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1.发明授权Large capacity magnetic disc apparatus with a particular relationship between pole thickness, saturated flux density, and recording wavelength 失效大容量磁盘装置，其磁极厚度，饱和磁通密度和记录波长之间具有特定关系
公开(公告)号：US5671107A
公开(公告)日：1997-09-23
申请号：US399221
申请日：1995-03-06
申请人： Katsuya Mitsuoka , Hiroshi Fukui , Makoto Aihara , Masanori Tanabe , Moriaki Fuyama , Shinji Narishige , Yutaka Sugita , Yoshihiro Shiroishi , Hajime Aoi , Yokuo Saitoh , Kanji Kawakami , Yoshikazu Tsuji , Masaaki Hayashi , Kazuo Nakagoshi
发明人： Katsuya Mitsuoka , Hiroshi Fukui , Makoto Aihara , Masanori Tanabe , Moriaki Fuyama , Shinji Narishige , Yutaka Sugita , Yoshihiro Shiroishi , Hajime Aoi , Yokuo Saitoh , Kanji Kawakami , Yoshikazu Tsuji , Masaaki Hayashi , Kazuo Nakagoshi
摘要： A magnetic disc apparatus has a large recording density of 120 megabits per square inch or more, and defines a relationship among a pole thickness (Pt) of thin-film magnetic heads disposed in the magnetic disc apparatus, and a saturation flux density (Bs) of cores of the heads and a recording wavelength (.lambda.) for the thin film magnetic discs have a coercivity of 1800 Oe or more, wherein a levitation space between the head and the disc is 0.15 .mu.m or less.
摘要翻译： 磁盘装置具有120兆比特每平方英寸或更大的记录密度，并且限定了设置在磁盘装置中的薄膜磁头的极厚度（Pt）与饱和磁通密度（Bs）之间的关系， 的磁头的磁芯和用于薄膜磁盘的记录波长（λ）具有1800Oe或更高的矫顽力，其中磁头和磁盘之间的悬浮空间为0.15μm或更小。
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公开(公告)号：US5051856A
公开(公告)日：1991-09-24
申请号：US420478
申请日：1989-10-12
申请人： Shinji Narishige , Katsuya Mitsuoka , Takao Imagawa , Kouichi Nishioka , Akira Kumagai , Masaaki Sano , Yutaka Sugita , Reiko Arai , Tetsuo Kobayashi , Toshihiro Yoshida , Yokuo Saitoh , Yoshikazu Tsuji , Masaaki Hayashi
发明人： Shinji Narishige , Katsuya Mitsuoka , Takao Imagawa , Kouichi Nishioka , Akira Kumagai , Masaaki Sano , Yutaka Sugita , Reiko Arai , Tetsuo Kobayashi , Toshihiro Yoshida , Yokuo Saitoh , Yoshikazu Tsuji , Masaaki Hayashi
摘要： A thin film magnetic head has magnetic films, at least one of which is composed of a material containing major components of nickel and iron and one or more element from nitrogen, oxygen and carbon and has two of face-centered cubic system and body-centered tetragonal system, whereby thin film magnetic heads having a high permeability and low coercive force can be provided.
摘要翻译： 薄膜磁头具有磁性膜，其中至少一个由含有镍和铁的主要成分的材料和来自氮，氧和碳的一种或多种元素组成，并且具有两个面心立方体系和以身体为中心 可以提供具有高磁导率和低矫顽力的薄膜磁头。
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3.发明授权
公开(公告)号：US5590008A
公开(公告)日：1996-12-31
申请号：US324380
申请日：1994-10-17
申请人： Masanori Tanabe , Hiroshi Fukui , Tadayuki Iwakura , Kazuhiro Nakamoto , Moriaki Fuyama , Katsuya Mitsuoka , Masaaki Sano , Makoto Saito , Makoto Aihara , Shuji Sudo
发明人： Masanori Tanabe , Hiroshi Fukui , Tadayuki Iwakura , Kazuhiro Nakamoto , Moriaki Fuyama , Katsuya Mitsuoka , Masaaki Sano , Makoto Saito , Makoto Aihara , Shuji Sudo
CPC分类号： G11B5/3153 , G11B5/012 , G11B5/3109 , G11B5/3113 , G11B5/3116
摘要： A magnetic disc unit has a thin film magnetic head in which a lower magnetic core and an upper magnetic core form a magnetic circuit. The upper magnetic core is constructed by magnetic films having at least two layers. A saturation magnetic flux density of the inside magnetic film, of the magnetic films having at least two layers, facing a magnetic gap of the magnetic circuit is larger than that of the outside magnetic films of the upper magnetic core and the lower magnetic core.
