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1. 发明授权

US06433950B1 Disk drive with radially dispersed servo bursts 有权
标题翻译：磁盘驱动器具有径向分散的伺服突发
公开(公告)号：US06433950B1
公开(公告)日：2002-08-13
申请号：US09574576
申请日：2000-05-19
申请人： Bruce Liikanen
发明人： Bruce Liikanen
IPC分类号： G11B5596
CPC分类号： G11B5/59683 , G11B5/5526 , G11B5/596 , G11B5/59655 , G11B5/59688 , G11B23/0007
摘要： A disk which incorporates a variable-phase servo burst pattern is disclosed. The disk has servo information thereon. The servo information includes a first servo burst pattern written on a first track and a second servo burst pattern written on a second track. Both the first servo burst pattern and the second servo burst pattern have a plurality of transition pulses. The corresponding transition pulses of the first servo burst pattern and the second servo burst pattern are 180 degrees out of phase from one another. Furthermore, a method of writing servo-information which is used to position a magneto-resistive head on a centerline of a track is also disclosed. The method includes the steps of (1) writing a first servo burst pattern on a first track, the first servo burst pattern having a plurality of transition pulses; and (2) writing a second servo burst pattern on a second track, the second servo burst pattern having a plurality of transition pulses, wherein the corresponding transition pulses of the first servo burst pattern and the second servo burst pattern are 180 degrees out of phase from one another.
摘要翻译：公开了一种包含可变相伺服突发图案的盘。盘上有伺服信息。伺服信息包括写在第一轨道上的第一伺服脉冲串模式和写在第二磁道上的第二伺服脉冲串模式。第一伺服脉冲串模式和第二伺服脉冲串模式都具有多个转换脉冲。第一伺服突发图案和第二伺服突发图案的相应转换脉冲彼此相位相差180度。此外，还公开了一种用于将磁阻头定位在轨道的中心线上的伺服信息的写入方法。该方法包括以下步骤：（1）在第一磁道上写入第一伺服脉冲串模式，第一伺服脉冲串模式具有多个转换脉冲; 以及（2）在第二磁道上写入第二伺服脉冲串模式，所述第二伺服脉冲串模式具有多个转换脉冲，其中所述第一伺服脉冲串模式和所述第二伺服脉冲串模式的相应转换脉冲是相位相差180度从彼此。

2. 发明授权

US6005740A Method and apparatus for developing position error curves for magneto-resistive heads 失效
标题翻译：用于开发磁阻头的位置误差曲线的方法和装置
公开(公告)号：US6005740A
公开(公告)日：1999-12-21
申请号：US942131
申请日：1997-10-01
申请人： Bruce Liikanen
发明人： Bruce Liikanen
IPC分类号： G11B5/55 , G11B5/596 , G11B21/08 , G11B21/10
CPC分类号： G11B5/5534 , G11B21/085 , G11B21/106 , G11B5/59655 , G11B5/59683 , G11B5/59688
摘要： A disk having a servo burst pattern used for generating PES curves for MR heads is disclosed. The disk has a plurality of tracks and each of the tracks has a track width. The servo burst pattern includes a first servo burst and a second servo burst forming a first servo burst pair; and, a third servo burst and a fourth servo burst forming a second servo burst pair. The second servo burst pair is circumferentially adjacent to the first servo burst pair. The third servo burst spans a distance of (TW/2+K(TW/2)), while the fourth servo burst spans a distance of ((TW/2+(2-K)(TW/2)). In the above equations, TW equals the track width and 0
摘要翻译：公开了一种具有用于产生MR磁头的PES曲线的伺服脉冲串模式的磁盘。盘具有多个轨道，并且每个轨道具有轨道宽度。伺服脉冲串模式包括形成第一伺服脉冲串对的第一伺服脉冲串和第二伺服脉冲串; 以及形成第二伺服脉冲串对的第三伺服脉冲串和第四伺服脉冲串。第二伺服脉冲串对与第一伺服脉冲串对周向相邻。第三个伺服脉冲串跨过（TW / 2 + K（TW / 2））的距离，而第四个伺服脉冲串的距离为（（TW / 2 +（2-K）（TW / 2）））此外，还公开了一种生成包括磁头驱动器的磁盘驱动器的PES曲线的方法以及其上写有伺服脉冲串图形的磁盘，该方法包括：（1）从磁盘读取伺服脉冲串模式的步骤，伺服脉冲串模式包括在第一点相交的第一和第二伺服脉冲串，第一和第二伺服脉冲串图形具有彼此相等的宽度，第三以及第四伺服脉冲串图形，其在径向位于第一点与另一轨道中心线之间的第二点处彼此相交，第三伺服脉冲串图案的宽度等于K（TW / 2），第四伺服脉冲串图形具有宽度等于（2-K）（TW / 2），其中0

