公开(公告)号：US07502197B1

公开(公告)日：2009-03-10

申请号：US11703000

申请日：2007-02-06

申请人： Jack M. Chue

发明人： Jack M. Chue

IPC分类号： G11B5/596 ,  G11B5/09

CPC分类号： G11B5/59655

摘要： A disk drive is disclosed including a disk having a first and second set of time-based servo patterns. The first set of time-based servo patterns comprises a first cyclical pattern that repeats radially over the disk, and the second set of time-based servo patterns comprises a second cyclical pattern that repeats radially over the disk, wherein each cyclical pattern comprises a plurality of timing marks. One of the first cyclical patterns overlaps at least part of a first servo track, and one of the second cyclical patterns overlaps at least part of the first servo track. At least one of the first and second set of time-based servo patterns are demodulated by detecting first and second time intervals relative to the timing marks, and a control signal for actuating the head is generated in response to the first and second time intervals.

摘要翻译： 公开了一种磁盘驱动器，包括具有第一和第二组基于时间的伺服模式的磁盘。 第一组基于时间的伺服模式包括在盘上径向重复的第一循环模式，并且第二组基于时间的伺服模式包括在盘上径向重复的第二循环模式，其中每个循环模式包括多个 的时间标记。 第一周期性图案中的一个与第一伺服轨道的至少一部分重叠，并且第二周期图案之一与第一伺服轨道的至少一部分重叠。 通过相对于定时标记检测第一和第二时间间隔来解调第一和第二组基于时间的伺服模式中的至少一个，并且响应于第一和第二时间间隔产生用于致动头的控制信号。

公开(公告)号：US07330327B1

公开(公告)日：2008-02-12

申请号：US10875637

申请日：2004-06-23

申请人： Jack M. Chue ,  Siri S. Weerasooriya ,  Jai N. Subrahmanyam

发明人： Jack M. Chue ,  Siri S. Weerasooriya ,  Jai N. Subrahmanyam

IPC分类号： G11B21/02 ,  G11B5/09 ,  G11B5/596

CPC分类号： G11B5/59633 ,  G11B5/59638 ,  G11B5/59661 ,  G11B5/59688

摘要： A method of servo writing a disk for use in a disk drive is disclosed by writing discontinuous spiral tracks on the disk to protect against overheating the head and/or preamp circuitry. A write clock is synchronized to the rotation of the disk, and a plurality of discontinuous spiral tracks are written on the disk. Each discontinuous spiral track is written at a predetermined circular location determined from the write clock, and each discontinuous spiral track comprises a plurality of segments separated by gaps. Each segment comprises a high frequency signal interrupted at a predetermined interval by a sync mark.

摘要翻译： 通过在盘上写入不连续的螺旋轨道来公开用于磁盘驱动器的伺服写入磁盘的方法，以防止头部和/或前置放大器电路过热。 写时钟与盘的旋转同步，并且多个不连续的螺旋轨道被写入盘上。 每个不连续螺旋轨迹被写入从写入时钟确定的预定的圆形位置，并且每个不连续的螺旋轨迹包括由间隙分开的多个段。 每个段包括通过同步标记以预定间隔中断的高频信号。

公开(公告)号：US07068461B1

公开(公告)日：2006-06-27

申请号：US10998978

申请日：2004-11-29

申请人： Jack M. Chue ,  Siri S. Weerasooriya ,  Tehri S. Lee

发明人： Jack M. Chue ,  Siri S. Weerasooriya ,  Tehri S. Lee

IPC分类号： G11B21/02

CPC分类号： G11B5/59633 ,  G11B5/59638

摘要： A disk drive is disclosed comprising a disk having a plurality of servo bursts written using perpendicular magnetic recording, wherein each servo burst is written at a servo burst frequency. A fill pattern is written between the servo bursts using perpendicular magnetic recording at a frequency substantially equal to an even harmonic of the servo burst frequency, and a phase shift occurs at the transition between the servo burst and the fill pattern. A head is actuated over the disk, and a sampling device samples a read signal emanating from the head to generate a sequence of read signal sample values. Control circuitry demodulates the servo bursts from the sequence of read signal sample values by computing a single-point Discrete Fourier Transform (DFT) at the servo burst frequency.

