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107 条记录 (耗时 0.021 秒)

    Alternative DC-burst servo pattern for perpendicular recording
    1.
    发明授权
    Alternative DC-burst servo pattern for perpendicular recording 失效
    用于垂直记录的备用直流脉冲串伺服模式

    公开(公告)号：US07474493B2

    公开(公告)日：2009-01-06

    申请号：US10701593

    申请日：2003-11-06

    申请人： Takehiko Hamaguchi ,  Hideaki Maeda ,  Kazuhisa Shishida ,  Yasutaka Nishida

    发明人： Takehiko Hamaguchi ,  Hideaki Maeda ,  Kazuhisa Shishida ,  Yasutaka Nishida

    IPC分类号： G11B5/596

    CPC分类号： G11B5/59655

    摘要： The invention provides a servo pattern that is stable for long time, easily writable, and excellent in S/N. DC-signal area included in a burst area of a servo pattern comprises combination of positive and negative DC-signals, low-density dummy bit, or pattern having phases that are deviated each other so that the sum of magnetization of the burst area of the servo pattern is equalized to 0.

    摘要翻译： 本发明提供了长时间稳定，易于写入且S / N优异的伺服图形。 包括在伺服模式的脉冲串区域中的DC信号区域包括正和负DC信号的组合，低密度虚拟位或具有彼此偏离的相位的模式，使得 伺服模式等于0。

    Method of servo writing for magnetic recording system, magnetic recording system
    2.
    发明授权
    Method of servo writing for magnetic recording system, magnetic recording system 失效
    磁记录系统伺服写入方法，磁记录系统

    公开(公告)号：US07436611B2

    公开(公告)日：2008-10-14

    申请号：US11377367

    申请日：2006-03-17

    申请人： Yasutaka Nishida ,  Takehiko Hamaguchi ,  Hideki Sawaguchi ,  Hisashi Takano

    发明人： Yasutaka Nishida ,  Takehiko Hamaguchi ,  Hideki Sawaguchi ,  Hisashi Takano

    IPC分类号： G11B5/09 ,  G11B5/596

    CPC分类号： G11B5/59655 ,  G11B5/59688

    摘要： In a method of servo writing of a magnetic recording system and the magnetic recording system, the signal is recorded in a dummy area with a higher recording density than the burst signal. Also, the maximum bit length of the burst area is shortened as compared with the maximum bit length of the data area. A servo control method for perpendicular recording similar to that for longitudinal recording can be used to reduce the development cost. The anti-signal decay performance is also improved. Further, since the variations of the burst signal along the track width is suppressed, the positioning accuracy is improved. These effects combine to produce a reliable magnetic recording system of large capacity.

    摘要翻译： 在磁记录系统和磁记录系统的伺服写入的方法中，该信号被记录在具有比突发信号更高的记录密度的虚拟区域中。 此外，与数据区域的最大位长度相比，突发区域的最大位长度被缩短。 可以使用与纵向记录类似的垂直记录的伺服控制方法来降低开发成本。 反信号衰减性能也得到提高。 此外，由于抑制了沿着磁道宽度的突发信号的变化，因此提高了定位精度。 这些效应相结合，产生了可靠的大容量磁记录系统。

    Magnetic disk apparatus having an adjustable mechanism to compensate write or heat element for off-tracking position with yaw angle
    5.
    发明授权
    Magnetic disk apparatus having an adjustable mechanism to compensate write or heat element for off-tracking position with yaw angle 失效
    具有可调节机构的磁盘装置，用于补偿具有偏航角的偏离跟踪位置的写入或加热元件

    公开(公告)号：US07545595B2

    公开(公告)日：2009-06-09

    申请号：US11354912

    申请日：2006-02-16

    申请人： Takehiko Hamaguchi ,  Atsushi Nakamura ,  Yasutaka Nishida ,  Masafumi Mochizuki ,  Hideki Sawaguchi

