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1. 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。

2. 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。

3. 发明申请

US20040027883A1 Magnetic head, method for producing same, and magnetic recording and/or reproducing system 有权
标题翻译：磁头，其制造方法以及磁记录和/或再现系统
公开(公告)号：US20040027883A1
公开(公告)日：2004-02-12
申请号：US10635508
申请日：2003-08-07
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Hiroaki Yoda , Yuichi Osawa , Tomomi Funayama
IPC分类号： G11C007/00
CPC分类号： G11B5/3925 , G11B5/00 , G11B5/127 , G11B5/1278 , G11B5/3116 , G11B2005/0002 , G11B2005/0021 , Y10T29/49039 , Y10T29/49043 , Y10T29/49044 , Y10T29/49046 , Y10T29/49055 , Y10T29/49067
摘要： There is provided a magnetic head capable of efficiently carrying out a recording or reproducing operation even in the case of a shorter magnetic path length and a shorter wavelength signal. The magnetic head comprises: a pair of magnetic bodies including respective first and second medium facing surfaces, respective first and second rear surfaces opposite to the medium facing surfaces, and respective inner side surfaces, the inner side surfaces facing each other; and a magnetic gap disposed between the inner side surfaces and including third medium facing surface coplanar with the first and the second medium facing surfaces and third rear surface coplanar with the first and second rear surfaces; one of the inner side surfaces satisfying relationships of xnullG1/2 with respect to 0nullynullTH, and 0.1nulltannull2(xnullG1/2)nullnullTHnullynull5nulltan(2(xnullG1/2))nullTH with respect to THnully where x represents X-coordinate of the one of the inner side surfaces and y represents Y-coordinate of the one of the inner side surfaces, the X-axis extends from a center of the third medium facing surface toward a center of the first or the second medium facing surface, the Y-axis extends from the center of the third medium facing surface toward the third rear surface, the Y-axis is substantially perpendicular to the X-axis, and G1 and TH respectively represent constants.
摘要翻译：即使在较短的磁路长度和较短的波长信号的情况下，也能够有效地执行记录或重放操作的磁头。磁头包括：一对磁体，包括相应的第一和第二介质面对表面，与介质相对表面相对的相应的第一和第二后表面，以及相应的内侧表面，内侧表面彼此相对; 以及设置在所述内侧表面之间并且包括与所述第一和第二介质相对表面共面的第三介质面对表面和与所述第一和第二后表面共面的第三后表面的磁隙; 一个内侧表面满足x = G1 / 2相对于0 <= y <= TH的关系，0.1tan {2（x-G1 / 2）} + TH <= y <= 5.tan 2（x-G1 / 2））+ TH相对于TH <= y，其中x表示内侧表面之一的X坐标，y表示内侧表面之一的Y坐标，所述Y轴从所述第三介质对向表面的中心朝向所述第一或第二介质面对表面的中心延伸，所述Y轴从所述第三介质相对表面的中心朝向所述第三后表面延伸，所述Y轴基本上垂直于X轴，G1和TH分别表示常数。

4. 发明申请

US20020039264A1 Yoke type magnetic head and magnetic disk unit 审中-公开
标题翻译：轭式磁头和磁盘单元
公开(公告)号：US20020039264A1
公开(公告)日：2002-04-04
申请号：US09942627
申请日：2001-08-31
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Yuichi Ohsawa , Masatoshi Yoshikawa , Michiko Hara , Tomomi Funayama , Susumu Hashimoto , Kohichi Tateyama , Hiroaki Yoda , Yuzo Kamiguchi
IPC分类号： G11B005/39
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/012 , G11B5/3183 , G11B5/3909 , G11B5/3916 , G11B5/3925 , G11B2005/3996
摘要： A yoke type magnetic head comprises a magnetoresistance effect film for sensing a signal magnetic field from a medium, a pair of magnetic yokes which are magnetically connected to the magnetoresistance effect film and which face each other via a magnetic gap, and a pair of electrodes which are connected to the magnetoresistance effect film so that a sense current in a thickness direction of the magnetoresistance effect film is applied thereto, one of the electrodes being formed in the magnetic gap. Thus, it is possible to prevent the lowering of the magnetic flux efficiency.
摘要翻译：轭型磁头包括用于感测来自介质的信号磁场的磁阻效应膜，与磁阻效应膜磁连接并且经由磁隙相互面对的一对磁轭，以及一对电极，连接到磁阻效应膜，使得在磁阻效应膜的厚度方向上的感测电流被施加到其上，其中一个电极形成在磁隙中。因此，可以防止磁通效率的降低。