摘要翻译： 公开了一种磁盘驱动器，其包括具有使用垂直磁记录写入的多个伺服突发的盘，其中以伺服突发频率写入每个伺服脉冲串。 使用基本上等于伺服脉冲串频率的偶次谐波的频率的垂直磁记录在伺服脉冲串之间写入填充图案，并且在伺服脉冲串和填充图案之间的转变处发生相移。 头部被驱动到盘上，并且采样装置对从头部发出的读取信号进行采样以产生读取信号样本值的序列。 控制电路通过在伺服脉冲串频率处计算单点离散傅里叶变换（DFT），从读取信号采样值序列中解调伺服脉冲串。

公开(公告)号：US07027264B1

公开(公告)日：2006-04-11

申请号：US10698655

申请日：2003-10-31

申请人： Jai N. Subrahmanyam ,  Gopalakrishna Kote ,  Kathy X. Tang ,  Loi D Pham ,  Jack M. Chue

发明人： Jai N. Subrahmanyam ,  Gopalakrishna Kote ,  Kathy X. Tang ,  Loi D Pham ,  Jack M. Chue

IPC分类号： G11B5/60

CPC分类号： G11B5/6005 ,  G11B5/40 ,  G11B5/4853

摘要： According to an aspect of the present invention, there is provided a slider for a disk drive. The slider includes a slider body including a slider body outer surface. The slider further includes an inductive write head including main and return poles. The slider further includes a slider ground pad disposed at the slider body outer surface. The slider ground pad is disposed in electrical communication with the main and return poles for electrically grounding the main and return poles.

摘要翻译： 根据本发明的一个方面，提供了一种用于磁盘驱动器的滑块。 滑块包括滑块主体，其包括滑块体外表面。 滑块还包括一个包括主极和返回极的感应写头。 滑块还包括设置在滑块主体外表面处的滑块接地垫。 滑块接地焊盘设置成与主极和返回极电连通，用于使主极和返回极电接地。

公开(公告)号：US06943972B1

公开(公告)日：2005-09-13

申请号：US10609066

申请日：2003-06-27

申请人： Jack M. Chue ,  William C. Tipton, II ,  David P. Turner

发明人： Jack M. Chue ,  William C. Tipton, II ,  David P. Turner

IPC分类号： G11B5/09

CPC分类号： G11B5/59655 ,  G11B5/59688

摘要： A method of selecting a track density for a disk surface of a disk drive is disclosed. A first pattern is written along a circumferential path of the disk surface, wherein the first circumferential path comprise a first set of arcuate sections interleaved with a second set of arcuate sections. A second pattern is written radially offset from the circumferential path during time intervals corresponding to the first set of arcuate sections. The head is positioned substantially over the center of the first circumferential path and during time intervals corresponding to the second set of arcuate sections, the first pattern is read to generate a first read signal amplitude measurement A0, and during time intervals corresponding to the first set of arcuate sections, the first pattern is read to generate a second read signal amplitude measurement A1. A track density is selected in response to A0 and A1, wherein the track density is for use in writing embedded servo sectors to the disk surface.

摘要翻译： 公开了一种选择磁盘驱动器的磁盘表面的磁道密度的方法。 沿着盘表面的圆周路径写入第一图案，其中第一周向路径包括与第二组弓形部分交错的第一组弓形部分。 在对应于第一组弓形部分的时间间隔期间，将第二图案沿圆周路径径向偏移。 头部基本上位于第一圆周路径的中心上方，并且在对应于第二组弓形部分的时间间隔期间，读取第一图案以产生第一读取信号幅度测量A 0，并且在对应于第一 一组弧形部分，读取第一个图案以产生第二个读取信号幅度测量A 1。 响应于A 0和A 1选择轨道密度，其中轨道密度用于将嵌入式伺服扇区写入盘表面。

