公开(公告)号：US5786952A

公开(公告)日：1998-07-28

申请号：US562203

申请日：1995-11-22

申请人： Masuo Umemoto ,  Yoshihiro Shiroishi ,  Reijiro Tsuchiya ,  Kyo Akagi ,  Takehiko Hamaguchi ,  Takashi Kawabe ,  Atsushi Saito ,  Kouichirou Wakabayashi

发明人： Masuo Umemoto ,  Yoshihiro Shiroishi ,  Reijiro Tsuchiya ,  Kyo Akagi ,  Takehiko Hamaguchi ,  Takashi Kawabe ,  Atsushi Saito ,  Kouichirou Wakabayashi

IPC分类号： G11B5/012 ,  G11B5/035 ,  G11B5/09 ,  G11B5/48 ,  G11B5/49 ,  G11B5/55 ,  G11B5/596 ,  G11B20/10

CPC分类号： G11B5/59633 ,  G11B20/10009 ,  G11B5/012 ,  G11B5/09 ,  G11B5/4886 ,  G11B5/4976 ,  G11B5/5526 ,  G11B5/035

摘要： A magnetic digital storage method and system which can improve a recording density and can reduce a cross-talk upon reproducing. An inputted high-speed digital signal is converted to a plurality of low-speed digital signal sequences by a recording circuit and each of the low-speed signal sequence is recorded onto a plurality of adjacent recorded tracks of a recording medium by integrated parallel recording heads. One servo signal is commonly recorded to the plurality of recorded tracks. Further, when recording the digital signal to the adjacent recorded tracks of the recording medium, a delay of a signal that is applied to each recording head is adjusted such that the phases of magnetic transition points given by the recording signal in the adjacent recorded tracks are not identical in the circumferential direction.

摘要翻译： 一种磁数字存储方法和系统，其可以提高记录密度并且可以在再现时减少串扰。 输入的高速数字信号通过记录电路转换成多个低速数字信号序列，并且每个低速信号序列通过集成并行记录头记录在记录介质的多个相邻的记录磁道上 。 一个伺服信号通常记录到多个记录的轨道。 此外，当将数字信号记录到记录介质的相邻记录磁道时，调整施加到每个记录头的信号的延迟，使得由相邻记录磁道中的记录信号给出的磁转变点的相位为 在圆周方向上不相同。

公开(公告)号：US6130797A

公开(公告)日：2000-10-10

申请号：US913835

申请日：1997-09-16

申请人： Kyo Akagi ,  Yoshihiro Shiroishi ,  Reijiro Tsuchiya ,  Takehiko Hamaguchi ,  Masuo Umemoto ,  Mikio Suzuki ,  Takashi Kawabe ,  Katsuro Watanabe ,  Kiyoshi Matsumoto ,  Atsushi Saito ,  Kouichirou Wakabayashi ,  Yosuke Hamada

发明人： Kyo Akagi ,  Yoshihiro Shiroishi ,  Reijiro Tsuchiya ,  Takehiko Hamaguchi ,  Masuo Umemoto ,  Mikio Suzuki ,  Takashi Kawabe ,  Katsuro Watanabe ,  Kiyoshi Matsumoto ,  Atsushi Saito ,  Kouichirou Wakabayashi ,  Yosuke Hamada

IPC分类号： G11B5/596 ,  G11B7/095 ,  G11B11/105

CPC分类号： G11B5/59655 ,  G11B11/10576 ,  G11B5/59627 ,  G11B11/10578 ,  G11B7/0953

摘要： Virtual tracks are set so that the rotation center of a magnetic recording medium or the vicinity of the rotation center coincides with the track center of the data information, and positioning servo control is performed. Thus, since it is not necessary to faithfully follow the track center line specified by the servo information that is previously recorded on the magnetic recording medium or magnetooptical recording medium, a vibration is not easily caused in synchronism with the rotation. Therefore, when the rotation center and the pattern center are deviated from each other, since a vibration is not caused in synchronism with the rotation, the magnetic head of the magnetic recorder or the magnetooptical head of the magnetooptical recorder is able to follow tracks with higher precision. Accordingly, the recording density can be increased.

