-recording system for the presence of adjacent-track interference and far-track interference. The method includes writing a plurality of repeating pulse-waveforms on a data track of a magnetic-recording disk at a write element of a magnetic-recording head. The method further includes reading a plurality of read-back signals from the magnetic-recording disk over a band of pseudo-data tracks offset from the data track by corresponding pseudo-data-track offsets in a radial direction of the magnetic-recording disk at a read element of the magnetic-recording head. In addition, the method includes displaying a magnetic-recording-signature map synthesized from the read-back signals from the magnetic-recording disk.

    摘要翻译： 用于表征磁记录系统的方法，用于存在相邻磁道干扰和远磁道干扰。 该方法包括在磁记录头的写入元件的磁记录盘的数据轨道上写入多个重复的脉冲波形。 该方法还包括：在磁​​记录盘的数据轨道偏移的伪数据轨道的带上，通过磁记录盘的径向方向上的对应的伪数据轨偏移来读取多个读回信号， 磁记录头的读取元件。 此外，该方法包括显示从磁记录盘的回读信号合成的磁记录签名图。

    SYNCHRONIZED REWRITING OF DATA
    3.
    发明申请
    SYNCHRONIZED REWRITING OF DATA 有权
    数据同步化

    公开(公告)号：US20110128646A1

    公开(公告)日：2011-06-02

    申请号：US12629437

    申请日：2009-12-02

    申请人： Michael Alex ,  Xiaodong Che ,  Zhen Jin ,  Michael Paul Salo

    发明人： Michael Alex ,  Xiaodong Che ,  Zhen Jin ,  Michael Paul Salo

    IPC分类号： G11B21/02

    CPC分类号： G11B19/041 ,  G11B5/02 ,  G11B20/10009 ,  G11B20/10398 ,  G11B2005/001 ,  G11B2020/10898 ,  G11B2220/2516

    摘要： A hard disk drive (HDD) including a magnetic disk, the magnetic disk including a data track. The HDD also includes a synchronized rewrite controller for synchronizing a plurality of rewrites of a data pattern on a location of the track of the magnetic disk and the HDD includes a write head controlled by the synchronized rewrite controller for writing the data pattern on the location of the data track and rewriting the data pattern a plurality of times on the location in synchronization with a prior writing of the data pattern on the data track.

    摘要翻译： 包括磁盘的硬盘驱动器（HDD），磁盘包括数据磁道。 HDD还包括同步重写控制器，用于在磁盘的轨道的位置上同步数据模式的多个重写，并且HDD包括由同步重写控制器控制的写入头，用于将数据模式写入到 数据跟踪数据跟踪并重写数据模式多次在位置上与数据轨迹上的数据模式的先前写入同步。

    Perpendicular magnetic write head having a trailing wrap-around magnetic shield magnetically biased in a cross track direction
    4.
    发明授权
    Perpendicular magnetic write head having a trailing wrap-around magnetic shield magnetically biased in a cross track direction 有权
    垂直磁性写头，其具有沿横向方向磁偏置的尾部缠绕磁屏蔽

    公开(公告)号：US08537496B2

    公开(公告)日：2013-09-17

    申请号：US12844736

    申请日：2010-07-27

    申请人： Zhihao Li ,  Xiaodong Che ,  Zhen Jin ,  Yansheng Luo

    发明人： Zhihao Li ,  Xiaodong Che ,  Zhen Jin ,  Yansheng Luo

    IPC分类号： G11B5/11

    CPC分类号： G11B5/1278 ,  G11B5/3116 ,  G11B5/315

    摘要： A perpendicular magnetic write head having improved Bit Error Rate (BER), Adjacent Track Interference (ATI) and Far Track Interference (FTI). The write head includes a write pole and a trailing wrap-around magnetic shield. A permanent magnetic is located at either outer side of the shield. These magnets are magnetized to have magnetizations that are oriented in the same direction, in a direction that is perpendicular to the track direction and parallel with the air bearing surface.