公开(公告)号：US07180703B1

公开(公告)日：2007-02-20

申请号：US10845863

申请日：2004-05-15

申请人： Jai N. Subrahmanyam ,  Jack M. Chue

发明人： Jai N. Subrahmanyam ,  Jack M. Chue

IPC分类号： G11B33/14

CPC分类号： G11B19/022 ,  G11B25/043

摘要： A disk drive is disclosed comprising a disk, a head actuated over the disk, and a spindle motor for rotating the disk. The spindle motor comprises a rotating component, a stationary component, and a first and second bearing assembly disposed between the rotating component and stationary component for rotating the rotating component about the stationary component, wherein the disk is attached to the rotating component. The bearing assemblies comprise a stationary component surface and a rotating component surface having a lubricant disposed there between. The first bearing assembly employs an anionic lubricant such that a first voltage forms between the stationary component surface and the rotating component surface when the rotating component rotates about the stationary component. The second bearing assembly employs a cationic lubricant such that a second voltage forms between the stationary component surface and the rotating component surface when the rotating component rotates about the stationary component. A polarity of the second voltage being opposite a polarity of the first voltage to thereby reduce the potential at the disk surface.

摘要翻译： 公开了一种磁盘驱动器，其包括盘，在盘上致动的头和用于旋转盘的主轴电机。 主轴电动机包括旋转部件，静止部件以及设置在旋转部件和固定部件之间的第一和第二轴承组件，用于围绕静止部件旋转旋转部件，其中盘附接到旋转部件。 轴承组件包括固定部件表面和具有设置在其间的润滑剂的旋转部件表面。 第一轴承组件采用阴离子润滑剂，使得当旋转部件围绕固定部件旋转时，在固定部件表面和旋转部件表面之间形成第一电压。 第二轴承组件使用阳离子润滑剂，使得当旋转部件围绕固定部件旋转时，在固定部件表面和旋转部件表面之间形成第二电压。 第二电压的极性与第一电压的极性相反，从而减小磁盘表面的电位。

公开(公告)号：US06885514B1

公开(公告)日：2005-04-26

申请号：US09920665

申请日：2001-07-31

申请人： Raffi Codilian ,  William D. Johns ,  Charles A. Park ,  David D. Nguyen ,  Jack M Chue

发明人： Raffi Codilian ,  William D. Johns ,  Charles A. Park ,  David D. Nguyen ,  Jack M Chue

IPC分类号： G11B5/596 ,  G11B21/02 ,  G11B27/36 ,  H04R31/00

CPC分类号： G11B5/59633 ,  G11B5/59638 ,  Y10T29/49036

摘要： A method of manufacturing a disk drive and a disk drive made with such method where the width of the read element and the width of the write element are both measured at servo-writing time and the track pitch of the disk drive is set on the basis of those measurements. Disk drives with superior head width combinations are servo-written with a narrower track pitch in order to have a higher storage capacity. Disk drives with inferior head width combinations are detected before servo-writing so that the disk drive may be servo-written with wider track pitch rather than with a nominal track pitch that results in a subsequent drive failure during initial burn-in (IBI). The heads are used more efficiently in that heads that are more capable are used to their ability and less capable heads that would otherwise be disposed of are used at all. Fewer disk drives are required to be reworked and returned to the servo-writing process.

摘要翻译： 一种制造盘驱动器和磁盘驱动器的方法，其中读取元件的宽度和写入元件的宽度均以伺服写入时间测量，并且基于磁盘驱动器的磁道间距设置 的这些测量。 具有优异头宽度组合的磁盘驱动器以较窄的磁道间距进行伺服写入，以具有更高的存储容量。 在伺服写入之前检测到具有较差头部宽度组合的磁盘驱动器，以便磁盘驱动器可以以更宽的磁道间距进行伺服写入，而不是在初始老化（IBI）期间导致后续驱动器故障的标称磁道间距。 头部被更有效地使用在那些使用能力更强的头部，否则将被处理的头部不太可用。 需要重新加工更少的磁盘驱动器并返回到伺服写入过程。

公开(公告)号：US07184230B1

公开(公告)日：2007-02-27

申请号：US10160954

申请日：2002-06-01

申请人： Jack M. Chue ,  Jai N. Subrahmanyam ,  Russ A. Quisenberry

发明人： Jack M. Chue ,  Jai N. Subrahmanyam ,  Russ A. Quisenberry

IPC分类号： G11B5/02

CPC分类号： G11B5/59605 ,  G11B5/5547

摘要： A system and method for processing track identifier errors to mitigate head instability in data storage devices is disclosed. The system and method includes computing a track id differential between an expected track id and a received track id, encoding the expected track id and the received track id, initiating a first action if the track id differential exceeds a pre-determined threshold and the encoded expected track id varies from the encoded received track id by a pre-configured number of bits, and initiating a second action if the track id differential does not exceed the pre-determined threshold or the encoded expected track id does not vary from the encoded received track id by a pre-configured number of bits.

