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：US06285531B1

公开(公告)日：2001-09-04

申请号：US09040353

申请日：1998-03-16

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

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

IPC分类号： G11B539

CPC分类号： G11B5/3967 ,  G11B5/2652 ,  G11B5/313 ,  G11B5/332 ,  G11B5/4886

摘要： A magnetic head has a recording magnetic yoke on the side of an air bearing surface of which a recording magnetic gap film is interposed and a reproducing magnetic yoke on the side of an air bearing surface of which a reproducing magnetic gap film is interposed. The magnetic yoke can serve concurrently for recording/reproducing. A recording coil supplying a recording magnetic flux to a recording medium through a recording magnetic yoke is disposed along one main surface of a magnetic yoke. An MR element in which a signal magnetic flux is led from a recording medium through a reproducing magnetic yoke is disposed along the other main surface on opposite side from a recording coil of a magnetic yoke. Or, at least on extension of a film plane of a magnetic gap film, a ferromagnetic layer is disposed so as for a film plane to exist in almost perpendicular direction relative to the film plane. According to such a head structure, reproducing sensitivity decrease of the reproducing MR head due to noise or occurrence of recording fringe can be suppressed.

摘要翻译： 磁头在记录磁隙膜的空气轴承表面一侧具有记录磁轭，并且在其中插入有再现磁隙膜的空气轴承表面侧的再现磁轭。 磁轭可以同时用于记录/再现。 通过记录磁轭向记录介质提供记录磁通的记录线圈沿磁轭的一个主表面设置。 通过再现磁轭将信号磁通从记录介质引出的MR元件沿与磁轭的记录线圈相反的另一个主表面设置。 或者，至少在磁隙膜的膜平面延伸的情况下，设置铁磁层，以使膜平面相对于膜平面以大致垂直的方向存在。 根据这种头部结构，可以抑制由于噪声或记录条纹的发生而导致的再现MR磁头的再现灵敏度降低。

公开(公告)号：US5912790A

公开(公告)日：1999-06-15

申请号：US818110

申请日：1997-03-13

申请人： Hiroaki Yoda ,  Akio Hori ,  Michiko Hara ,  Naoyuki Inoue ,  Yuichi Ohsawa ,  Susumu Hashimoto ,  Takeo Sakakubo ,  Norio Ozawa ,  Teruo Sasho

发明人： Hiroaki Yoda ,  Akio Hori ,  Michiko Hara ,  Naoyuki Inoue ,  Yuichi Ohsawa ,  Susumu Hashimoto ,  Takeo Sakakubo ,  Norio Ozawa ,  Teruo Sasho

IPC分类号： G11B5/31 ,  G11B5/39 ,  G11B5/127 ,  G11B5/187

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3103 ,  G11B5/3116 ,  G11B5/313 ,  G11B5/3163 ,  G11B5/3967 ,  G11B2005/3996

摘要： A composite magnetic head includes a recording head and a reproducing head. The recording head may be formed below or above the reproducing head. The lower of the recording and reproducing heads includes a first electrode. In addition, a conductive layer acting as a pole structure for the recording head includes a portion defining a hole through which a second electrode is made to contact the first electrode.

摘要翻译： 复合磁头包括记录头和再现头。 记录头可以形成在再现头的下方或上方。 记录和再现头的下部包括第一电极。 此外，作为记录头的极结构的导电层包括限定使第二电极与第一电极接触的孔的部分。

公开(公告)号：US06751846B2

公开(公告)日：2004-06-22

申请号：US10401869

申请日：2003-03-31

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 lower 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.

摘要翻译： 一种用于制造磁头的方法，该磁头包括具有突出部的下部写入极，具有与下部写入磁极的突起相对的突出部的上部写入磁极，以及插入在上部写入磁极和突起之间的磁隙 包括：使下部写入极的投影上的磁隙形成的第一步骤; 在下写入磁极上制作非磁性材料层的第二步骤，非磁性材料层在其顶表面上具有与下写入磁极的突起位置对准的突起; 在非磁性材料层上形成掩模层的第三步骤，所述掩模层具有露出所述非磁性材料层的突起的顶表面的开口; 通过所述掩模层的开口对所述非磁性材料层进行各向同性蚀刻来制造所述非磁性材料层中的弯曲凹部的第四工序; 第五步骤，通过通过掩模层的开口各向异性蚀刻非磁性材料层，从弯曲凹槽的底部向下形成大致锥形的凹陷; 并且提供通过将磁性材料埋入锥形凹部和弯曲凹部中来制造上部写入极的第六步骤。

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：US5872693A

公开(公告)日：1999-02-16

申请号：US826749

申请日：1997-03-24

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

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

IPC分类号： G11B5/31

CPC分类号： G11B5/3113 ,  G11B5/3116 ,  G11B5/313 ,  G11B5/3146 ,  G11B5/3153 ,  G11B5/3163

摘要： A thin-film magnetic head comprising a lower magnetic core formed on a substrate, an upper magnetic core formed on the lower magnetic core with a magnetic gap therebetween, and a coil interposed between the lower magnetic core and the upper magnetic core as insulated from the lower magnetic core and the upper magnetic core, characterized in that at least either of the lower magnetic core and the upper magnetic core comprises a front body of a magnetic pole facing a magnetic recording medium and a rear body of a magnetic pole having part thereof superposed on the front body of the magnetic pole, the rear body of the magnetic pole is disposed as recessed from the head surface facing the medium and held in contact with the front body of the magnetic pole in a plane, the plane is terminated at a rear of the end of the front body of the magnetic pole, and the rear body of the magnetic pole has a shape curved or bent in the direction opposite to the magnetic gap, and further the front body of the magnetic pole is composed of a magnetic member embedded in a trench formed in advance in an insulating layer.

摘要翻译： 一种薄膜磁头，包括形成在基板上的下磁芯，形成在下磁芯上的上磁芯，其间具有磁隙，以及插入在下磁芯和上磁心之间的线圈， 下磁芯和上磁芯，其特征在于，下磁芯和上磁芯中的至少一个包括面向磁记录介质的磁极的前体和磁极的后体，其部分叠加 在磁极的前体上，磁极的后体被设置为从面向介质的头表面凹陷并且在平面中与磁极的前体保持接触，平面终止在后面 的磁极的前体的端部，并且磁极的后体具有与磁隙相反的方向弯曲或弯曲的形状，并且还具有前体o f磁极由嵌入在预先形成在绝缘层中的沟槽中的磁性构件组成。

公开(公告)号：US6108167A

公开(公告)日：2000-08-22

申请号：US150926

申请日：1998-09-10

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： G11B5/31 ,  G11B5/39 ,  G11B5/187

CPC分类号： G11B5/3109 ,  G11B5/3146 ,  G11B5/3153 ,  G11B5/3116 ,  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 .mu.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 .mu.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。 当轨道宽度为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， 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：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：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：US5633771A

公开(公告)日：1997-05-27

申请号：US314508

申请日：1994-09-28

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 ,  G11B5/265 ,  G11B5/127 ,  G11B5/29 ,  G11B5/33

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 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并具有磁场响应部分的一对引线的磁阻效应膜和具有磁阻效应型头的一对上下屏蔽层满足关系Ws