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11. 发明申请

US20070291421A1 CCP-CPP-GMR HEAD ASSEMBLY, MAGNETIC RECORDING/REPRODUCING APPARATUS, AND SPECIFICATION METHOD OF APPROPRIATE SENSE CURRENT DIRECTION OF CCP-CPP-GMR HEAD 失效
标题翻译： CCP-CPP-GMR头组件，磁记录/再现装置以及CCP-CPP-GMR头的适当感知电流方向的规格方法
公开(公告)号：US20070291421A1
公开(公告)日：2007-12-20
申请号：US11834855
申请日：2007-08-07
申请人： TOMOMI FUNAYAMA , KOHICHI TATEYAMA , MASAYUKI TAKAGISHI
发明人： TOMOMI FUNAYAMA , KOHICHI TATEYAMA , MASAYUKI TAKAGISHI
IPC分类号： G11B5/33
CPC分类号： G11B5/1272 , G11B5/33 , G11B5/39
摘要： Disclosed is a CCP-CPP-GMR head assembly which has: a CCP-CPP-GMR head that includes at least a current control layer having as a microstructure a plurality of truncated cone electric conductors with axes the same as a current direction and an insulator filling between the plurality of truncated cone electric conductors, and in which a surface on which a larger-area basal plane of the plurality of truncated cone electric conductors is greater in number is a first surface of the current control layer and a surface of an opposite side of the first surface is a second surface of the current control layer; and a sense current source providing the CCP-CPP-GMR head with a sense current that flows from the second surface to the first surface, a magnetic recording/reproducing apparatus having such a head, and a specification method of an appropriate sense current direction of the CCP-CPP-GMR head.
摘要翻译：公开了一种CCP-CPP-GMR头组件，其具有：CCP-CPP-GMR头，其至少包括具有作为微结构的电流控制层，多个具有与电流方向相同的轴的截头锥形电导体和绝缘体多个截锥形电导体之间的填充，其中多个截锥形电导体的较大面积的基面在其上较大的表面是电流控制层的第一表面和相反的表面第一表面的一侧是电流控制层的第二表面; 以及感测电流源，为CCP-CPP-GMR头提供从第二表面流向第一表面的感测电流，具有这种头的磁记录/再现装置，以及适当的感应电流方向的指定方法 CCP-CPP-GMR头。

12. 发明授权

US07196877B2 Magnetoresistive element, magnetoresistive head and magnetic reproducing apparatus 有权
标题翻译：磁阻元件，磁阻磁头和磁再现装置
公开(公告)号：US07196877B2
公开(公告)日：2007-03-27
申请号：US10743130
申请日：2003-12-23
申请人： Masatoshi Yoshikawa , Masayuki Takagishi , Tomomi Funayama , Kohichi Tateyama , Hitoshi Iwasaki , Hideaki Fukuzawa
发明人： Masatoshi Yoshikawa , Masayuki Takagishi , Tomomi Funayama , Kohichi Tateyama , Hitoshi Iwasaki , Hideaki Fukuzawa
IPC分类号： G11B5/33
CPC分类号： H01L43/08 , B82Y10/00 , B82Y25/00 , G11B5/00 , G11B5/313 , G11B5/3143 , G11B5/3903 , G11B2005/3996 , H01F10/30 , H01F10/3254 , H01F10/3268
摘要： A magnetoresistive element includes a magnetoresistive film having a magnetization pinned layer, a magnetization free layer, and a nonmagnetic intermediate layer. A magnetization direction of the magnetization pinned layer is substantially fixed in an external magnetic field, a magnetization direction of the magnetization free layer is configured to change in the external magnetic field, and the nonmagnetic intermediate layer formed between the magnetization pinned layer and the magnetization free layer and has a stacked structure of a first non-metallic intermediate layer/a metal intermediate layer/a second non-metallic intermediate layer. The magnetoresistive element also includes a pair of electrodes coupled to the magnetoresistive film and is configured to provide a current in a direction substantially perpendicular to a surface of the magnetoresistive film.
摘要翻译：磁阻元件包括具有磁化钉扎层，磁化自由层和非磁性中间层的磁阻膜。磁化被钉扎层的磁化方向基本上固定在外部磁场中，磁化自由层的磁化方向被配置为在外部磁场中改变，并且形成在磁化钉扎层和无磁化之间的非磁性中间层并且具有第一非金属中间层/金属中间层/第二非金属中间层的堆叠结构。磁阻元件还包括耦合到磁阻膜的一对电极，并且被配置为在基本垂直于磁阻膜的表面的方向上提供电流。

13. 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。

14. 发明授权

US07405906B2 Current-perpendicular-to-plane magnetoresistance effect device with double current control layers 失效
公开(公告)号：US07405906B2
公开(公告)日：2008-07-29
申请号：US10936715
申请日：2004-09-09
申请人： Tomomi Funayama , Masayuki Takagishi , Katsuhiko Koui , Kohichi Tateyama
发明人： Tomomi Funayama , Masayuki Takagishi , Katsuhiko Koui , Kohichi Tateyama
IPC分类号： G11B5/33
CPC分类号： B82Y25/00 , B82Y10/00 , G01R33/093 , G11B5/3906 , G11B5/398 , G11B5/3983 , G11B2005/3996 , H01F10/3259 , H01F10/3263 , H01L43/08
摘要： A magnetoresistance effect element of the dual spin valve type using a current-perpendicular-to-the-plane (CPP) system where a sensing current flows perpendicular to the stacked faces of a plurality of conductive layers, the magnetoresistance effect element comprises a first unit which includes a free layer and a first pinning layer, a second unit which includes the free layer shared with the first unit and a second pinning layer, a first current control layer which is provided in the first unit and limits the flow quantity of the sensing current, and a second current control layer which is provided in the second unit and limits the flow quantity of the sensing current.

