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公开(公告)号：US07061726B2
公开(公告)日：2006-06-13
申请号：US10667232
申请日：2003-09-18
IPC分类号： G11B5/127
CPC分类号： G11B5/3916
摘要： A magnetic material having a low coefficient of thermal expansion of 11.5×10−6/K or less is used for forming at least one of a lower shield or an upper shield. A laminated film comprising a layer of the magnetic material having a low coefficient of thermal expansion of 11.5×10−6/K or less, and an 80 wt % NiFe alloy layer, is used for forming at least one of the lower shield and the upper shield. Thus, the thin film magnetic head having reduced after-record noise and reduced thermal protrusion can be obtained.
摘要翻译： 使用具有11.5×10 -6 / K或更小的热膨胀系数低的磁性材料来形成下屏蔽或上屏蔽中的至少一个。 使用包含具有11.5×10 -6 / K以下的低热膨胀系数的磁性材料层和80重量％的NiFe合金层的层叠膜，以形成至少一个 的下屏蔽和上屏蔽。 因此，可以获得具有降低的记录后噪声和降低的热突起的薄膜磁头。
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2.发明授权Magnetic head for reducing projection of retrieving and writing unit from float surface, and magnetic recording/retrieving apparatus using the same 失效用于减小浮体表面上取出和写入单元的投影的磁头，以及使用其的磁记录/回收装置公开(公告)号：US07064925B2
公开(公告)日：2006-06-20
申请号：US10656582
申请日：2003-09-05
CPC分类号： G11B5/3136 , G11B5/3106 , G11B5/6005
摘要： A magnetic head comprises a retrieving unit for converting magnetic information output from a recording medium into an electric signal, a writing unit having the function of electromagnetic conversion for writing the magnetic information in the recording medium in response to the electric signal, and a first protective film formed on the retrieving unit. A second protective film is formed on the first protective film. The coefficient of linear expansion of the second protective film is reduced in comparison with that of the first protective film. Furthermore, the first protective film is an alumina film; in contrast, the second protective film is a film made of an alumina film containing silicon oxide therein.
摘要翻译： 磁头包括用于将从记录介质输出的磁信息转换为电信号的检索单元，具有电磁转换功能的写入单元，用于响应于电信号将磁信息写入记录介质中;以及第一保护 在检索单元上形成的胶片。 在第一保护膜上形成第二保护膜。 与第一保护膜相比，第二保护膜的线膨胀系数降低。 此外，第一保护膜是氧化铝膜; 相反，第二保护膜是由其中含有氧化硅的氧化铝膜制成的膜。
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3.发明授权Magnetic disc apparatus with thin film head suitable for high-density recording 失效具有适用于高密度记录的薄膜头的磁盘装置
公开(公告)号：US5296979A
公开(公告)日：1994-03-22
申请号：US963039
申请日：1992-10-19
申请人： Takashi Kawabe , Moriaki Fuyama , Shinji Narishige , Masatoshi Tsuchiya , Eiji Ashida , Makoto Morijiri , Hideki Yamazaki , Yutaka Sugita , Hiroshi Fukui , Tadayuki Iwakura , Makoto Aihara , Makoto Saito , Shunichiro Kuwatsuka , Hiroshi Ikeda , Yokuo Saitoh
发明人： Takashi Kawabe , Moriaki Fuyama , Shinji Narishige , Masatoshi Tsuchiya , Eiji Ashida , Makoto Morijiri , Hideki Yamazaki , Yutaka Sugita , Hiroshi Fukui , Tadayuki Iwakura , Makoto Aihara , Makoto Saito , Shunichiro Kuwatsuka , Hiroshi Ikeda , Yokuo Saitoh
CPC分类号： G11B5/012 , G11B5/3116
