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公开(公告)号：US06560168B1
公开(公告)日：2003-05-06
申请号：US09719427
申请日：2000-12-12
申请人： Hideki Saga , Hiroaki Nemoto , Hirofumi Sukeda , Masahiko Takahashi , Kimio Nakamura , Yohji Maruyama , Hiroshi Ide , Takehiko Hamaguchi
发明人： Hideki Saga , Hiroaki Nemoto , Hirofumi Sukeda , Masahiko Takahashi , Kimio Nakamura , Yohji Maruyama , Hiroshi Ide , Takehiko Hamaguchi
IPC分类号： G11B1100
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/00 , G11B5/398 , G11B5/5552 , G11B5/59683 , G11B5/74 , G11B5/82 , G11B11/1053 , G11B11/10532 , G11B11/10541 , G11B11/10554 , G11B11/10576 , G11B11/1058 , G11B2005/0002 , G11B2005/0005 , G11B2005/0016 , G11B2005/0021 , G11B2005/3996
摘要： An information recording apparatus using a recording medium which holds information by reversed magnetic domains on a perpendicular magnetic recording film includes an irradiation unit for applying electromagnetic energy or light onto the recording medium, and a magnetic flux detection unit for detecting magnetic leakage flux emerging from the recording medium, the magnetic flux detection unit being disposed on the same side as the irradiation unit with respect to the recording medium. As a result, both side recording of the recording medium can be conducted.
摘要翻译： 使用记录介质的信息记录装置，其用垂直磁记录膜上的反向磁畴保持信息，包括用于向记录介质施加电磁能或光的照射单元，以及磁通检测单元，用于检测从 记录介质，磁通检测单元相对于记录介质设置在与照射单元相同的一侧。 结果，可以进行记录介质的双面记录。
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公开(公告)号：US06683823B2
公开(公告)日：2004-01-27
申请号：US10320517
申请日：2002-12-17
申请人： Hideki Saga , Hiroaki Nemoto , Hirofumi Sukeda , Masahiko Takahashi , Kimio Nakamura , Yohji Maruyama , Hiroshi Ide , Takehiko Hamaguchi
发明人： Hideki Saga , Hiroaki Nemoto , Hirofumi Sukeda , Masahiko Takahashi , Kimio Nakamura , Yohji Maruyama , Hiroshi Ide , Takehiko Hamaguchi
IPC分类号： G11B700
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/012 , G11B5/09 , G11B2005/0002 , G11B2005/0021 , G11B2005/0029 , G11B2005/3996
摘要： A method for reproducing information on a recording medium includes irradiating electromagnetic energy or light to the recording medium from one side with respect to the recording medium, applying a recording magnetic field to an electromagnetic energy or light irradiated position on the recording medium from the one side of irradiating electromagnetic energy or light, and detecting magnetic leakage flux emerging from the recording medium from the one side of irradiating electromagnetic energy or light.
摘要翻译： 一种用于在记录介质上再现信息的方法包括：从相对于记录介质的一侧向记录介质照射电磁能或光，从记录介质的一侧向记录介质上的电磁能量或光照射位置施加记录磁场 照射电磁能或光，并从照射电磁能或光的一侧检测从记录介质出射的漏磁通。
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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
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。
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公开(公告)号：US20060187578A1
公开(公告)日：2006-08-24
申请号：US11404780
申请日：2006-04-17
申请人： Takehiko Hamaguchi , Atsushi Nakamura , Yasutaka Nishida , Hisashi Takano , Yohji Maruyama , Hiroshi Ide , Hideki Sawaguchi , Futoshi Tomiyama
发明人： Takehiko Hamaguchi , Atsushi Nakamura , Yasutaka Nishida , Hisashi Takano , Yohji Maruyama , Hiroshi Ide , Hideki Sawaguchi , Futoshi Tomiyama
IPC分类号： G11B17/00
CPC分类号： G11B5/012 , G11B5/4886 , G11B27/02
摘要： For the purpose of letting through a magnetic flux which reverses the magnetization of the magnetic layer of the magnetic disk, a write element requires a predetermined sectional area. However, if a cross section of a magnetic pole is structured as the one having a large aspect ratio, the pole becomes less capable of letting the magnetic flux through effectively. This phenomenon brings about a lower limit on the track width of the magnetic poles and the track density cannot be raised. In the present invention, by making the width of the write element larger than the track pitch and securing a write magnetic field strong enough to reverse the magnetization of the magnetic layer, and further by writing while shifting a write head comprising the write element, a magnetic disk drive, of which the track width is narrower than the write element width, and the storage capacity is large, is realized.
