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1. 发明授权

US5920447A Magnetic disk unit having laminated magnetic heads 失效
标题翻译：具有层叠磁头的磁盘单元
公开(公告)号：US5920447A
公开(公告)日：1999-07-06
申请号：US818674
申请日：1997-03-14
申请人： Hiromi Sakata , Hiroaki Yoda , Tomomi Funayama , Kohichi Tateyama , Tadahiko Kobayashi , Shigeru Takekado , Yoichiro Tanaka
发明人： Hiromi Sakata , Hiroaki Yoda , Tomomi Funayama , Kohichi Tateyama , Tadahiko Kobayashi , Shigeru Takekado , Yoichiro Tanaka
IPC分类号： G11B5/012 , G11B5/02 , G11B5/39 , G11B5/48 , G11B5/55 , G11B23/00 , G11B5/29
CPC分类号： G11B5/3967 , G11B5/012 , G11B5/4826 , G11B5/488 , G11B5/4886 , G11B5/5526 , G11B23/0007 , G11B5/02
摘要： A magnetic multi-head unit includes: a specific magnetic head formed so that a pair of magnetic yokes face each other on the same plane via a magnetic gap inclined by a predetermined azimuth angle; and a magnetic head which is adjacent to the specific magnetic head and which is formed so that a pair of magnetic yokes face each other on a plane different from the plane of the specific magnetic head via a magnetic gap inclined by the azimuth angle. The specific magnetic head and the adjacent magnetic head are laminated so as to form a plurality of layers while being shifted from each other in directions in which tracks on a magnetic disk extend. A magnetic disk unit includes: a magnetic disk, on which a plurality of information recording tracks are formed so as to extend in peripheral directions and which is rotated; and a magnetic multi-head including a plurality of transducers as heads for simultaneously writing and/or reading magnetic information on the plurality of information recording tracks of the magnetic disk every predetermined group of the tracks. The plurality of transducers are positioned as one with respect to the predetermined group of the tracks.
摘要翻译：磁性多头单元包括：特定磁头，其形成为使得一对磁轭经由倾斜预定方位角的磁隙在同一平面上彼此面对; 以及磁头，其与特定磁头相邻，并且形成为使得一对磁轭在与特定磁头的平面不同的平面上经由倾斜方位角的磁隙形成。特定的磁头和相邻的磁头被层叠以形成多个层，同时在磁盘上的磁道延伸的方向上彼此偏移。磁盘单元包括：磁盘，多个信息记录轨道形成为沿圆周方向延伸并旋转的磁盘; 以及包括多个换能器作为磁头的磁性多磁头，用于在每个预定磁道组中的每个磁盘的多个信息记录磁道上同时写入和/或读取磁信息。多个换能器相对于预定的轨道组定位成一个。

2. 发明授权

US06304415B1 Magnetic head 失效
标题翻译：磁头
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。

3. 发明授权

US06198597B1 Thin-film magnetic head having improved magnetic pole structure 有权
标题翻译：具有改善的磁极结构的薄膜磁头
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。

4. 发明授权

US06333840B1 Magnetic recording apparatus 失效
标题翻译：磁记录装置
公开(公告)号：US06333840B1
公开(公告)日：2001-12-25
申请号：US09270681
申请日：1999-03-16
申请人： Hiroaki Yoda , Tadahiko Kobayashi , Kohichi Tateyama , Hiromi Sakata
发明人： Hiroaki Yoda , Tadahiko Kobayashi , Kohichi Tateyama , Hiromi Sakata
IPC分类号： G11B5127
CPC分类号： B82Y10/00 , G11B5/012 , G11B5/09 , G11B5/3116 , G11B5/313 , G11B5/3903 , G11B5/3967 , G11B20/10
摘要： There is provided a magnetic recording apparatus capable of carrying out signal reproduction with high accuracy by using a narrow gap head structure corresponding to high recording density. An asymmetric gap structure MR head includes a magnetoresistance element 26 having a magnetoresistance film 24 and a pair of electrodes 25 disposed at the upper side; a reproducing magnetic gap film 23 disposed only at the lower side of the magnetoresistance element 26; a magnetic shielding film 22 disposed so as to make a laminate with the magnetoresistance element 26 through the reproducing magnetic gap film 23; and an insulating film 27 disposed at the upper side of the magnetoresistance element 26. When a signal is read by use of such a reproducing head, the signal of the present bit is read by subtracting a value obtained by multiplying signals of a plurality of previous bits by predetermined coefficients from the present reproduction signal. As another reproduction signal processing system, a partial response system is adopted.
摘要翻译：提供了一种能够通过使用对应于高记录密度的窄间隙头结构以高精度执行信号再现的磁记录装置。非对称间隙结构MR头包括具有磁阻膜24和设置在上侧的一对电极25的磁阻元件26。设置在磁阻元件26的下侧的再现磁隙膜23; 设置成通过再现磁隙膜23与磁阻元件26层叠的磁屏蔽膜22; 以及设置在磁阻元件26的上侧的绝缘膜27.当通过使用这种再现头读取信号时，通过减去通过将多个先前的信号乘以信号而获得的值来读取当前位的信号比特由来自当前再现信号的预定系数。作为另一再现信号处理系统，采用部分响应系统。

