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1. 发明申请

US20020048690A1 Magnetoresistance effect element, magnetic head, magnetic head assembly, magnetic storage system 审中-公开
公开(公告)号：US20020048690A1
公开(公告)日：2002-04-25
申请号：US09973053
申请日：2001-10-10
申请人： Kabushiki Kaisha Toshiba
发明人： Hideaki Fukuzawa , Yuzo Kamiguchi , Katsuhiko Koui , Shin-ichi Nakamura , Hitoshi Iwasaki , Kazuhiro Saito , Hiromi Fuke , Masatoshi Yoshikawa , Susumu Hashimoto , Masashi Sahashi
IPC分类号： G11B005/39
CPC分类号： H01F10/30 , B82Y10/00 , B82Y25/00 , G01R33/093 , G11B5/3906 , G11B5/3932 , G11B5/66 , G11B2005/3996 , H01F10/3272 , H01F10/3295 , H01F41/325 , Y10S428/90 , Y10T428/1107 , Y10T428/1121 , Y10T428/1143 , Y10T428/115 , Y10T428/1171 , Y10T428/1193 , Y10T428/12326 , Y10T428/12465 , Y10T428/12986 , Y10T428/265
摘要： Disclosed are a high-sensitivity and high-reliability magnetoresistance effect device (MR device) in which bias point designing is easy, and also a magnetic head, a magnetic head assembly and a magnetic recording/reproducing system incorporating the MR device. In the MR device incorporating a spin valve film, the magnetization direction of the free layer is at a certain angle to the magnetization direction of a second ferromagnetic layer therein when the applied magnetic field is zero. In this, the pinned magnetic layer comprises a pair of ferromagnetic films as antiferromagnetically coupled to each other via a coupling film existing therebetween. The device is provided with a means of keeping the magnetization direction of either one of the pair of ferromagnetic films constituting the pinned magnetic layer, and with a nonmagnetic high-conductivity layer as disposed adjacent to a first ferromagnetic layer on the side opposite to the side on which the first ferromagnetic layer is contacted with a nonmagnetic spacer layer. With that constitution, the device has extremely high sensitivity, and the bias point in the device is well controlled.

2. 发明申请

US20040160705A1 Yoke type reproducing magnetic head, method for fabricating same, and magnetic disk unit 审中-公开
标题翻译：轭式再现磁头，其制造方法和磁盘单元
公开(公告)号：US20040160705A1
公开(公告)日：2004-08-19
申请号：US10778124
申请日：2004-02-17
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Michiko Hara , Tomomi Funayama , Masatoshi Yoshikawa , Kohichi Tateyama , Hiroaki Yoda
IPC分类号： G11B005/127 , H04R031/00
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. 发明申请

US20030197982A1 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：US20030197982A1
公开(公告)日：2003-10-23
申请号：US10424822
申请日：2003-04-29
申请人： Kabushiki Kaisha Toshiba
发明人： Tomomi Funayama , Yuichi Osawa , Masatoshi Yoshikawa , Hiroaki Yoda
IPC分类号： G11B005/39
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。

4. 发明申请

US20020048128A1 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：US20020048128A1
公开(公告)日：2002-04-25
申请号：US09981987
申请日：2001-10-19
申请人： KABUSHIKI KAISHA TOSHIBA
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： G11B005/39
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。

5. 发明申请

US20040246634A1 Magnetoresistance effect element, magnetic head and magnetic reproducing apparatus 失效
公开(公告)号：US20040246634A1
公开(公告)日：2004-12-09
申请号：US10887080
申请日：2004-07-09
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Hiromi Yuasa , Yuzo Kamiguchi , Masatoshi Yoshikawa , Katsuhiko Koui , Hitoshi Iwasaki , Tomohiko Nagata , Takeo Sakakubo , Masashi Sahashi
IPC分类号： G11B005/127 , G11B005/33
CPC分类号： B82Y25/00 , B82Y10/00 , G01R33/093 , G11B5/00 , G11B5/3903 , G11B2005/3996 , H01F10/30 , H01F10/3227 , H01F10/3272 , H01F10/3295 , H01L43/08 , H01L43/10
摘要： In a spin valve type element, an interface insertion layer (32, 34) of a material exhibiting large spin-dependent interface scattering is inserted in a location of a magnetically pinned layer (16) or a magnetically free layer (20) closer to a nonmagnetic intermediate layer (18). A nonmagnetic back layer (36) may be additionally inserted as an interface not in contact with the nonmagnetic intermediate layer to increase the output by making use of spin-dependent interface scattering along the interface between the pinned layer and the nonmagnetic back layer or between the free layer and the nonmagnetic back layer.

