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1. 发明授权

US06751052B1 Thin film magnetic head with short lower magnetic pole piece 失效
标题翻译：薄膜磁头，具有较低的下磁极片
公开(公告)号：US06751052B1
公开(公告)日：2004-06-15
申请号：US09611009
申请日：2000-07-06
申请人： Ikuya Tagawa , Tomoko Kutsuzawa , Syuji Nishida , Teruo Kiyomiya , Yoshinori Ohtsuka , Hiroshi Maeda , Minoru Hasegawa , Masahiro Kakehi , Takashi Sekikawa , Yukinori Ikegawa
发明人： Ikuya Tagawa , Tomoko Kutsuzawa , Syuji Nishida , Teruo Kiyomiya , Yoshinori Ohtsuka , Hiroshi Maeda , Minoru Hasegawa , Masahiro Kakehi , Takashi Sekikawa , Yukinori Ikegawa
IPC分类号： G11B5147
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/00813 , G11B5/012 , G11B5/313 , G11B5/3967 , G11B2005/3996
摘要： A thin film magnetic head includes an upper and a lower magnetic pole layer extending forward from a central magnetic core within a thin film coil. A narrow upper and lower front magnetic pole piece are connected to the front ends of the upper and lower magnetic pole layer, respectively. The upper front magnetic pole piece extends rearward from its front end exposed at a medium-opposed surface. The lower front magnetic pole piece extends in a lateral direction along the medium-opposed surface by a lateral width larger than that of the upper front magnetic pole piece. The lower front magnetic pole piece extends rearward from the medium-opposed surface by a longitudinal length smaller than that of the upper front magnetic pole piece. The lower front magnetic pole piece serves to concentrate the magnetic flux at the front ends of the upper and lower front magnetic pole pieces. Since the lower front magnetic pole piece is designed to have a larger lateral width in the lateral direction irrespective of a smaller length in the longitudinal direction, the production of the lower front magnetic pole piece can remarkably be facilitated.
摘要翻译：薄膜磁头包括从薄膜线圈内的中心磁芯向前延伸的上磁极层和下磁极层。一个窄的上，下前磁极片分别连接到上磁极层和下磁极层的前端。上前磁极片从其在中间相对表面处暴露的前端向后延伸。下部前磁极片沿着中间相对表面沿横向宽度大于上部前磁极片的横向宽度延伸。下部前磁极片从介质相对表面向后延伸的纵向长度小于上部前磁极片的纵向长度。下部前磁极片用于将磁通集中在上，前前磁极片的前端。由于下侧前磁极片被设计成在横向方向上具有较大的横向宽度，而与长度方向上的较短长度无关，因此可以显着地促进下部前磁极片的制造。

2. 发明授权

US06813824B2 Method of producing thin film magnetic head 失效
标题翻译：制造薄膜磁头的方法
公开(公告)号：US06813824B2
公开(公告)日：2004-11-09
申请号：US10328542
申请日：2002-12-23
申请人： Minoru Hasegawa , Yoshinori Ohtsuka , Yuji Uehara , Takashi Sekikawa , Hiroshi Maeda , Masahiro Kakehi , Ikuya Tagawa , Tomoko Kutsuzawa , Syuji Nishida
发明人： Minoru Hasegawa , Yoshinori Ohtsuka , Yuji Uehara , Takashi Sekikawa , Hiroshi Maeda , Masahiro Kakehi , Ikuya Tagawa , Tomoko Kutsuzawa , Syuji Nishida
IPC分类号： G11B5127
CPC分类号： G11B5/313 , G11B5/17 , G11B5/3163 , Y10T29/49034 , Y10T29/49041 , Y10T29/49046 , Y10T29/49048 , Y10T29/49052 , Y10T29/49073
摘要： A liquid resist is introduced between adjacent conductive lines of a coil pattern girdling around a magnetic core piece. When the liquid resist is cured, an insulating resin filler can be fixed between the adjacent conductive lines of the coil pattern. An insulating metallic layer is formed to extend over the insulting resin filler and the conductive lines of the coil pattern. Thereafter, the insulating metallic layer is subjected to a flattening grinding treatment until at least a part of the conductive line is exposed at a flattened surface. Of the resist, of a higher fluidity, penetrates in every hole and corner between the adjacent conductive lines, the gap defined between the adjacent conductive lines is fully filled with the insulating material. No voids remain in the gap. The conductive line of the coil can be reliably prevented from corrosion or oxidation. Moreover, a relatively brittle of fragile insulating resin filler is reliably prevented from being subjected to the flattening.