    发明人： Takehiko Hamaguchi ,  Atsushi Nakamura ,  Yasutaka Nishida ,  Masafumi Mochizuki ,  Hideki Sawaguchi

    IPC分类号： G11B5/02

    CPC分类号： G11B5/6005 ,  G11B5/012 ,  G11B5/105 ,  G11B5/127 ,  G11B5/1272 ,  G11B5/2654 ,  G11B5/4886 ,  G11B5/56 ,  G11B2005/001 ,  G11B2005/0021

    摘要： A magnetic disk apparatus including: a disk holding data as magnetic information on a magnetic recording film; a head to perform writing and reading of the magnetic information; a rotary actuator to move the head in a radial direction of the disk; plural heat elements in the head to locally heat the disk; a write element in the head to apply a magnetic field to the disk; and means for selecting at least one heat element from the plural heat elements, wherein the means for selecting the heat element selects at least one heat element from the plural heat elements so as to bring a center line of an area heated by the heat element and a center line of the position of the magnetic field generated by the write element into approximate correspondence, in correspondence with a relative angle between the head and a direction of movement of the disk.

    摘要翻译： 一种磁盘装置，包括：磁盘，其将数据作为磁性信息保存在磁记录膜上; 执行写入和读取磁信息的头部; 旋转致动器，用于沿着盘的径向方向移动头部; 头部中的多个热元件以局部加热盘; 磁头中的一个写元件将磁场施加到磁盘上; 以及用于从所述多个加热元件中选择至少一个加热元件的装置，其中用于选择所述加热元件的装置从所述多个加热元件中选择至少一个加热元件，以使得由所述加热元件加热的区域的中心线，以及 由写入元件产生的磁场的位置的中心线对应于磁头与磁盘的移动方向之间的相对角度相对应。

    Adjacent track position detectable information storage apparatus
    7.
    发明授权
    Adjacent track position detectable information storage apparatus 失效
    相邻轨道位置可检测信息存储装置

    公开(公告)号：US06327112B1

    公开(公告)日：2001-12-04

    申请号：US09227078

    申请日：1999-01-05

    申请人： Hiroshi Ide ,  Futoshi Tomiyama ,  Yasutaka Nishida ,  Takehiko Hamaguchi ,  Hisashi Takano ,  Yohji Maruyama ,  Atsushi Nakamura ,  Hideki Sawaguchi

    发明人： Hiroshi Ide ,  Futoshi Tomiyama ,  Yasutaka Nishida ,  Takehiko Hamaguchi ,  Hisashi Takano ,  Yohji Maruyama ,  Atsushi Nakamura ,  Hideki Sawaguchi

    IPC分类号： G11B5596

    CPC分类号： G11B19/04 ,  G11B5/596

    摘要： An information storage apparatus has a disk medium setting data recording areas along a plurality of tracks concentrically arranged, a head for recording and reproducing data on tracks of the disk medium, an actuator for moving the head to a desired track among the plurality of tracks. Also included is an electric circuit for controlling recording and reproducing in response to detecting the distance from a recorded magnetization pattern on an adjacent track in the radial direction by detecting previously recorded signals on adjacent tracks while data recording. Even if the track density is increased, the upper limit of a threshold value of a function for preventing off-track recording of the information storage apparatus can be increased and a high track density of the information storage apparatus can be easily realized.

    摘要翻译： 信息存储装置具有盘介质，沿着同心配置的多个轨道设置数据记录区域，用于在盘介质的轨道上记录和再现数据的磁头，用于将磁头移动到多个磁道中的期望磁道的致动器。 还包括用于响应于通过在数据记录期间检测相邻轨道上的先前记录的信号来检测与径向上的相邻轨道上的记录磁化模式的距离来控制记录和再现的电路。 即使磁道密度增加，也可以增加用于防止信息存储装置的越野记录的功能的阈值的上限，并且可以容易地实现信息存储装置的高磁道密度。