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1.发明授权Servo writing a disk drive by overwriting a harmonic frequency fill pattern in the servo burst area 失效通过覆盖伺服突发区域中的谐波频率填充模式来伺服写入磁盘驱动器公开(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。
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2.发明授权Adjusting track density by changing slope of spiral tracks used to servo write a disk drive 有权通过改变用于伺服写入磁盘驱动器的螺旋轨迹的斜率来调整轨道密度公开(公告)号：US07433143B1
公开(公告)日：2008-10-07
申请号：US10943287
申请日：2004-09-17
申请人： Wing Ying , Jack M. Chue , Siri S. Weerasooriya , Tehri S. Lee
发明人： Wing Ying , Jack M. Chue , Siri S. Weerasooriya , Tehri S. Lee
IPC分类号： G11B5/09
CPC分类号： G11B5/012 , G11B5/5534 , G11B5/59633 , G11B5/59661
摘要： A method and apparatus is disclosed for adjusting the track density by changing the slope of spiral tracks used to servo write a disk drive. A target track density is established for a disk surface, and a plurality of spiral tracks are written to the disk surface in response to the target track density. Each spiral track comprises a high frequency signal interrupted at a predetermined interval by a sync mark, and a slope of the spiral tracks is selected in response to the target track density. The head internal to the disk drive is used to read the spiral tracks in order to write product servo sectors to the disk to define a plurality of data tracks, wherein the slope of the spiral tracks determines the density of the data tracks.
摘要翻译： 公开了一种用于通过改变用于伺服写入磁盘驱动器的螺旋磁道的斜率来调整磁道密度的方法和装置。 针对磁盘表面建立目标磁道密度，并且响应于目标磁道密度将多个螺旋磁道写入磁盘表面。 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，并且响应于目标轨道密度选择螺旋轨道的斜率。 磁盘驱动器内部的磁头用于读取螺旋磁道，以便将产品伺服扇区写入磁盘以定义多个数据磁道，其中螺旋磁道的斜率决定数据磁道的密度。
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3.发明授权Adjusting track density over disk radius by changing slope of spiral tracks used to servo write a disk drive 失效通过改变用于伺服写入磁盘驱动器的螺旋轨迹的斜率来调整磁盘半径的磁道密度公开(公告)号：US06987636B1
公开(公告)日：2006-01-17
申请号：US10943629
申请日：2004-09-17
申请人： Jack M. Chue , Siri S. Weerasooriya , Tehri S. Lee
发明人： Jack M. Chue , Siri S. Weerasooriya , Tehri S. Lee
CPC分类号： G11B5/59633
摘要： A method and apparatus is disclosed for adjusting the track density over the disk radius by changing the slope of spiral tracks used to servo write a disk drive. A plurality of spiral tracks are written to the disk wherein each spiral track comprises a high frequency signal interrupted at a predetermined interval by a sync mark. A slope of the spiral tracks over a first radial segment of the disk is substantially steeper than the slope of the spiral tracks over a second radial segment of the disk. The head internal to the disk drive is used to read the spiral tracks in order to write product servo sectors to the disk to define a plurality of data tracks. The steeper slope of the spiral tracks over the first radial segment causes a track density of the data tracks to be lower over the first radial segment compared to the track density of the data tracks over the second radial segment.
摘要翻译： 公开了一种用于通过改变用于伺服写入磁盘驱动器的螺旋磁道的斜率来调整磁盘半径上的磁道密度的方法和装置。 多个螺旋轨道被写入盘，其中每个螺旋轨道包括以预定间隔被同步标记中断的高频信号。 在盘的第一径向段上的螺旋形轨道的斜面基本上比盘的第二径向段上的螺旋形轨道的斜率更陡。 磁盘驱动器内部的磁头用于读取螺旋磁道，以便将产品伺服扇区写入磁盘以定义多个数据磁道。 与第二径向段上的数据轨道的轨道密度相比，第一径向段上的螺旋轨道的较陡的斜率导致数据轨道的轨道密度比第一径向段更低。
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4.发明授权Servo writing a disk drive by writing discontinuous spiral tracks to prevent overheating 有权通过写入不连续的螺旋轨道来编写磁盘驱动器，以防止过热公开(公告)号：US07330327B1
公开(公告)日：2008-02-12
申请号：US10875637
申请日：2004-06-23
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。
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5.发明授权Disk drive comprising a spindle motor employing anionic/cationic lubricant to reduce disk surface potential 有权磁盘驱动器包括使用阴离子/阳离子润滑剂以减小磁盘表面电位的主轴电动机公开(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。
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6.发明授权System and method for processing track identifier errors to mitigate head instability in data storage devices 有权用于处理跟踪标识符错误以缓解数据存储设备中的头部不稳定性的系统和方法公开(公告)号：US07184230B1
公开(公告)日：2007-02-27
申请号：US10160954
申请日：2002-06-01
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。
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7.发明授权Disk drive having servo sectors that store repeatable runout correction values and related error correction code data 有权具有伺服扇区的磁盘驱动器，其存储可重复的跳动校正值和相关的纠错码数据公开(公告)号：US07027256B1
公开(公告)日：2006-04-11
申请号：US10377078
申请日：2003-02-28
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。
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8.发明授权Using an external spiral servo writer to write spiral tracks to a disk to facilitate writing product servo sectors to the disk 失效使用外部螺旋伺服写入器将螺旋轨迹写入磁盘，以便于将产品伺服扇区写入磁盘公开(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。
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公开(公告)号：US06801402B1
公开(公告)日：2004-10-05
申请号：US10286170
申请日：2002-10-31
IPC分类号： G11B540
CPC分类号： G11B5/4853 , G11B5/40 , G11B5/484 , G11B5/486 , H05K1/0259 , H05K1/056 , H05K1/167
摘要： A Head Gimbal Assembly (HGA) for use in a disk drive and further includes a head having a read element and a write element; and a Trace Gimbal Assembly (TGA) attached to the head. The TGA includes a conductor array having a first end connected to the read element and the write element and a distal end for connecting the read element and the write element to a signal processing circuit, a conductive substrate supporting the head and the conductor array and a dielectric layer disposed between the conductor array and the conductive substrate. The TGA further includes a shunt connected at the distal end for shunting the read element; and an anti-static coating, covering a substantial portion of the conductor array for neutralizing electrostatic charge accumulation on the conductor array.
摘要翻译： 一种用于磁盘驱动器的磁头万向节组件（HGA），还包括具有读取元件和写入元件的磁头; 和一个跟踪云台组件（TGA）。 TGA包括具有连接到读取元件和写入元件的第一端的导体阵列和用于将读取元件和写入元件连接到信号处理电路的远端，支撑头部和导体阵列的导电基底和 布置在导体阵列和导电基底之间的介电层。 TGA还包括在远端连接用于分流读取元件的分流器; 以及防静电涂层，其覆盖导体阵列的大部分，以中和导体阵列上的静电电荷积聚。
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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
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。
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