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71. 发明申请

US20090269618A1 MAGNETORESISTANCE EFFECT ELEMENT, MAGNETIC HEAD AND MAGNETIC RECORDING AND/OR REPRODUCING SYSTEM 有权
标题翻译：磁阻效应元件，磁头和磁记录和/或再现系统
公开(公告)号：US20090269618A1
公开(公告)日：2009-10-29
申请号：US12498202
申请日：2009-07-06
申请人： Yuuzo KAMIGUCHI , Hiromi Yuasa , Tomohiko Nagata , Hiroaki Yoda , Katsuhiko Koui , Masatoshi Yoshikawa , Hitoshi Iwasaki , Masashi Sahashi , Masayuki Takagishi
发明人： Yuuzo KAMIGUCHI , Hiromi Yuasa , Tomohiko Nagata , Hiroaki Yoda , Katsuhiko Koui , Masatoshi Yoshikawa , Hitoshi Iwasaki , Masashi Sahashi , Masayuki Takagishi
IPC分类号： G11B5/39
CPC分类号： H01L43/08 , B82Y10/00 , B82Y25/00 , G01R33/093 , G11B5/3133 , G11B5/3143 , G11B5/39 , G11B5/3903 , G11B5/3929 , G11B2005/3996 , H01F10/3259 , H01F10/3272 , Y10T428/1114
摘要： There is provided a practical magnetoresistance effect element which has an appropriate value of resistance, which can be sensitized and which has a small number of magnetic layers to be controlled, and a magnetic head and magnetic recording and/or reproducing system using the same. In a magnetoresistance effect element wherein a sense current is caused to flow in a direction perpendicular to the plane of the film, a resistance regulating layer is provided in at least one of a pinned layer, a free layer and an non-magnetic intermediate layer. The resistance regulating layer contains, as a principal component, an oxide, a nitride, a fluoride, a carbide or a boride. The resistance regulating layer may be a continuous film or may have pin holes. Thus, it is possible to provide a practical magnetoresistance effect element which has an appropriate value of resistance, which can be sensitized and which has a small number of magnetic layers, while effectively utilizing the scattering effect depending on spin.
摘要翻译：提供了一种具有适当的电阻值的实用磁阻效应元件，其可以被敏化并且具有少量的要控制的磁性层，以及使用该电阻的磁头和磁记录和/或再现系统。在使感应电流沿与膜的平面垂直的方向流动的磁阻效应元件中，电阻调节层设置在被钉扎层，自由层和非磁性中间层中的至少一个中。电阻调节层含有氧化物，氮化物，氟化物，碳化物或硼化物作为主要成分。电阻调节层可以是连续的膜或者可以具有针孔。因此，可以提供具有适当的电阻值的实用的磁阻效应元件，其可以被敏化并且具有少量的磁性层，同时有效地利用依赖于自旋的散射效应。

72. 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.

73. 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。

74. 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。

75. 发明授权

US07561383B2 Magnetoresistance effect element, magnetic head and magnetic recording and/or reproducing system 失效
公开(公告)号：US07561383B2
公开(公告)日：2009-07-14
申请号：US12212162
申请日：2008-09-17
申请人： Yuuzo Kamiguchi , Hiromi Yuasa , Tomohiko Nagata , Hiroaki Yoda , Katsuhiko Koui , Masatoshi Yoshikawa , Hitoshi Iwasaki , Masashi Sahashi , Masayuki Takagishi
发明人： Yuuzo Kamiguchi , Hiromi Yuasa , Tomohiko Nagata , Hiroaki Yoda , Katsuhiko Koui , Masatoshi Yoshikawa , Hitoshi Iwasaki , Masashi Sahashi , Masayuki Takagishi
IPC分类号： G11B5/127
CPC分类号： H01L43/08 , B82Y10/00 , B82Y25/00 , G01R33/093 , G11B5/3133 , G11B5/3143 , G11B5/39 , G11B5/3903 , G11B5/3929 , G11B2005/3996 , H01F10/3259 , H01F10/3272 , Y10T428/1114
摘要： There is provided a practical magnetoresistance effect element which has an appropriate value of resistance, which can be sensitized and which has a small number of magnetic layers to be controlled, and a magnetic head and magnetic recording and/or reproducing system using the same. In a magnetoresistance effect element wherein a sense current is caused to flow in a direction perpendicular to the plane of the film, a resistance regulating layer is provided in at least one of a pinned layer, a free layer and an non-magnetic intermediate layer. The resistance regulating layer contains, as a principal component, an oxide, a nitride, a fluoride, a carbide or a boride. The resistance regulating layer may be a continuous film or may have pin holes. Thus, it is possible to provide a practical magnetoresistance effect element which has an appropriate value of resistance, which can be sensitized and which has a small number of magnetic layers, while effectively utilizing the scattering effect depending on spin.

76. 发明申请

US20050157433A1 Magnetoresistance effect element, magnetic head and magnetic recording and/or reproducing system 有权
公开(公告)号：US20050157433A1
公开(公告)日：2005-07-21
申请号：US11080485
申请日：2005-03-16
申请人： Yuuzo Kamiguchi , Hiromi Yuasa , Tomohiko Nagata , Hiroaki Yoda , Katsuhiko Koui , Masatoshi Yoshikawa , Hitoshi Iwasaki , Masashi Sahashi , Masayuki Takagishi
发明人： Yuuzo Kamiguchi , Hiromi Yuasa , Tomohiko Nagata , Hiroaki Yoda , Katsuhiko Koui , Masatoshi Yoshikawa , Hitoshi Iwasaki , Masashi Sahashi , Masayuki Takagishi
IPC分类号： G11B5/31 , G11B5/39 , G11B5/33 , G11B5/127
CPC分类号： H01L43/08 , B82Y10/00 , B82Y25/00 , G01R33/093 , G11B5/3133 , G11B5/3143 , G11B5/39 , G11B5/3903 , G11B5/3929 , G11B2005/3996 , H01F10/3259 , H01F10/3272 , Y10T428/1114
摘要： There is provided a practical magnetoresistance effect element which has an appropriate value of resistance, which can be sensitized and which has a small number of magnetic layers to be controlled, and a magnetic head and magnetic recording and/or reproducing system using the same. In a magnetoresistance effect element wherein a sense current is caused to flow in a direction perpendicular to the plane of the film, a resistance regulating layer is provided in at least one of a pinned layer, a free layer and an non-magnetic intermediate layer. The resistance regulating layer contains, as a principal component, an oxide, a nitride, a fluoride, a carbide or a boride. The resistance regulating layer may be a continuous film or may have pin holes. Thus, it is possible to provide a practical magnetoresistance effect element which has an appropriate value of resistance, which can be sensitized and which has a small number of magnetic layers, while effectively utilizing the scattering effect depending on spin.

77. 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。

78. 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。

79. 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.

80. 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。

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