3. 发明授权

US07561370B2 Seam to seam embedded runout correction propagation 失效
标题翻译：接缝缝合嵌入式跳动校正传播
公开(公告)号：US07561370B2
公开(公告)日：2009-07-14
申请号：US11846409
申请日：2007-08-28
申请人： Thomas O. Melrose , Bruce Liikanen , John C. Purkett
发明人： Thomas O. Melrose , Bruce Liikanen , John C. Purkett
IPC分类号： G11B5/596
CPC分类号： G11B5/59627
摘要： Various embodiments of the present invention are generally directed to propagating repeated runout (RRO) correction values for radially concentric servo seams on a storage medium in relation to an RRO correction value for an adjacent seam and a radial separation between the seams.
摘要翻译：本发明的各种实施例通常涉及相对于相邻接缝的RRO校正值和接缝之间的径向间隔传播在存储介质上的径向同心伺服接缝的重复跳动（RRO）校正值。

4. 发明授权

US07551387B2 Servo writing with offset compensation for prewritten reference 有权
标题翻译：具有偏移补偿的伺服写入用于预写参考
公开(公告)号：US07551387B2
公开(公告)日：2009-06-23
申请号：US11740747
申请日：2007-04-26
申请人： Yu Sun , Dave McMurtrey , Bruce Liikanen , Don Brunnett , John W. VanLaanen , Charles R. Watt , Stan Shepherd , S. Craig Smith , Todd Franks , Lin Guo
发明人： Yu Sun , Dave McMurtrey , Bruce Liikanen , Don Brunnett , John W. VanLaanen , Charles R. Watt , Stan Shepherd , S. Craig Smith , Todd Franks , Lin Guo
IPC分类号： G11B21/02
CPC分类号： G11B25/043 , G11B5/59627 , G11B5/59661 , G11B5/59666
摘要： In accordance with various embodiments, a rotatable member is mounted to a spindle hub so that initial servo data previously provided to the rotatable member are eccentrically offset with respect to a rotational center of the spindle hub. Compensation vales are determined to characterize said offset, after which final servo data are provided to the rotatable member in relation to the initial servo data and the determined compensation values. The final servo data are nominally concentric with the rotational center of the spindle hub.
摘要翻译：根据各种实施例，可旋转构件安装到主轴毂，使得先前提供给可旋转构件的初始伺服数据相对于主轴毂的旋转中心偏心偏移。确定补偿值以表征所述偏移，之后相对于初始伺服数据和确定的补偿值将最终伺服数据提供给可旋转构件。最终伺服数据名义上与主轴毂的旋转中心同心。

5. 发明授权

US07253982B1 Dynamic shock detection in disk drive using hair trigger timer 有权
标题翻译：使用头发触发定时器在磁盘驱动器中进行动态震动检测
公开(公告)号：US07253982B1
公开(公告)日：2007-08-07
申请号：US11110098
申请日：2005-04-19
申请人： Don Brunnett , John Purkett , Bruce Liikanen
发明人： Don Brunnett , John Purkett , Bruce Liikanen
IPC分类号： G11B19/04
CPC分类号： G11B19/04 , G11B5/5582 , G11B19/06
摘要： Dynamically detecting off-track errors in a disk drive by adjusting transducer head position control parameters in response to shock events. In an embodiment, shock events with large magnitude trigger a severe shock timer which lengthens the write fault before write operations resume. In another embodiment, a lower shock threshold is used following an initial shock event. In yet another embodiment, a lower shock threshold is used if an accumulated average position error of the transducer head is large.
摘要翻译：通过根据冲击事件调整换能器头部位置控制参数来动态地检测磁盘驱动器中的偏离磁道错误。在一个实施例中，具有大幅度的冲击事件触发严重的冲击计时器，其在写入操作恢复之前延长写入故障。在另一个实施例中，在初始冲击事件之后使用较低的冲击阈值。在另一个实施例中，如果换能器头的累积的平均位置误差较大，则使用较低的冲击阈值。

