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：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：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：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：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：US20090300907A1

公开(公告)日：2009-12-10

申请号：US12315140

申请日：2008-11-26

申请人： Kyo Akagi ,  Kensuke Ishiwata ,  Takashi Kouno ,  Atsushi Takeichi ,  Kenji Kuroki ,  Toshihiko Iwaisako

发明人： Kyo Akagi ,  Kensuke Ishiwata ,  Takashi Kouno ,  Atsushi Takeichi ,  Kenji Kuroki ,  Toshihiko Iwaisako

IPC分类号： G11B5/127

CPC分类号： G11B33/148 ,  G11B25/043 ,  G11B33/1486 ,  Y10T29/53165

摘要： Embodiments of the present invention provide a method for manufacturing a magnetic disk unit, the method permitting easy and efficient introduction of a low-density gas into the enclosure. According to one embodiment, an enclosure of the magnetic disk unit has a gas inlet and a gas outlet, each of which is provided with a filter. When the enclosure is filled with helium, the mass flow rate of helium being supplied to the gas inlet is detected and the mass flow rate of helium being supplied to the gas inlet is controlled according to the thus detected mass flow rate of helium.

摘要翻译： 本发明的实施例提供一种用于制造磁盘单元的方法，该方法允许将低密度气体容易且有效地引入到外壳中。 根据一个实施例，磁盘单元的外壳具有气体入口和气体出口，每个气体出口设置有过滤器。 当外壳填充有氦时，检测到供给到气体入口的氦的质量流量，并根据所检测到的氦质量流量来控制供给气体入口的氦的质量流量。

公开(公告)号：US08861116B2

公开(公告)日：2014-10-14

申请号：US13196022

申请日：2011-08-02

申请人： Mao Nishiyama ,  Masafumi Mochizuki ,  Kyo Akagi ,  Shuji Nishida ,  Kazunari Usui

发明人： Mao Nishiyama ,  Masafumi Mochizuki ,  Kyo Akagi ,  Shuji Nishida ,  Kazunari Usui

IPC分类号： G11B5/09 ,  G11B15/46 ,  G11B21/02 ,  G11B5/82 ,  G11B5/596 ,  G11B5/74

CPC分类号： G11B5/743 ,  G11B5/59627 ,  G11B5/59661

摘要： In one embodiment, a method includes spiral writing a DC pattern onto a magnetic disk medium using a writer of a magnetic head while moving the magnetic head in a direction about parallel to a radial direction of the magnetic disk medium while rotating the magnetic disk medium, reading the magnetic disk medium while moving the magnetic head in the direction about parallel to the radial direction of the magnetic disk medium while rotating the magnetic disk medium, and calculating a track pitch interval between data tracks of the magnetic disk medium based on the reading of the magnetic disk medium. In another embodiment, a magnetic disk medium includes a DC spiral pattern in a radial region further outward and/or a radial region further inward than a radial region where data is recorded.

摘要翻译： 在一个实施例中，一种方法包括使用磁头的写入器将DC图案螺旋写入到磁盘介质上，同时在旋转磁盘介质的同时在大致平行于磁盘介质的径向的方向上移动磁头， 在旋转磁盘介质的同时沿着与磁盘介质的径向大致平行的方向移动磁头的同时读取磁盘介质，并且基于读取磁盘介质计算磁盘介质的数据磁道之间的磁道间距间隔 磁盘介质。 在另一个实施例中，磁盘介质包括在径向区域中进一步向内和/或径向区域的直流螺旋图案，该径向区域比记录数据的径向区域更内侧。

公开(公告)号：US07116508B2

公开(公告)日：2006-10-03

申请号：US11044298

申请日：2005-01-28

申请人： Kyo Akagi ,  Takashi Yamaguchi ,  Koki Uefune ,  Motoyasu Tsunoda ,  Atsushi Saito

发明人： Kyo Akagi ,  Takashi Yamaguchi ,  Koki Uefune ,  Motoyasu Tsunoda ,  Atsushi Saito

IPC分类号： G11B15/48 ,  G11B15/18 ,  G11B21/02

CPC分类号： G11B5/012 ,  G11B17/0402 ,  G11B17/0407 ,  G11B19/04 ,  G11B2005/001

摘要： A magnetic disk apparatus has: a magnetic disk having a magnetic film formed on a substrate; a spindle motor for rotating the magnetic disk; a magnetic head for writing/reading information on/from the magnetic disk; a supporting member for supporting the magnetic head; a driving mechanism for moving the magnetic head to a predetermined position on the magnetic disk; a magnetic writing/reading circuit for enabling the magnetic head to write/read information on/from the magnetic disk; an interface for sending/receiving signals for controlling the information to/from another information processing device, a device for detecting whether or not the magnetic disk apparatus is in operation; and mechanism for latching movable part of the magnetic disk apparatus on the basis of detection result of the detecting device.

