公开(公告)号：US20090201611A1

公开(公告)日：2009-08-13

申请号：US12384742

申请日：2009-04-08

申请人： Lijie Guan ,  Hung Liang Hu ,  Yaw Shing Tang

发明人： Lijie Guan ,  Hung Liang Hu ,  Yaw Shing Tang

IPC分类号： G11B5/60 ,  G11B5/127

CPC分类号： G11B5/1475 ,  G11B5/1278 ,  G11B5/315 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49052

摘要： Prior art designs of single pole writers have been limited by premature saturation at the tip. This limits the head field that can be achieved without simultaneously widening the write profile. This problem has bee solved by means of a vertical main pole whose thickness has its conventional value a short distance from the tip but that tapers down to a significantly reduced value as it approaches the tip. A process for manufacturing this tapered tip design is also presented.

公开(公告)号：US07289295B2

公开(公告)日：2007-10-30

申请号：US10844170

申请日：2004-05-12

申请人： Lijie Guan ,  Hung Liang Hu ,  Yaw Shing Tang ,  Kochan Ju

发明人： Lijie Guan ,  Hung Liang Hu ,  Yaw Shing Tang ,  Kochan Ju

IPC分类号： G11B5/127

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

摘要： In a single vertical pole magnetic writer, flux passing through the return pole can sometimes be strong enough to erase previously recorded data. This problem has been overcome by the addition of a second return pole that is magnetically connected to the conventional return pole for the purpose of collecting leaked flux, thereby preventing it from reaching the underlayer.

摘要翻译： 在单个垂直磁极写入器中，通过返回极的磁通有时足够强大以擦除先前记录的数据。 这个问题已经通过添加磁性连接到常规返回极的第二返回极来克服，以便收集泄漏的通量，从而防止其到达底层。

公开(公告)号：US5357520A

公开(公告)日：1994-10-18

申请号：US830032

申请日：1992-01-31

申请人： Patrick C. Arnett ,  Jonathan D. Coker ,  Richard L. Galbraith ,  Yaw-Shing Tang ,  Roger W. Wood

发明人： Patrick C. Arnett ,  Jonathan D. Coker ,  Richard L. Galbraith ,  Yaw-Shing Tang ,  Roger W. Wood

IPC分类号： G11B5/09 ,  G11B20/10 ,  G11B20/18 ,  G11C29/00

CPC分类号： G11B20/10194 ,  G11B20/10055 ,  G11B20/182

摘要： A method and apparatus are provided for determining an adjustable precompensation value in a partial-response maximum-likelihood (PRML) data channel. The PRML data channel includes an adjustable precompensation function for modulating the write data waveform. A predetermined test pattern is written using write circuitry in the disk file. The predetermined test pattern is insensitive to channel misequalization and provides a reference for gain and timing control. The written predetermined test pattern is read back using read circuitry in the disk file. An error in sample values in the read back predetermined test pattern is identified using logic provided in the PRML data channel while performing a standard read operation of a data sector written with the test pattern. The adjustable write precompensation value is adjusted responsive to identifying an error.

摘要翻译： 提供了一种用于确定部分响应最大似然（PRML）数据信道中的可调节预补偿值的方法和装置。 PRML数据通道包括用于调制写数据波形的可调预补偿功能。 使用磁盘文件中的写入电路写入预定的测试模式。 预定的测试模式对信道估计不敏感，并为增益和定时控制提供参考。 使用磁盘文件中的读取电路读取写入的预定测试模式。 使用在PRML数据通道中提供的逻辑，在执行用测试图案写入的数据扇区的标准读取操作的同时，使用读取的预定测试图案中的采样值的错误来识别。 响应于识别错误来调整可调写入预补偿值。

公开(公告)号：US07934310B2

公开(公告)日：2011-05-03

申请号：US12384761

申请日：2009-04-08

申请人： Lijie Guan ,  Hung Liang Hu ,  Yaw Shing Tang

发明人： Lijie Guan ,  Hung Liang Hu ,  Yaw Shing Tang

IPC分类号： G11B5/127 ,  H04R31/00

CPC分类号： G11B5/1475 ,  G11B5/1278 ,  G11B5/315 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49052

摘要： Prior art designs of single pole writers have been limited by premature saturation at the tip. This limits the head field that can be achieved without simultaneously widening the write profile. This problem has bee solved by means of a vertical main pole whose thickness has its conventional value a short distance from the tip but that tapers down to a significantly reduced value as it approaches the tip. A process for manufacturing this tapered tip design is also presented.

