利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

92 条记录 (耗时 0.029 秒)

    Method of determining side track erasure in a disk drive
    21.
    发明授权
    Method of determining side track erasure in a disk drive 有权
    确定磁盘驱动器中的侧轨道擦除的方法

    公开(公告)号：US07170700B1

    公开(公告)日：2007-01-30

    申请号：US10125657

    申请日：2002-04-18

    申请人： Gang H. Lin ,  Erhard Schreck ,  Kezhao Zhang ,  Don Brunnett ,  Duc Banh ,  Kurt Rusnak ,  Jingbo Yu ,  Suet Teo ,  Nick Warner ,  John Vicars

    发明人： Gang H. Lin ,  Erhard Schreck ,  Kezhao Zhang ,  Don Brunnett ,  Duc Banh ,  Kurt Rusnak ,  Jingbo Yu ,  Suet Teo ,  Nick Warner ,  John Vicars

    IPC分类号： G11B27/36 ,  G11B5/03

    CPC分类号： G11B5/024 ,  G11B20/182 ,  G11B27/36 ,  G11B2220/2516

    摘要： A method of determining side track erasure in a disk drive having a disk and a transducer. A target track and one or more side tracks proximate to the target track on the disk are selected, and recording parameters for recording signals on the target track and each side track with the transducer are selected. Thereafter, signals are recorded on each side track and then signals are recorded on the target track multiple times. A reduction in the integrity of the recorded signals on each side track due to recording signals on the target track multiple times is detected, and the detected reduction in the integrity of the recorded signals on each side track represents the amount of the erasure of the recorded signals on the side track. Recording parameters are changed based on the signal integrity reduction to minimize side track erasure.

    摘要翻译： 一种在具有盘和换能器的盘驱动器中确定侧轨道擦除的方法。 选择目标轨道和靠近盘上的目标轨道的一个或多个侧轨道，并且选择用于使用换能器在目标轨道和每个侧轨上记录信号的记录参数。 此后，信号被记录在每个侧轨道上，然后将信号多次记录在目标轨道上。 检测到由于在目标轨道上多次记录信号而导致的每个侧轨道上的记录信号的完整性的降低，并且检测到的每个侧轨道上记录信号的完整性的降低表示记录的擦除量 侧轨上的信号。 记录参数根据信号完整性降低而改变，以尽量减少侧轨跟踪擦除。

    Disk-synchronized loading/unloading of magnetic head
    22.
    发明授权
    Disk-synchronized loading/unloading of magnetic head 有权
    磁头同步加载/卸载磁头

    公开(公告)号：US08767337B2

    公开(公告)日：2014-07-01

    申请号：US11736441

    申请日：2007-04-17

    申请人： Craig Smith ,  Bernhard Hiller ,  Stan Shepherd ,  Erhard Schreck

    发明人： Craig Smith ,  Bernhard Hiller ,  Stan Shepherd ,  Erhard Schreck

    IPC分类号： G11B5/596

    CPC分类号： G11B21/12

    摘要： Systems and methods from loading/unloading a data head for a disk drive provide for more efficient use of disk space. A method of loading/unloading a data head for a disk drive comprises determining a disk phase of a spinning disk arrangement, determining a loading/unloading position based on the disk phase, and loading or unloading the data head on or from, respectively, the spinning disk arrangement based on the determined disk phase. The determining a disk phase may be based on zero crossing of voltages for a three-phase motor associated with the spinning disk arrangement.

    摘要翻译： 从磁盘驱动器加载/卸载数据头的系统和方法可以更有效地使用磁盘空间。 一种用于加载/卸载用于磁盘驱动器的数据头的方法包括确定旋转磁盘布置的磁盘相位，基于磁盘相位确定加载/卸载位置，以及分别在或从其分别加载或卸载数据磁头 基于确定的磁盘相位旋转磁盘布置。 确定盘相位可以基于与旋转盘装置相关联的三相电动机的电压的过零点。

    Printing magnetic pattern onto disk
    23.
    发明授权
    Printing magnetic pattern onto disk 有权
    将磁性图案打印到磁盘上

    公开(公告)号：US08649249B1

    公开(公告)日：2014-02-11

    申请号：US11220068

    申请日：2005-08-31

    申请人： Erhard Schreck ,  David Fowler ,  Michael Mallary

    发明人： Erhard Schreck ,  David Fowler ,  Michael Mallary

    IPC分类号： G11B9/00 ,  G11B7/00

    CPC分类号： G11B5/59688 ,  G11B5/59655 ,  G11B5/743 ,  G11B5/855 ,  G11B5/865

    摘要： A novel method and apparatus is provided for printing magnetic patterns using heat assisted magnetic recording (HAMR). The apparatus includes an array of probes that is arranged in a predetermined pattern, such as a servo pattern. The array of probes is brought into contact, or near-contact, with a magnetic recording medium that has been bulk erased substantially along an initialization direction. Each probe is energized so as to heat its respective contacted (or near-contacted) region of the recording medium above a threshold temperature. An external magnetic field is applied to the heated regions in a direction that is substantially opposite from the initialization direction. The strength of the external magnetic field is chosen to be greater than the coercivity of the recording medium at the threshold temperature, but less than the coercivity of the recording medium at room temperature. As a result, only magnetizations in the heated regions become aligned with the external field.

