公开(公告)号：US5241440A

公开(公告)日：1993-08-31

申请号：US908607

申请日：1992-06-29

申请人： Eizi Ashida ,  Moriaki Fuyama ,  Hideki Yamazaki ,  Shinji Narishige ,  Makoto Morijiri ,  Takashi Kawabe ,  Shunichiro Kuwatsuka ,  Saburo Suzuki ,  Eisei Togawa

发明人： Eizi Ashida ,  Moriaki Fuyama ,  Hideki Yamazaki ,  Shinji Narishige ,  Makoto Morijiri ,  Takashi Kawabe ,  Shunichiro Kuwatsuka ,  Saburo Suzuki ,  Eisei Togawa

IPC分类号： G11B5/31

CPC分类号： G11B5/313 ,  G11B5/3163

摘要： A thin film magnetic head including conductor coils, a plurality of insulating layers to interpose and insulate the conductor coils and a magnetic gap layer between upper and lower magnetic cores, in which another insulating layer is provided on a stepped region formed by end faces of the plurality of insulating layers.

摘要翻译： 一种薄膜磁头，包括导体线圈，多个绝缘层，用于将导体线圈插入并绝缘，以及在上下磁芯之间的磁隙层，其中另一绝缘层设置在由 多个绝缘层。

公开(公告)号：US4550353A

公开(公告)日：1985-10-29

申请号：US559083

申请日：1983-12-07

申请人： Osamu Hirai ,  Tetsuo Kobayashi ,  Shunichiro Kuwatsuka ,  Saburo Suzuki

发明人： Osamu Hirai ,  Tetsuo Kobayashi ,  Shunichiro Kuwatsuka ,  Saburo Suzuki

IPC分类号： G11B5/31 ,  G11B5/12

CPC分类号： G11B5/3153 ,  G11B5/3116 ,  G11B5/3163 ,  Y10T29/49044 ,  Y10T29/49046

摘要： A thin-film magnetic head having a magnetic core of double step structure and a method of fabricating it. A first magnetic core is formed on a substrate, which has a predetermined thickness at a pole chip region thereof and a thickness larger than the predetermined thickness at a back region thereof; a magnetic gap is formed thereon, a conductor coil is formed on the magnetic gap, which is encircled by an inter-layer, insulating film; a first magnetic film is formed thereon, which constitutes one layer of a second magnetic core and is connected with the first magnetic core at the back region; and a second magnetic film is formed thereon through an inorganic insulating film, which constitutes another layer of the second magnetic core and is removed at the pole chip region. When the second magnetic film is removed, the inorganic insulating film serves to protect the first magnetic film, and hence the thickness of the first magnetic film is maintained unvaried. Thus, there is obtained the thin-film magnetic head having a magnetic film which is of a predetermined thickness at the pole chip region and a thickness larger than the predetermined thickness at the back region.This structure enhances the conversion efficiency of the head as well as boosts the resolution for reproduction and relaxes the magnetization saturation for recording.

摘要翻译： 一种具有双层结构的磁芯的薄膜磁头及其制造方法。 第一磁芯形成在基板上，该基板在其极片区域具有预定厚度，并且在其后部区域具有大于预定厚度的厚度; 在其上形成磁隙，在由间隔绝缘膜包围的磁隙上形成导体线圈; 在其上形成第一磁性膜，其构成一层第二磁芯并且在后部区域处与第一磁芯连接; 并且通过无机绝缘膜在其上形成第二磁性膜，该无机绝缘膜构成第二磁芯的另一层，并在极性芯片区域被去除。 当除去第二磁性膜时，无机绝缘膜用于保护第一磁性膜，因此第一磁性膜的厚度保持不变。 因此，获得了在磁极片区域具有预定厚度的磁性膜，并且在后部区域具有大于预定厚度的厚度的薄膜磁头。 这种结构提高了磁头的转换效率，并提高了再现的分辨率，并且放松了用于记录的磁化饱和度。