6. 发明授权

US07729076B2 Angularly spaced spiral erase for media 有权
标题翻译：用于介质的角度间隔螺旋擦除
公开(公告)号：US07729076B2
公开(公告)日：2010-06-01
申请号：US11750918
申请日：2007-05-18
申请人： Craig Smith , Brian Rigney , Todd Franks , Xin H. Yang , Stan Shepherd , Bruce Liikanen
发明人： Craig Smith , Brian Rigney , Todd Franks , Xin H. Yang , Stan Shepherd , Bruce Liikanen
IPC分类号： G11B5/03
CPC分类号： G11B5/024
摘要： Embodiments of the present invention allow for media erasure. Various embodiments allow for controlling an actuator based on feedback signal measurements and disk phase to seek a head across a surface of a disk systematically for an erasure operation. Also, in various embodiments, a substantially repeatable seek motion of a head across a stroke may be determined, and launch points at which the head is launched over a disk in the seek motion for erasing at least a portion of the disk are determined based on disk phase.
摘要翻译：本发明的实施例允许媒体擦除。各种实施例允许基于反馈信号测量和磁盘相位来控制致动器，以系统地跨磁盘的表面寻找头以进行擦除操作。此外，在各种实施例中，可以确定头部横跨笔划的基本上可重复的寻道运动，并且基于用于擦除盘的至少一部分的寻道运动中的磁头在磁盘上发射的发射点基于磁盘相位。

7. 发明申请

US20070268619A1 ANGULARLY SPACED SPIRAL ERASE FOR MEDIA 有权
标题翻译：用于介质的角膜间隙螺旋细胞
公开(公告)号：US20070268619A1
公开(公告)日：2007-11-22
申请号：US11750918
申请日：2007-05-18
申请人： Craig Smith , Brian Rigney , Todd Franks , Xin Yang , Stan Shepherd , Bruce Liikanen
发明人： Craig Smith , Brian Rigney , Todd Franks , Xin Yang , Stan Shepherd , Bruce Liikanen
IPC分类号： G11B5/596 , G11B5/03
CPC分类号： G11B5/024
摘要： Embodiments of the present invention allow for media erasure. Various embodiments allow for controlling an actuator based on feedback signal measurements and disk phase to seek a head across a surface of a disk systematically for an erasure operation. Also, in various embodiments, a substantially repeatable seek motion of a head across a stroke may be determined, and launch points at which the head is launched over a disk in the seek motion for erasing at least a portion of the disk are determined based on disk phase.
摘要翻译：本发明的实施例允许媒体擦除。各种实施例允许基于反馈信号测量和磁盘相位来控制致动器，以系统地跨磁盘的表面寻找头以进行擦除操作。此外，在各种实施例中，可以确定头部横跨笔划的基本上可重复的寻道运动，并且基于用于擦除盘的至少一部分的寻道运动中的磁头在磁盘上发射的发射点基于磁盘相位。

8. 发明授权

US06987628B1 Method and apparatus for high fly write detection using stored amplitude values 失效
标题翻译：使用存储的振幅值进行高速写入检测的方法和装置
公开(公告)号：US06987628B1
公开(公告)日：2006-01-17
申请号：US09905604
申请日：2001-07-13
申请人： Jerry A. Moline , Bruce Liikanen , Julian Lewkowicz
发明人： Jerry A. Moline , Bruce Liikanen , Julian Lewkowicz
IPC分类号： G11B27/36
CPC分类号： G11B27/36 , G11B5/6029
摘要： A method and apparatus for detecting a high flying condition of a transducer head in a computer disk drive is provided. The method and apparatus allow the detection of high fly write events that occur over one or a small number of data sectors. In addition, the present invention provides a method and apparatus for detecting high fly write events with a great deal of sensitivity. The method and apparatus of the present invention provide quick response and high sensitivity by monitoring the strength of a signal derived from data written to the disk, and signaling a high fly write event if the monitored signal strength in connection with a particular piece of data is less than a stored high fly write number corresponding to that piece of data by a predetermined amount.
摘要翻译：提供一种用于检测计算机磁盘驱动器中的换能器头的高飞行状态的方法和装置。该方法和装置允许检测在一个或少量数据扇区上发生的高飞写入事件。另外，本发明提供了用于以高灵敏度检测高飞写入事件的方法和装置。本发明的方法和装置通过监视从写入盘的数据得到的信号的强度来提供快速响应和高灵敏度，并且如果与特定数据片相关的监视信号强度为小于与该数据片相对应的预定量的存储的高速写入号码。