摘要： A magnetic disc apparatus includes a magnetic disc for recording information; a thin film magnetic head including a magnetic pole structure having an upper magnetic pole tip and a lower magnetic pole tip arranged to provide a magnetic gap at respective end portions thereof for writing and reading information in and from the magnetic disc; a device for rotating the magnetic disc; and a device for positioning the thin film magnetic head; the upper and lower magnetic pole tips having different contours at the respective end portions as viewed from a side confronting the magnetic disc wherein the difference (.DELTA.CW in .mu.m) in the width, along the magnetic gap, of the upper magnetic pole tip and the width, along the magnetic gap, of the lower magnetic pole tip satisfies the relation0
摘要翻译： 磁盘装置包括用于记录信息的磁盘; 包括具有上磁极端头和下磁极端头的磁极结构的薄膜磁头，其布置成在其各个端部处提供磁隙以在磁盘中写入和读取信息; 用于旋转磁盘的装置; 以及用于定位薄膜磁头的装置; 所述上磁极尖端和下磁极尖在相应端部处具有不同的轮廓，从与磁盘相对的一侧观察，其中沿着上部的磁隙的宽度（（delta）CW）（（m））） 磁极尖端和下磁极尖端的磁隙的宽度满足磁道密度Tr为每英寸1800或更多磁道的磁盘的关系0 <（Delta）CW <= 5000 / Tr。
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4.发明授权Thin film magnetic head for high density recording and having a leading side magnetic pole piece of variable width at the media facing surface 有权用于高密度记录的薄膜磁头并且在介质面向表面具有可变宽度的前端磁极片公开(公告)号：US07821737B2
公开(公告)日：2010-10-26
申请号：US11486802
申请日：2006-07-14
IPC分类号： G11B5/187
CPC分类号： G11B5/3163 , G11B5/3116 , G11B5/3967
摘要： Embodiments of the invention provide a thin film magnetic head suitable for high density recording having a small erase band ΔE and a small fringe magnetic field, and a large recording magnetic field. In one embodiment, a width LW of a lower magnetic pole piece protuberance of a leading side magnetic pole piece, at a face in contact with a write gap layer, is made smaller than a width TW of an upper magnetic pole piece front layer of a trailing side magnetic pole piece, at a face in contact with the write gap layer, and the width of the lower magnetic pole piece protuberance adjacent to the write gap layer is made larger, in a direction from the write gap layer.
摘要翻译： 本发明的实施例提供一种适用于高密度记录的薄膜磁头，其具有小的擦除带＆Dgr; E和小的边缘磁场以及大的记录磁场。 在一个实施例中，使前侧磁极片的下磁极片突起在与写间隙层接触的面处的宽度LW小于上述磁极片前层的宽度TW 在与写入间隙层接触的面处的后侧磁极片和与写入间隙层相邻的下部磁极片突起的宽度在从写入间隙层的方向上变大。
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公开(公告)号：US07142392B2
公开(公告)日：2006-11-28
申请号：US11002498
申请日：2004-12-03
申请人： Shigekazu Ohtomo , Moriaki Fuyama , Nobuo Yoshida , Hiroshi Fukui
发明人： Shigekazu Ohtomo , Moriaki Fuyama , Nobuo Yoshida , Hiroshi Fukui
IPC分类号： G11B5/147
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/012 , G11B5/3116 , G11B5/313 , G11B5/332 , G11B5/3903 , G11B5/3967 , G11B2005/3996
摘要： A thin film head having reading part and recording part having an upper magnetic pole front end layer and a lower magnetic pole having a lower magnetic main layer, a lower magnetic pole front end portion on the lower magnetic main layer, and a projection step portion on the lower magnetic pole front end portion. The upper magnetic pole front end layer has a magnetic pole expansion position and a length from an air bearing surface to the magnetic pole expansion position is less than a length from the air bearing surface to gap depth position of the lower magnetic pole front end portion.
