公开(公告)号：US06256171B1

公开(公告)日：2001-07-03

申请号：US08937183

申请日：1997-09-29

申请人： Hiroaki Yoda ,  Akio Hori ,  Yuichi Ohsawa ,  Masashi Sahashi ,  Masatoshi Yoshikawa ,  Miki Mori

发明人： Hiroaki Yoda ,  Akio Hori ,  Yuichi Ohsawa ,  Masashi Sahashi ,  Masatoshi Yoshikawa ,  Miki Mori

IPC分类号： G11B539

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/10 ,  G11B5/105 ,  G11B5/3106 ,  G11B5/3967 ,  G11B5/40 ,  G11B2005/3996 ,  Y10S977/934

摘要： A thin film magnetic head has a reproducing element or/and recording element which is held from the direction of its thickness between a first ceramic substrate and a second ceramic substrate. The reproducing element or/and recording element is positioned at substantially the center with respect to the direction of track width. The first and second ceramic substrates hold the reproducing element or/and recording element from, for example, the direction of track width. The reproducing element or/and recording element is provided with a yoke type reproducing part which has at least one pair of magnetic cores with a magnetic gap therebetween on the side of a medium opposed face and a magnetoresistance effect element to which a signal magnetic flux from a magnetic recording medium is led through the pair of magnetic cores. Heat due to a sense current and heat due to the contact between the reproducing element or/and recording element and the magnetic recording medium are efficiently dissipated to the first and second ceramic substrates, thereby retarding a temperature increase of the reproducing element or/and recording element. Abrasion in the neighborhood of the reproducing element or/and recording element is retarded by the first and second ceramic substrates. A magnetic recording apparatus is provided with a magnetic recording medium, and a magnetic head slider having the thin film magnetic head described above.

摘要翻译： 薄膜磁头具有从第一陶瓷基板和第二陶瓷基板之间的厚度方向保持的再现元件或/和记录元件。 再现元件或/和记录元件相对于轨道宽度的方向基本上位于中心。 第一和第二陶瓷衬底从例如轨道宽度的方向保持再现元件或/和记录元件。 再现元件或/和记录元件设置有磁轭式再现部件，该磁轭式再现部件在介质相对面侧具有至少一对磁芯，其间具有磁隙，并且磁阻效应元件具有来自 磁记录介质被引导通过一对磁芯。 由于由于再现元件或/和记录元件与磁记录介质之间的接触而产生的感测电流和热的热量被有效地耗散到第一和第二陶瓷基板，从而延迟再现元件的温度升高或/和记录 元件。 在再现元件或/和记录元件附近的磨损被第一和第二陶瓷衬底延迟。 具有磁记录介质的磁记录装置和具有上述薄膜磁头的磁头滑块。

公开(公告)号：US6115216A

公开(公告)日：2000-09-05

申请号：US780328

申请日：1997-01-08

申请人： Hiroaki Yoda ,  Atsuhito Sawabe ,  Hitoshi Iwasaki ,  Naoyuki Inoue ,  Akio Hori

发明人： Hiroaki Yoda ,  Atsuhito Sawabe ,  Hitoshi Iwasaki ,  Naoyuki Inoue ,  Akio Hori

IPC分类号： G11B5/31 ,  G11B5/39 ,  G11B5/33 ,  G11B5/265

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3929 ,  G11B5/3967 ,  G11B2005/3996 ,  G11B5/3116 ,  G11B5/3163

摘要： A magnetoresistance effect type head comprises a magnetoresistance effect film having a pair of leads connected thereto and possessing a magnetic field responding part and a pair of upper and lower shield layers having a magnetoresistance effect film nipped therebetween through the medium of a magnetic gap-forming insulating film. This magnetoresistance effect type head satisfies the relations, W.sub.s

摘要翻译： 磁阻效应型头包括具有连接到其上的一对引线并具有磁场响应部分的磁阻效应膜，以及一对具有磁阻效应膜的上下屏蔽层，其间通过磁隙形成绝缘体 电影。 该磁阻效应型磁头满足Ws

