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1.发明申请NULL SERVO PATTERN FOR BIT-PATTERNED MEDIA 有权用于比特图形媒体的空服务模式（NULL SERVO PATTERN FOR BIT-PATTERNED MEDIA）公开(公告)号：US20090067090A1
公开(公告)日：2009-03-12
申请号：US11854013
申请日：2007-09-12
IPC分类号： G11B5/82
CPC分类号： G11B5/82 , B82Y10/00 , G11B5/59688 , G11B5/743 , G11B5/855
摘要： A patterned recording media comprises a segment and a null pattern formed in the segment. The segment comprises first and second rows of discrete magnetic elements separated by a non-magnetic material, and a row of non-magnetic material positioned between the first and second rows. The null pattern comprises consecutive groups of the discrete magnetic elements in the first and second rows of the segment. Each group in the first row has a magnetic polarity that is opposite the magnetic polarity of adjoining groups in the first row. Each group in the second row has a magnetic polarity that is opposite the magnetic polarity of adjoining groups in the second row.
摘要翻译： 图案化记录介质包括在该段中形成的段和空模式。 该段包括由非磁性材料隔开的第一和第二排离散磁性元件，以及位于第一和第二行之间的一排非磁性材料。 空模式包括段的第一和第二行中的分立磁元件的连续组。 第一行中的每个组具有与第一行中相邻组的磁极性相反的磁极性。 第二排中的每个组具有与第二行中相邻组的磁极性相反的磁极性。
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公开(公告)号：US07706092B2
公开(公告)日：2010-04-27
申请号：US11854013
申请日：2007-09-12
IPC分类号： G11B5/09
CPC分类号： G11B5/82 , B82Y10/00 , G11B5/59688 , G11B5/743 , G11B5/855
摘要： A patterned recording media comprises a segment and a null pattern formed in the segment. The segment comprises first and second rows of discrete magnetic elements separated by a non-magnetic material, and a row of non-magnetic material positioned between the first and second rows. The null pattern comprises consecutive groups of the discrete magnetic elements in the first and second rows of the segment. Each group in the first row has a magnetic polarity that is opposite the magnetic polarity of adjoining groups in the first row. Each group in the second row has a magnetic polarity that is opposite the magnetic polarity of adjoining groups in the second row.
摘要翻译： 图案化记录介质包括在该段中形成的段和空模式。 该段包括由非磁性材料隔开的第一和第二排离散磁性元件，以及位于第一和第二行之间的一排非磁性材料。 空模式包括该段的第一和第二行中的分立磁元件的连续组。 第一行中的每个组具有与第一行中相邻组的磁极性相反的磁极性。 第二排中的每个组具有与第二行中相邻组的磁极性相反的磁极性。
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公开(公告)号：US08737001B2
公开(公告)日：2014-05-27
申请号：US12882773
申请日：2010-09-15
CPC分类号： G11B5/59655 , B82Y10/00 , G11B5/746 , G11B5/82
摘要： A magnetic storage medium comprises a plurality of discrete magnetic elements and first and second adjoining servo sectors. Each of the servo sectors comprises first and second rows of the discrete magnetic elements extending in a track direction. The second row of the discrete magnetic elements are stacked relative to the discrete magnetic elements of the first row in a cross-track direction that is perpendicular to the track direction. The discrete magnetic elements of the first servo sector are staggered in the cross-track direction relative to the discrete magnetic elements of the second servo sector.
摘要翻译： 磁存储介质包括多个分立的磁性元件和第一和第二相邻的伺服扇区。 每个伺服扇区包括在轨道方向上延伸的离散磁性元件的第一和第二行。 离散磁性元件的第二排相对于垂直于磁道方向的交叉磁道方向相对于第一行的离散磁性元件堆叠。 第一伺服扇区的离散磁性元件相对于第二伺服扇区的离散磁性元件在交叉磁道方向交错。
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公开(公告)号：US20120063027A1
公开(公告)日：2012-03-15
申请号：US12882773
申请日：2010-09-15
CPC分类号： G11B5/59655 , B82Y10/00 , G11B5/746 , G11B5/82
摘要： A magnetic storage medium comprises a plurality of discrete magnetic elements and first and second adjoining servo sectors. Each of the servo sectors comprises first and second rows of the discrete magnetic elements extending in a track direction. The second row of the discrete magnetic elements are stacked relative to the discrete magnetic elements of the first row in a cross-track direction that is perpendicular to the track direction. The discrete magnetic elements of the first servo sector are staggered in the cross-track direction relative to the discrete magnetic elements of the second servo sector.
