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    Perpendicular magnetic write head having a novel trailing return pole for reduced wide-area-track-erasure
    4.
    发明授权
    Perpendicular magnetic write head having a novel trailing return pole for reduced wide-area-track-erasure 有权
    垂直磁头写入头具有一个新颖的拖尾返回极，用于缩小广域轨迹擦除

    公开(公告)号：US08068311B2

    公开(公告)日：2011-11-29

    申请号：US12040717

    申请日：2008-02-29

    申请人： Wen-Chien David Hsiao ,  Yansheng Luo ,  Quan-chiu Harry Lam

    发明人： Wen-Chien David Hsiao ,  Yansheng Luo ,  Quan-chiu Harry Lam

    IPC分类号： G11B5/127

    CPC分类号： G11B5/3116 ,  G11B5/1278 ,  G11B5/312

    摘要： A magnetic write head having a magnetic return pole that is configured to prevent wide area track erasure. The magnetic return pole has a throat region with a relatively narrow width and has a inner and outer wing portions formed near the air bearing surface. The inner wing portion has a front edge that is disposed at the air bearing surface, whereas the outer wing portion has a front edge that is recessed from the air bearing surface.

    摘要翻译： 一种具有磁回归极的磁写头，其被配置为防止广泛的磁道擦除。 磁返回杆具有宽度相对较窄的喉部区域，并且在靠近空气支承表面处形成有内翼部分和外翼部分。 内翼部具有设置在空气支承面的前缘，而外翼部具有从空气轴承面凹入的前缘。

    WRITE HEAD WITH ROTATIONAL WRITE FIELD
    6.
    发明申请
    WRITE HEAD WITH ROTATIONAL WRITE FIELD 审中-公开
    具有旋转写字段的写头

    公开(公告)号：US20120162821A1

    公开(公告)日：2012-06-28

    申请号：US12979208

    申请日：2010-12-27

    申请人： Quan-Chiu Harry Lam ,  Donald G. Allen ,  Yansheng Luo

    发明人： Quan-Chiu Harry Lam ,  Donald G. Allen ,  Yansheng Luo

    IPC分类号： G11B5/127

    CPC分类号： G11B5/3116 ,  G11B5/1278

    摘要： The present disclosure describes various ways to achieve a rotational write field using a single coil. For example, a rotational write field can be achieved with a single coil by using different yoke lengths for different poles of a write element. Also described are ways to achieve a rotational write field with a single coil by varying the resistivity, saturation flux density, or pole width of the different poles of the write element of the present invention. The present disclosure also describes various ways to achieve a rotational write field using varied windings of a single coil.

    摘要翻译： 本公开描述了使用单个线圈来实现旋转写入场的各种方式。 例如，通过对写元件的不同极使用不同的轭长度，可以用单个线圈实现旋转写入场。 还描述了通过改变本发明的写入元件的不同极的电阻率，饱和磁通密度或极宽度来实现具有单个线圈的旋转写入场的方式。 本公开还描述了使用单个线圈的不同绕组实现旋转写入场的各种方式。

    MAGNETIC HEAD HAVING A STEPPED OR SEGMENTED WRAP AROUND SHIELD AND METHODS OF FORMATION THEREOF
    7.
    发明申请
    MAGNETIC HEAD HAVING A STEPPED OR SEGMENTED WRAP AROUND SHIELD AND METHODS OF FORMATION THEREOF 有权
    具有围绕镶嵌或镶嵌的磁带的磁头及其形成方法

    公开(公告)号：US20110019309A1

    公开(公告)日：2011-01-27

    申请号：US12508860

    申请日：2009-07-24

    申请人： Wen-Chien David Hsiao ,  Yansheng Luo

    发明人： Wen-Chien David Hsiao ,  Yansheng Luo

    IPC分类号： G11B5/187

    CPC分类号： G11B5/3116 ,  G11B5/1278 ,  G11B5/1871 ,  G11B5/3146 ,  G11B5/315 ,  G11B5/3163

    摘要： According to one embodiment, a system comprises a magnetic pole having a media-facing end and a wrap around shield spaced from the magnetic pole, wherein the wrap around shield has a media-facing end positioned along three sides of the media-facing end of the magnetic pole and has inner, second, and middle regions separated by transitional regions. The inner region is closest to the media facing end of the magnetic pole, the second region is farthest from the media facing end of the magnetic pole, and the middle region is between the inner and second regions. A cross-sectional height of the inner region measured perpendicularly to the wrap around shield's media-facing end is less than a cross-sectional height of the second region, and a cross-sectional height of the middle region is greater than the cross-sectional height of the inner region and less than the cross-sectional height of the second region.