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

IPC分类号： G11B5/012 ,  G11B5/31

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。

公开(公告)号：US4841624A

公开(公告)日：1989-06-27

申请号：US142696

申请日：1988-01-11

申请人： Eisei Togawa ,  Saburo Suzuki ,  Kenji Sugimoto ,  Shunichiro Kuwatsuka

发明人： Eisei Togawa ,  Saburo Suzuki ,  Kenji Sugimoto ,  Shunichiro Kuwatsuka

IPC分类号： G11B5/31

CPC分类号： G11B5/3163 ,  Y10T29/49044 ,  Y10T29/49064

摘要： A method of producing a thin film magnetic head by successively depositing on a substrate a first magnetic material, a gap material, an electrically conductive material consisting of a coil, an insulating film, a second magnetic material and a protecting film, wherein the improvement comprises a step for forming a recessed portion in the insulating film at a portion corresponding to a gap portion on the air bearing surface side, the bottom surface of said recessed portion serving as an exposed portion on the upper surface of the gap material and the side surfaces of said recessed portion being tapered, a step for forming a recessed portion in the gap material by etching using the insulating film with the recessed portion as a mask and making the thickness thereof equal to the gap length, and a step for depositing a second magnetic material on the whole surface, so that the recessed portion formed in the gap material will have a rectangular shape with its one side being equal to a gap depth and its another side being equal to a track width. Unlike the conventional art, no thick photoresist film is used in a step for determining the gap depth and the track width, making it possible to obtain a thin film magnetic head having a small gap depth and a narrow track width maintaining high precision.

摘要翻译： 一种通过在基板上依次沉积第一磁性材料，间隙材料，由线圈，绝缘膜，第二磁性材料和保护膜组成的导电材料制造薄膜磁头的方法，其中改进包括 在与空气轴承面侧的间隙部对应的部分，在绝缘膜上形成凹部的工序，作为上述间隙材料的上表面的露出部的上述凹部的底面， 所述凹陷部分是锥形的，通过使用具有凹陷部分作为掩模的绝缘膜进行蚀刻并使其厚度等于间隙长度来形成间隙材料中的凹陷部分的步骤，以及用于沉积第二磁体 材料在整个表面上，使得形成在间隙材料中的凹陷部分将具有矩形形状，其一侧等于间隙d epth，另一边等于轨道宽度。 与传统技术不同，在用于确定间隙深度和轨道宽度的步骤中不使用厚的光致抗蚀剂膜，使得可以获得具有小间隙深度和窄轨道宽度的薄膜磁头，从而保持高精度。

公开(公告)号：US4841402A

公开(公告)日：1989-06-20

申请号：US004623

申请日：1987-01-20

申请人： Tadashi Imanaka ,  Masayuki Takagi ,  Eisei Togawa ,  Harunobu Saito ,  Sadanori Nagaike ,  Masaki Ohura ,  Saburo Suzuki ,  Tetsuo Kobayashi ,  Shunichiro Kuwatsuka

发明人： Tadashi Imanaka ,  Masayuki Takagi ,  Eisei Togawa ,  Harunobu Saito ,  Sadanori Nagaike ,  Masaki Ohura ,  Saburo Suzuki ,  Tetsuo Kobayashi ,  Shunichiro Kuwatsuka

IPC分类号： G11B5/17 ,  G11B5/31

CPC分类号： G11B5/17 ,  G11B5/31 ,  Y10T29/49044 ,  Y10T29/49062 ,  Y10T29/49064

摘要： A thin film magnetic head having two conductor layers provided within a magnetic circuit constituted by a first and a second magnetic member. The magnetic circuit has, at the side to which a recording medium is opposed, a portion where the first and second magnetic members are opposed to each other over a length substantially equal to a gap depth, intervening a non-magnetic gap member therebetween, and a portion ahead thereof where they are connected with each other. The edge of the gap member constitutes an aperture of the magnetic circuit. The thin film magnetic head arranged as above permits a high density recording without reducing its production yield.

