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41.发明授权公开(公告)号：US07221530B2
公开(公告)日：2007-05-22
申请号：US11245168
申请日：2005-10-07
IPC分类号： G11B5/02
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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42.发明申请Magnetic recording head and magnetic disk storage apparatus mounting the magnetic head 审中-公开安装磁头的磁记录头和磁盘存储装置公开(公告)号：US20060262453A1
公开(公告)日：2006-11-23
申请号：US11436382
申请日：2006-05-17
IPC分类号： G11B5/127
CPC分类号： G11B5/3116 , G11B5/1278 , G11B5/1871 , G11B5/313 , G11B5/3163
摘要： Embodiments of the invention provide a magnetic head which can suppress broadening of the magnetic field distribution in the track-width direction without reducing the magnetic field intensity. In one embodiment, a main pole is composed of a pole tip having a part providing a write-track width, and a yoke part recessed from the air bearing surface in the element-height direction, where the trailing side surface of the pole tip is made as an asymmetric structure with respect to the track center.
摘要翻译： 本发明的实施例提供一种可以抑制磁道宽度方向的磁场分布的扩大而不降低磁场强度的磁头。 在一个实施例中，主极由具有提供写入轨道宽度的部分的极尖和从元件高度方向上的空气轴承表面凹陷的磁极部分组成，其中极尖的后侧表面为 作为相对于轨道中心的不对称结构。
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公开(公告)号：US07092181B2
公开(公告)日：2006-08-15
申请号：US11196385
申请日：2005-08-04
IPC分类号： G11B5/09
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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公开(公告)号：US20060092556A1
公开(公告)日：2006-05-04
申请号：US11262531
申请日：2005-10-28
申请人： Takehiko Hamaguchi , Yoshihisa Kamo , Hideaki Maeda , Yukiya Shimizu , Ikuya Tagawa , Tetsuo Yuki
发明人： Takehiko Hamaguchi , Yoshihisa Kamo , Hideaki Maeda , Yukiya Shimizu , Ikuya Tagawa , Tetsuo Yuki
IPC分类号： G11B17/00
CPC分类号： G11B5/3143 , G11B5/11 , G11B5/1278
摘要： Embodiments of the invention prevent a decrease in magnetization or demagnetization from occurring to recording magnetization regardless of a direction in which a stray field is applied. In one embodiment, an apparatus for data storage system comprises a head having a magnetic field shield in the vicinity of a main pole, and a cover of the device, using a constituent material with a magnetic field shielding effect, across the cover, or at part thereof. When a stray field in a direction perpendicular to a recording medium is applied, the effect of the magnetic field is alleviated by the magnetic field shield installed in the vicinity of the main pole. In such a case, it need only be sufficient to form the magnetic field shield in a shape optimum for removing the stray field in the perpendicular direction only. When a stray field in a direction horizontal in relation to the recording medium is applied, the magnetic field acting on the recording medium is removed by the cover of the device comprising a magnetic component.
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45.发明授权Magnetic disk apparatus having an adjustable mechanism to compensate write or heat element for off-tracking position with yaw angle 失效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：US07027248B2
公开(公告)日：2006-04-11
申请号：US10633621
申请日：2003-08-05
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： In a thermal assisted type magnetic disk apparatus having a head holding a heat element and a write element, in which coercivity of a disk is locally reduced by temperature-increasing the disk and writing is performed by the write element, along with a seek operation to move the head by a rotary actuator in a radial direction, a yaw angle is changed and a heat area and the write element are track-shifted. A mechanism to offset one of the heat area and the write element in a width direction of a slider, to array the heat element and the write element in a track running direction in correspondence with the yaw angle of the head.
摘要翻译： 在具有保持加热元件的头部和写入元件的热辅助型磁盘装置中，通过写入元件，通过写入元件执行盘的矫顽力局部减小并且进行寻道操作 通过旋转致动器在径向方向上移动头部，改变偏航角，并且对热区域和写入元件进行轨道移动。 一种抵消滑块的宽度方向上的加热区域和写入元件中的一个的机构，用于使加热元件和写入元件沿与磁头的偏航角相对应的磁道行进方向排列。
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46.发明申请公开(公告)号：US20060028752A1
公开(公告)日：2006-02-09
申请号：US11245168
申请日：2005-10-07
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：US20050036226A1
公开(公告)日：2005-02-17
申请号：US10944845
申请日：2004-09-21
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。
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公开(公告)号：US06760172B1
公开(公告)日：2004-07-06
申请号：US09616073
申请日：2000-07-13
IPC分类号： G11B509
CPC分类号： G11B5/59633
摘要： To improve the track density by reducing the discontinuity of servo patterns to be generated by a servo track writer, some servo areas existing in one circuit of a magnetic disk are formed at the consecutive first and second circuits of a servo track writer by averaging a plurality of position signals detected from servo patterns at the first and second circuits of the magnetic disk.
摘要翻译： 为了通过减少由伺服轨迹写入器产生的伺服模式的不连续性来提高轨道密度，存在于磁盘的一个电路中的一些伺服区域通过对伺服轨迹写入器的连续的第一和第二电路进行平均而形成， 在磁盘的第一和第二电路处从伺服模式检测的位置信号。
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公开(公告)号：US06717760B2
公开(公告)日：2004-04-06
申请号：US10102651
申请日：2002-03-22
IPC分类号： G11B2736
CPC分类号： B82Y10/00 , B82Y25/00 , G11B5/012 , G11B5/3909 , G11B5/5552 , G11B5/59611 , G11B2005/001 , G11B2005/0016
摘要： A plurality of patterns are formed beforehand so that each of those patterns is deviated slightly from another in each sector in the track width direction, then the pattern is followed up, thereby obtaining both full-track profile and micro-track profile. A variation of a position signal is detected from this profile, thereby creating a table for correcting the non-linearity error of the position signal. Consequently, the distribution of the write/read-back property is measured, thereby enabling the track density to be improved. Furthermore, a variation of the position signal caused by a property variation of the head read-back element is detected and corrected, thereby enabling a high reliability and a high track density to be realized for the object magnetic recording disk apparatus.
摘要翻译： 预先形成多个图案，使得这些图案中的每一个在轨道宽度方向上在每个扇区中与另一个图案稍微偏离，然后跟踪图案，从而获得全轨道轮廓和微轨道轮廓。 从该轮廓检测位置信号的变化，从而创建用于校正位置信号的非线性误差的表格。因此，测量写入/读回属性的分布，从而使轨道密度为 改进。 此外，检测和校正由头读回元件的特性变化引起的位置信号的变化，从而能够实现对象磁记录盘装置的高可靠性和高轨道密度。
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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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