公开(公告)号：US4845000A

公开(公告)日：1989-07-04

申请号：US939292

申请日：1986-12-04

申请人： Yoshikatsu Takeoka ,  Nobuaki Yasuda ,  Akio Hori ,  Norio Ozawa

发明人： Yoshikatsu Takeoka ,  Nobuaki Yasuda ,  Akio Hori ,  Norio Ozawa

IPC分类号： G11B7/241 ,  G11B7/26 ,  G11B23/00

CPC分类号： G11B7/26 ,  G11B23/0057 ,  G11B7/241 ,  G11B2007/24306 ,  G11B2007/2431 ,  G11B2007/24312 ,  G11B2007/24314 ,  G11B2007/24316 ,  G11B2007/24322 ,  G11B2007/24328 ,  G11B7/2531 ,  G11B7/256 ,  Y10S430/146 ,  Y10S430/165

摘要： A radiation-sensitive carrier body directly utilized as a stamper has a glass substrate, a first highly adhesive layer securely adhered to the substrate, a radiation-sensitive layer which discharges a gas component upon being irradiated with a laser beam and which locally forms a protuberance due to the absorbed energy, a second highly adhesive layer securely adhered to the specific material of the radiation-sensitive layer and which deforms in accordance with deformation of the layer, and a metal layer which has a high releasability to allow easy separation from a optical disk substrate material such as an acrylic material when the carrier body is used as a stamper substrate for manufacturing optical disks. A protuberance formed on the carrier body such as a continuous spiral protuberance allows formation of a corresponding spiral groove in the acrylic material, serving as a pre-track into which desired information will be digitally written by a user.

公开(公告)号：US06757143B2

公开(公告)日：2004-06-29

申请号：US10105342

申请日：2002-03-26

申请人： Tomomi Tunayama ,  Masayuki Takagishi ,  Kohichi Tateyama ,  Yuichi Ohsawa ,  Susumu Hashimoto ,  Michiko Hara ,  Akio Hori

发明人： Tomomi Tunayama ,  Masayuki Takagishi ,  Kohichi Tateyama ,  Yuichi Ohsawa ,  Susumu Hashimoto ,  Michiko Hara ,  Akio Hori

IPC分类号： G11B5127

CPC分类号： H01L27/228 ,  B82Y10/00 ,  B82Y25/00 ,  G11B5/3903 ,  G11B2005/3996 ,  H01F10/3268 ,  H01L27/224 ,  H01L43/08 ,  Y10T29/49044

摘要： In a magnetoresistive effect element, at least one of electrodes for supplying a current perpendicularly to the film plane of a magnetoresistive effect film is narrower than the distance between bias-applying films. The sensitivity of the magnetoresistive effect film is lower in regions thereof near the bias-applying films due to an intensive bias magnetic field from the bias-applying films. However, the electrodes are disposed in an inner region having a high sensitivity avoiding those regions with a lower sensitivity to ensure a high sensitivity. The electrodes disposed on and under the magnetoresistive effect film are pillar-shaped to concentrate the sense current such that the sense current can be concentrically supplied exclusively to the region with the high sensitivity.

摘要翻译： 在磁阻效应元件中，用于向垂直于磁阻效应膜的膜平面供给电流的电极中的至少一个比偏置施加膜之间的距离窄。 由于来自偏置施加膜的强偏压磁场，磁阻效应膜的敏感性在偏置施加膜附近的区域中较低。 然而，电极设置在具有高灵敏度的内部区域中，避免了具有较低灵敏度的那些区域，以确保高灵敏度。 设置在磁阻效应膜上和下方的电极是柱状的，以集中感测电流，使得感测电流可以同心地提供给具有高灵敏度的区域。

公开(公告)号：US06636390B2

公开(公告)日：2003-10-21

申请号：US09801698

申请日：2001-03-09

申请人： Tomomi Funayama ,  Masatoshi Yoshikawa ,  Takashi Koizumi ,  Akio Hori ,  Yuichi Osawa