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5.发明授权Magnetic disk device having a write head to write by shifting in a radial direction 有权磁盘装置具有通过沿径向移位来写入的写入头公开(公告)号：US07057838B2
公开(公告)日：2006-06-06
申请号：US10407209
申请日：2003-04-07
申请人： Takehiko Hamaguchi , Atsushi Nakamura , Yasutaka Nishida , Hisashi Takano , Yohji Maruyama , Hiroshi Ide , Hideki Sawaguchi , Futoshi Tomiyama
发明人： Takehiko Hamaguchi , Atsushi Nakamura , Yasutaka Nishida , Hisashi Takano , Yohji Maruyama , Hiroshi Ide , Hideki Sawaguchi , Futoshi Tomiyama
IPC分类号： G11B5/02
CPC分类号： G11B5/012 , G11B5/4886 , G11B27/02
摘要： In the present invention, by making the width of the write element larger than the track pitch and securing a write magnetic field strong enough to reverse the magnetization of the magnetic layer, and further by writing while shifting a write head comprising the write element, a magnetic disk drive, of which the track width is narrower than the write element width, and the storage capacity is large, is realized.
摘要翻译： 在本发明中，通过使写入元件的宽度大于轨道间距，并且确保写入磁场足够强以反转磁性层的磁化，并且进一步通过在包括写入元件的写入头的移位的同时进行写入， 磁盘驱动器，其轨道宽度比写入元件宽度窄，并且存储容量大。
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公开(公告)号：US07443625B2
公开(公告)日：2008-10-28
申请号：US11404780
申请日：2006-04-17
申请人： Takehiko Hamaguchi , Atsushi Nakamura , Yasutaka Nishida , Hisashi Takano , Yohji Maruyama , Hiroshi Ide , Hideki Sawaguchi , Futoshi Tomiyama
发明人： Takehiko Hamaguchi , Atsushi Nakamura , Yasutaka Nishida , Hisashi Takano , Yohji Maruyama , Hiroshi Ide , Hideki Sawaguchi , Futoshi Tomiyama
IPC分类号： G11B5/02
CPC分类号： G11B5/012 , G11B5/4886 , G11B27/02
摘要： In the present invention, by making the width of the write element larger than the track pitch and securing a write magnetic field strong enough to reverse the magnetization of the magnetic layer, and further by writing while shifting a write head comprising the write element, a magnetic disk drive, of which the track width is narrower than the write element width, and the storage capacity is large, is realized.
摘要翻译： 在本发明中，通过使写入元件的宽度大于轨道间距，并且确保写入磁场足够强以反转磁性层的磁化，并且进一步通过在包括写入元件的写入头的移位的同时进行写入， 磁盘驱动器，其轨道宽度比写入元件宽度窄，并且存储容量大。
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公开(公告)号：US06310741B1
公开(公告)日：2001-10-30
申请号：US09225972
申请日：1999-01-05
申请人： Yasutaka Nishida , Takehiko Hamaguchi , Hisashi Takano , Hiroshi Ide , Hideki Sawaguchi , Futoshi Tomiyama
发明人： Yasutaka Nishida , Takehiko Hamaguchi , Hisashi Takano , Hiroshi Ide , Hideki Sawaguchi , Futoshi Tomiyama
IPC分类号： G11B509
摘要： When the amount of position error PE of a magnetic head meets the condition of Ewf>PE>=Eww for two threshold values Ewf and Eww meeting Ewf>Eww, the track is registered in the track information table as a track requiring rewrite and the tracks on both sides neighboring to the track are temporarily write-inhibited. The data of the track is rewritten on another track later so as to maintain the data. By doing this, the offtrack of the recording track can be made smaller without sacrifice of the access speed and the occurrence probability of write fault can be reduced. Furthermore, the reliability of a magnetic disk apparatus can be improved.
