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    Dynamically adjustable head disk spacing slider using thermal expansion
    1.
    发明授权
    Dynamically adjustable head disk spacing slider using thermal expansion 有权
    动态可调头盘间距滑块采用热膨胀

    公开(公告)号：US07388726B1

    公开(公告)日：2008-06-17

    申请号：US11503354

    申请日：2006-08-10

    Applicant: Robert McKenzie ,  Thao Nguyen ,  Xiaokun Chew ,  Gang Herbert Lin ,  Jack Tsai ,  Bruce Schardt ,  Steven Marshall

    Inventor： Robert McKenzie ,  Thao Nguyen ,  Xiaokun Chew ,  Gang Herbert Lin ,  Jack Tsai ,  Bruce Schardt ,  Steven Marshall

    IPC: G11B21/02

    CPC classification number: G11B5/6064 ,  G11B5/607

    Abstract: A disk drive includes a slider assembly and a controller that directs current to the slider assembly to dynamically adjust the head-to-disk spacing. In one embodiment, the slider assembly includes a write element having a first end, a second end and an intermediate section, a conductor that is connected to the intermediate section. In this embodiment, the controller directs electrical current through the conductor to heat the write element without writing data to a storage disk. The electrical current can be directed through the conductor at any time prior to data transfer or during data transfer. Heating the write element causes a deformation of the slider assembly to decrease the head-to-disk spacing. In another embodiment, the slider assembly includes a separate slider deformer. Electrical current is selectively directed to the slider deformer to cause a deformation of the slider assembly to obtain a desired head-to-disk spacing. The slider deformer can include electrically conductive material or can be a piezoelectric element. Further, the slider deformer can be serpentine-shaped or substantially planar in shape.

    Abstract translation: 磁盘驱动器包括滑块组件和控制器，其将电流引导到滑块组件以动态地调节磁头到磁盘的间距。 在一个实施例中，滑块组件包括具有第一端，第二端和中间部分的写入元件，连接到中间部分的导体。 在本实施例中，控制器引导电流通过导体加热写入元件而不将数据写入存储盘。 在数据传输之前或数据传输过程中，电流可以随时被导入导体。 对写入元件进行加热会导致滑块组件的变形，从而减小磁头与磁盘的间距。 在另一个实施例中，滑块组件包括单独的滑块变形器。 选择性地将电流导向滑块变形器以引起滑块组件的变形以获得期望的头对盘间距。 滑块变形器可以包括导电材料或者可以是压电元件。 此外，滑块变形器的形状可以是蛇形形状或基本上平面的。

    Actuation efficiency based contact detection
    2.
    发明授权
    Actuation efficiency based contact detection 失效
    基于动作效率的接触检测

    公开(公告)号：US07558015B2

    公开(公告)日：2009-07-07

    申请号：US11693596

    申请日：2007-03-29

    Applicant: Erhard Schreck ,  Rickmer Kose ,  Bruce Schardt ,  Davide Guarisco

    Inventor： Erhard Schreck ,  Rickmer Kose ,  Bruce Schardt ,  Davide Guarisco

    IPC: G11B21/02

    CPC classification number: G11B19/04 ,  G11B5/6005 ,  G11B5/6064

    Abstract: In one example, a method is provided and includes comparing a measured change in spacing between a transducer element and a storage element in response to a fly height control signal with an expected change in spacing for the applied fly height control signal. The method also includes detecting an event condition based on the comparison between the measured change in spacing and the expected change in spacing.

    Abstract translation: 在一个示例中，提供了一种方法，并且包括响应于飞行高度控制信号，比较所测量的换能器元件和存储元件之间的间隔的变化，以及所应用的飞行高度控制信号的间隔的预期变化。 该方法还包括基于所测量的间隔变化与间隔的期望变化之间的比较来检测事件条件。

    Dynamically adjustable head disk spacing slider using thermal expansion
    4.
    发明授权
    Dynamically adjustable head disk spacing slider using thermal expansion 有权
    动态可调头盘间距滑块采用热膨胀

    公开(公告)号：US07092193B1

    公开(公告)日：2006-08-15

    申请号：US10211671

    申请日：2002-08-02

    Applicant: Robert McKenzie ,  Thao Nguyen ,  Xiaokun Chew ,  Gang Herbert Lin ,  Jack Tsai ,  Bruce Schardt ,  Steven Marshall

    Inventor： Robert McKenzie ,  Thao Nguyen ,  Xiaokun Chew ,  Gang Herbert Lin ,  Jack Tsai ,  Bruce Schardt ,  Steven Marshall

    IPC: G11B21/02

    CPC classification number: G11B5/60 ,  G11B5/6064

    Abstract: A disk drive includes a slider assembly and a controller that directs current to the slider assembly to dynamically adjust the head-to-disk spacing. In one embodiment, the slider assembly includes a write element having a first end, a second end and an intermediate section, a conductor that is connected to the intermediate section. In this embodiment, the controller directs electrical current through the conductor to heat the write element without writing data to a storage disk. The electrical current can be directed through the conductor at any time prior to data transfer or during data transfer. Heating the write element causes a deformation of the slider assembly to decrease the head-to-disk spacing. In another embodiment, the slider assembly includes a separate slider deformer. Electrical current is selectively directed to the slider deformer to cause a deformation of the slider assembly to obtain a desired head-to-disk spacing. The slider deformer can include electrically conductive material or can be a piezoelectric element. Further, the slider deformer can be serpentine-shaped or substantially planar in shape.