摘要翻译： 单极写入器的现有技术设计已经受到尖端处的过早饱和的限制。 这限制了可以实现的头部场，而不会同时加宽写入轮廓。 这个问题已经通过一个垂直的主极来解决，该垂直主极的厚度具有与尖端相距很短的常规值，但随着接近尖端而逐渐减小到显着降低的值。 还提出了一种用于制造该锥形尖端设计的工艺。

公开(公告)号：US07777988B2

公开(公告)日：2010-08-17

申请号：US12384742

申请日：2009-04-08

申请人： Lijie Guan ,  Hung Liang Hu ,  Yaw Shing Tang

发明人： Lijie Guan ,  Hung Liang Hu ,  Yaw Shing Tang

IPC分类号： G11B5/11

CPC分类号： G11B5/1475 ,  G11B5/1278 ,  G11B5/315 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49052

摘要： Prior art designs of single pole writers have been limited by premature saturation at the tip. This limits the head field that can be achieved without simultaneously widening the write profile. This problem has been solved by means of a vertical main pole whose thickness has its conventional value a short distance from the tip but that tapers down to a significantly reduced value as it approaches the tip. A process for manufacturing this tapered tip design is also presented.

摘要翻译： 单极写入器的现有技术设计已经受到尖端处的过早饱和的限制。 这限制了可以实现的头部场，而不会同时加宽写入轮廓。 这个问题已经通过一个垂直的主极来解决，该垂直主极的厚度具有与尖端相距很短的常规值，但随着接近尖端而逐渐减小到显着降低的值。 还提出了一种用于制造该锥形尖端设计的工艺。

公开(公告)号：US20060203395A1

公开(公告)日：2006-09-14

申请号：US11074416

申请日：2005-03-08

申请人： Lijie Guan ,  Yaw-Shing Tang ,  Ellis Cha

发明人： Lijie Guan ,  Yaw-Shing Tang ,  Ellis Cha

IPC分类号： G11B5/33 ,  G11B5/127 ,  H04R31/00

CPC分类号： G11B5/1278 ,  Y10T29/49046 ,  Y10T29/49048

摘要： The inadvertent introduction of stray fields at the media surface by the shields that form part of a magnetic read-write head has been eliminated by using a combination of masking and ion milling to remove small amounts of material close to the shields' outer edges. As a consequence, instead of presenting a sharp edge to the ABS, a shield's lower surface slopes gently away from it.

摘要翻译： 通过使用掩模和离子铣削的组合来除去形成磁性读写头的一部分的屏蔽，在介质表面上无意中引入杂散场已经消除，以去除靠近屏蔽外边缘的少量材料。 因此，屏蔽层的下表面不是向ABS呈现锋利的边缘，而是轻轻地远离其。

公开(公告)号：US07042682B2

公开(公告)日：2006-05-09

申请号：US10688046

申请日：2003-10-17

申请人： Hung Liang Hu ,  Yaw Shing Tang ,  Liji Guan ,  Kochan Ju

发明人： Hung Liang Hu ,  Yaw Shing Tang ,  Liji Guan ,  Kochan Ju

IPC分类号： G11B5/127

CPC分类号： G11B5/1278 ,  G11B5/11 ,  G11B5/127 ,  G11B5/3116 ,  G11B5/3146 ,  G11B5/315

摘要： Conventional perpendicular writers that utilize an extended return pole are subject to large flux leakage. This problem has been reduced in the prior art by adding a downstream shield. This still leaves significant upstream leakage. This has now been eliminated by adding an upstream shield and then connecting the up and downstream shields by using side shields. The latter need not extend all the way from the downstream to the upstream shield in which case their thickness is increased relative to the full side shields.