    摘要翻译： 具有改进的误码率（BER），相邻轨道干扰（ATI）和远距离干扰（FTI））的垂直磁性写入头。 写头包括一个写入磁极和一个后围环绕磁屏蔽。 永久磁铁位于屏蔽​​的外侧。 这些磁体被磁化以具有在垂直于轨道方向并平行于空气轴承表面的方向上沿相同方向定向的磁化。

    PERPENDICULAR MAGNETIC WRITE HEAD HAVING A TRAILING WRAP-AROUND MAGNETIC SHIELD MAGNETICALLY BIASED IN A CROSS TRACK DIRECTION
    5.
    发明申请
    PERPENDICULAR MAGNETIC WRITE HEAD HAVING A TRAILING WRAP-AROUND MAGNETIC SHIELD MAGNETICALLY BIASED IN A CROSS TRACK DIRECTION 有权
    具有缠绕缠绕磁性屏蔽的磁性写字母磁头在交叉轨迹方向上偏移

    公开(公告)号：US20120026628A1

    公开(公告)日：2012-02-02

    申请号：US12844736

    申请日：2010-07-27

    申请人： Zhihao Li ,  Xiaodong Che ,  Zhen Jin ,  Yansheng Luo

    发明人： Zhihao Li ,  Xiaodong Che ,  Zhen Jin ,  Yansheng Luo

    IPC分类号： G11B5/17 ,  G11B5/48

    CPC分类号： G11B5/1278 ,  G11B5/3116 ,  G11B5/315

    摘要： A perpendicular magnetic write head having improved Bit Error Rate (BER), Adjacent Track Interference (ATI) and Far Track Interference (FTI). The write head includes a write pole and a trailing wrap-around magnetic shield. A permanent magnetic is located at either outer side of the shield. These magnets are magnetized to have magnetizations that are oriented in the same direction, in a direction that is perpendicular to the track direction and parallel with the air bearing surface.

    摘要翻译： 具有改进的误码率（BER），相邻轨道干扰（ATI）和远距离干扰（FTI））的垂直磁性写入头。 写头包括一个写入磁极和一个后围环绕磁屏蔽。 永久磁铁位于屏蔽​​的外侧。 这些磁体被磁化以具有在垂直于轨道方向并平行于空气轴承表面的方向上沿相同方向定向的磁化。

    Synchronized rewriting of data
    6.
    发明授权
    Synchronized rewriting of data 有权
    同步重写数据

    公开(公告)号：US08116021B2

    公开(公告)日：2012-02-14

    申请号：US12629437

    申请日：2009-12-02

    申请人： Michael Alex ,  Xiaodong Che ,  Zhen Jin ,  Michael Paul Salo

    发明人： Michael Alex ,  Xiaodong Che ,  Zhen Jin ,  Michael Paul Salo

    IPC分类号： G11B27/36

    CPC分类号： G11B19/041 ,  G11B5/02 ,  G11B20/10009 ,  G11B20/10398 ,  G11B2005/001 ,  G11B2020/10898 ,  G11B2220/2516

    摘要： A hard disk drive (HDD) including a magnetic disk, the magnetic disk including a data track. The HDD also includes a synchronized rewrite controller for synchronizing a plurality of rewrites of a data pattern on a location of the track of the magnetic disk and the HDD includes a write head controlled by the synchronized rewrite controller for writing the data pattern on the location of the data track and rewriting the data pattern a plurality of times on the location in synchronization with a prior writing of the data pattern on the data track.