5. 发明申请

US20020036873A1 Yoke type reproducing magnetic head, method for fabricating same, and magnetic disk unit 有权
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：US20020036873A1
公开(公告)日：2002-03-28
申请号：US09956127
申请日：2001-09-20
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Michiko Hara , Tomomi Funayama , Masatoshi Yoshikawa , Kohichi Tateyama , Hiroaki Yoda
IPC分类号： G11B005/39
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。

6. 发明申请

US20010022712A1 Magnetic head and magnetic recording and reproducing system 失效
标题翻译：磁头和磁记录和再现系统
公开(公告)号：US20010022712A1
公开(公告)日：2001-09-20
申请号：US09801698
申请日：2001-03-09
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Tomomi Funayama , Masatoshi Yoshikawa , Takashi Koizumi , Akio Hori , Yuichi Oshawa
IPC分类号： G11B005/39
CPC分类号： B82Y10/00 , G11B5/3903 , G11B5/3967
摘要： There are provided a magnetic head for vertical magnetic recording capable of suppressing noises due to a magnetically soft layer and improving the lowering of efficiency, and a magnetic recording and/or reproducing system using the same. The magnetic head includes: a recording head comprising a first main pole and a first return yoke, the first main pole having a first medium facing portion, the first return yoke having a second medium facing portion, the first and second medium facing portions are disposed with first magnetic gap therebetween, and a reproducing head comprising a second main pole and a second return yoke, the second main pole having a third medium facing portion, the second return yoke having a fourth medium facing portion, the third and fourth medium facing portions are disposed with second magnetic gap therebetween, first angle null1 between first and second straight lines being smaller than second angle null2 between the first straight line and third straight line, the first straight line connecting centers of medium facing surfaces the first medium facing portion and the second medium facing portion, the second straight line connecting opposing corners of medium facing surfaces of the first medium facing portion and the second medium facing portion, and the third straight line connecting centers of medium facing surfaces of the third medium facing portion and the fourth medium facing portion. With this construction, the direction of magnetic fluxes flowing through medium during a recording operation is not coincident with that during a reproducing operation, so that it is possible to prevent the generation of Barkhausen noises, which are generated when both directions are coincident with each other, and the lowering of reproducing efficiency.
摘要翻译：提供了一种用于垂直磁记录的磁头，其能够抑制由软磁层引起的噪声并提高效率的降低，以及使用该磁头的磁记录和/或再现系统。磁头包括：记录头，包括第一主极和第一返回轭，第一主极具有第一介质面对部分，第一返回轭具有第二介质面对部分，第一和第二介质面对部分设置其间具有第一磁隙，以及包括第二主极和第二返回轭的再现头，所述第二主极具有第三介质面对部分，所述第二回转轭具有第四介质面对部分，所述第三和第四介质面对部分与第一直线和第三直线之间的第二角度θ2比第一直线和第二直线之间的第二角度θ2小，第一直线将介质相对表面的第一介质面向部分的中心和第二直线第二中等面向部分，第二直线连接第一媒体的介质面对表面的相对角 m面对部分和第二介质面对部分，以及连接第三介质面向部分和第四介质面向部分的介质相对表面的中心的第三直线。利用这种结构，在记录操作期间流过介质的磁通量的方向与再现操作期间的磁通量的方向不一致，使得可以防止当两个方向彼此一致时产生的巴克豪森噪声，以及再现效率的降低。

7. 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。

8. 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。

9. 发明申请

US20030011940A1 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：US20030011940A1
公开(公告)日：2003-01-16
申请号：US10176577
申请日：2002-06-24
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Kohichi Tateyama , Susumu Hashimoto , Masayuki Takagishi , Tomomi Funayama , Yuichi Ohsawa
IPC分类号： G11B005/39
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。

10. 发明申请

US20020135948A1 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：US20020135948A1
公开(公告)日：2002-09-26
申请号：US10105342
申请日：2002-03-26
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Tomomi Funayama , Masayuki Takagishi , Kohichi Tateyama , Yuichi Ohsawa , Susumu Hashimoto , Michiko Hara , Akio Hori
IPC分类号： G11B005/39 , G11C011/15
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。

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