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公开(公告)号：US07450349B2
公开(公告)日：2008-11-11
申请号：US11292575
申请日：2005-12-02
申请人： Yasutaka Nishida , Ikuya Tagawa , Masafumi Mochizuki , Roger Wood
发明人： Yasutaka Nishida , Ikuya Tagawa , Masafumi Mochizuki , Roger Wood
IPC分类号： G11B5/39
CPC分类号： G11B5/3146 , G11B5/11 , G11B5/1278 , G11B5/3116 , G11B5/315
摘要： Embodiments of the invention avoid erasure of recorded data by concentrating stray fields on a magnetic head element. According to one embodiment, in a magnetic storage apparatus using a perpendicular recording medium with a soft magnetic under layer, a soft magnetic shield is provided so as to surround the upper parts and sides of magnetic head elements. A distance between the soft magnetic shield and the medium is shorter than that between the soft magnetic shield and the magnetic head element.
摘要翻译： 本发明的实施例通过将杂散场集中在磁头元件上来避免记录数据的擦除。 根据一个实施例，在使用具有软磁下层的垂直记录介质的磁存储装置中，设置软磁屏蔽以包围磁头元件的上部和侧部。 软磁屏蔽和介质之间的距离比软磁屏蔽和磁头元件之间的距离短。
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公开(公告)号：US20060119984A1
公开(公告)日：2006-06-08
申请号：US11292575
申请日：2005-12-02
申请人： Yasutaka Nishida , Ikuya Tagawa , Masafumi Mochizuki , Roger Wood
发明人： Yasutaka Nishida , Ikuya Tagawa , Masafumi Mochizuki , Roger Wood
IPC分类号： G11B5/41
CPC分类号： G11B5/3146 , G11B5/11 , G11B5/1278 , G11B5/3116 , G11B5/315
摘要： Embodiments of the invention avoid erasure of recorded data by concentrating stray fields on a magnetic head element. According to one embodiment, in a magnetic storage apparatus using a perpendicular recording medium with a soft magnetic under layer, a soft magnetic shield is provided so as to surround the upper parts and sides of magnetic head elements. A distance between the soft magnetic shield and the medium is shorter than that between the soft magnetic shield and the magnetic head element.
摘要翻译： 本发明的实施例通过将杂散场集中在磁头元件上来避免记录数据的擦除。 根据一个实施例，在使用具有软磁下层的垂直记录介质的磁存储装置中，设置软磁屏蔽以包围磁头元件的上部和侧部。 软磁屏蔽和介质之间的距离比软磁屏蔽和磁头元件之间的距离短。
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公开(公告)号：US20060139815A1
公开(公告)日：2006-06-29
申请号：US11317192
申请日：2005-12-22
申请人： Syuji Nishida , Yasutaka Nishida , Ikuya Tagawa
发明人： Syuji Nishida , Yasutaka Nishida , Ikuya Tagawa
CPC分类号： G11B5/3912 , G11B5/1278
摘要： Embodiments of the invention avoid loss of information as recorded, due to an external magnetic field applied. In one embodiment, a pole expanded part prone to occurrence of magnetic saturation is formed so as to prevent magnetic fluxes from being converged at ends of a return pole of a magnetic head.
摘要翻译： 由于施加了外部磁场，本发明的实施例避免了记录的信息丢失。 在一个实施例中，形成容易发生磁饱和的极扩展部分，以防止磁通量在磁头的返回极的端部收敛。
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4.发明授权Controlling an overshoot amplitude level based on a recording data pattern in a magnetic disk drive 有权基于磁盘驱动器中的记录数据模式来控制过冲幅度电平公开(公告)号：US07830631B2
公开(公告)日：2010-11-09
申请号：US11890001
申请日：2007-08-03
申请人： Takeshi Nakagawa , Yasutaka Nishida , Ikuya Tagawa
发明人： Takeshi Nakagawa , Yasutaka Nishida , Ikuya Tagawa
IPC分类号： G11B5/09
CPC分类号： G11B5/02 , G11B2005/001
摘要： Embodiments of the present invention reduce lowering of a recording current and a recording magnetic field that might occur upon execution of write pre-compensation for compensating the NLTS according to a perpendicular magnetic recording method. According to one embodiment, the recording current overshoot is increased for recording a high NLTS recording data pattern. The read signal quality is improved, thereby a highly reliable magnetic disk can be provided.
摘要翻译： 本发明的实施例减少了在执行用于根据垂直磁记录方法补偿NLTS的写预补偿时可能发生的记录电流和记录磁场的降低。 根据一个实施例，增加记录电流过冲以记录高的NLTS记录数据模式。 读取信号质量得到改善，从而可以提供高度可靠的磁盘。
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5.发明授权Thin film magnetic head wherein at least one of a return pole, a first shield, and a second shield has a reverse taper 失效薄膜磁头，其中返回极，第一屏蔽和第二屏蔽中的至少一个具有倒锥度公开(公告)号：US07518825B2
公开(公告)日：2009-04-14
申请号：US11317192
申请日：2005-12-22
申请人： Syuji Nishida , Yasutaka Nishida , Ikuya Tagawa
发明人： Syuji Nishida , Yasutaka Nishida , Ikuya Tagawa
CPC分类号： G11B5/3912 , G11B5/1278
摘要： Embodiments of the invention avoid loss of information as recorded, due to an external magnetic field applied. In one embodiment, a pole expanded part prone to occurrence of magnetic saturation is formed so as to prevent magnetic fluxes from being converged at ends of a return pole of a magnetic head.
