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1. 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.

2. 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。

3. 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。

4. 发明授权

US06564445B1 Magnetic head manufacturing method 有权
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.

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

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。

7. 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。

8. 发明授权

US06757143B2 Magnetoresistive effect element, its manufacturing method, magnetic head, magnetic reproducing apparatus, and magnetic memory 有权
标题翻译：磁阻效应元件，其制造方法，磁头，磁再现装置和磁存储器
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。

9. 发明授权

US5946167A Magnetoresistive sensor having lead and/or bias layer structure contributing to a narrow gap 失效
标题翻译：具有有助于窄间隙的引线和/或偏置层结构的磁阻传感器
公开(公告)号：US5946167A
公开(公告)日：1999-08-31
申请号：US816432
申请日：1997-03-14
申请人： Michiko Hara , Hiroaki Yoda , Yuichi Ohsawa
发明人： Michiko Hara , Hiroaki Yoda , Yuichi Ohsawa
IPC分类号： G11B5/31 , G11B5/39
CPC分类号： G11B5/3903 , G11B5/3967 , G11B5/3116 , G11B5/313
摘要： The present invention provides a magnetoresistive sensor comprising a magnetoresistive film (MR film) having a magnetic field response portion; a pair of leads on the MR film to supply sensing current to the MR film; and upper and lower (first and second) magnetic shield layers arranged so as to sandwich the MR film through a magnetic gap film, respectively. The pair of lead layers is deposited on the side of the magnetic field response portion, i.e., a portion of the MR film between the pair of the leads is the magnetic field response portion. The lead layer respectively provides multi-stage tapered portions, comprising a first tapered portion having a steep angle with respect to the MR film surface, and a second tapered portion having a shallow angle with respect to the MR film surface and provided continuously with the first tapered portion.
摘要翻译：本发明提供一种包括具有磁场响应部分的磁阻膜（MR膜）的磁阻传感器; 在MR膜上的一对引线，用于向MR膜提供感测电流; 以及分别通过磁隙膜夹住MR膜的上下（第一和第二）磁屏蔽层。一对引线层沉积在磁场响应部分的一侧，即一对引线之间的MR膜的一部分是磁场响应部分。引线层分别提供多级锥形部分，其包括相对于MR膜表面具有陡角的第一锥形部分和相对于MR膜表面具有浅角度的第二锥形部分，并连续地设置有第一锥形部分。

10. 发明授权

US5912790A Thin film magnetic recording-reproducing head having a high recording density and high fidelity 失效
标题翻译：具有高记录密度和高保真度的薄膜磁记录再现头
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。

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