摘要翻译： PCT No.PCT / JP95 / 00474 Sec。 371日期1997年9月17日 102（e）1997年9月17日PCT 1995年3月17日PCT公布。 公开号WO96 / 29700 日期1996年9月26日设置虚拟磁道，使得磁记录介质的旋转中心或旋转中心附近与数据信息的轨道中心一致，并执行定位伺服控制。 因此，由于不需要忠实地跟踪由先前记录在磁记录介质或磁光记录介质上的伺服信息指定的轨道中心线，因此不易与旋转同步地产生振动。 因此，当旋转中心和图案中心彼此偏离时，由于不会与旋转同步地产生振动，磁记录器的磁头或磁光记录器的磁光头能够跟随具有更高的轨迹 精确。 因此，可以提高记录密度。

公开(公告)号：US06657804B1

公开(公告)日：2003-12-02

申请号：US09451912

申请日：1999-12-01

申请人： Futoshi Tomiyama ,  Takehiko Hamaguchi ,  Toru Matsushita ,  Hideki Zaitsu ,  Reijiro Tsuchiya ,  Hisashi Takano

发明人： Futoshi Tomiyama ,  Takehiko Hamaguchi ,  Toru Matsushita ,  Hideki Zaitsu ,  Reijiro Tsuchiya ,  Hisashi Takano

IPC分类号： G11B1504

CPC分类号： G11B5/5526 ,  G11B5/59633

摘要： A magnetic recording disk drive can prevent the deterioration of the head off-track characteristics and the reduction of the drive performance even when an erase band asymmetry resulting from a skew angle exists. A write inhibit slice value for an inner peripheral side offset is made smaller than a write inhibit slice value for an outer peripheral side offset at a position where an erase band on the inner peripheral side is greater than an erase band on the outer peripheral side, so that the adjacent track on the outer peripheral side cannot easily erase a data track. On the contrary, the inner periphery and the outer periphery are paraphrased at a position where the erase band on the outer peripheral side is greater than the erase band on the inner peripheral side.

摘要翻译： 磁记录盘驱动器即使当存在由倾斜角度导致的擦除带不对称性时，也可以防止磁头偏离磁道特性的恶化和驱动性能的降低。 使内周侧偏移的写禁止限幅值小于在内周侧的擦除频带大于外周侧的擦除频带的位置处的外周侧偏移的写禁止限幅值， 使得外周侧的相邻轨道不能容易地擦除数据轨道。 相反，内周侧和外周侧在外周侧的擦除带大于内周侧的擦除带的位置被释义。

公开(公告)号：US06879460B2

公开(公告)日：2005-04-12

申请号：US10681211

申请日：2003-10-09

申请人： Futoshi Tomiyama ,  Takehiko Hamaguchi ,  Toru Matsushita ,  Hideki Zaitsu ,  Reijiro Tsuchiya ,  Hisashi Takano

发明人： Futoshi Tomiyama ,  Takehiko Hamaguchi ,  Toru Matsushita ,  Hideki Zaitsu ,  Reijiro Tsuchiya ,  Hisashi Takano

IPC分类号： G11B5/09 ,  G11B5/55 ,  G11B5/56 ,  G11B5/596 ,  G11B15/04 ,  G11B21/02 ,  G11B21/10

CPC分类号： G11B5/5526 ,  G11B5/59633

摘要： A magnetic recording disk drive can prevent the deterioration of the head off-track characteristics and the reduction of the drive performance even when an erase band asymmetry resulting from a skew angle exists. A write inhibit slice value for an inner peripheral side offset is made smaller than a write inhibit slice value for an outer peripheral side offset at a position where an erase band on the inner peripheral side is greater than an erase band on the outer peripheral side, so that the adjacent track on the outer peripheral side cannot easily erase a data track. On the contrary, the inner periphery and the outer periphery are paraphrased at a position where the erase band on the outer peripheral side is greater than the erase band on the inner peripheral side.

摘要翻译： 磁记录盘驱动器即使当存在由倾斜角度导致的擦除带不对称性时，也可以防止磁头偏离磁道特性的恶化和驱动性能的降低。 使内周侧偏移的写禁止限幅值小于在内周侧的擦除频带大于外周侧的擦除频带的位置处的外周侧偏移的写禁止限幅值， 使得外周侧的相邻轨道不能容易地擦除数据轨道。 相反，内周侧和外周侧在外周侧的擦除带大于内周侧的擦除带的位置被释义。