9. 发明授权

US06678102B1 High fly write detection method 有权
标题翻译：高飞写检测方法
公开(公告)号：US06678102B1
公开(公告)日：2004-01-13
申请号：US09649660
申请日：2000-08-29
申请人： Bruce Liikanen , Julian Lewkowicz , Larry Koudele
发明人： Bruce Liikanen , Julian Lewkowicz , Larry Koudele
IPC分类号： G11B2736
CPC分类号： G11B27/36 , G11B5/6029 , G11B20/10027 , G11B20/1816 , G11B2020/1281 , G11B2220/2516
摘要： A method and apparatus for detecting a high fly write event in a computer disk drive is provided. The method and apparatus allow the detection of high fly write events occurring over very short time spans. In addition, the present invention provides a method and apparatus for detecting high fly write events with a great deal of sensitivity. The method and apparatus of the present invention provide quick response and high sensitivity by monitoring the strength of a signal derived from a servo sector position burst or a group of bursts, and signaling a high fly write event if the monitored signal strength is less than a predetermined or threshold amount.
摘要翻译：提供了一种用于检测计算机磁盘驱动器中的高飞写入事件的方法和装置。该方法和装置允许检测在非常短的时间跨度上发生的高飞写入事件。另外，本发明提供了用于以高灵敏度检测高飞写入事件的方法和装置。本发明的方法和装置通过监视从伺服扇区位置脉冲串或一组脉冲串导出的信号的强度来提供快速响应和高灵敏度，并且如果所监视的信号强度小于预定或阈值。

10. 发明授权

US6157511A Disk drive with variable-phase servo burst patterns 有权
标题翻译：具有可变相伺服突发模式的磁盘驱动器
公开(公告)号：US6157511A
公开(公告)日：2000-12-05
申请号：US300570
申请日：1999-04-27
申请人： Bruce Liikanen
发明人： Bruce Liikanen
IPC分类号： G11B5/55 , G11B5/596 , G11B23/00
CPC分类号： G11B5/59683 , G11B5/596 , G11B5/59655 , G11B5/59688 , G11B23/0007 , G11B5/5526
摘要： A disk which incorporates a variable-phase servo burst pattern is disclosed. The disk has servo information thereon. The servo information includes a first servo burst pattern written on a first track and a second servo burst pattern written on a second track. Both the first servo burst pattern and the second servo burst pattern have a plurality of transition pulses. The corresponding transition pulses of the first servo burst pattern and the second servo burst pattern are 180 degrees out of phase from one another. Furthermore, a method of writing servo-information which is used to position a magneto-resistive head on a centerline of a track is also disclosed. The method includes the steps of (1) writing a first servo burst pattern on a first track, the first servo burst pattern having a plurality of transition pulses; and (2) writing a second servo burst pattern on a second track, the second servo burst pattern having a plurality of transition pulses, wherein the corresponding transition pulses of the first servo burst pattern and the second servo burst pattern are 180 degrees out of phase from one another.
摘要翻译：公开了一种包含可变相伺服突发图案的盘。盘上有伺服信息。伺服信息包括写在第一轨道上的第一伺服脉冲串模式和写在第二磁道上的第二伺服脉冲串模式。第一伺服脉冲串模式和第二伺服脉冲串模式都具有多个转换脉冲。第一伺服突发图案和第二伺服突发图案的相应转换脉冲彼此相位相差180度。此外，还公开了一种用于将磁阻头定位在轨道的中心线上的伺服信息的写入方法。该方法包括以下步骤：（1）在第一磁道上写入第一伺服脉冲串模式，第一伺服脉冲串模式具有多个转换脉冲; 以及（2）在第二磁道上写入第二伺服脉冲串模式，所述第二伺服脉冲串模式具有多个转换脉冲，其中所述第一伺服脉冲串模式和所述第二伺服脉冲串模式的相应转换脉冲是相位相差180度从彼此。

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