3. 发明授权

US06567239B1 Thin film magnetic head including a coil insulating resin filler and an insulating metallic layer covering at least partly the insulating resin filler on a datum plane 失效
标题翻译：薄膜磁头包括线圈绝缘树脂填料和至少部分地覆盖基准平面上的绝缘树脂填料的绝缘金属层
公开(公告)号：US06567239B1
公开(公告)日：2003-05-20
申请号：US09716345
申请日：2000-11-20
申请人： Minoru Hasegawa , Yoshinori Ohtsuka , Yuji Uehara , Takashi Sekikawa , Hiroshi Maeda , Masahiro Kakehi , Ikuya Tagawa , Tomoko Kutsuzawa , Syuji Nishida
发明人： Minoru Hasegawa , Yoshinori Ohtsuka , Yuji Uehara , Takashi Sekikawa , Hiroshi Maeda , Masahiro Kakehi , Ikuya Tagawa , Tomoko Kutsuzawa , Syuji Nishida
IPC分类号： G11B5147
CPC分类号： G11B5/313 , G11B5/17 , G11B5/3163 , Y10T29/49034 , Y10T29/49041 , Y10T29/49046 , Y10T29/49048 , Y10T29/49052 , Y10T29/49073
摘要： A liquid resist is introduced between adjacent conductive lines of a coil pattern girdling around a magnetic core piece. When the liquid resist is cured, an insulating resin filler can be fixed between the adjacent conductive lines of the coil pattern. An insulating metallic layer is formed to extend over the insulting resin filler and the conductive lines of the coil pattern. Thereafter, the insulating metallic layer is subjected to a flattening grinding treatment until at least a part of the conductive line is exposed at a flattened surface. Since the liquid of the resist, of a higher fluidity, penetrates in every hole and corner between the adjacent conductive lines, the gap defined between the adjacent conductive lines is fully filled with the insulating material. No voids remain in the gap. The conductive line of the coil can be reliably prevented from corrosion or oxidation. Moreover, a relatively brittle of fragile insulating resin filler is reliably prevented from being subjected to the flattening grinding treatment.
摘要翻译：在围绕磁芯片的线圈图案的相邻导线之间引入液体抗蚀剂。当液体抗蚀剂固化时，可以在线圈图案的相邻导电线之间固定绝缘树脂填料。绝缘金属层形成为在绝缘树脂填料和线圈图案的导线上延伸。此后，对绝缘金属层进行平坦化研磨处理，直到导电线的至少一部分在平坦表面露出。由于具有较高流动性的抗蚀剂的液体渗透在相邻导电线之间的每个孔和拐角处，所以相邻导电线之间限定的间隙被绝缘材料完全充满。间隙中没有空隙。可以可靠地防止线圈的导线腐蚀或氧化。此外，可靠地防止相对脆弱的脆性绝缘树脂填料进行平坦化研磨处理。

4. 发明申请

US20050135006A1 Magnetic head 审中-公开
标题翻译：磁头
公开(公告)号：US20050135006A1
公开(公告)日：2005-06-23
申请号：US11063115
申请日：2005-02-22
申请人： Ikuya Tagawa , Hideyuki Akimoto , Tomoko Kutsuzawa , Syuji Nishida
发明人： Ikuya Tagawa , Hideyuki Akimoto , Tomoko Kutsuzawa , Syuji Nishida
IPC分类号： G11B5/127
CPC分类号： G11B5/127
摘要： A magnetic head increases the magnetic field strength just below a write gap 14 and thereby improves the recording resolution of a medium. To do so, an upper magnetic pole 10 and a lower magnetic pole 12 are disposed facing one another with the write gap 14 in between, with an end surface of the lower magnetic pole 12 being I-shaped and an end surface of the upper magnetic pole being T-shaped due to the upper magnetic pole 10 being formed of a first upper magnetic pole 10a that is disposed facing the lower magnetic pole 12 and is formed in an I shape that is shorter than the lower magnetic pole 12 and a second upper magnetic pole 10b that is joined to the first upper magnetic pole 10a and is formed wider than the first upper magnetic pole 10a.
摘要翻译：磁头使写入间隙14正下方的磁场强度增加，从而提高介质的记录分辨率。为此，上磁极10和下磁极12彼此面对地设置有写间隙14，其中下磁极12的端面为I形，上磁极的端面由于上磁极10由与第一上磁极10a形成的T形形成为T形，所述第一上磁极10a设置成面对下磁极12并形成为比下磁极12短的I形，上磁极10b，其连接到第一上磁极10a并形成为比第一上磁极10a更宽。