发明人： Tomomi Funayama ,  Masatoshi Yoshikawa ,  Takashi Koizumi ,  Akio Hori ,  Yuichi Osawa

IPC分类号： G11B5187

CPC分类号： B82Y10/00 ,  G11B5/3903 ,  G11B5/3967

摘要： A magnetic head for vertical magnetic. The magnetic head includes: a recording head including a first main pole and a first return yoke, the first main pole having a first medium facing portion, the first return yoke having a second medium facing portion, and a reproducing head including a second main pole and a second return yoke, the second main pole having a third medium facing portion, the second return yoke having a fourth medium facing portion, first angle &thgr;1 between first and second straight lines being smaller than second angle &thgr;2 between the first straight line and third straight line, the first straight line connecting centers of medium facing surfaces the first medium facing portion and the second medium facing portion, the second straight line connecting opposing corners of medium facing surfaces of the first medium facing portion and the second medium facing portion, and the third straight line connecting centers of medium facing surfaces of the third medium facing portion and the fourth medium facing portion.

摘要翻译： 用于垂直磁性的磁头。 磁头包括：记录头，包括第一主极和第一返回轭，第一主极具有第一介质面对部分，第一返回轭具有第二介质面对部分，以及再现头，包括第二主极 和第二返回轭，所述第二主极具有第三介质面对部分，所述第二返回轭具有第四介质面对部分，第一和第二直线之间的第一角度θ1小于第一直线与第三直线之间的第二角度θ2 第一直线连接介质相对表面的第一介质面向部分和第二介质面向部分的中心，第二直线连接第一介质面向部分和第二介质面向部分的介质相对表面的相对角，以及 第三直线连接第三介质面向部分的介质相对表面的中心和面向p的第四介质 原因。

公开(公告)号：US06564445B1

公开(公告)日：2003-05-20

申请号：US09536743

申请日：2000-03-28

申请人： Susumu Hashimoto ,  Michiko Hara ,  Tomohiko Nagata ,  Kohichi Tateyama ,  Masatoshi Yoshikawa ,  Takeo Sakakubo ,  Hiroaki Yoda ,  Akio Hori ,  Takashi Koizumi

发明人： Susumu Hashimoto ,  Michiko Hara ,  Tomohiko Nagata ,  Kohichi Tateyama ,  Masatoshi Yoshikawa ,  Takeo Sakakubo ,  Hiroaki Yoda ,  Akio Hori ,  Takashi Koizumi

IPC分类号： G11B5127

CPC分类号： G11B5/313 ,  G11B5/3116 ,  G11B5/3163 ,  G11B5/3967 ,  Y10T29/49044

摘要： A method for manufacturing a magnetic head which includes a lower write pole having a projection, an upper write pole having a projection opposed to the projection of the lower write pole, and a magnetic gap interposed between the projection of the upper write pole and the projection of the upper write pole, comprising: a first step of making the magnetic gap on the projection of the lower write pole; a second step of making a non-magnetic material layer on the lower write pole, the non-magnetic material layer having a projection on its top surface in positional alignment with the projection of the lower write pole; a third step of making a mask layer on the non-magnetic material layer, the mask layer having an opening in which the top surface of the projection of the non-magnetic material layer is exposed; a fourth step of making a curved recess in the non-magnetic material layer by isotropically etching the non-magnetic material layer through the opening of the mask layer; a fifth step of making an approximately tapered recess down from the bottom of the curved recess by anisotropically etching the non-magnetic material layer through the opening of the mask layer; and a sixth step of making the upper write pole by burying a magnetic material in the tapered recess and the curved recess is provided.