15. 发明申请

US20060209472A1 Magnetoresistive device, magnetic reproducing head, and magnetic information reproducing apparatus 有权
公开(公告)号：US20060209472A1
公开(公告)日：2006-09-21
申请号：US11370185
申请日：2006-03-08
申请人： Katsuhiko Koui , Kohichi Tateyama , Tomomi Funayama , Koichi Kubo , Hitoshi Iwasaki , Hideaki Fukuzawa
发明人： Katsuhiko Koui , Kohichi Tateyama , Tomomi Funayama , Koichi Kubo , Hitoshi Iwasaki , Hideaki Fukuzawa
IPC分类号： G11B5/127 , G11B5/33
CPC分类号： G11B5/398 , B82Y10/00 , B82Y25/00 , G11B5/3929 , H01L43/08
摘要： A magnetoresistive device includes a magnetoresistive film and a pair of electrodes for applying a sense current substantially perpendicularly to the magnetoresistive film. The magnetoresistive film includes a magnetization pinned film including a first ferromagnetic layer having a magnetization direction substantially pinned in one direction, a magnetization free film including a second ferromagnetic layer whose magnetization direction changes in accordance with an external magnetic field applied thereto, an intermediate layer formed between the magnetization pinned film and the magnetization free film and having an insulating film and a metal conduction portion extending in the film thickness direction of the insulating film, and a layer containing an electrovalent or covalent compound formed near the metal conduction portion.

16. 发明授权

US06940700B2 Magnetic head and magnetic reproducing apparatus 失效
标题翻译：磁头和磁性再生装置
公开(公告)号：US06940700B2
公开(公告)日：2005-09-06
申请号：US10176577
申请日：2002-06-24
申请人： Kohichi Tateyama , Susumu Hashimoto , Masayuki Takagishi , Tomomi Funayama , Yuichi Ohsawa
发明人： Kohichi Tateyama , Susumu Hashimoto , Masayuki Takagishi , Tomomi Funayama , Yuichi Ohsawa
IPC分类号： G01R33/09 , G11B5/012 , G11B5/39 , H01F10/16 , H01F10/30 , H01F41/18 , H01L43/08 , G11B5/33
CPC分类号： G11B5/3925 , G11B5/012 , G11B5/3932
摘要： In a magnetic head having magnetic yoke layers, each magnetic yoke layer includes a yoke projecting portion (2A) projected toward a recording medium, and yoke setback portions (2B) set back from the yoke projecting portion. A first bias magnetic field applying film (5) of an antiferromagnetic material is formed to cover the yoke projecting portion whereas a second bias magnetic field applying film (6) of a ferromagnetic material may be formed on opposite side surfaces of the yoke projecting portion.
摘要翻译：在具有磁轭层的磁头中，每个磁轭层包括朝向记录介质突出的磁轭突出部分（2A），以及从磁轭突出部分回放的磁轭翻转部分（2B）。形成反铁磁材料的第一偏置磁场施加膜（5）以覆盖磁轭突出部分，而铁磁材料的第二偏置磁场施加膜（6）可以形成在磁轭突出部分的相对侧表面上。

17. 发明申请

US20050190510A1 CCP-CCP-GMR head assembly, magnetic recording/reproducing apparatus, and specification method of appropriate sense current direction of CCP-CPP-GMR head 有权
标题翻译： CCP-CCP-GMR头组件，磁记录/再现装置和CCP-CPP-GMR头适当感应电流方向的规范方法
公开(公告)号：US20050190510A1
公开(公告)日：2005-09-01
申请号：US10985886
申请日：2004-11-12
申请人： Tomomi Funayama , Kohichi Tateyama , Masayuki Takagishi
发明人： Tomomi Funayama , Kohichi Tateyama , Masayuki Takagishi
IPC分类号： G11B5/39 , G11B5/02 , G11B5/127 , G11B5/33
CPC分类号： G11B5/1272 , G11B5/33 , G11B5/39
摘要： Disclosed is a CCP-CPP-GMR head assembly which has: a CCP-CPP-GMR head that includes at least a current control layer having as a microstructure a plurality of truncated cone electric conductors with axes the same as a current direction and an insulator filling between the plurality of truncated cone electric conductors, and in which a surface on which a larger-area basal plane of the plurality of truncated cone electric conductors is greater in number is a first surface of the current control layer and a surface of an opposite side of the first surface is a second surface of the current control layer; and a sense current source providing the CCP-CPP-GMR head with a sense current that flows from the second surface to the first surface, a magnetic recording/reproducing apparatus having such a head, and a specification method of an appropriate sense current direction of the CCP-CPP-GMR head.
摘要翻译：公开了一种CCP-CPP-GMR头组件，其具有：CCP-CPP-GMR头，其至少包括具有作为微结构的电流控制层，多个具有与电流方向相同的轴的截头锥形电导体和绝缘体多个截锥形电导体之间的填充，其中多个截锥形电导体的较大面积的基面在其上较大的表面是电流控制层的第一表面和相反的表面第一表面的一侧是电流控制层的第二表面; 以及感测电流源，为CCP-CPP-GMR头提供从第二表面流向第一表面的感测电流，具有这种头的磁记录/再现装置，以及适当的感应电流方向的指定方法 CCP-CPP-GMR头。

18. 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。

19. 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.

20. 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。

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