5. 发明申请

US20060250716A1 Method of demagnetizing magnetic recording medium and apparatus for carrying out same 有权
标题翻译：磁记录介质的去磁方法及其执行方法
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。

6. 发明授权

US06507448B2 Information recording device having a function of erasing information in a standby state 失效
标题翻译：具有在待机状态下擦除信息的功能的信息记录装置
公开(公告)号：US06507448B2
公开(公告)日：2003-01-14
申请号：US09736826
申请日：2000-12-14
申请人： Syuji Nishida , Ikuya Tagawa , Yuji Uehara
发明人： Syuji Nishida , Ikuya Tagawa , Yuji Uehara
IPC分类号： G11B503
CPC分类号： G11B5/02 , G11B5/012 , G11B5/024 , G11B5/09 , G11B19/02 , G11B2005/0013
摘要： An information recording device which records information at a high recording density such that an error rate is reduced. In particular, an information recording device that includes a recording head, arranged near or to be close to the recording medium, for applying magnetic fields to the small regions when the recording head relatively moves with respect to the recording medium to pass on the small regions of the recording medium, and a recording head controller for controlling the recording head to cause the recording head to apply magnetic fields to the small regions in a free region of the recording medium in a standby state in which at least information is not recorded on the recording medium to uniform the directions of magnetization of the small regions so as to erase the information in the predetermined free region.
摘要翻译：一种以高记录密度记录信息以使错误率降低的信息记录装置。具体地说，一种信息记录装置，包括靠近或靠近记录介质的记录头，用于当记录头相对于记录介质相对移动以在小区域上时向小区域施加磁场以及记录头控制器，用于控制记录头，以使得记录头在至少信息未被记录在记录介质的待机状态的待机状态下向记录介质的自由区域中的小区域施加磁场记录介质以使小区域的磁化方向均匀，从而擦除预定自由区域中的信息。

7. 发明申请

US20060139815A1 Thin film magnetic head 失效
标题翻译：薄膜磁头
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
IPC分类号： G11B5/33 , G11B5/127
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。

8. 发明授权

US06624972B1 Magnetic head, method of manufacturing magnetic head and information recording apparatus 失效
标题翻译：磁头，制造磁头的方法和信息记录装置
公开(公告)号：US06624972B1
公开(公告)日：2003-09-23
申请号：US09652736
申请日：2000-08-31
申请人： Syuji Nishida , Ikuya Tagawa
发明人： Syuji Nishida , Ikuya Tagawa
IPC分类号： G11B5147
CPC分类号： G11B5/3146 , G11B5/1878 , G11B5/2455 , G11B5/312 , G11B5/313
摘要： A magnetic head has a lower sub-magnetic pole and an upper sub-magnetic pole disposed to be adjacent to a moving magnetic disk. The lower sub-magnetic pole and the upper sub-magnetic pole are placed adjacent one another with a predetermined interval at an adjacent point to the magnetic disk. A magnetic field is generated between those magnetic poles so that the magnetic disk is magnetized. A soft magnetic film extending between the magnetic poles and a first non-magnetic film and a second non-magnetic film supporting the soft magnetic film are disposed between the magnetic poles.
摘要翻译：磁头具有设置成与移动磁盘相邻的下子磁极和上子磁极。下部子磁极和上部子磁极在与磁盘相邻的点处以预定的间隔彼此相邻放置。在这些磁极之间产生磁场，使得磁盘被磁化。在磁极之间设置有在磁极和第一非磁性膜之间延伸的软磁性膜和支撑软磁性膜的第二非磁性膜。

9. 发明授权

US07518825B2 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
标题翻译：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
IPC分类号： G11B5/10 , G11B5/187
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。

10. 发明授权

US07468852B2 Method of demagnetizing magnetic recording medium and apparatus for carrying out same 有权
标题翻译：磁记录介质的去磁方法及其执行方法
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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