摘要翻译： 公开了一种用于处理磁道标识符错误以减轻数据存储设备中的磁头不稳定性的系统和方法。 该系统和方法包括：计算预期轨迹id和接收轨迹id之间的轨道ID差分，编码预期轨道id和接收轨道id，如果轨道id差异超过预定阈值则启动第一动作， 预期轨迹id与编码的接收轨道id相差预先配置的比特数，并且如果轨道id差异不超过预定阈值或编码的预期轨道id不与编码的接收 轨道ID由预先配置的位数。

公开(公告)号：US07027256B1

公开(公告)日：2006-04-11

申请号：US10377078

申请日：2003-02-28

申请人： Jai N. Subrahmanyam ,  Jack M. Chue ,  Robert J. McNab

发明人： Jai N. Subrahmanyam ,  Jack M. Chue ,  Robert J. McNab

IPC分类号： G11B5/596

CPC分类号： G11B5/59627

摘要： A magnetic disk drive having a reduction in repeatable runout (RRO) effects is disclosed. The disk drive has a head disk assembly (HDA) and a sampled servo controller. The HDA includes a rotating magnetic disk, an actuator, and a transducer head. The magnetic disk has a plurality of embedded servo sectors for storing servo information including repeatable runout (RRO) cancellation values and RRO cancellation value error correction code (ECC) data at a servo data rate. The RRO cancellation value ECC data is only for detecting and correcting errors in the RRO cancellation values. In between the embedded servo sectors are data sectors for storing user data at a user data rate that is different from the servo data rate. The actuator positions the transducer head in response to a control effort signal generated by the sampled servo controller based on the servo information.

摘要翻译： 公开了具有减少可重复跳动（RRO）效应的磁盘驱动器。 磁盘驱动器具有头盘组件（HDA）和采样伺服控制器。 HDA包括旋转磁盘，致动器和换能器头。 磁盘具有多个嵌入式伺服扇区，用于以伺服数据速率存储包括可重复跳动（RRO）抵消值和RRO抵消值纠错码（ECC）数据的伺服信息。 RRO抵消值ECC数据仅用于检测和纠正RRO抵消值中的错误。 在嵌入式伺服扇区之间是用于以与伺服数据速率不同的用户数据速率存储用户数据的数据扇区。 执行器响应于由采样的伺服控制器基于伺服信息产生的控制力信号来定位换能器头。

公开(公告)号：US07016134B1

公开(公告)日：2006-03-21

申请号：US10946965

申请日：2004-09-21

申请人： Vinay K. Agarwal ,  Jack M. Chue ,  Robert L. Cloke

发明人： Vinay K. Agarwal ,  Jack M. Chue ,  Robert L. Cloke

IPC分类号： G11B5/09

CPC分类号： G11B5/59633 ,  G11B5/59661

摘要： A method of writing product servo sectors to a disk of a disk drive is disclosed. An external spiral servo writer writes a plurality of spiral tracks to the disk by actuating in a closed loop system a head positioning pin inserted into the disk drive. Each spiral track comprises a high frequency signal interrupted at a predetermined interval by a sync mark. The high frequency signal and sync marks in the spiral tracks are demodulated to maintain synchronization of a servo write clock as well as maintain the head along a circular target path while writing product servo sectors to the disk.

摘要翻译： 公开了一种将产品伺服扇区写入磁盘驱动器的盘的方法。 外部螺旋伺服写入器通过在闭环系统中致动插入盘驱动器中的头定位销来驱动多个螺旋轨道到盘。 每个螺旋轨道包括通过同步标记以预定间隔中断的高频信号。 解调螺旋轨道中的高频信号和同步标记，以保持伺服写入时钟的同步，并且在将产品伺服扇区写入盘时沿着圆形目标路径保持磁头。