摘要翻译： 磁存储介质包括多个分立的磁性元件和第一和第二相邻的伺服扇区。 每个伺服扇区包括在轨道方向上延伸的离散磁性元件的第一和第二行。 离散磁性元件的第二排相对于垂直于磁道方向的交叉磁道方向相对于第一行的离散磁性元件堆叠。 第一伺服扇区的离散磁性元件相对于第二伺服扇区的离散磁性元件在交叉磁道方向交错。
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公开(公告)号：US06490111B1
公开(公告)日：2002-12-03
申请号：US09550876
申请日：2000-04-17
申请人： Alexei H. Sacks
发明人： Alexei H. Sacks
IPC分类号： G11B5596
CPC分类号： G11B5/59633
摘要： A method of refreshing magnetization of a servo pattern in a magnetic medium within a disc drive is provided, wherein the servo pattern is at least partially defined by physical features of the medium. The method includes reading servo information through a transducer in the disc drive from a first portion of the servo pattern. The transducer is positioned at a radial position relative to the medium based on the servo information. The magnetization of a second portion of the servo pattern is then refreshed at the radial position with a magnetic field generated by the transducer.
摘要翻译： 提供了一种刷新磁盘驱动器内的磁介质中的伺服图形的磁化的方法，其中伺服图案至少部分地由介质的物理特征限定。 该方法包括从伺服模式的第一部分通过盘驱动器中的换能器读取伺服信息。 换能器基于伺服信息被定位在相对于介质的径向位置处。 然后，伺服图案的第二部分的磁化在具有由换能器产生的磁场的径向位置处被刷新。
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公开(公告)号：US06411459B1
公开(公告)日：2002-06-25
申请号：US09504192
申请日：2000-02-15
申请人： Karl A. Belser , Alexei H. Sacks
发明人： Karl A. Belser , Alexei H. Sacks
IPC分类号： G11B2102
CPC分类号： G11B5/59633
摘要： A method of writing servo information for hard disc drives, and disc drives built according to the method are disclosed. The method includes writing position reference information on a reference disc surface prior to mounting a disc assembly into a hard disc drive. Once the disc assembly is mounted in the disc drive, servo information is written onto the disc surfaces based upon the pre-written position reference information. Subsequently, the position reference information can be erased or written over by user data.
摘要翻译： 公开了一种写入用于硬盘驱动器的伺服信息的方法，以及根据该方法构建的盘驱动器。 该方法包括在将盘组件安装到硬盘驱动器之前将位置参考信息写在参考盘表面上。 一旦盘组件安装在盘驱动器中，基于预先写入的位置参考信息将伺服信息写入到盘表面上。 随后，位置参考信息可以由用户数据擦除或写入。
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7.发明授权Method and apparatus utilizing field ratioing demodulation techniques for a null-type servo pattern 有权利用空比型伺服模式的场比解调技术的方法和装置公开(公告)号：US06195220B1
公开(公告)日：2001-02-27
申请号：US09268118
申请日：1999-03-15
申请人： Timothy F. Ellis , Alexei H. Sacks
发明人： Timothy F. Ellis , Alexei H. Sacks
IPC分类号： G11B5596
CPC分类号： G11B21/081 , G11B5/5552 , G11B5/59655
摘要： A method of generating a position error estimate generates a phase field signal and a position error field signal. A set of operations is performed on the phase field signal and the same set of operations is performed on the position error field signal. The result obtained by performing the set of operations on the position error field signal is divided by the results obtained by performing the set of operations on the phase field signal. The result of the division is the position error estimate. In addition, a demodulation circuit is provided that utilizes field ratioing.
