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11.发明授权公开(公告)号：US07289284B2
公开(公告)日：2007-10-30
申请号：US11195202
申请日：2005-08-01
申请人： Reiko Arai , Takehiko Hamaguchi , Atsushi Kikugawa , Hideaki Maeda , Liping Shen , Mikio Suzuki
发明人： Reiko Arai , Takehiko Hamaguchi , Atsushi Kikugawa , Hideaki Maeda , Liping Shen , Mikio Suzuki
IPC分类号： G11B5/02
CPC分类号： G11B5/012 , G11B5/02 , G11B5/1278 , G11B5/3903 , G11B27/36 , G11B2005/0016 , G11B2005/0029 , G11B2220/20
摘要： Embodiments of the invention prevent demagnetization or degaussing of recorded magnetizations, even if a stray field is applied. In one embodiment, an output of a read head including a magneto-resistive effect element is inputted to a stray field detector through a DC amplifier and a DC filter. The stray field detector monitors dc components of the output from the read head, and escapes a head from above a magnetic recording medium.
摘要翻译： 即使应用杂散场，本发明的实施例也防止记录磁化的退磁或消磁。 在一个实施例中，包括磁阻效应元件的读出头的输出通过DC放大器和DC滤波器输入到杂散场检测器。 杂散场检测器监测来自读头的输出的直流分量，并从磁记录介质的上方排出头。
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公开(公告)号：US07184236B2
公开(公告)日：2007-02-27
申请号：US10944845
申请日：2004-09-21
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。
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公开(公告)号：US20060171052A1
公开(公告)日：2006-08-03
申请号：US11377367
申请日：2006-03-17
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.
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公开(公告)号：US07068462B2
公开(公告)日：2006-06-27
申请号：US10231264
申请日：2002-08-30
IPC分类号： G11B5/596
CPC分类号： G11B20/10046 , G11B5/012 , G11B5/09 , G11B5/59633 , G11B20/10009 , G11B20/10481 , G11B27/3027 , G11B2005/0029 , G11B2220/20
摘要： A method of enhancing the thermal stability of gray codes is disclosed. The gray code block in a servo area is recorded with a combination of two different magnetization directions. When the two different magnetization directions are expressed as “+” and “−”, the information “1” is recorded as “++−−” or “−−++” with the information “0” recorded as “+−+−” or “−+−+”. Since the filter for gray code demodulation is provided with a perpendicular recording mode, the servo area does not use long-wavelength signals that are susceptible to thermal demagnetization. As a result, thermal stability is enhanced.
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15.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：US20050270676A1
公开(公告)日：2005-12-08
申请号：US11196385
申请日：2005-08-04
CPC分类号： G11B20/10046 , G11B5/012 , G11B5/09 , G11B5/59633 , G11B20/10009 , G11B20/10481 , G11B27/3027 , G11B2005/0029 , G11B2220/20
摘要： A method of enhancing the thermal stability of gray codes is disclosed. The gray code block in a servo area is recorded with a combination of two different magnetization directions. When the two different magnetization directions are expressed as “+” and “−”, the information “1” is recorded as “+−+−” or “−+−+” with the information “0” recorded as “+−+−” or “−+−+”. Since the filter for gray code demodulation is provided with a perpendicular recording mode, the servo area does not use long-wavelength signals that are susceptible to thermal demagnetization. As a result, thermal stability is enhanced.
摘要翻译： 公开了一种提高灰度码的热稳定性的方法。 以两个不同磁化方向的组合记录伺服区域中的灰色码块。 当两个不同的磁化方向表示为“+”和“ - ”时，信息“1”被记录为“+ - + - ”或“ - + - +”，信息“0”记录为“+ - - “或” - + - +“。 由于用于灰度码解调的滤波器具有垂直记录模式，所以伺服区域不使用易于热退磁的长波长信号。 结果，热稳定性提高。
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17.发明授权公开(公告)号：US06940690B2
公开(公告)日：2005-09-06
申请号：US09805806
申请日：2001-03-13
CPC分类号： G11B5/1278 , G11B5/012 , G11B5/02 , G11B5/3116 , G11B5/313 , G11B5/4886
摘要： There are provided a magnetic head and a magnetic disk apparatus wherein an upper magnetic pole is so shaped that, at a position where skew angle is maximum, the maximum of its projected length in the radial direction of a magnetic disk is not more than the track pitch of the magnetic disk, whereby acceleration of thermal relaxation of information recorded on adjacent tracks is obviated even in an area where the skew angle is large.
摘要翻译： 提供了一种磁头和磁盘装置，其中上磁极的形状使得在歪斜角最大的位置处，其磁盘的径向上的突出长度的最大值不大于磁道 即使在歪斜角较大的区域中也能消除记录在相邻轨道上的信息的热松弛的加速度。
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公开(公告)号：US06909566B1
公开(公告)日：2005-06-21
申请号：US10130953
申请日：2000-02-10
CPC分类号： G11B5/596 , G11B5/00 , G11B5/012 , G11B5/02 , G11B5/09 , G11B20/1403 , G11B21/106 , G11B2005/001
摘要： The invention relates to a magnetic recording/reproducing device in which a reproduce head is positioned where the crosstalk between adjacent tracks in a magnetic disk is minimized to maintain an adequate transfer rate in a system involving great crosstalk. The removal of crosstalk ensures the reproduction of the recorded data and thus increases the reliability of the magnetic recording/reproducing device. The magnetic recording/reproducing device according to this invention includes a magnetic disk on which a plurality of tracks are concentrically formed, and data are recorded at different frequencies on adjacent tracks.
摘要翻译： 本发明涉及一种磁记录/再现装置，其中再现头被定位在磁盘中相邻轨道之间的串扰被最小化以在涉及大串扰的系统中保持适当的传送速率。 串扰的去除确保了记录数据的再现，从而提高了磁记录/再现装置的可靠性。 根据本发明的磁记录/再现装置包括其上同心地形成多个轨道的磁盘，并且在相邻轨道上以不同的频率记录数据。
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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
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。
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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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