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    Winged pole and shield structure for reducing stray field in a perpendicular write head
    2.
    发明授权
    Winged pole and shield structure for reducing stray field in a perpendicular write head 失效
    翼极和屏蔽结构，用于减少垂直写头中的杂散场

    公开(公告)号：US07508628B2

    公开(公告)日：2009-03-24

    申请号：US10976478

    申请日：2004-10-29

    申请人： Xiaodong Che ,  Hardayal Singh Gill ,  Wen-chien Hsiao ,  Yangsheng Luo ,  Xiaoyu Sui

    发明人： Xiaodong Che ,  Hardayal Singh Gill ,  Wen-chien Hsiao ,  Yangsheng Luo ,  Xiaoyu Sui

    IPC分类号： G11B5/33 ,  G11B5/127

    CPC分类号： G11B5/3116 ,  G11B5/11 ,  G11B5/1278 ,  G11B5/3146 ,  G11B5/315

    摘要： A magnetic structure for use in a magnetic recording head, the structure having improved resistance to stray field writing. The magnetic structure can be for example a magnetic shield or a return pole of a perpendicular write element. The structure includes a main body portion which may have a generally rectangular configuration, and first and second wing portions extending laterally from the sides of the body at or near the ABS. The wing portions have a depth measured perpendicular to the ABS that is significantly less than the depth of the body portion (preferably less than 25 percent of the body portion). The wing portions may also have notches formed in their ABS edges. The wings conduct flux from the ABS edge of the body portion and create a flux choking effect for magnetic flux flowing into the wings.

    摘要翻译： 一种用于磁记录头的磁结构，该结构具有改进的对杂散场写入的抵抗能力。 磁性结构可以是例如垂直写入元件的磁屏蔽或返回极。 该结构包括主体部分，该主体部分可以具有大致矩形的构造，第一和第二翼部分在ABS身体处或ABS附近从主体的侧面横向延伸。 翼部具有垂直于ABS测量的深度，该深度明显小于主体部分的深度（优选小于主体部分的25％）。 翼部也可以在其ABS边缘中形成切口。 机翼从主体部分的ABS边缘引导通量，并产生流入机翼的磁通量的通量阻塞效应。

    Magnetic reader recording characterization at slider or bar level
    3.
    发明授权
    Magnetic reader recording characterization at slider or bar level 失效
    磁性阅读器记录滑块或条形图表示

    公开(公告)号：US07365531B2

    公开(公告)日：2008-04-29

    申请号：US11004456

    申请日：2004-12-03

    申请人： Xiaodong Che ,  Wenchien David Hsiao ,  Yansheng Luo ,  Xiaoyu Sui

    发明人： Xiaodong Che ,  Wenchien David Hsiao ,  Yansheng Luo ,  Xiaoyu Sui

    IPC分类号： G01R33/12

    CPC分类号： G11B27/36 ,  G11B5/455 ,  G11B2220/2516

    摘要： An apparatus for reader characterization is described. The apparatus includes a rotator for rotating a media. The media can contain a signal having a value for a function of a read/write head being assessed. The rotator is operable in conjunction with said apparatus. The apparatus also includes a proximator for proximalizing the media to the read/write head. The proximator is operable in conjunction with said apparatus. The apparatus further includes a writer operable in conjunction with said assembly. The writer writes the signal upon the media. The signal emits the value of the function. The signal is detectable by a reader of the read/write head. The apparatus additionally includes an interface operable in the apparatus for providing removable orientation of the read/write head in an assessing position. The assessing position enables a reader of the read/write head to detect the signal upon rotation of the signal through the assessing position.

    摘要翻译： 描述用于读取器表征的装置。 该装置包括用于旋转介质的旋转器。 媒体可以包含具有被评估的读/写头的功能的值的信号。 旋转器可与所述装置结合操作。 该装置还包括用于将介质近端连接到读/写头的近摄器。 接近器可与所述装置结合操作。 该装置还包括可与所述组件结合操作的写入器。 作者将信号写入媒体。 该信号发出该功能的值。 信号可由读/写头的读取器检测。 该装置还包括可在该装置中操作的接口，用于在评估位置提供读/写头的可移除取向。 评估位置使得读/写头的读取器能够在通过评估位置旋转信号时检测信号。