摘要翻译： 产生位置误差估计的方法产生相位场信号和位置误差场信号。 对相位场信号执行一组操作，并对位置误差场信号执行相同的一组操作。 通过对位置误差场信号执行一组操作而获得的结果除以通过对相位场信号执行一组操作获得的结果。 除法的结果是位置误差估计。 此外，提供利用场比的解调电路。
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8.发明授权公开(公告)号：US06510752B1
公开(公告)日：2003-01-28
申请号：US09426349
申请日：1999-10-25
IPC分类号： G01N1900
CPC分类号： G11B5/5552
摘要： A method and apparatus are provided for testing a microactuator that forms part of a suspension assembly in a disc drive. The method and apparatus test the microactuator before placing the suspension assembly in a disc drive. In the invention, the head is positioned over a track on a disc based in part on servo information read from the disc. At least one input signal is then applied to at last one microactuator on the suspension assembly. Servo information is then read from the disc to determine a change in the position of the head. By comparing the change in the position of the head to the input signal applied to the microactuator, a performance characteristic of a microactuator can be determined.
摘要翻译： 提供了一种用于测试形成盘驱动器中的悬挂组件的一部分的微致动器的方法和装置。 该方法和装置在将悬架组件放置在盘驱动器中之前测试微型致动器。 在本发明中，头部部分地基于从盘读取的伺服信息，将磁头定位在盘上的轨道上。 然后至少一个输入信号施加到悬架组件上的最后一个微致动器。 然后从盘读取伺服信息以确定头部位置的变化。 通过比较头部的位置与施加到微致动器的输入信号的变化，可以确定微致动器的性能特性。
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公开(公告)号：US06249392B1
公开(公告)日：2001-06-19
申请号：US09078179
申请日：1998-05-13
申请人： Alexei H. Sacks , Timothy F. Ellis
发明人： Alexei H. Sacks , Timothy F. Ellis
IPC分类号： G11B2736
CPC分类号： G11B20/10203 , G11B5/5534 , G11B5/59611 , G11B5/59688 , G11B19/04 , G11B27/36 , G11B2005/0013 , G11B2005/0016
摘要： A method and apparatus detects pulse asymmetries in a read signal of a data storage device. The read signal is rectified through multiplication with a rectification signal to produce a product signal. The product signal is integrated to produce integrands indicative of pulse asymmetry. In some embodiments of the present invention, the integrands are compared against a baseline value to determine a performance characteristic of a read head in the data storage device.
摘要翻译： 一种方法和装置检测数据存储装置的读取信号中的脉冲不对称性。 读取信号通过与整流信号相乘来整流以产生乘积信号。 产品信号被集成以产生指示脉冲不对称的被占据。 在本发明的一些实施例中，将被积函数与基线值进行比较以确定数据存储设备中的读头的性能特性。
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公开(公告)号：US06879458B2
公开(公告)日：2005-04-12
申请号：US10304924
申请日：2002-11-26
申请人： Alexei H. Sacks , Li-Ping Wang , Donald E. Curtiss
发明人： Alexei H. Sacks , Li-Ping Wang , Donald E. Curtiss
CPC分类号： G11B5/00 , G11B5/5534 , G11B5/59633
摘要： A method for thermally writing a magnetic servo pattern on a magnetic disc medium prior to assembling the medium in a disc drive is provided in which the medium is first magnetized in a uniform magnetization direction. A plurality of magnetic domains are then thermally written on the medium, one magnetic domain at a time, by individually heating each magnetic domain with a light beam while exposing the magnetic domain to a magnetic field. The magnetic field has an orientation that is opposite to the uniform magnetization direction. The light beam forms an illumination pattern on the medium having a shape that at least partially defines a boundary of each magnetic domain.
摘要翻译： 提供了在将介质组装在盘驱动器中之前将磁性伺服图形热写入磁盘介质上的方法，其中介质首先以均匀的磁化方向被磁化。 然后通过在将磁畴暴露于磁场的同时用光束单独加热每个磁畴，将多个磁畴一次热写入介质一个磁畴。 磁场具有与均匀磁化方向相反的取向。 光束在具有至少部分地限定每个磁畴的边界的形状的介质上形成照明图案。
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