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1. 发明授权

US06307708B1 Exchange coupling film having a plurality of local magnetic regions, magnetic sensor having the exchange coupling film, and magnetic head having the same 失效
标题翻译：具有多个局部磁性区域的交换耦合膜，具有交换耦合膜的磁性传感器和具有该交换耦合膜的磁头
公开(公告)号：US06307708B1
公开(公告)日：2001-10-23
申请号：US09268322
申请日：1999-03-16
申请人： Hiroaki Yoda , Masatoshi Yoshikawa , Yuichi Ohsawa , Tomomi Funayama
发明人： Hiroaki Yoda , Masatoshi Yoshikawa , Yuichi Ohsawa , Tomomi Funayama
IPC分类号： G11B5147
CPC分类号： B82Y25/00 , G01R33/093 , G11B5/127 , G11B5/3113 , G11B5/3156 , G11B5/3903 , G11B5/3925 , G11B5/3967 , G11B5/66 , H01F10/3218
摘要： An exchange coupling film, magnetic sensor having the exchange coupling film, and a magnetic head having the same. The exchange coupling film includes a ferromagnetic layer and an antiferromagnetic layer where a total a magnetic anisotropy is controlled to be dispersed by annealing or depositing the film in rotating magnetic fields. Small local magnetic regions of different uniaxial anisotropy are introduced in the exchange coupling film. The magnetic anisotropy dispersion of the exchange coupling film results in prohibiting large domain wall transfer of an irreversible change in magnetization direction and suppressing BHN.
摘要翻译：具有交换耦合膜的交换耦合膜，磁传感器和具有该交换耦合膜的磁头。交换耦合膜包括铁磁层和反铁磁层，其中通过在旋转磁场中退火或沉积膜来控制总磁各向异性以分散。在交换耦合膜中引入具有不同单轴各向异性的小局部磁性区域。交换耦合膜的磁各向异性分散导致阻止磁畴方向上不可逆变化的大的畴壁转移并抑制BHN。

2. 发明授权

US06606225B1 Yoke-type magnetic head and device having a granular structure in which a non-magnetic and electrical insulating material surrounds magnetic particles 失效
标题翻译：轭型磁头和具有非磁性和电绝缘材料围绕磁性颗粒的颗粒结构的装置
公开(公告)号：US06606225B1
公开(公告)日：2003-08-12
申请号：US09583575
申请日：2000-05-31
申请人： Tomomi Funayama , Yuichi Osawa , Masatoshi Yoshikawa , Hiroaki Yoda
发明人： Tomomi Funayama , Yuichi Osawa , Masatoshi Yoshikawa , Hiroaki Yoda
IPC分类号： G11B5127
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/1278 , G11B5/3183 , G11B5/3903 , G11B5/3925 , G11B2005/3996
摘要： The objective of this invention is to provide a yoke-type magnetic head and a magnetic recording device in which Barkhausen noise is low. It is possible to induce a magnetic flux efficiently within a magnetic head by using a granular magnetic film that exhibits both soft magnetic properties and a high resistance, which suppresses any shunt of the flow of the sense current into the magnetic yokes, thus preventing any deterioration insensitivity. Since this means that eddy currents can be suppressed, even during use in high-frequency regions, the frequency response characteristics are also improved. In addition, since the magnetic grains within the granular magnetic film are nano-sized, the dimensions of magnetic domains therein are also miniaturized to match that size, and thus there is also substantially no movement of the magnetic domain walls and this miniaturization also makes it possible to suppress the generation of Barkhausen noise. A similar effect can also be obtained by inducing maze domains within the magnetic yokes.
摘要翻译：本发明的目的是提供一种轭型磁头和一种其中巴克豪森噪声低的磁记录装置。通过使用表现出软磁性能和高电阻的粒状磁性膜，能够有效地在磁头内引起磁通，这抑制了磁轭中感应电流流动的任何分流，从而防止任何劣化不敏感。由于这意味着即使在高频区域使用时也能够抑制涡流，所以也提高了频率响应特性。此外，由于粒状磁性膜内的磁性粒子是纳米尺寸的，因此其中的磁畴的尺寸也小型化以与该尺寸相匹配，因此也基本上没有磁畴壁的移动，并且这种小型化也使得它可能抑制巴克豪森噪音的产生。通过诱导磁轭内的迷宫结构也可以获得类似的效果。

3. 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。

4. 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.

5. 发明授权

US06804089B2 Yoke-type magnetic head and magnetic recording/reproducing device 失效
标题翻译：轭式磁头和磁记录/再现装置
公开(公告)号：US06804089B2
公开(公告)日：2004-10-12
申请号：US10424844
申请日：2003-04-29
申请人： Tomomi Funayama , Yuichi Osawa , Masatoshi Yoshikawa , Hiroaki Yoda
发明人： Tomomi Funayama , Yuichi Osawa , Masatoshi Yoshikawa , Hiroaki Yoda
IPC分类号： G11B527
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/1278 , G11B5/3183 , G11B5/3903 , G11B5/3925 , G11B2005/3996
摘要： The objective of this invention is to provide a yoke-type magnetic head and a magnetic recording device in which Barkhausen noise is low. It is possible to induce a magnetic flux efficiently within a magnetic head by using a granular magnetic film that exhibits both soft magnetic properties and a high resistance, which suppresses any shunt of the flow of the sense current into the magnetic yokes, thus preventing any deterioration insensitivity. Since this means that eddy currents can be suppressed, even during use in high-frequency regions, the frequency response characteristics are also improved. In addition, since the magnetic grains within the granular magnetic film are nano-sized, the dimensions of magnetic domains therein are also miniaturized to match that size, and thus there is also substantially no movement of the magnetic domain walls and this miniaturization also makes it possible to suppress the generation of Barkhausen noise. A similar effect can also be obtained by inducing maze domains within the magnetic yokes.
摘要翻译：本发明的目的是提供一种轭型磁头和一种其中巴克豪森噪声低的磁记录装置。通过使用表现出软磁性能和高电阻的粒状磁性膜，能够有效地在磁头内引起磁通，这抑制了磁轭中感应电流流动的任何分流，从而防止任何劣化不敏感。由于这意味着即使在高频区域使用时也能够抑制涡流，所以也提高了频率响应特性。此外，由于粒状磁性膜内的磁性粒子是纳米尺寸的，因此其中的磁畴的尺寸也小型化以与该尺寸相匹配，因此也基本上没有磁畴壁的移动，并且这种小型化也使得它可能抑制巴克豪森噪音的产生。通过诱导磁轭内的迷宫结构也可以获得类似的效果。

