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。

公开(公告)号：US20100142344A1

公开(公告)日：2010-06-10

申请号：US12709554

申请日：2010-02-22

申请人： Shanlin Duan ,  Jizhong He ,  John Stephen Hopkins ,  Yansheng Luo

发明人： Shanlin Duan ,  Jizhong He ,  John Stephen Hopkins ,  Yansheng Luo

IPC分类号： G11B27/36

CPC分类号： G11B5/6005

摘要： A method models and calibrates the fly height of a slider above the disk for disk drives. The calibration scheme uses the Wallace spacing loss equation and laser doppler velocimetry to predict fly height and detect the actual fly height of the slider. The slider is vibrated at selected resonances, such as by capacitive coupling to the disk, and the fly height is gradually reduced. In one version, contact between the slider and disk may be detected using an arm electronics sensor. The amplitude of mean-to-peak, vibration detection is used as an indication of the actual fly height and to calibrate the modeled fly height.

摘要翻译： 一种方法建模和校准磁盘驱动器磁盘上方的浮动高度。 校准方案使用华莱士间距损失方程和激光多普勒测速来预测飞行高度并检测滑块的实际飞行高度。 滑块以所选择的谐振振动，例如通过电容耦合到盘，并且飞行高度逐渐减小。 在一个版本中，可以使用臂电子传感器来检测滑块和盘之间的接触。 使用平均峰值振幅检测的幅度作为实际飞行高度的指示，并校准建模的飞行高度。

公开(公告)号：US07007252B2

公开(公告)日：2006-02-28

申请号：US10410903

申请日：2003-04-09

申请人： Alexander Gyure ,  Jindrich Zejda ,  Peivand Fallah-Tehrani ,  Wenyuan Wang ,  Chi-Chong Lo ,  Mahmoud Shahram ,  Yansheng Luo ,  William Chiu-Ting Shu ,  Seyed Alireza Kasnavi

发明人： Alexander Gyure ,  Jindrich Zejda ,  Peivand Fallah-Tehrani ,  Wenyuan Wang ,  Chi-Chong Lo ,  Mahmoud Shahram ,  Yansheng Luo ,  William Chiu-Ting Shu ,  Seyed Alireza Kasnavi

IPC分类号： G06F17/50 ,  G06F19/00 ,  G01R31/28 ,  G01R27/28 ,  G01R29/00

CPC分类号： G06F17/5036

摘要： One embodiment of the invention provides a system that characterizes cells within an integrated circuit. During operation, the system obtains a number of input noise signals to be applied to the cell. The system then simulates responses of the cell to each of the input noise signals, and stores a representation of the responses. This allows a subsequent analysis operation to access the stored representation to determine a response of the cell instead of having to perform a time-consuming simulation operation.

摘要翻译： 本发明的一个实施例提供了表征集成电路内的单元的系统。 在操作期间，系统获得要应用于单元的多个输入噪声信号。 然后，系统模拟单元对每个输入噪声信号的响应，并存储响应的表示。 这允许随后的分析操作访问存储的表示以确定单元的响应，而不必执行耗时的模拟操作。

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。

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。

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。

公开(公告)号：US20080158705A1

公开(公告)日：2008-07-03

申请号：US11648368

申请日：2006-12-28

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： G11B27/36

CPC分类号： G11B27/36 ,  G11B5/3196 ,  G11B5/455 ,  G11B2220/2516

摘要： A write head tester is disclosed. The write head tester includes a rotatably coupled magnetic media having a stand-off thereover. In addition, a write head holder is fixedly coupled with the tester. The write head holder receives and electrically couples a removably coupleable write head such that the removably coupleable write head is capable of performing a write on the magnetic media. A read head is also fixedly coupled with the tester. The read head is utilized for performing a read on the magnetic media. Furthermore, an evaluator is provided for accessing a result of the read on the magnetic media and evaluating the removably coupleable write head based on the read.

摘要翻译： 公开了一种写入头测试器。 写入头测试器包括一个可旋转耦合的磁性介质，其中有一个支架。 此外，写头保持架与测试仪固定连接。 写头保持器接收并电耦合可移除地可耦合的写入头，使得可移除地可耦合的写入头能够对磁性介质执行写入。 读头也与测试仪固定连接。 读取头用于对磁性介质进行读取。 此外，提供评估器用于访问磁介质上的读取结果并基于读取来评估可拆卸地耦合的写入头。

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。

公开(公告)号：US20050264930A1

公开(公告)日：2005-12-01

申请号：US10857363

申请日：2004-05-28

申请人： Savas Gider ,  Wen-Chien Hsiao ,  Quan-chiu Lam ,  Terence Lam ,  Edward Hin Lee ,  Yansheng Luo ,  Vladimir Nikitin ,  Changqing Shi ,  Xiaoyu Sui

发明人： Savas Gider ,  Wen-Chien Hsiao ,  Quan-chiu Lam ,  Terence Lam ,  Edward Hin Lee ,  Yansheng Luo ,  Vladimir Nikitin ,  Changqing Shi ,  Xiaoyu Sui

IPC分类号： G11B5/23 ,  G11B5/31

CPC分类号： G11B5/3116

摘要： A method and apparatus for providing a write head with an improved pole tip to improve overwrite and/or adjacent track interference. A cross pole tip writer is provided with a shape that is designed to reduce the saturation on the pole tip and aid in the concentration of flux to the down track.

摘要翻译： 一种用于向写头提供改进的极尖以改善覆盖和/或相邻轨道干扰的方法和装置。 十字极尖端写入器具有被设计成减小极尖上的饱和度的形状，并且有助于向下轨道的通量的集中。

公开(公告)号：US07724462B2

公开(公告)日：2010-05-25

申请号：US12184300

申请日：2008-08-01

申请人： Shanlin Duan ,  Jizhong He ,  John Stephen Hopkins ,  Yansheng Luo

发明人： Shanlin Duan ,  Jizhong He ,  John Stephen Hopkins ,  Yansheng Luo

IPC分类号： G11B21/02 ,  G11B27/36

CPC分类号： G11B5/6005

摘要： A method models and calibrates the fly height of a slider above the disk for disk drives. The calibration scheme uses the Wallace spacing loss equation and laser doppler velocimetry to predict fly height and detect the actual fly height of the slider. The slider is vibrated at selected resonances, such as by capacitive coupling to the disk, and the fly height is gradually reduced. In one version, contact between the slider and disk may be detected using an arm electronics sensor. The amplitude of mean-to-peak, vibration detection is used as an indication of the actual fly height and to calibrate the modeled fly height.

摘要翻译： 一种方法建模和校准磁盘驱动器磁盘上方的浮动高度。 校准方案使用华莱士间距损失方程和激光多普勒测速来预测飞行高度并检测滑块的实际飞行高度。 滑块以所选择的谐振振动，例如通过电容耦合到盘，并且飞行高度逐渐减小。 在一个版本中，可以使用臂电子传感器来检测滑块和盘之间的接触。 使用平均峰值振幅检测的幅度作为实际飞行高度的指示，并校准建模的飞行高度。