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1. 发明申请

US20070247776A1 Magnetic disk degaussing device and degaussing method 有权
标题翻译：磁盘消磁装置和消磁方法
公开(公告)号：US20070247776A1
公开(公告)日：2007-10-25
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了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。

2. 发明授权

US07724490B2 Magnetic disk degaussing device and degaussing method 有权
标题翻译：磁盘消磁装置和消磁方法
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。

3. 发明授权

US07545595B2 Magnetic disk apparatus having an adjustable mechanism to compensate write or heat element for off-tracking position with yaw angle 失效
标题翻译：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。

4. 发明申请

US20090021854A1 Method of servo writing for magnetic recording system, magnetic recording system 有权
公开(公告)号：US20090021854A1
公开(公告)日：2009-01-22
申请号：US12230989
申请日：2008-09-09
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
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.

5. 发明申请

US20070046286A1 Magnetic head tester and method of manufacturing magnetic disk drive 失效
标题翻译：磁头测试仪和制造磁盘驱动器的方法
公开(公告)号：US20070046286A1
公开(公告)日：2007-03-01
申请号：US11515268
申请日：2006-09-01
申请人： Hiroshi Umezaki , Norifumi Miyamoto , Kazuhiko Washizu , Takehiko Hamaguchi , Kenji Itoh
发明人： Hiroshi Umezaki , Norifumi Miyamoto , Kazuhiko Washizu , Takehiko Hamaguchi , Kenji Itoh
IPC分类号： G01R33/12
CPC分类号： G11B5/012 , G11B5/455 , G11B5/4555 , G11B2005/001
摘要： Embodiments of the invention provide an inexpensive magnetic head tester employing component parts of a production HDD and capable of exercising functions very close to those of a production HDD. In one embodiment, a magnetic head tester employs the VCM actuator and the control circuit of a production HDD and has a lightweight, simple HGA fixing mechanism mounted on an actuator arm. The HGA fixing mechanism fixes an HGA to the actuator arm by a method using a very light holding spring mounted on the arm, a method of mechanically clamping an HGA by using air pressure, or a method of fixing an HGA to the arm by elastically deforming a rubber clamping member by air pressure. Servo control is achieved by the actuator of a production VCM. An end part of the VCM actuator is stopped by a stopping mechanism and is held by a holding spring to prevent the runaway of the VCM actuator. Servo control is performed by balancing the driving force of the VCM and the resilience of the spring.
摘要翻译：本发明的实施例提供了一种廉价的磁头测试仪，其使用生产HDD的组件并且能够执行与生产HDD的功能非常接近的功能。在一个实施例中，磁头测试仪使用VCM致动器和制造HDD的控制电路，并且具有安装在致动器臂上的重量轻，简单的HGA固定机构。 HGA固定机构通过使用安装在臂上的非常轻的保持弹簧的方法将HGA固定到致动器臂，使用空气压力机械地夹持HGA的方法，或通过弹性变形将HGA固定到臂的方法通过空气压力的橡胶夹紧构件。通过生产VCM的执行器实现伺服控制。 VCM致动器的端部由止动机构阻止，并由保持弹簧保持，以防止VCM致动器的失控。通过平衡VCM的驱动力和弹簧的弹性来进行伺服控制。

6. 发明申请

US20060152843A1 Servo information recording method, magnetic recording media, and magnetic disk apparatus 失效
标题翻译：伺服信息记录方法，磁记录介质和磁盘装置
公开(公告)号：US20060152843A1
公开(公告)日：2006-07-13
申请号：US11331921
申请日：2006-01-12
申请人： Takehiko Hamaguchi , Hideaki Maeda , Kazuaki Usui , Kazuhisa Shishida , Takashi Konishi
发明人： Takehiko Hamaguchi , Hideaki Maeda , Kazuaki Usui , Kazuhisa Shishida , Takashi Konishi
IPC分类号： G11B21/02
CPC分类号： G11B5/59655
摘要： Embodiments of the invention provide optimum servo patterns for perpendicular magnetic recording method. In one embodiment, a burst field of servo patterns is composed of burst-signal parts in each of which a constant frequency occurs successively and zero-signal parts each of which has been demagnetized to a state of zero-magnetization, and the total magnetization of the burst field is made approximately 0. The zero signal portions are formed by shutting off a write current at a time during an operation to record servo patterns on a disk initialized to a state of zero-magnetization. The total magnetization of all servo patterns is made approximately 0 by encoding an address mark field and a track code field of servo patterns by a phase shift method.
摘要翻译：本发明的实施例提供了用于垂直磁记录方法的最佳伺服模式。在一个实施例中，伺服模式的脉冲串区域由突发信号部分组成，其中每个脉冲串信号部分连续出现恒定频率，零信号部分已经被去磁到零磁化状态，并且总磁化强度脉冲串区域被制成大约0.零信号部分是通过在操作期间的一个时刻关闭写入电流来形成的，以便在初始化为零磁化的状态的盘上记录伺服模式。通过相移法对伺服模式的地址标记场和轨迹代码域进行编码，使所有伺服模式的总磁化大致为0。

7. 发明授权

US06906889B2 Magnetic disk drive 失效
标题翻译：磁盘驱动器
公开(公告)号：US06906889B2
公开(公告)日：2005-06-14
申请号：US10217452
申请日：2002-08-14
申请人： Takehiko Hamaguchi , Hisashi Takano , Futoshi Tomiyama , Toru Matsushita
发明人： Takehiko Hamaguchi , Hisashi Takano , Futoshi Tomiyama , Toru Matsushita
IPC分类号： G11B19/00 , G11B5/55 , G11B19/20 , G11B21/08 , G11B25/04 , G11B33/12 , G11B5/596
CPC分类号： G11B33/121 , G11B5/5521 , G11B25/043
摘要： A magnetic disk drive has a low power consumption state in which the spindle motor is stopped for reducing the average power consumption when no read or write commands have been received. When a read or write command is received, the spindle motor is started. The time it takes to complete a read command is shorter than that for a write command as measured from the receipt of the read command or write command with the spindle motor stopped in the low power consumption state.
摘要翻译：磁盘驱动器具有低功耗状态，其中主轴电机停止以在没有接收到读或写命令时降低平均功耗。当接收到读或写命令时，主轴电机起动。完成读取命令所需的时间短于从主命令电机停止在低功耗状态时从读取命令或写入命令的接收测量的写命令的时间。

8. 发明授权

US06515817B1 Magnetic disk drive 失效
公开(公告)号：US06515817B1
公开(公告)日：2003-02-04
申请号：US09376354
申请日：1999-08-18
申请人： Takehiko Hamaguchi , Hisashi Takano , Futoshi Tomiyama , Toru Matsushita
发明人： Takehiko Hamaguchi , Hisashi Takano , Futoshi Tomiyama , Toru Matsushita
IPC分类号： G11B1546
CPC分类号： G11B33/121 , G11B5/5521 , G11B25/043
摘要： A magnetic disk drive has a low power consumption state in which the spindle motor is stopped for reducing the average power consumption when no read or write commands have been received. When a read or write command is received, the spindle motor is started. The time it takes to complete a read command is shorter than that for a write command as measured from the receipt of the read command or write command with the spindle motor stopped in the low power consumption state.

9. 发明授权

US06327112B1 Adjacent track position detectable information storage apparatus 失效
标题翻译：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。

10. 发明申请

US20060187578A1 Magnetic disk drive 有权
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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