    System, method, and apparatus for in-situ stray magnetic field measurement
    4.
    发明授权
    System, method, and apparatus for in-situ stray magnetic field measurement 失效
    用于原位杂散磁场测量的系统，方法和装置

    公开(公告)号：US07227711B2

    公开(公告)日：2007-06-05

    申请号：US10977678

    申请日：2004-10-29

    申请人： Xiaodong Che ,  Wen-Chien David Hsiao ,  Yansheng Luo ,  Xiaoyu Sui

    发明人： Xiaodong Che ,  Wen-Chien David Hsiao ,  Yansheng Luo ,  Xiaoyu Sui

    IPC分类号： G11B19/04

    CPC分类号： G11B25/043 ,  G11B33/1493

    摘要： A hard disk drive (HDD) detects and measures external stray magnetic fields with existing HDD components. After detecting a strong external magnetic field, read and write operations of the HDD are suspended, and/or other proper corrective actions are taken to minimize loss of data. To measure the stray magnetic field, the magnetic head reader is used as a field sensor. The resistance of the reader changes in the presence of the field, such as with the preamp in the HDD. The resistance also changes with temperature. If the temperature inside the HDD is measured, the resistance change due to temperature is normalized. Even without being able to measure the HDD temperature, the stray magnetic field can be measured with a top head and a bottom head in the HDD. The temperature sensitivity of the reader is thereby cancelled out.

    摘要翻译： 硬盘驱动器（HDD）用现有的HDD组件来检测和测量外部杂散磁场。 在检测到强大的外部磁场之后，HDD的读取和写入操作被暂停，和/或采取其他适当的纠正措施以最小化数据丢失。 为了测量杂散磁场，磁头阅读器被用作场传感器。 读取器的电阻会在场的存在情况下发生变化，例如使用HDD中的前置放大器。 电阻也随温度而变化。 如果测量HDD内部的温度，则由于温度导致的电阻变化被归一化。 即使不能测量HDD温度，也可以用HDD中的顶部头部和底部头部来测量杂散磁场。 因此读取器的温度敏感度被抵消。

    METHOD AND APPARATUS FOR OPTIMIZING RECORD QUALITY WITH VARYING TRACK AND LINEAR DENSITY BY ALLOWING OVERLAPPING DATA TRACKS
    5.
    发明申请
    METHOD AND APPARATUS FOR OPTIMIZING RECORD QUALITY WITH VARYING TRACK AND LINEAR DENSITY BY ALLOWING OVERLAPPING DATA TRACKS 有权
    通过允许重写数据轨迹优化记录质量与改变轨迹和线性密度的方法和装置

    公开(公告)号：US20060227449A1

    公开(公告)日：2006-10-12

    申请号：US11104209

    申请日：2005-04-11

    申请人： Xiaodong Che ,  Wen-Chien Hsiao ,  Yansheng Luo ,  Xiaoyu Sui ,  Samuel Yuan

    发明人： Xiaodong Che ,  Wen-Chien Hsiao ,  Yansheng Luo ,  Xiaoyu Sui ,  Samuel Yuan

    IPC分类号： G11B21/02

    CPC分类号： G11B5/59633 ,  G11B5/012 ,  G11B2005/001

    摘要： A method and apparatus for optimizing data record quality on a disk for a pair of read and write heads, in which the write head is bigger, by adaptively varying linear and track density of overlapping recorded tracks to achieve a target storage capacity. In the method, target storage capacity and radial writing direction are selected. Read and write widths of heads are determined. A linear density and offset distance pairing for optimizing record quality at target storage capacity is determined, wherein offset distance is less than write width but greater than read width. The write head writes a track at the linear density, is offset in the radial direction by the offset distance, and the offset distance is stored. The write head writes a new track at the linear density. Offsetting, storing offset, and writing a new track are repeated until desired data is written into a cluster.