    摘要翻译： 包括磁盘的硬盘驱动器（HDD），磁盘包括数据磁道。 HDD还包括同步重写控制器，用于在磁盘的轨道的位置上同步数据模式的多个重写，并且HDD包括由同步重写控制器控制的写入头，用于将数据模式写入到 数据跟踪数据跟踪并重写数据模式多次在位置上与数据轨迹上的数据模式的先前写入同步。

    MULTI-PARAMETER OPTIMIZATION OF WRITE HEAD PERFORMANCE USING ADAPTIVE RESPONSE SURFACE
    7.
    发明申请
    MULTI-PARAMETER OPTIMIZATION OF WRITE HEAD PERFORMANCE USING ADAPTIVE RESPONSE SURFACE 审中-公开
    使用自适应响应表面的写入头部性能的多参数优化

    公开(公告)号：US20100134911A1

    公开(公告)日：2010-06-03

    申请号：US12326679

    申请日：2008-12-02

    申请人： Zhen Jin ,  Kezhao Zhang

    发明人： Zhen Jin ,  Kezhao Zhang

    IPC分类号： G11B27/36

    CPC分类号： G11B5/1278 ,  G11B5/455 ,  G11B20/10481 ,  G11B20/1816 ,  G11B2220/2516

    摘要： A method for optimizing design parameters of a magnetic write head. The method involves compiling a table of data points for a plurality of design parameters. An experimentally derived optimal design point is determined a first set of tests are performed at this experimentally determined design point. A three dimensional response surface is generated based on the testing. Then, a projected optimal design point is determined from the three dimensional response surface. Another test is performed using this projected optimal design point, and a convergence is determined by comparing the results of the first and second tests. If the convergence is within a predetermined value, then the process is complete. If the convergence is not within the predetermined value, then the process is repeated using the most recent projected optimal design point.

    摘要翻译： 一种优化磁写头设计参数的方法。 该方法包括编译多个设计参数的数据点表。 确定实验得出的最佳设计点，在该实验确定的设计点执行第一组测试。 基于测试生成三维响应面。 然后，从三维响应面确定预测的最佳设计点。 使用该预测的最佳设计点进行另一个测试，并且通过比较第一和第二测试的结果来确定收敛。 如果收敛在预定值内，则该过程完成。 如果收敛不在预定值内，则使用最近预测的最佳设计点重复该过程。

    Correcting errors in position of an HDD write-head
    9.
    发明授权
    Correcting errors in position of an HDD write-head 有权
    纠正HDD写入头位置的错误

    公开(公告)号：US08094403B2

    公开(公告)日：2012-01-10

    申请号：US12435220

    申请日：2009-05-04

    申请人： Roger William Wood ,  James Terrence Olson ,  Zhen Jin ,  Michael Paul Salo

    发明人： Roger William Wood ,  James Terrence Olson ,  Zhen Jin ,  Michael Paul Salo

    IPC分类号： G11B21/02

    CPC分类号： G11B5/012 ,  G11B5/5552 ,  G11B5/6005 ,  G11B5/6064 ,  G11B2005/001 ,  G11B2005/0021

    摘要： A hard-disk drive (HDD) with a current adjustment component is provided. The current adjustment component changes an amount of current to a magnetic-recording head of the HDD to cause a change in the strength of a magnetic write field produced by the magnetic-recording head in response to a determination that a present position of the magnetic-head head is not in a desired position. To illustrate, in response to a determination that the present position of the magnetic-recording head is further away from an edge of a current track being written than a desired position of the magnetic-recording head, the current adjustment component increases the current to the magnetic-recording head to cause an increase in the strength of the magnetic write field. The change in the strength of the magnetic write field causes data, written by the magnetic-recording head, to be located at a desired location on the magnetic-recording disk.

    摘要翻译： 提供带有电流调节组件的硬盘驱动器（HDD）。 电流调节部件将电流量改变到HDD的磁记录头，以响应于确定磁记录头的当前位置而导致磁记录头产生的磁写入场强度的变化， 头部头部不在期望的位置。 为了说明，响应于确定磁记录头的当前位置比正在写入的当前轨道的边缘比磁记录头的期望位置更远，则电流调节组件将电流增加到 磁记录头导致磁写字段的强度增加。 磁性写入场强度的变化导致由磁记录头写入的数据位于磁记录盘上的所需位置。