摘要翻译： 使用扩展返回极的常规垂直写入器会受到大的漏磁。 通过添加下游屏蔽，现有技术中已经减少了这个问题。 这仍然导致重大的上游泄漏。 现在已经通过添加上游屏蔽，然后通过使用侧屏蔽连接上下屏蔽来消除这一点。 后者不需要从下游延伸到上游屏蔽，在这种情况下，它们的厚度相对于全侧屏蔽增加。

公开(公告)号：US08045295B2

公开(公告)日：2011-10-25

申请号：US12145464

申请日：2008-06-24

申请人： Yen Fu ,  Ellis T. Cha ,  Po-Kang Wang ,  Hong Tian ,  Manuel Hernandez ,  Yaw-Shing Tang ,  Ben Hu

发明人： Yen Fu ,  Ellis T. Cha ,  Po-Kang Wang ,  Hong Tian ,  Manuel Hernandez ,  Yaw-Shing Tang ,  Ben Hu

IPC分类号： G11B5/55

CPC分类号： H05K3/3442 ,  B24B37/00 ,  B24D18/00 ,  G11B5/4853 ,  H05K1/0215 ,  H05K2201/10727 ,  Y02P70/613

摘要： Method and apparatus are presented for electrically coupling a slider to ground. In one embodiment, a bonding pad is provided on a side of the slider body separate from the bonding pad(s) used for read/write signals. This separate bonding pad is electrically coupled within the slider body to components that are to be coupled to ground. A separate conductor provided on the suspension (e.g., a trace, a flex circuit, etc.) may be electrically coupled to the separate bonding pad via gold ball bonding. The conductor is also coupled to ground in the hard-disk drive device (e.g., via the preamplifier). The use of the separated bonding pad and trace may negate the need to use a conductive adhesive to electrically ground the slider via its attachment to the tongue of a slider.

摘要翻译： 呈现用于将滑块电耦合到地面的方法和装置。 在一个实施例中，接合焊盘设置在与用于读/写信号的接合焊盘分开的滑块体的一侧上。 该单独的接合焊盘在滑块体内电耦合到要耦合到地面的部件。 设置在悬架上的单独的导体（例如，迹线，柔性电路等）可以通过金球接合电耦合到单独的接合焊盘。 导体也耦合到硬盘驱动装置中的接地（例如，经由前置放大器）。 使用分离的接合焊盘和迹线可能会使得不需要使用导电粘合剂来将滑块经由其附接件电连接到滑块的舌部。

公开(公告)号：US20090207525A1

公开(公告)日：2009-08-20

申请号：US12384691

申请日：2009-04-08

申请人： Lijie Guan ,  Hung Liang Hu ,  Yaw Shing Tang

发明人： Lijie Guan ,  Hung Liang Hu ,  Yaw Shing Tang

IPC分类号： G11B5/127

CPC分类号： G11B5/1475 ,  G11B5/1278 ,  G11B5/315 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49052

摘要： Prior art designs of single pole writers have been limited by premature saturation at the tip. This limits the head field that can be achieved without simultaneously widening the write profile. This problem has bee solved by means of a vertical main pole whose thickness has its conventional value a short distance from the tip but that tapers down to a significantly reduced value as it approaches the tip. A process for manufacturing this tapered tip design is also presented.

公开(公告)号：US07322095B2

公开(公告)日：2008-01-29

申请号：US10828888

申请日：2004-04-21

申请人： Lijie Guan ,  Yaw Shing Tang ,  Hung Liang Hu

发明人： Lijie Guan ,  Yaw Shing Tang ,  Hung Liang Hu

IPC分类号： B11B5/187

CPC分类号： G11B5/315 ,  G11B5/11 ,  G11B5/1278 ,  Y10T29/49032 ,  Y10T29/49039 ,  Y10T29/49043 ,  Y10T29/49044

摘要： A process for reducing fringe field effects of a main write pole by shielding it on all four sides, with the regular return pole also serving as the leading edge shield, is described. The main pole may also be tapered and the leading edge and side shields may be magnetically connected to each other.

摘要翻译： 描述了通过在主四面上屏蔽主写字杆的边缘场效应的方法，其中普通返回极也用作前缘屏蔽。 主极也可以是锥形的，并且前缘和侧护罩可以彼此磁性连接。