公开(公告)号：US07184236B2

公开(公告)日：2007-02-27

申请号：US10944845

申请日：2004-09-21

申请人： Takehiko Hamaguchi ,  Kyo Akagi ,  Hisashi Takano ,  Takayuki Ichihara

发明人： Takehiko Hamaguchi ,  Kyo Akagi ,  Hisashi Takano ,  Takayuki Ichihara

IPC分类号： G11B15/04 ,  G11B19/04

CPC分类号： G11B20/1252 ,  G11B5/012 ,  G11B5/5582 ,  G11B5/59611 ,  G11B5/59655 ,  G11B5/59694 ,  G11B20/10 ,  G11B27/3027 ,  G11B2020/1232 ,  G11B2020/1238 ,  G11B2020/1267 ,  G11B2020/1287 ,  G11B2220/20 ,  G11B2220/2516

摘要： A hard disk drive and magnetic medium including a servo area, a data area divided into a plurality of sector blocks and at least one micro-servo area disposed between two sector blocks. There may be a micro-servo area immediately preceding each of the plurality of sector blocks. The micro-servo areas include an address mark and a track parity check code that allow the detection of an external shock that causes the recording (write) head to skip to an adjacent track in the hard disk medium. The micro-servo area is smaller than the servo areas, and various numbers of different track parity check codes can be used for different resolution of shock detection. An acceleration sensor may also be provided to detect larger external shocks. By detecting various external shocks with improved accuracy, and aborting the recording operation of data if an external shock is detected, the corruption of data in adjacent tracks is substantially reduced to improve disk drive performance.

摘要翻译： 一种硬盘驱动器和磁介质，包括伺服区域，分成多个扇区块的数据区域和设置在两个扇区块之间的至少一个微伺服区域。 可能存在紧邻在多个扇区块中的每一个之前的微伺服区域。 微伺服区域包括地址标记和轨道奇偶校验码，其允许检测导致记录（写入）头跳到硬盘介质中的相邻轨道的外部冲击。 微伺服区域小于伺服区域，各种数量的不同轨道奇偶校验码可用于不同的震动检测分辨率。 还可以提供加速度传感器来检测更大的外部冲击。 通过以更高的精度检测各种外部冲击，并且如果检测到外部冲击则中止数据的记录操作，则相当的磁道中的数据的损坏被大大减少以提高磁盘驱动器的性能。

公开(公告)号：US06822818B2

公开(公告)日：2004-11-23

申请号：US09919915

申请日：2001-08-02

申请人： Takehiko Hamaguchi ,  Kyo Akagi ,  Hisashi Takano ,  Takayuki Ichihara

发明人： Takehiko Hamaguchi ,  Kyo Akagi ,  Hisashi Takano ,  Takayuki Ichihara

IPC分类号： G11B509

CPC分类号： G11B20/1252 ,  G11B5/012 ,  G11B5/5582 ,  G11B5/59611 ,  G11B5/59655 ,  G11B5/59694 ,  G11B20/10 ,  G11B27/3027 ,  G11B2020/1232 ,  G11B2020/1238 ,  G11B2020/1267 ,  G11B2020/1287 ,  G11B2220/20 ,  G11B2220/2516

摘要： A hard disk drive and magnetic medium including a servo area, a data area divided into a plurality of sector blocks and at least one micro-servo area disposed between two sector blocks. There may be a micro-servo area immediately preceding each of the plurality of sector blocks. The micro-servo areas include an address mark and a track parity check code that allow the detection of an external shock that causes the recording (write) head to skip to an adjacent track in the hard disk medium. The micro-servo area is smaller than the servo areas, and various numbers of different track parity check codes can be used for different resolution of shock detection. An acceleration sensor may also be provided to detect larger external shocks. By detecting various external shocks with improved accuracy, and aborting the recording operation of data if an external shock is detected, the corruption of data in adjacent tracks is substantially reduced to improve disk drive performance.

摘要翻译： 一种硬盘驱动器和磁介质，包括伺服区域，分成多个扇区块的数据区域和设置在两个扇区块之间的至少一个微伺服区域。 可能存在紧邻在多个扇区块中的每一个之前的微伺服区域。 微伺服区域包括地址标记和轨道奇偶校验码，其允许检测导致记录（写入）头跳到硬盘介质中的相邻轨道的外部冲击。 微伺服区域小于伺服区域，各种数量的不同轨道奇偶校验码可用于不同的震动检测分辨率。 还可以提供加速度传感器来检测更大的外部冲击。 通过以更高的精度检测各种外部冲击，并且如果检测到外部冲击则中止数据的记录操作，则相当的磁道中的数据的损坏被大大减少以提高磁盘驱动器的性能。