公开(公告)号：US06362940B1

公开(公告)日：2002-03-26

申请号：US09520633

申请日：2000-03-07

申请人： Hiroaki Yoda ,  Atsuhito Sawabe ,  Hitoshi Iwasaki ,  Naoyuki Inoue ,  Akio Hori

发明人： Hiroaki Yoda ,  Atsuhito Sawabe ,  Hitoshi Iwasaki ,  Naoyuki Inoue ,  Akio Hori

IPC分类号： G11B539

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3116 ,  G11B5/3163 ,  G11B5/3929 ,  G11B5/3967 ,  G11B2005/3996

摘要： A recording-reproducing magnetic head comprising a magnetoresistance effect reproducing head and an inductive recording head. The magnetoresistance effect reproducing head having a magnetoresistance effect element and the inductive recording head having a lower magnetic core, an upper magnetic core, coils sandwiched between the lower and upper magnetic cores at their mid-parts, and a recording magnetic cores at leading end parts. The leading end parts of the lower and upper magnetic cores having a protruding part protruding to the recording magnetic gap layer and the upper magnetic core having a continuous magnetic body which extends from the protruding part to the mid-part. A center line of the protruding part of the lower magnetic core, which extends in a track length direction on a surface opposite a medium, intersecting the protruding part of the upper magnetic core.

摘要翻译： 一种记录再现磁头，包括磁阻效应再现头和感应记录头。 具有磁阻效应元件的磁电阻效应再现头和具有下磁芯，上磁芯，夹在下磁芯和上磁心之间的线圈的感应记录头及其前端部的记录磁芯 。 下磁芯和上磁芯的前端部具有突出部分，突出部分到记录磁隙层，上磁芯具有从突出部分延伸到中间部分的连续磁体。 下磁芯的突出部分的中心线，其在与介质相对的表面上的轨道长度方向上延伸，与上磁芯的突出部分相交。

公开(公告)号：US06304415B1

公开(公告)日：2001-10-16

申请号：US09615783

申请日：2000-07-13

申请人： Kohichi Tateyama ,  Hiroaki Yoda ,  Tadahiko Kobayashi ,  Hiromi Sakata ,  Michiko Hara ,  Akio Hori ,  Takashi Koizumi ,  Tomohiko Nagata

发明人： Kohichi Tateyama ,  Hiroaki Yoda ,  Tadahiko Kobayashi ,  Hiromi Sakata ,  Michiko Hara ,  Akio Hori ,  Takashi Koizumi ,  Tomohiko Nagata

IPC分类号： G11B531

CPC分类号： G11B5/3109 ,  G11B5/3116 ,  G11B5/3146 ,  G11B5/3153 ,  G11B5/3163 ,  G11B5/3967

摘要： At least one magnetic pole out of a pair of magnetic poles is provided with a T-shaped magnetic pole having a magnetic pole chip at the position contacting with a magnetic gap and an auxiliary magnetic pole which is wider than thereof. The proximity of an air bearing surface of the T-shaped magnetic pole is composed of a laminated film containing a magnetic material layer with a high saturated magnetic flux density which composes the magnetic pole chip and a portion of the auxiliary magnetic pole and a magnetic material layer with a low saturated magnetic flux density which composes the remaining portion of the auxiliary magnetic pole. When the front portion of the magnetic pole with the track width of 1.8 &mgr;m or less is composed of a laminated film containing a magnetic material layer having a high saturated magnetic flux density and a magnetic material layer having a low saturated magnetic flux density, the thickness of the magnetic material layer having the high saturated magnetic flux density is 0.5 &mgr;m or more. According to the above described magnetic pole, the magnetic saturation near the tip portion of the magnetic pole is controlled, so that preferable magnetic field strength and magnetic field gradient can be attained when the track width is narrowed.