6. 发明授权

US06741431B2 Magnetic head and magnetic recording/reproduction device 失效
标题翻译：轭型磁头和磁记录/再现装置
公开(公告)号：US06741431B2
公开(公告)日：2004-05-25
申请号：US10424822
申请日：2003-04-29
申请人： Tomomi Funayama , Yuichi Osawa , Masatoshi Yoshikawa , Hiroaki Yoda
发明人： Tomomi Funayama , Yuichi Osawa , Masatoshi Yoshikawa , Hiroaki Yoda
IPC分类号： G11B5127
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/1278 , G11B5/3183 , G11B5/3903 , G11B5/3925 , G11B2005/3996
摘要： The objective of this invention is to provide a yoke-type magnetic head and a magnetic recording device in which Barkhausen noise is low. It is possible to induce a magnetic flux efficiently within a magnetic head by using a granular magnetic film that exhibits both soft magnetic properties and a high resistance, which suppresses any shunt of the flow of the sense current into the magnetic yokes, thus preventing any deterioration insensitivity. Since this means that eddy currents can be suppressed, even during use in high-frequency regions, the frequency response characteristics are also improved. In addition, since the magnetic grains within the granular magnetic film are nano-sized, the dimensions of magnetic domains therein are also miniaturized to match that size, and thus there is also substantially no movement of the magnetic domain walls and this miniaturization also makes it possible to suppress the generation of Barkhausen noise. A similar effect can also be obtained by inducing maze domains within the magnetic yokes.
摘要翻译：本发明的目的是提供一种轭型磁头和一种其中巴克豪森噪声低的磁记录装置。通过使用表现出软磁性能和高电阻的粒状磁性膜，能够有效地在磁头内引起磁通，这抑制了磁轭中感应电流流动的任何分流，从而防止任何劣化不敏感。由于这意味着即使在高频区域使用时也能够抑制涡流，所以也提高了频率响应特性。此外，由于粒状磁性膜内的磁性粒子是纳米尺寸的，因此其中的磁畴的尺寸也小型化以匹配该尺寸，因此也基本上没有磁畴壁的移动，并且这种小型化也使得它可能抑制巴克豪森噪音的产生。通过诱导磁轭内的迷宫结构也可以获得类似的效果。

7. 发明授权

US06285531B1 Magnetic head with magneto-resistance effect element disposed on opposite side of magnetic core pair from recording coil 失效
标题翻译：具有磁阻效应元件的磁头设置在与记录线圈的磁芯对的相对侧上
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。

8. 发明授权

US06256171B1 Thin film magnetic head having an improved heat dispersion and magnetic recording apparatus using the same 失效
标题翻译：具有改进的热分散性的薄膜磁头和使用其的磁记录装置
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。

9. 发明授权

US06724582B2 Current perpendicular to plane type magnetoresistive device, magnetic head, and magnetic recording/reproducing apparatus 有权
标题翻译：电流垂直于平面型磁阻器件，磁头和磁记录/重放装置
公开(公告)号：US06724582B2
公开(公告)日：2004-04-20
申请号：US10050543
申请日：2002-01-18
申请人： Tomomi Funayama , Masayuki Takagishi , Masatoshi Yoshikawa , Kohichi Tateyama
发明人： Tomomi Funayama , Masayuki Takagishi , Masatoshi Yoshikawa , Kohichi Tateyama
IPC分类号： G11B539
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/3903 , G11B5/3909 , G11B5/3932 , G11B2005/3996 , H01L43/08
摘要： A current perpendicular to plane type magnetoresistive device has a magnetoresistive film, a pair of electrodes which allow a sense current to flow through the magnetoresistive film in a perpendicular direction to the plane thereof, and a biasing film which imparts a biasing magnetic field to the magnetoresistive film in a parallel direction to film plane. The direction of the magnetic field generated by the sense current flowing through the magnetoresistive film in the perpendicular direction to film plane is made substantially anti-parallel to the direction of the biasing magnetic field in a vicinity of a portion of the magnetoresistive film where a signal magnetic flux is introduced.
摘要翻译：垂直于平面型磁阻器件的电流具有磁阻膜，一对电极，其允许感测电流沿垂直于其平面的方向流过磁阻膜;以及偏置膜，其向磁阻施加偏置磁场胶片平行于胶片平面。由磁阻膜在垂直于膜平面的方向上流过的感测电流产生的磁场的方向与磁阻膜的一部分附近的偏置磁场的方向基本反平行，其中信号引入磁通量。

10. 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。

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