    Abstract translation: 磁盘驱动器包括滑块组件和控制器，其将电流引导到滑块组件以动态地调节磁头到磁盘的间距。 在一个实施例中，滑块组件包括具有第一端，第二端和中间部分的写入元件，连接到中间部分的导体。 在本实施例中，控制器引导电流通过导体加热写入元件而不将数据写入存储盘。 在数据传输之前或数据传输过程中，电流可以随时被导入导体。 对写入元件进行加热会导致滑块组件的变形，从而减小磁头与磁盘的间距。 在另一个实施例中，滑块组件包括单独的滑块变形器。 选择性地将电流导向滑块变形器以引起滑块组件的变形以获得期望的头对盘间距。 滑块变形器可以包括导电材料或者可以是压电元件。 此外，滑块变形器的形状可以是蛇形形状或基本上平面的。

    Method and apparatus for media thermal decay measurement in a disk drive
    5.
    发明授权
    Method and apparatus for media thermal decay measurement in a disk drive 失效
    磁盘驱动器中介质热衰减测量的方法和装置

    公开(公告)号：US06987630B1

    公开(公告)日：2006-01-17

    申请号：US10366582

    申请日：2003-02-12

    Applicant: Bill Higgins ,  Bruce Schardt

    Inventor： Bill Higgins ,  Bruce Schardt

    IPC: G11B27/36 ,  G11B5/02

    CPC classification number: G11B27/36

    Abstract: A method and apparatus is provided for measuring a media thermal decay rate for a disk in a disk drive. In one embodiment, reference patterns are written in a plurality of reference sectors on a test track of a disk surface. A thermal decay measurement duration is predetermined. After at least two decades of time longer than the predetermined thermal decay measurement duration have passed since writing the reference patterns in the plurality of reference sectors, sector-under-test patterns are written in a plurality of sectors-under-test, wherein the sectors-under-test and the reference sectors are written in data sectors and alternate with one another about at least a portion of the test track. The mean square error is measured and averaged for the reference sectors, and the mean square error is measured and averaged for the sectors under test. The averaged mean square error for the reference sectors and the averaged mean square error for the sectors-under-test are used to calculate the media thermal decay rate. In another embodiment, information associated with the amplitude of the readback signal is used instead of, or in addition to, the mean square error of the readback signal to calculate the media thermal decay rate.

    Abstract translation: 提供了一种用于测量磁盘驱动器中的盘的介质热衰减速率的方法和装置。 在一个实施例中，参考图案被写在盘表面的测试轨道上的多个参考扇区中。 热衰减测量持续时间是预先确定的。 在比通过在多个参考扇区中写入参考图案之后经过预定的热衰减测量持续时间长至少二十年的时间之后，在多个被测试的扇区中写入扇区测试下的模式，其中扇区 测试和参考扇区被写入数据扇区，并相互交替关于测试轨迹的至少一部分。 对参考扇区测量和平均均方根误差，并测量平均误差，并对被测扇区进行平均。 用于参考扇区的平均均方误差和被测扇区的平均均方误差用于计算介质热衰减率。 在另一个实施例中，使用与回读信号的幅度相关联的信息来代替或补充回读信号的均方误差来计算媒体热衰减率。

    Disk drive that refreshes data on portions of a disk based on a number of write operations thereto
    6.
    发明授权
    Disk drive that refreshes data on portions of a disk based on a number of write operations thereto 有权
    磁盘驱动器，其基于对其的写入操作的数量来刷新磁盘的部分上的数据

    公开(公告)号：US07345837B1

    公开(公告)日：2008-03-18

    申请号：US11184273

    申请日：2005-07-19

    Applicant: Erhard Schreck ,  Donald Brunnett ,  Hung V. Nguyen ,  Bruce Schardt ,  Andrew Vogan

    Inventor： Erhard Schreck ,  Donald Brunnett ,  Hung V. Nguyen ,  Bruce Schardt ,  Andrew Vogan

    IPC: G11B27/36 ,  G11B5/09

    CPC classification number: G11B5/09

    Abstract: A disk drive includes a rotatable data storage disk, a transducer, an actuator, and a controller. The transducer is configured to read and write data on the disk. The actuator is configured to position the transducer relative to defined portions of the disk. The controller is configured to determine how many times data has been written to the defined portions of the disk. The controller is also configured to refresh data residing at a particular one of the defined portions of the disk when the number of times data has been written to the particular defined portion of the disk satisfies a threshold value.

    Abstract translation: 磁盘驱动器包括可旋转数据存储盘，换能器，致动器和控制器。 传感器配置为在磁盘上读取和写入数据。 致动器被配置成相对于盘的限定部分定位换能器。 控制器被配置为确定数据被写入磁盘的定义部分的次数。 当数据已被写入盘的特定定义部分的次数满足阈值时，控制器还被配置为刷新驻留在盘的特定一个定义部分的数据。

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