    摘要翻译： 根据一个实施例，一种系统包括具有面向媒体的端部和围绕屏蔽物与磁极间隔开的磁极的磁极，其中环绕屏蔽件具有面向介质的端部，其位于面向介质的端部的面向介质的端部的三侧 磁极具有由过渡区域分隔的内部，第二和中部区域。 内部区域最靠近磁极的与介质相对的端部，第二区域距磁极的与介质相对的端部最远，并且中间区域在内部区域和第二区域之间。 内部区域的横截面高度垂直于围绕屏蔽物的面向介质的端部的横截面高度小于第二区域的横截面高度，并且中间区域的横截面高度大于横截面 内部区域的高度并且小于第二区域的横截面高度。

    Magnetic head having a stepped or segmented wrap around shield and methods of formation thereof
    8.
    发明授权
    Magnetic head having a stepped or segmented wrap around shield and methods of formation thereof 有权
    具有围绕屏蔽的台阶或分段包裹物的磁头及其形成方法

    公开(公告)号：US08089725B2

    公开(公告)日：2012-01-03

    申请号：US12508860

    申请日：2009-07-24

    申请人： Wen-Chien David Hsiao ,  Yansheng Luo

    发明人： Wen-Chien David Hsiao ,  Yansheng Luo

    IPC分类号： G11B5/127

    CPC分类号： G11B5/3116 ,  G11B5/1278 ,  G11B5/1871 ,  G11B5/3146 ,  G11B5/315 ,  G11B5/3163

    摘要： According to one embodiment, a system comprises a magnetic pole having a media-facing end and a wrap around shield spaced from the magnetic pole, wherein the wrap around shield has a media-facing end positioned along three sides of the media-facing end of the magnetic pole and has inner, second, and middle regions separated by transitional regions. The inner region is closest to the media facing end of the magnetic pole, the second region is farthest from the media facing end of the magnetic pole, and the middle region is between the inner and second regions. A cross-sectional height of the inner region measured perpendicularly to the wrap around shield's media-facing end is less than a cross-sectional height of the second region, and a cross-sectional height of the middle region is greater than the cross-sectional height of the inner region and less than the cross-sectional height of the second region.

    摘要翻译： 根据一个实施例，一种系统包括具有面向媒体的端部和围绕屏蔽物与磁极间隔开的磁极的磁极，其中环绕屏蔽件具有面向介质的端部，其位于面向介质的端部的面向介质的端部的三侧 磁极具有由过渡区域分隔的内部，第二和中部区域。 内部区域最靠近磁极的与介质相对的端部，第二区域距磁极的与介质相对的端部最远，并且中间区域在内部区域和第二区域之间。 内部区域的横截面高度垂直于围绕屏蔽物的面向介质的端部的横截面高度小于第二区域的横截面高度，并且中间区域的横截面高度大于横截面 内部区域的高度并且小于第二区域的横截面高度。

    Method and apparatus for optimizing record quality with varying track and linear density by allowing overlapping data tracks
    9.
    发明授权
    Method and apparatus for optimizing record quality with varying track and linear density by allowing overlapping data tracks 有权
    通过允许重叠的数据轨道来优化具有不同轨迹和线性密度的记录质量的方法和装置

    公开(公告)号：US07133241B2

    公开(公告)日：2006-11-07

    申请号：US11104209

    申请日：2005-04-11

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

    发明人： Xiaodong Che ,  Wen-Chien David Hsiao ,  Yansheng Luo ,  Xiaoyu Sui ,  Samuel Wei-san 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。

    System, method, and apparatus for in-situ stray magnetic field measurement
    10.
    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。