摘要翻译： 在一对磁极中的至少一个磁极设置有在与磁隙接触的位置处具有磁极片的T形磁极和比其宽的辅助磁极。 T形磁极的空气轴承表面的接近度由包含构成磁极片和辅助磁极的一部分的磁性材料层和具有高饱和磁通密度的磁性材料层的叠层膜构成， 具有构成辅助磁极的剩余部分的低饱和磁通密度的层。 当磁道宽度为1.8μm或更小的磁极的前部由包含具有高饱和磁通密度的磁性材料层和具有低饱和磁通密度的磁性材料层的层叠膜构成时，厚度 具有高饱和磁通密度的磁性材料层的厚度为0.5μm以上。 根据上述磁极，控制磁极尖端部附近的磁饱和，从而当磁道宽度变窄时可以获得优选的磁场强度和磁场梯度。

公开(公告)号：US06198597B1

公开(公告)日：2001-03-06

申请号：US09153858

申请日：1998-09-16

申请人： Kohichi Tateyama ,  Hiroaki Yoda ,  Atsuhito Sawabe ,  Naoyuki Inoue ,  Akio Hori ,  Tadahiko Kobayashi ,  Hiromi Sakata ,  Michiko Hara ,  Takasi Koizumi ,  Tomohiko Nagata ,  Takeo Sakakubo ,  Kei Sakoda

发明人： Kohichi Tateyama ,  Hiroaki Yoda ,  Atsuhito Sawabe ,  Naoyuki Inoue ,  Akio Hori ,  Tadahiko Kobayashi ,  Hiromi Sakata ,  Michiko Hara ,  Takasi Koizumi ,  Tomohiko Nagata ,  Takeo Sakakubo ,  Kei Sakoda

IPC分类号： G11B531

CPC分类号： G11B5/3113 ,  G11B5/3116 ,  G11B5/3163

摘要： A thin-film magnetic head comprises a magnetic gap disposed to be positioned on an air bearing surface of the magnetic head, a pair of magnetic poles disposed to hold the magnetic gap therebetween, and a coil positioned between the pair of the magnetic poles to intersect the magnetic poles, wherein at least one of the magnetic poles being composed of a T-shaped magnetic pole, the T-shaped magnetic pole comprising a front part of a magnetic pole contacting with the magnetic gap, an intermediate part of a magnetic pole lying on the front part, and a rear part of a magnetic pole lying on the intermediate part, wherein a width of the front part roughly defines a track width, the rear part has a wider width in a direction of track width than a width of the front part, and the intermediate part contacts with the rear part at an entire width of the rear part at the air bearing surface and has a narrower width at a contacting face with the front part than the width of the rear part.

摘要翻译： 薄膜磁头包括设置在磁头的空气轴承表面上的磁隙，设置成保持磁隙的一对磁极和位于一对磁极之间的线圈，以相交 磁极，其中至少一个磁极由T形磁极组成，T形磁极包括与磁隙接触的磁极的前部，位于磁极的中间部分 在前部的前部和位于中间部的磁极的后部，前部的宽度大致限定轨道宽度，后部在轨道宽度方向上的宽度比宽度宽 前部，并且中间部分在后部的空气轴承表面的整个宽度处与后部接触，并且在与前部的接触面处具有比后部的宽度更窄的宽度。

公开(公告)号：US6056996A

公开(公告)日：2000-05-02

申请号：US358465

申请日：1999-07-22

申请人： Hiroaki Yoda ,  Atsuhito Sawabe ,  Hitoshi Iwasaki ,  Naoyuki Inoue ,  Akio Hori

发明人： Hiroaki Yoda ,  Atsuhito Sawabe ,  Hitoshi Iwasaki ,  Naoyuki Inoue ,  Akio Hori

IPC分类号： G11B5/31 ,  G11B5/39 ,  B05D5/12

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3929 ,  G11B5/3967 ,  G11B2005/3996 ,  G11B5/3116 ,  G11B5/3163

摘要： A magnetoresistance effect type head comprises a magnetoresistance effect film having a pair of leads connected thereto and possessing a magnetic field responding part and a pair of upper and lower shield layers having a magnetoresistance effect film nipped therebetween through the medium of a magnetic gap-forming insulating film. This magnetoresistance effect type head satisfies the relations, W.sub.s

摘要翻译： 磁阻效应型头包括具有连接到其上的一对引线并具有磁场响应部分的磁阻效应膜，以及一对具有磁阻效应膜的上下屏蔽层，其间通过磁隙形成绝缘体 电影。 该磁阻效应型磁头满足Ws