摘要翻译： 具有读取部分的薄膜头和具有上磁极前端层的记录部分和具有下磁性主层的下磁极，下磁性主体层上的下磁极前端部分和在下磁性主体层上的突出台阶部分 下磁极前端部分。 上磁极前端层具有磁极膨胀位置，从空气支承面到磁极伸长位置的长度小于从下侧磁极前端部的空气轴承面到间隙深度位置的长度。
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公开(公告)号：US07142391B2
公开(公告)日：2006-11-28
申请号：US09943507
申请日：2001-08-31
申请人： Shigekazu Ohtomo , Moriaki Fuyama , Nobuo Yoshida , Hiroshi Fukui
发明人： Shigekazu Ohtomo , Moriaki Fuyama , Nobuo Yoshida , Hiroshi Fukui
IPC分类号： G11B5/147
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/012 , G11B5/3116 , G11B5/313 , G11B5/332 , G11B5/3903 , G11B5/3967 , G11B2005/3996
摘要： A lower magnetic pole front end portion is provided on a lower magnetic pole main layer, and then, an upper magnetic pole front end portion or an upper magnetic pole front end layer is formed on the flat surface so as to enhance the track width accuracy of thin film head. The height of the lower magnetic pole front end portion is increased so as to enhance the magnetic field intensity. A projection step portion having a width larger than that of the upper magnetic pole front end layer is provided on the lower magnetic pole front end portion. The unnecessary medium in-plane magnetic field can be thus reduced in the off-track position. The respective parts of the head are corrected, thereby realizing a high recording magnetic field intensity exceeding 716 kA/m (9000Oe).
摘要翻译： 下磁极前端部设置在下磁极主层上，然后在平面上形成上磁极前端部或上磁极前端层，以提高轨道宽度精度 薄膜头。 下磁极前端部的高度增加，从而提高磁场强度。 具有比上磁极前端层宽的宽度的突出台阶部分设置在下磁极前端部分上。 因此，在离轨位置上可以减少不必要的介质平面内磁场。 头部的各部分被校正，从而实现超过716kA / m（9000Oe）的高记录磁场强度。
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公开(公告)号：US07042677B2
公开(公告)日：2006-05-09
申请号：US10666876
申请日：2003-09-18
申请人： Shigekazu Ohtomo , Hiroshi Fukui , Nobuo Yoshida
发明人： Shigekazu Ohtomo , Hiroshi Fukui , Nobuo Yoshida
IPC分类号： G11B5/147
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/3113 , G11B5/3116 , G11B5/313 , G11B5/3146 , G11B5/332 , G11B5/3967 , G11B2005/3996
摘要： A protrusion 24 having a width Lpfw equal to or somewhat larger than a track width Tw and protruding to the air bearing surface is provided on a lower magnetic pole 5 or lower magnetic pole front end layer 19. The lower magnetic pole 5 or the lower magnetic pole front end layer 19 other than the protrusion is retracted by Lpfd from the air bearing surface 15. With the constitution, since the upper end surface 23 of the lower magnetic pole 5 or the lower magnetic pole to end layer 19 that generates the leakage magnetic fields in the off-track portions is not exposed to the air bearing surface 15, the leakage magnetic fields Hxz in the off-track portions can be decreased greatly.
摘要翻译： 在下磁极5或下磁极前端层19上设置有宽度Lpfw等于或略大于磁道宽度Tw并突出到空气轴承表面的突起24。 除了突起之外的下磁极5或下磁极前端层19从空气轴承表面15缩回Lpfd。 利用该结构，由于在偏离磁道部分中产生泄漏磁场的下磁极5的上端面23或下磁极至端层19不暴露于空气轴承表面15，因此泄漏磁 离轨部分的场Hxz可以大大降低。
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8.发明授权Thin film magnetic head having inductive write portion features that provide high recording field strength 失效具有提供高记录场强的感应写入部分特征的薄膜磁头公开(公告)号：US06791795B2
公开(公告)日：2004-09-14
申请号：US10219283
申请日：2002-08-16
申请人： Shigekazu Ohtomo , Moriaki Fuyama , Nobuo Yoshida , Hiroshi Fukui
发明人： Shigekazu Ohtomo , Moriaki Fuyama , Nobuo Yoshida , Hiroshi Fukui
IPC分类号： G11B5147
CPC分类号： G11B5/313 , G11B5/3109 , G11B5/3116 , G11B5/3146 , G11B5/3967 , Y10S977/934 , Y10S977/935
摘要： A lower magnetic pole front end layer is formed on a lower magnetic pole main layer, and a lower magnetic pole projection layer, a recording gap layer and an upper magnetic pole front end layer each having substantially the same planar shape are formed on a planar surface of the lower magnetic pole front end layer. Trimming of a lower electrode is not necessary, and track width accuracy can be drastically improved because a resist frame is formed on the planar surface. A length of the upper magnetic pole front end layer from an air bearing surface to a head rear direction is greater than a length of the lower magnetic pole front end layer, and the rear end portion of the lower magnetic pole front end layer substantially defines a gap depth.