摘要翻译： 一种薄膜磁头，其具有设置在由第一和第二磁性构件构成的磁路内的两个导体层。 所述磁路在与记录介质相对的一侧具有第一和第二磁性构件在基本上等于间隙深度的长度上彼此相对的部分，其间插入非磁性间隙构件，以及 在它们之前的部分，它们彼此连接。 间隙构件的边缘构成磁路的孔​​。 如上所述布置的薄膜磁头允许高密度记录而不降低其产量。

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

IPC分类号： G11B5/31 ,  G11B5/42

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。

公开(公告)号：US5245493A

公开(公告)日：1993-09-14

申请号：US495908

申请日：1990-03-20

申请人： Takashi Kawabe ,  Moriaki Fuyama ,  Shinji Narishige ,  Eizi Ashida ,  Makoto Morijiri ,  Masanori Tanabe ,  Hiroshi Fukui ,  Yutaka Sugita ,  Hiroshi Ikeda ,  Masaaki Hayashi ,  Kazuo Nakagoshi ,  Kanji Kawakami ,  Yokuo Saitoh ,  Shunichiro Kuwatsuka

发明人： Takashi Kawabe ,  Moriaki Fuyama ,  Shinji Narishige ,  Eizi Ashida ,  Makoto Morijiri ,  Masanori Tanabe ,  Hiroshi Fukui ,  Yutaka Sugita ,  Hiroshi Ikeda ,  Masaaki Hayashi ,  Kazuo Nakagoshi ,  Kanji Kawakami ,  Yokuo Saitoh ,  Shunichiro Kuwatsuka

IPC分类号： G11B5/012 ,  G11B5/31 ,  G11B5/39

CPC分类号： G11B5/3919 ,  G11B5/012 ,  G11B5/3116 ,  G11B5/313 ,  G11B5/3163 ,  G11B5/3903 ,  G11B5/3967

摘要： A magnetic head for reading from and/or writing to a magnetic information storage medium has a substrate on which a plurality of thin films are formed in sequence. The films provide a magnetic circuit having a magnetic gap, a bottom pole piece and a top pole piece overlying said bottom pole piece. The top pole piece is formed as a tip portion adjoining the magnetic gap and a rear portion which makes magnetic contact with the tip portion. The rear portion is formed in the sequence after the tip portion. To ensure accurate thickness and width of the tip portion, a non-magnetic protective film is formed on the tip portion after the tip portion is formed and before the rear portion is formed.

公开(公告)号：US4824731A

公开(公告)日：1989-04-25

申请号：US149560

申请日：1988-01-28

申请人： Haruhiko Matsuyama ,  Fusaji Shoji ,  Shunichiro Kuwatsuka ,  Kenji Sugimoto

发明人： Haruhiko Matsuyama ,  Fusaji Shoji ,  Shunichiro Kuwatsuka ,  Kenji Sugimoto

IPC分类号： C08G73/10 ,  G11B5/31 ,  H01B3/30 ,  G11B5/40

CPC分类号： C08G73/1042 ,  C08G73/1007 ,  G11B5/3163 ,  H01B3/306 ,  Y10S428/90 ,  Y10T428/1193 ,  Y10T428/31721

摘要： A thin film magnetic head of which the insulation layer is made of a polyimide resin obtained by heat-curing a polyimide precursor represented by the following general formula (I) or (II) or a mixture thereof not only has excellent characteristics with respect to the insulation layer, i.e. satisfactory flatness, high glass transition temperature and excellent adhesiveness but also is free from film defects, i.e., exhibits high reliability: ##STR1## wherein R is, e.g., ##STR2## Ar.sup.1 is, e.g., ##STR3## Ar.sup.2 is, e.g. ##STR4## n is an integer of 1 to 100, and m is an integer of 10 to 500.

摘要翻译： 一种薄膜磁头，其绝缘层由通过热固化由以下通式（I）或（II）表示的聚酰亚胺前体或其混合物获得的聚酰亚胺树脂制成，不仅具有优异的相对于 绝缘层，即令人满意的平坦度，高玻璃化转变温度和优异的粘合性，但也没有膜缺陷，即表现出高可靠性：其中R是例如< 图像> Ar1是，例如， Ar2是例如 n为1〜100的整数，m为10〜500的整数。