    摘要翻译： 提供了一种使用热辅助磁记录（HAMR）打印磁图案的新颖方法和装置。 该装置包括以预定图案布置的诸如伺服图案的探针阵列。 探针的阵列与已经大体沿着初始化方向被大量擦除的磁记录介质接触或接近接触。 每个探针被通电，以将其各自接触的（或近接触）的区域加热到高于阈值温度。 外部磁场沿与初始化方向大致相反的方向施加到加热区域。 选择外部磁场的强度大于在阈值温度下记录介质的矫顽力，但小于记录介质在室温下的矫顽力。 结果，只有加热区域中的磁化才能与外界对准。

    Tar with write-synchronized laser modulation
    24.
    发明授权
    Tar with write-synchronized laser modulation 有权
    焦点与写同步激光调制

    公开(公告)号：US08570842B1

    公开(公告)日：2013-10-29

    申请号：US13490318

    申请日：2012-06-06

    申请人： Hans J. Richter ,  Erhard Schreck ,  Matteo Staffaroni ,  Barry C. Stipe

    发明人： Hans J. Richter ,  Erhard Schreck ,  Matteo Staffaroni ,  Barry C. Stipe

    IPC分类号： G11B11/00

    CPC分类号： G11B5/314 ,  G11B5/6088 ,  G11B2005/0021

    摘要： Instead of using discontinuous step functions or pulses to drive a laser of a TAR enabled disk drive between on and off, a fixed modulation frequency may be used that alternates between a high and low laser power such that the radiation source is always delivering heat to the magnetic media when writing data to the magnetic disk. The magnetic field of the write pole may be synchronized to the modulation frequency of the radiation source to ensure that the radiation source heats the magnetic media proximate to the write pole above the grain freezing temperature when the Zeeman energy produced by the magnetic field of the write pole exceeds the thermal energy of the magnetic media.

    摘要翻译： 代替使用不连续的步进功能或脉冲来驱动启用和禁用TAR的磁盘驱动器的激光器，可以使用在高和低激光功率之间交替的固定调制频率，使得辐射源总是向 当磁盘写入数据时，磁性媒体。 写入极的磁场可以与辐射源的调制频率同步，以确保辐射源在写入磁极附近产生的塞曼能量加热写入磁极附近的磁性介质在晶粒冻结温度以上 极超过磁介质的热能。

    Magnetic core plasmon antenna with improved coupling efficiency
    29.
    发明申请
    Magnetic core plasmon antenna with improved coupling efficiency 有权
    具有改善耦合效率的磁芯等离子体天线

    公开(公告)号：US20120008229A1

    公开(公告)日：2012-01-12

    申请号：US12803874

    申请日：2010-07-08

    申请人： Yuchen Zhou ,  Tobias Maletzky ,  Xuhui Jin ,  Zhigang Bai ,  Kenichi Takano ,  Erhard Schreck

    发明人： Yuchen Zhou ,  Tobias Maletzky ,  Xuhui Jin ,  Zhigang Bai ,  Kenichi Takano ,  Erhard Schreck

    IPC分类号： G11B5/02 ,  G11B5/127

    CPC分类号： G11B5/314 ,  B82Y20/00 ,  G02B6/1226 ,  G11B5/3163 ,  G11B5/6088 ,  G11B2005/0021

    摘要： A TAMR (Thermal Assisted Magnetic Recording) write head uses the energy of optical-laser generated plasmons in a magnetic core plasmon antenna to locally heat a magnetic recording medium and reduce its coercivity and magnetic anisotropy. To enable the TAMR head to operate most effectively, the maximum gradient and value of the magnetic recording field should be at a point of the magnetic medium that is as close as possible to the point being heated. In addition, the coupling between the optical mode and the plasmon mode should be efficient so that maximum energy is transmitted to the medium. The present invention achieves both these objects by surrounding the magnetic core of a plasmon antenna by a variable thickness plasmon generating layer, whose thinnest and shortest portion is at the ABS end of the TAMR head and whose thickest and longest portion efficiently couples to the optical mode of a waveguide to produce a plasmon.

    摘要翻译： TAMR（热辅助磁记录）写头使用磁芯等离子体天线中的激光产生的等离子体激元的能量来局部加热磁记录介质并降低其矫顽力和磁各向异性。 为了使TAMR头能够最有效地运行，磁记录场的最大梯度和值应当在尽可能接近被加热点的磁介质的一个点处。 另外，光模式和等离子体激元模式之间的耦合应该是有效的，从而将最大能量传输到介质。 本发明通过可变厚度等离子体发生层围绕等离子体激元天线的磁芯来实现这两个目的，其最薄和最短部分在TAMR头的ABS端，并且其最厚和最长部分有效地耦合到光学模式 的波导产生等离子体激元。