摘要翻译： 在下磁极主层上形成下磁极前端层，在平面上形成有各自具有大致相同的平面形状的下磁极投影层，记录间隙层和上磁极前端层 的下磁极前端层。 不需要修整下电极，并且由于在平坦表面上形成抗蚀剂框架，所以可以显着提高轨道宽度精度。 上磁极前端层从空气轴承表面到头后方的长度大于下磁极前端层的长度，下磁极前端层的后端部分基本上限定为 间隙深度。
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9.发明授权公开(公告)号：US07460335B2
公开(公告)日：2008-12-02
申请号：US11415572
申请日：2006-05-01
IPC分类号： G11B5/60
CPC分类号： G11B5/3136 , G11B5/3106 , G11B5/6005
摘要： A magnetic head comprises a retrieving unit for converting magnetic information output from a recording medium into an electric signal, a writing unit having the function of electromagnetic conversion for writing the magnetic information in the recording medium in response to the electric signal, and a first protective film formed on the retrieving unit. A second protective film is formed on the first protective film. The coefficient of linear expansion of the second protective film is reduced in comparison with that of the first protective film. Furthermore, the first protective film is an alumina film; in contrast, the second protective film is a film made of an alumina film containing silicon oxide therein.
摘要翻译： 磁头包括用于将从记录介质输出的磁信息转换为电信号的检索单元，具有电磁转换功能的写入单元，用于响应于电信号将磁信息写入记录介质中;以及第一保护 在检索单元上形成的胶片。 在第一保护膜上形成第二保护膜。 与第一保护膜相比，第二保护膜的线膨胀系数降低。 此外，第一保护膜是氧化铝膜; 相反，第二保护膜是由其中含有氧化硅的氧化铝膜制成的膜。
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公开(公告)号：US5349745A
公开(公告)日：1994-09-27
申请号：US69586
申请日：1993-06-01
申请人： Takashi Kawabe , Eiji Ashida , Moriaki Fuyama , Tadayuki Iwakura , Hiroshi Fukui , Yoshikazu Tsuji , Shunichiro Kuwatsuka , Harunobu Saito , Yoshiki Hagiwara , Issei Takemoto , Masayasu Fujisawa
发明人： Takashi Kawabe , Eiji Ashida , Moriaki Fuyama , Tadayuki Iwakura , Hiroshi Fukui , Yoshikazu Tsuji , Shunichiro Kuwatsuka , Harunobu Saito , Yoshiki Hagiwara , Issei Takemoto , Masayasu Fujisawa
CPC分类号： G11B5/3116 , G11B5/3163 , Y10T29/49052
摘要： A method of fabricating a thin-film magnetic in which a mask pattern in etching a bottom pole is formed of first and second mask films in this order when viewed from the bottom pole, the first mask film is used for defining, by self-alignment, the length of that portion of the side edge of a top pole which is nearly perpendicular to a magnetic gap, the second mask film makes it possible to etch the bottom pole with high dimensional accuracy, a non-magnetic film is formed on the mask pattern having the bottom pole thereunder and the exposed region of a substrate, and the top pole is formed after the mask pattern has been exposed and removed.
摘要翻译： 一种制造薄膜磁性的方法，其中当从底极观察时，其中蚀刻底极中的掩模图案依次由第一和第二掩模膜形成，第一掩模膜用于通过自对准 ，几乎垂直于磁隙的顶极的侧边缘部分的长度，第二掩模膜使得可以以高尺寸精度蚀刻底极，在掩模上形成非磁性膜 具有底极的图案和基板的曝光区域，并且在掩模图案被曝光和去除之后形成顶极。
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