摘要翻译： 磁盘装置具有：在基板上形成有磁性膜的磁盘; 用于旋转磁盘的主轴电机; 用于在/从磁盘读/写信息的磁头; 用于支撑磁头的支撑构件; 用于将磁头移动到磁盘上的预定位置的驱动机构; 用于使磁头能够从/从磁盘写入/读取信息的磁性写入/读取电路; 用于发送/接收用于将信息控制到另一个信息处理装置的信号的接口，用于检测磁盘装置是否正在运行的装置; 以及基于检测装置的检测结果来锁定磁盘装置的可动部的机构。

公开(公告)号：US07054120B2

公开(公告)日：2006-05-30

申请号：US10700500

申请日：2003-11-05

申请人： Ryoichi Nakatani ,  Masahiro Kitada ,  Naoki Koyama ,  Isamu Yuito ,  Hisashi Takano ,  Eijin Moriwaki ,  Mikio Suzuki ,  Masaaki Futamoto ,  Fumio Kugiya ,  Yoshibumi Matsuda ,  Kazuo Shiiki ,  Yoshinori Miyamura ,  Kyo Akagi ,  Takeshi Nakao ,  Hirotsugu Fukuoka ,  Takayuki Munemoto ,  Tokuho Takagaki ,  Toshio Kobayashi ,  Hideo Tanabe ,  Noboru Shimizu

发明人： Ryoichi Nakatani ,  Masahiro Kitada ,  Naoki Koyama ,  Isamu Yuito ,  Hisashi Takano ,  Eijin Moriwaki ,  Mikio Suzuki ,  Masaaki Futamoto ,  Fumio Kugiya ,  Yoshibumi Matsuda ,  Kazuo Shiiki ,  Yoshinori Miyamura ,  Kyo Akagi ,  Takeshi Nakao ,  Hirotsugu Fukuoka ,  Takayuki Munemoto ,  Tokuho Takagaki ,  Toshio Kobayashi ,  Hideo Tanabe ,  Noboru Shimizu

IPC分类号： G11B5/39

CPC分类号： G11B5/398 ,  B82Y10/00 ,  B82Y25/00 ,  G01R33/093 ,  G11B5/3903 ,  G11B5/3909 ,  G11B5/3929 ,  G11B5/3967 ,  G11B2005/0002 ,  G11B2005/0016 ,  G11B2005/3996 ,  H01F10/324 ,  H01F10/3254 ,  H01F10/3268 ,  H01L43/08 ,  Y10T29/49032 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/49155

摘要： The magnetoresistance effect element is of a multilayered structure having at least magnetic layers and an intermediate layer of an insulating material, a semiconductor or an antiferromagnetic material against the magnetic layers, and the magnetoresistance effect element has terminals formed at least on the opposite magnetic layers, respectively, so that a current flows in the intermediate layer. The film surfaces of all the magnetic layers constituting the magnetoresistance effect element are opposed substantially at right angles to the recording surface of a magnetic recording medium. Therefore, the area of the magnetic layers facing the recording surface of the magnetic recording medium can be extremely reduced, and thus the magnetic field from a very narrow region of the high-density recorded magnetic recording medium can be detected by the current which has a tunneling characteristic and passes through the intermediate layer.

摘要翻译： 磁阻效应元件是至少具有磁性层和抵抗磁性层的绝缘材料，半导体或反铁磁材料的中间层的多层结构，并且磁阻效应元件至少在相对的磁性层上形成端子， 使得电流在中间层中流动。 构成磁阻效应元件的所有磁性层的膜表面基本上与磁记录介质的记录表面成直角相对。 因此，能够极大地降低与磁记录介质的记录面对置的磁性层的面积，因此能够通过电流检测来自高密度记录磁记录介质的非常窄的区域的磁场 穿透特性，穿过中间层。