摘要翻译： 由于施加了外部磁场，本发明的实施例避免了记录的信息丢失。 在一个实施例中，形成容易发生磁饱和的极扩展部分，以防止磁通量在磁头的返回极的端部收敛。
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6.发明授权公开(公告)号：US07468852B2
公开(公告)日：2008-12-23
申请号：US11417812
申请日：2006-05-03
申请人： Syuji Nishida , Ikuya Tagawa , Yasutaka Nishida , Satoshi Tabata
发明人： Syuji Nishida , Ikuya Tagawa , Yasutaka Nishida , Satoshi Tabata
IPC分类号： G11B5/09
CPC分类号： G11B5/024
摘要： Embodiments of the invention improve efficiency in alternating-current demagnetization of a magnetic recording medium. In specific embodiments, magnet fields in a direction slanting to an easy direction of magnetization of recording layer magnetization of a medium in rotation are applied.
摘要翻译： 本发明的实施例提高了磁记录介质的交流退磁的效率。 在具体实施例中，施加沿着旋转介质的记录层磁化的易磁化方向的方向的磁场。
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公开(公告)号：US07408738B2
公开(公告)日：2008-08-05
申请号：US11104977
申请日：2005-04-12
IPC分类号： G11B33/14
CPC分类号： G11B23/0042
摘要： Embodiments of the invention efficiently improve the stray field robustness without changing the size or weight of the drive on a large scale. Because a stray field concentrates on a magnetic field element, a symptom in which already recorded data is erased is prevented. According to one embodiment, in a magnetic recording system that uses a perpendicular recording medium having a soft magnetic under layer, a soft magnetic shield is provided on an upper part and a side of a slider on which a magnetic head is mounted, and a distance C between the shield and the medium is made smaller than a distance A or B between the shield and the slider.
摘要翻译： 本发明的实施例在不改变驱动器的尺寸或重量的情况下有效地提高了杂散场稳健性。 由于杂散场集中在磁场元件上，因此防止已经记录的数据被擦除的症状。 根据一个实施例，在使用具有软磁下层的垂直记录介质的磁记录系统中，在安装有磁头的滑块的上部和侧面上设置有软磁屏蔽，并且距离 屏蔽和介质之间的距离C小于屏蔽和滑块之间的距离A或B.
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8.发明申请公开(公告)号：US20060250716A1
公开(公告)日：2006-11-09
申请号：US11417812
申请日：2006-05-03
申请人： Syuji Nishida , Ikuya Tagawa , Yasutaka Nishida , Satoshi Tabata
发明人： Syuji Nishida , Ikuya Tagawa , Yasutaka Nishida , Satoshi Tabata
IPC分类号： G11B5/00
CPC分类号： G11B5/024
摘要： Embodiments of the invention improve efficiency in alternating-current demagnetization of a magnetic recording medium. In specific embodiments, magnet fields in a direction slanting to an easy direction of magnetization of recording layer magnetization of a medium in rotation are applied.
摘要翻译： 本发明的实施例提高了磁记录介质的交流退磁的效率。 在具体实施例中，施加沿着旋转介质的记录层磁化的易磁化方向的方向的磁场。
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公开(公告)号：US20080043358A1
公开(公告)日：2008-02-21
申请号：US11890001
申请日：2007-08-03
申请人： Takeshi Nakagawa , Yasutaka Nishida , Ikuya Tagawa
发明人： Takeshi Nakagawa , Yasutaka Nishida , Ikuya Tagawa
IPC分类号： G11B5/09
CPC分类号： G11B5/02 , G11B2005/001
摘要： Embodiments of the present invention reduce lowering of a recording current and a recording magnetic field that might occur upon execution of write pre-compensation for compensating the NLTS according to a perpendicular magnetic recording method. According to one embodiment, the recording current overshoot is increased for recording a high NLTS recording data pattern. The read signal quality is improved, thereby a highly reliable magnetic disk can be provided.
摘要翻译： 本发明的实施例减少了在执行用于根据垂直磁记录方法补偿NLTS的写预补偿时可能发生的记录电流和记录磁场的降低。 根据一个实施例，增加记录电流过冲以记录高的NLTS记录数据模式。 读取信号质量得到改善，从而可以提供高度可靠的磁盘。
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公开(公告)号：US20050225895A1
公开(公告)日：2005-10-13
申请号：US11104977
申请日：2005-04-12
CPC分类号： G11B23/0042
摘要： Embodiments of the invention efficiently improve the stray field robustness without changing the size or weight of the drive on a large scale. Because a stray field concentrates on a magnetic field element, a symptom in which already recorded data is erased is prevented. According to one embodiment, in a magnetic recording system that uses a perpendicular recording medium having a soft magnetic under layer, a soft magnetic shield is provided on an upper part and a side of a slider on which a magnetic head is mounted, and a distance C between the shield and the medium is made smaller than a distance A or B between the shield and the slider.
摘要翻译： 本发明的实施例在不改变驱动器的尺寸或重量的情况下有效地提高了杂散场稳健性。 由于杂散场集中在磁场元件上，因此防止已经记录的数据被擦除的症状。 根据一个实施例，在使用具有软磁下层的垂直记录介质的磁记录系统中，在安装有磁头的滑块的上部和侧面上设置有软磁屏蔽，并且距离 屏蔽和介质之间的距离C小于屏蔽和滑块之间的距离A或B.
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