摘要翻译： 磁盘单元具有薄膜磁头，其中下磁芯和上磁芯形成磁路。 上磁芯由具有至少两层的磁性膜构成。 具有面对磁路的磁隙的至少两层的磁性膜的内部磁性膜的饱和磁通密度大于上部磁芯和下部磁芯的外部磁性膜的饱和磁通密度。
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4.发明授权Magnetic storage/read system with read head including magnetoresistive element 失效具有读磁头的磁存储/读取系统，包括磁阻元件
公开(公告)号：US5933297A
公开(公告)日：1999-08-03
申请号：US45189
申请日：1993-04-13
申请人： Hiroyuki Hoshiya , Katsuya Mitsuoka , Masaaki Sano , Reiko Arai , Susumu Soeya , Hiroshi Fukui , Moriaki Fuyama , Fumio Sato
发明人： Hiroyuki Hoshiya , Katsuya Mitsuoka , Masaaki Sano , Reiko Arai , Susumu Soeya , Hiroshi Fukui , Moriaki Fuyama , Fumio Sato
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/012 , G11B5/09 , G11B5/3903 , G11B5/3909 , G11B5/3919 , G11B5/3967 , G11B5/398 , G11B5/4886 , G11B2005/3996
摘要： A magnetic storage/read system includes a recording medium for magnetically storing a signal and a magnetoresistive element which is driven relative to the recording medium. The magnetoresistive element may include a substrate, a first antiferromagnetic film, a first ferromagnetic film, a first nonmagnetic film, a soft magnetic film, a second nonmagnetic film, a second ferromagnetic film, and a second antiferromagnetic film, wherein the films are sequentially layered directly on the substrate with no intervening layer between any of the films. At least one of the first antiferromagnetic film and the second antiferromagnetic film may be made of nickel oxide. The first ferromagnetic film and the second ferromagnetic film have a first magnetization which is fixed in a predetermined direction, and the soft magnetic film has a second magnetization which is rotatable in response to a magnetic field from the recording medium such that an angle between a direction of the second magnetization and the predetermined direction in which the first magnetization is fixed varies in response to the magnetic field from the recording medium, thereby producing a magnetoresistive effect.