摘要翻译： 当磁头的位置误差PE的数量满足Ewf> PE> = Eww的两个阈值Ewf和Eww满足Ewf> Eww的条件时，轨道被记录在轨道信息表中作为需要重写的轨道，并且轨道 在与轨道相邻的两侧临时禁止写入。 轨道的数据稍后被重写在另一个轨道上，以便保持数据。这样做，可以使得记录轨道的远距离更小，而不牺牲访问速度，并且可以减少写入故障的发生概率。 此外，可以提高磁盘装置的可靠性。
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公开(公告)号：US20080192379A1
公开(公告)日：2008-08-14
申请号：US12011284
申请日：2008-01-24
申请人： Masayuki Kurita , Hideaki Tanaka , Noriaki Satoh , Toyomi Ohsawa , Toshiya Shiramatsu , Atsushi Yatagai , Satoshi Ohki , Hiroshi Ide , Hidekazu Kohira , Takehiko Hamaguchi
发明人： Masayuki Kurita , Hideaki Tanaka , Noriaki Satoh , Toyomi Ohsawa , Toshiya Shiramatsu , Atsushi Yatagai , Satoshi Ohki , Hiroshi Ide , Hidekazu Kohira , Takehiko Hamaguchi
CPC分类号： G11B5/455 , G11B5/3133 , G11B5/6029 , G11B5/607 , G11B5/6076 , Y10T29/49004
摘要： Embodiments of the present invention provide a process that monitors a magnetic playback signal while gradually increasing an electricity supply amount for a heater to thereby determine contact between a magnetic head slider and a magnetic disk medium. According to one embodiment, after components for configuring a magnetic recording/playback portion are assembled into a housing, magnetic information is played back on a specific track of a magnetic disk medium by using a playback element while gradually increasing an electricity supply amount for a heater of a magnetic head slider. An amplitude of a playback signal is measured at a plurality of portions along a circumferential direction of the track. Contact between the magnetic head slider and the magnetic disk medium is detected in accordance with an increase in variation in the measured amplitude. Then, a value obtained by subtracting an predetermined value of an electricity amount from an electricity amount in the event of detection of the contact is stored (set) as an appropriate electricity amount for the magnetic head slider into a storage portion.
摘要翻译： 本发明的实施例提供了一种监视磁回放信号的过程，同时逐渐增加用于加热器的电力供应量，从而确定磁头滑块和磁盘介质之间的接触。 根据一个实施例，在用于配置磁记录/重放部分的组件被组装到外壳中之后，通过使用回放元件在磁盘介质的特定轨道上回放磁信息，同时逐渐增加加热器的供电量 的磁头滑块。 沿着轨道的圆周方向的多个部分测量重放信号的幅度。 根据测量幅度的变化的增加来检测磁头滑块和磁盘介质之间的接触。 然后，通过从检测到接触的电量的电量中减去电量的预定值而获得的值作为用于磁头滑块的适当电量被存储（设置）到存储部分中。
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公开(公告)号：US06657805B2
公开(公告)日：2003-12-02
申请号：US09944205
申请日：2001-09-04
申请人： Yasutaka Nishida , Takehiko Hamaguchi , Hisashi Takano , Hiroshi Ide , Hideki Sawaguchi , Futoshi Tomiyama
发明人： Yasutaka Nishida , Takehiko Hamaguchi , Hisashi Takano , Hiroshi Ide , Hideki Sawaguchi , Futoshi Tomiyama
IPC分类号： G11B1504
摘要： When the amount of position error PE of a magnetic head meets the condition of Ewf>PE>=Eww for two threshold values Ewf and Eww meeting Ewf>Eww, the track is registered in the track information table as a track requiring rewrite and the tracks on both sides neighboring to the track are temporarily write-inhibited. The data of the track is rewritten on another track later so as to maintain the data. By doing this, the offtrack of the recording track can be made smaller without sacrifice of the access speed and the occurrence probability of write fault can be reduced. Furthermore, the reliability of a magnetic disk apparatus can be improved.
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公开(公告)号：US07724490B2
公开(公告)日：2010-05-25
申请号：US11789575
申请日：2007-04-24
IPC分类号： H01H47/00
CPC分类号： G11B5/0245
摘要： Embodiments in accordance with the present invention provide a degaussing device and a degaussing method capable of efficiently degaussing a magnetic disk, especially, a magnetic disk of the perpendicular magnetic recording system, without resorting to a magnetic field of a high intensity. Embodiments in accordance with the present invention provide a degaussing method of degaussing a magnetic disk not yet installed in a magnetic disk drive by applying an external magnetic field to the magnetic disk by a degaussing device. In accordance with one embodiment, the method includes disposing the magnetic disk in the degaussing device such that the direction of an external magnetic field is inclined at an angle to the axis of easy magnetization of the magnetic disk.
摘要翻译： 根据本发明的实施例提供一种能够有效地消磁磁盘，特别是垂直磁记录系统的磁盘的消磁装置和消磁方法，而不需要采用高强度的磁场。 根据本发明的实施例提供了一种通过用消磁装置对磁盘施加外部磁场来消磁尚未安装在磁盘驱动器中的磁盘的消磁方法。 根据一个实施例，该方法包括将磁盘设置在消磁装置中，使得外部磁场的方向与磁盘容易磁化的轴线倾斜一定角度。
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