    摘要翻译： 一种用于通过自适应地改变重叠记录轨道的线性和轨道密度以实现目标存储容量来优化写头的一对读写头的盘上的数据记录质量的方法和装置。 在该方法中，选择目标存储容量和径向写入方向。 磁头读写宽度确定。 确定用于优化目标存储容量的记录质量的线性密度和偏移距离配对，其中偏移距离小于写入宽度但大于读取宽度。 写入头以线性密度写入轨迹，在径向上偏移偏移距离，并存储偏移距离。 写头以线性密度写入新的轨迹。 重复偏移，存储偏移和写入新轨道，直到所需数据写入群集。

    Magnetic reader recording characterization at slider or bar level
    8.
    发明申请
    Magnetic reader recording characterization at slider or bar level 失效
    磁性阅读器记录滑块或条形图表示

    公开(公告)号：US20060119354A1

    公开(公告)日：2006-06-08

    申请号：US11004456

    申请日：2004-12-03

    申请人： Xiaodong Che ,  Wenchien Hsiao ,  Yansheng Luo ,  Xiaoyu Sui

    发明人： Xiaodong Che ,  Wenchien Hsiao ,  Yansheng Luo ,  Xiaoyu Sui

    IPC分类号： G11B27/36

    CPC分类号： G11B27/36 ,  G11B5/455 ,  G11B2220/2516

    摘要： An apparatus for reader characterization is described. The apparatus includes a rotator for rotating a media. The media can contain a signal having a value for a function of a read/write head being assessed. The rotator is operable in conjunction with said apparatus. The apparatus also includes a proximator for proximalizing the media to the read/write head. The proximator is operable in conjunction with said apparatus. The apparatus further includes a writer operable in conjunction with said assembly. The writer writes the signal upon the media. The signal emits the value of the function. The signal is detectable by a reader of the read/write head. The apparatus additionally includes an interface operable in the apparatus for providing removable orientation of the read/write head in an assessing position. The assessing position enables a reader of the read/write head to detect the signal upon rotation of the signal through the assessing position.

    摘要翻译： 描述用于读取器表征的装置。 该装置包括用于旋转介质的旋转器。 媒体可以包含具有被评估的读/写头的功能的值的信号。 旋转器可与所述装置结合操作。 该装置还包括用于将介质近端连接到读/写头的近摄器。 接近器可与所述装置结合操作。 该装置还包括可与所述组件结合操作的写入器。 作者将信号写入媒体。 该信号发出该功能的值。 信号可由读/写头的读取器检测。 该装置还包括可在该装置中操作的接口，用于在评估位置提供读/写头的可移除取向。 评估位置使得读/写头的读取器能够在通过评估位置旋转信号时检测信号。

    System, method, and apparatus for in-situ stray magnetic field measurement
    9.
    发明申请
    System, method, and apparatus for in-situ stray magnetic field measurement 失效
    用于原位杂散磁场测量的系统，方法和装置

    公开(公告)号：US20060092543A1

    公开(公告)日：2006-05-04

    申请号：US10977678

    申请日：2004-10-29

    申请人： Xiaodong Che ,  Wen-Chien Hsiao ,  Yansheng Luo ,  Xiaoyu Sui

    发明人： Xiaodong Che ,  Wen-Chien Hsiao ,  Yansheng Luo ,  Xiaoyu Sui

    IPC分类号： G11B15/04

    CPC分类号： G11B25/043 ,  G11B33/1493

    摘要： A hard disk drive (HDD) detects and measures external stray magnetic fields with existing HDD components. After detecting a strong external magnetic field, read and write operations of the HDD are suspended, and/or other proper corrective actions are taken to minimize loss of data. To measure the stray magnetic field, the magnetic head reader is used as a field sensor. The resistance of the reader changes in the presence of the field, such as with the preamp in the HDD. The resistance also changes with temperature. If the temperature inside the HDD is measured, the resistance change due to temperature is normalized. Even without being able to measure the HDD temperature, the stray magnetic field can be measured with a top head and a bottom head in the HDD. The temperature sensitivity of the reader is thereby cancelled out.

    摘要翻译： 硬盘驱动器（HDD）用现有的HDD组件来检测和测量外部杂散磁场。 在检测到强大的外部磁场之后，HDD的读取和写入操作被暂停，和/或采取其他适当的纠正措施以最小化数据丢失。 为了测量杂散磁场，磁头阅读器被用作场传感器。 读取器的电阻会在场的存在情况下发生变化，例如使用HDD中的前置放大器。 电阻也随温度而变化。 如果测量HDD内部的温度，则由于温度导致的电阻变化被归一化。 即使不能测量HDD温度，也可以用HDD中的顶部头部和底部头部来测量杂散磁场。 因此读取器的温度敏感度被抵消。