5. 发明授权

US6108167A Magnetic head 有权
标题翻译：磁头
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。

6. 发明授权

US07126795B2 Magnetic recording head, a magnetic reproducing head, a magnetic recording apparatus, and a magnetic reproducing apparatus 失效
公开(公告)号：US07126795B2
公开(公告)日：2006-10-24
申请号：US09938611
申请日：2001-08-27
申请人： Tomomi Funayama , Kohichi Tateyama , Michiko Hara , Masatoshi Yoshikawa , Hiroaki Yoda
发明人： Tomomi Funayama , Kohichi Tateyama , Michiko Hara , Masatoshi Yoshikawa , Hiroaki Yoda
IPC分类号： G11B5/127 , G11B5/33
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/3113 , G11B5/3146 , G11B5/3183 , G11B5/3919 , G11B5/3935 , G11B2005/3996
摘要： A magnetic recording head, a magnetic reproducing head, a magnetic recording apparatus comprising the magnetic recording head, and a magnetic reproducing apparatus comprising the magnetic reproducing head are described. The magnetic reproducing head having a magnetic gap at a medium-facing surface and includes a pair of magnetic yokes of ferromagnetic material, a magnetoresistance effect film, and a pair of biasing films. One of the pair of magnetic yokes has a magnetic tip at the medium-facing surface and also a rear portion recessed from the medium-facing surface and magnetically coupled to the magnetic tip. The magnetic tip has a first width in a track width direction at the medium-facing surface, and the rear portion has a second width in the track width direction wider than the first width. The magnetoresistance effect film is recessed from the medium-facing surface and is magnetically coupled to the pair of magnetic yokes of ferromagnetic material. The pair of biasing films are recessed from the medium-facing surface and one of the pair of biasing films comprises a hard magnetic material layer disposed adjacent to the rear portion or an antiferromagnetic material layer disposed in contact with the rear portion. The magnetic tip may be provided with appropriate volume of the magnetic biasing from the magnetic biasing film and magnetic domains in the magnetic tip may be sufficiently controlled.

7. 发明授权

US06850393B2 Magnetic head including a magneto resistive film connected to a yoke portion 有权
标题翻译：磁头包括连接到磁轭部分的磁阻膜
公开(公告)号：US06850393B2
公开(公告)日：2005-02-01
申请号：US09956127
申请日：2001-09-20
申请人： Michiko Hara , Tomomi Funayama , Masatoshi Yoshikawa , Kohichi Tateyama , Hiroaki Yoda
发明人： Michiko Hara , Tomomi Funayama , Masatoshi Yoshikawa , Kohichi Tateyama , Hiroaki Yoda
IPC分类号： G11B5/012 , G11B5/31 , G11B5/39
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/012 , G11B5/3116 , G11B5/3163 , G11B5/3916 , G11B2005/3996 , Y10T29/49043 , Y10T29/49046 , Y10T29/49128
摘要： In a yoke type reproducing magnetic head, a magnetoresistance effect film can be arranged in the vicinity of a medium facing surface, so that sensitivity is improved. The yoke type reproducing magnetic head comprises: a pair of magnetic yokes which face each other via a magnetic gap, at least one of the pair of magnetic yokes extending from a medium facing surface to a position retracted from the medium facing surface; a magnetoresistance effect film which has a curved portion protruding toward the medium facing surface in the magnetic gap and which is magnetically connected to the magnetic yokes; and an electrode which is electrically connected to the magnetoresistance effect film.
摘要翻译：在磁轭型重放磁头中，磁阻效应膜可以布置在面向介质的表面附近，从而提高灵敏度。磁轭式再现磁头包括：一对磁轭，其经由磁隙彼此相对，所述一对磁轭中的至少一个从介质相对表面延伸到从介质面向表面缩回的位置; 磁阻效应膜，其具有朝向磁隙中的与介质相对的表面突出并且与磁轭磁性连接的弯曲部分; 以及电连接到磁阻效应膜的电极。