公开(公告)号：US20070247741A1

公开(公告)日：2007-10-25

申请号：US11788490

申请日：2007-04-20

申请人： Kyo Akagi ,  Takehiko Hamaguchi ,  Atsushi Takeichi

发明人： Kyo Akagi ,  Takehiko Hamaguchi ,  Atsushi Takeichi

IPC分类号： G11B21/02 ,  G11B5/596

CPC分类号： G11B5/59655 ,  G11B5/024

摘要： In an embodiment of the present invention, with Self Servo Write (SSW), a head slider is used to perform AC erase to a recording surface of a magnetic disk. The AC erase is performed asynchronously to every track. A frequency for use with AC erase, i.e., a frequency of an AC erase pattern is three times or higher than a burst frequency of a product servo pattern or a burst frequency of a radial pattern. By satisfying such requirements, for the magnetic disk of vertical magnetic recording, it becomes possible to substantially stop adversely affecting pattern reading in an AC erase area.

摘要翻译： 在本发明的一个实施例中，使用自动伺服写入（SSW），磁头滑动器用于对磁盘的记录表面执行AC擦除。 AC擦除与每个轨道异步执行。 用于AC擦除的频率，即AC擦除模式的频率是产品伺服模式的突发频率或径向图案的突发频率的三倍或更高。 通过满足这种要求，对于垂直磁记录磁盘，可以基本上停止对交流擦除区域中的图形读取的不利影响。

公开(公告)号：US20050036226A1

公开(公告)日：2005-02-17

申请号：US10944845

申请日：2004-09-21

申请人： Takehiko Hamaguchi ,  Kyo Akagi ,  Hisashi Takano ,  Takayuki Ichihara

发明人： Takehiko Hamaguchi ,  Kyo Akagi ,  Hisashi Takano ,  Takayuki Ichihara

IPC分类号： G11B5/012 ,  G11B5/55 ,  G11B5/596 ,  G11B20/10 ,  G11B20/12 ,  G11B21/10 ,  G11B27/30 ,  G11B19/04 ,  G11B21/02 ,  G11B27/36

CPC分类号： G11B20/1252 ,  G11B5/012 ,  G11B5/5582 ,  G11B5/59611 ,  G11B5/59655 ,  G11B5/59694 ,  G11B20/10 ,  G11B27/3027 ,  G11B2020/1232 ,  G11B2020/1238 ,  G11B2020/1267 ,  G11B2020/1287 ,  G11B2220/20 ,  G11B2220/2516

摘要： A hard disk drive and magnetic medium including a servo area, a data area divided into a plurality of sector blocks and at least one micro-servo area disposed between two sector blocks. There may be a micro-servo area immediately preceding each of the plurality of sector blocks. The micro-servo areas include an address mark and a track parity check code that allow the detection of an external shock that causes the recording (write) head to skip to an adjacent track in the hard disk medium. The micro-servo area is smaller than the servo areas, and various numbers of different track parity check codes can be used for different resolution of shock detection. An acceleration sensor may also be provided to detect larger external shocks. By detecting various external shocks with improved accuracy, and aborting the recording operation of data if an external shock is detected, the corruption of data in adjacent tracks is substantially reduced to improve disk drive performance.

摘要翻译： 一种硬盘驱动器和磁介质，包括伺服区域，分成多个扇区块的数据区域和设置在两个扇区块之间的至少一个微伺服区域。 可能存在紧邻在多个扇区块中的每一个之前的微伺服区域。 微伺服区域包括地址标记和轨道奇偶校验码，其允许检测导致记录（写入）头跳到硬盘介质中的相邻轨道的外部冲击。 微伺服区域小于伺服区域，各种数量的不同轨道奇偶校验码可用于不同的震动检测分辨率。 还可以提供加速度传感器来检测更大的外部冲击。 通过以更高的精度检测各种外部冲击，并且如果检测到外部冲击则中止数据的记录操作，则相当的磁道中的数据的损坏被大大减少以提高磁盘驱动器的性能。

公开(公告)号：US07724490B2

公开(公告)日：2010-05-25

申请号：US11789575

申请日：2007-04-24

申请人： Hitoshi Tamura ,  Hiroki Mori ,  Mitsuru Hamaguchi ,  Kunihiko Mine ,  Takehiko Hamaguchi

发明人： Hitoshi Tamura ,  Hiroki Mori ,  Mitsuru Hamaguchi ,  Kunihiko Mine ,  Takehiko Hamaguchi

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。

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。