6. 发明申请

US20030011463A1 Magnetoresistive effect element, magnetic head and magnetic reproducing apparatus 有权
标题翻译：磁阻效应元件，磁头和磁再生装置
公开(公告)号：US20030011463A1
公开(公告)日：2003-01-16
申请号：US10178023
申请日：2002-06-24
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Hitoshi Iwasaki , Katsuhiko Koui , Masatoshi Yoshikawa , Hiromi Yuasa , Hideaki Fukuzawa , Masashi Sahashi
IPC分类号： H01L043/00
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/012 , G11B5/3903 , G11B5/3909 , G11B2005/3996 , H01F10/3254 , H01L43/10
摘要： In a CPP element using a metal intermediate layer excellent in shot noise and response to high frequencies unlike a TMR element, its magnetoresistive effect film includes a magnetic layer mainly made of a half-metal exhibiting ferromagnetism, ferrimagnetism or antiferromagnetism, and largely variable in way of conduction in response to spin direction of electrons.
摘要翻译：在使用与TMR元件不同的散粒噪声和高频响应的金属中间层的CPP元件中，其磁阻效应膜包括主要由呈现铁磁性，亚铁磁性或反铁磁性的半金属形成的磁性层，并且在很大程度上可变的响应于电子自旋方向的传导。

7. 发明申请

US20030193757A1 Magnetic head and magnetic recording/reproduction device 失效
标题翻译：磁头和磁记录/再现装置
公开(公告)号：US20030193757A1
公开(公告)日：2003-10-16
申请号：US10424844
申请日：2003-04-29
申请人： Kabushiki Kaisha Toshiba
发明人： Tomomi Funayama , Yuichi Osawa , Masatoshi Yoshikawa , Hiroaki Yoda
IPC分类号： G11B005/39
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。

8. 发明申请

US20030188422A1 Magnetic head manufacturing method 失效
标题翻译：磁头制造方法
公开(公告)号：US20030188422A1
公开(公告)日：2003-10-09
申请号：US10401869
申请日：2003-03-31
申请人： KABUSHIKI KAISHA TOSHIBA
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： H04R031/00 , G11B005/127
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.
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工序; 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。

9. 发明申请

US20020191354A1 Magnetoresistance effect element, magnetic head and magnetic reproducing apparatus 有权
标题翻译：磁阻效应元件，磁头和磁再现装置
公开(公告)号：US20020191354A1
公开(公告)日：2002-12-19
申请号：US10108472
申请日：2002-03-29
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Masatoshi Yoshikawa , Masashi Sahashi , Katsuhiko Koi , Hitoshi Iwasaki , Hiromi Yuasa , Hideaki Fukuzawa
IPC分类号： G11B005/39
CPC分类号： H01L43/08 , B82Y10/00 , B82Y25/00 , G11B5/3143 , G11B5/3903 , G11B2005/3996 , H01F10/324 , H01F10/3254 , H01F41/325
摘要： A magnetoresistance effect film including a magnetically pinned layer, a non-magnetic intermediate layer and a magnetically free layer has sidewall layers covering at least side surfaces of the magnetically pinned layer and the non-magnetic intermediate layer. The sidewall layers are made of a high-resistance oxide, nitride, fluoride, boride, sulfide or carbide having a specular reflection effect against conduction electrons, thereby to prevent non-elastic scattering of electrons and missing of spin information on side surfaces of the magnetoresistance effect film.
摘要翻译：包括磁性钉扎层，非磁性中间层和无磁性层的磁阻效应膜具有覆盖磁性被钉扎层和非磁性中间层的至少侧面的侧壁层。侧壁层由具有对传导电子的镜面反射效应的高电阻氧化物，氮化物，氟化物，硼化物，硫化物或碳化物制成，从而防止电子的非弹性散射和在磁阻的侧表面上缺少自旋信息效果片。

10. 发明申请

US20020024777A1 Magnetic recording head, a magnetic reproducing head, a magnetic recording apparatus, and a magnetic reproducing apparatus 失效
标题翻译：磁记录头，磁再现头，磁记录装置和磁再现装置
公开(公告)号：US20020024777A1
公开(公告)日：2002-02-28
申请号：US09938611
申请日：2001-08-27
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Tomomi Funayama , Kohichi Tateyama , Michiko Hara , Masatoshi Yoshikawa , Hiroaki Yoda
IPC分类号： G11B005/39
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.
摘要翻译：描述了磁记录头，磁再现头，包括磁记录头的磁记录装置和包括磁再现头的磁再现装置。该磁性再现头在介质表面具有磁隙，并且包括一对铁磁材料的磁轭，磁阻效应膜和一对偏置膜。一对磁轭中的一个在面向介质的表面上具有磁性尖端，并且还具有从中间面向表面凹陷并且磁耦合到磁头的后部。磁头在中间面上具有沿轨道宽度方向的第一宽度，并且后部具有比第一宽度宽的轨道宽度方向上的第二宽度。磁阻效应膜从面向介质的表面凹陷并且磁耦合到铁磁材料的一对磁轭。一对偏压薄膜从面向中间的表面凹陷，并且一对偏置薄膜中的一个偏置薄膜包括邻近后部设置的硬磁材料层或与后部相接触设置的反铁磁材料层。磁头可以设置有适当体积的来自磁偏置膜的磁偏置，并且可以充分地控制磁头中的磁畴。

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