8. 发明授权

US06912769B2 Method a fabricating a magnetic head 失效
标题翻译：制造磁头的方法a
公开(公告)号：US06912769B2
公开(公告)日：2005-07-05
申请号：US10389765
申请日：2003-03-18
申请人： Hiroaki Yoda , Kohichi Tateyama , Yusuke Ohinata
发明人： Hiroaki Yoda , Kohichi Tateyama , Yusuke Ohinata
IPC分类号： G11B5/31 , G11B5/00 , G11B5/012 , G11B5/127 , G11B21/21 , H04B31/00
CPC分类号： G11B5/1278 , G11B5/00 , G11B5/012 , G11B5/3106 , G11B2005/0029 , Y10T29/49032 , Y10T29/49043 , Y10T29/49044 , Y10T29/49046 , Y10T29/49048 , Y10T29/49815
摘要： A magnetic head is configured by forming a thin-film-shaped magnetic element on top of a thin film that is provided parallel to a medium-facing surface. An aperture is formed in the thin film, and part of a main magnetic pole is formed to have a tip portion that protrudes into that aperture. This configuration makes it possible to impose highly accurate control over the amount by which thin-film-shaped magnetic elements are recessed from the medium-facing surface, while simultaneously exerting accurate control over the amount of protrusion of the main magnetic pole tip portion by making the thickness of the thin film extremely small. As a result, the recording flux strength at the main magnetic pole tip portion can be increased to the ultimate value thereof, making it possible to supply a head that can record on a high retention force medium suitable for higher densities.
摘要翻译：通过在平行于中间面的表面设置的薄膜的顶部上形成薄膜状磁性元件来构成磁头。在薄膜中形成孔，并且主磁极的一部分形成为具有突出到该孔中的尖端部分。通过这样的构成，能够对从中间面向薄膜状的磁性体的凹陷量进行高度精确的控制，同时通过制造主磁极尖端部的突出量来进行精确的控制薄膜的厚度极小。结果，可以将主磁极尖端部分处的记录磁通强度增加到其最终值，使得可以提供可以记录在适合于更高密度的高保持力介质上的磁头。

9. 发明授权

US06751846B2 Magnetic head manufacturing method 失效
标题翻译：磁头制造方法
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。

10. 发明授权

US06172858B2 Thin film head 有权
标题翻译：薄膜头
公开(公告)号：US06172858B2
公开(公告)日：2001-01-09
申请号：US09479651
申请日：2000-01-07
申请人： Hiroaki Yoda , Yuichi Ohsawa , Kohichi Tateyama , Reiko Kondoh , Toshihiko Ohta , Junichi Akiyama , Hitoshi Iwasaki
发明人： Hiroaki Yoda , Yuichi Ohsawa , Kohichi Tateyama , Reiko Kondoh , Toshihiko Ohta , Junichi Akiyama , Hitoshi Iwasaki
IPC分类号： G11B5127
CPC分类号： B82Y10/00 , B82Y25/00 , G11B5/1278 , G11B5/3163 , G11B5/3903 , G11B5/3912 , G11B5/3919 , G11B5/3932 , G11B5/3967 , G11B5/399 , G11B2005/0016 , G11B2005/0018 , G11B2005/3996 , Y10T29/49025
摘要： The present invention provides a thin film head having a magnetoresistance effect element which includes at least two magnetic films, a nonmagnetic film sandwiched between the magnetic films, and leads connected to the magnetoresistance effect element wherein the width of one of the magnetic films, which essentially responds to a signal magnetic field, is not more than a distance between leads. The present invention provides a thin film head having a magnetoresistance effect element which includes at least two magnetic films and a nonmagnetic film sandwiched between the magnetic films, which makes use of a change in magnetic resistance caused by spin-dependent scattering, wherein at least a portion of one magnetic films, which essentially respond to a signal magnetic field extends in a direction same as that of the signal magnetic field.
摘要翻译：本发明提供了一种具有磁阻效应元件的薄膜头，该磁阻效应元件包括至少两个磁性膜，夹在磁性膜之间的非磁性膜和连接到磁阻效应元件的引线，其中一个磁性膜的宽度基本上响应信号磁场，不超过引线之间的距离。本发明提供了具有磁阻效应元件的薄膜头，该磁阻效应元件包括至少两个磁性膜和夹在磁性膜之间的非磁性膜，其利用由自旋依赖性散射引起的磁阻的变化，其中至少一个基本上响应于信号磁场的一个磁性膜的部分在与信号磁场的方向相同的方向上延伸。

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