摘要翻译： 磁存储/读取系统包括用于磁存储信号的记录介质和相对于记录介质驱动的磁阻元件。 磁阻元件可以包括基板，第一反铁磁膜，第一铁磁膜，第一非磁性膜，软磁膜，第二非磁性膜，第二铁磁膜和第二反铁磁膜，其中膜依次层叠 直接在衬底上，在任何膜之间没有中间层。 第一反铁磁膜和第二反铁磁膜中的至少一个可以由氧化镍制成。 第一铁磁膜和第二铁磁膜具有沿预定方向固定的第一磁化，并且软磁膜具有可响应于来自记录介质的磁场而旋转的第二磁化，使得在方向 第二磁化和第一磁化固定的预定方向响应于来自记录介质的磁场而变化，由此产生磁阻效应。
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公开(公告)号：US06249405B1
公开(公告)日：2001-06-19
申请号：US09588183
申请日：2000-06-07
申请人： Hiroyuki Hoshiya , Katsuya Mitsuoka , Masaaki Sano , Reiko Arai , Susumu Soeya , Hiroshi Fukui , Moriaki Fuyama , Fumio Sato
发明人： Hiroyuki Hoshiya , Katsuya Mitsuoka , Masaaki Sano , Reiko Arai , Susumu Soeya , Hiroshi Fukui , Moriaki Fuyama , Fumio Sato
IPC分类号： G11B539
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/012 , G11B5/09 , G11B5/3903 , G11B5/3909 , G11B5/3919 , G11B5/3967 , G11B5/398 , G11B5/4886 , G11B2005/3996
摘要： A magnetic storage/read system includes a recording medium having tracks, and a magnetic head, including a magnetoresistive element, which reads a magnetic field from the recording medium. The magnetic storage/read system satisfies a relationship of d≦(12.5×103)/Tr where d is a height, expressed in &mgr;m, of the magnetoresistive element in a direction perpendicular to a plane of the recording medium, and Tr is a track density, expressed in tracks per inch, of the tracks of the recording medium. The magnetoresistive element may include a first antiferromagnetic film; a first magnetic film having a magnetization direction which is fixed by magnetic coupling with the first antiferromagnetic film; a second antiferromagnetic film; a second magnetic film having a magnetization direction which is fixed by magnetic coupling with the second antiferromagnetic film; a third magnetic film having a magnetization direction which is able to rotate in response to an applied magnetic field; a first nonmagnetic conductive film disposed between the first magnetic film and the third magnetic film; and a second nonmagnetic conductive film disposed between the second magnetic film and the third magnetic film; wherein the third magnetic film is disposed between the first nonmagnetic conductive film and the second nonmagnetic conductive film, the first magnetic film is disposed between the first antiferromagnetic film and the first nonmagnetic conductive film, and the second magnetic film is disposed between the second antiferromagnetic film and the second nonmagnetic conductive film.
摘要翻译： 磁存储/读取系统包括具有轨道的记录介质和包括磁阻元件的磁头，其从记录介质读取磁场。 磁存储/读取系统满足d <=（12.5×103）/ Tr的关系，其中d是在垂直于记录介质的平面的方向上的磁阻元件以mum表示的高度，Tr是轨道 密度，以每英寸的轨道表示的记录介质的轨道。 磁阻元件可以包括第一反铁磁膜; 具有通过与第一反铁磁膜的磁耦合固定的磁化方向的第一磁性膜; 第二反铁磁膜; 具有通过与第二反铁磁膜的磁耦合固定的磁化方向的第二磁性膜; 具有能够响应于所施加的磁场而能够旋转的磁化方向的第三磁性膜; 设置在第一磁性膜和第三磁性膜之间的第一非磁性导电膜; 以及设置在所述第二磁性膜和所述第三磁性膜之间的第二非磁性导电膜; 其中所述第三磁性膜设置在所述第一非磁性导电膜和所述第二非磁性导电膜之间，所述第一磁性膜设置在所述第一反铁磁性膜与所述第一非磁性导电膜之间，所述第二磁性膜设置在所述第二反铁磁性膜 和第二非磁性导电膜。
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公开(公告)号：US6125019A
公开(公告)日：2000-09-26
申请号：US366595
申请日：1999-08-03
申请人： Hiroyuki Hoshiya , Katsuya Mitsuoka , Masaaki Sano , Reiko Arai , Susumu Soeya , Hiroshi Fukui , Moriaki Fuyama , Fumio Sato
发明人： Hiroyuki Hoshiya , Katsuya Mitsuoka , Masaaki Sano , Reiko Arai , Susumu Soeya , Hiroshi Fukui , Moriaki Fuyama , Fumio Sato
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/012 , G11B5/09 , G11B5/3903 , G11B5/3909 , G11B5/3919 , G11B5/3967 , G11B5/398 , G11B5/4886 , G11B2005/3996
摘要： A magnetic head includes a magnetoresistive element. The magnetoresistive element includes a first magnetic film having a fixed magnetization direction, a second magnetic film having a fixed magnetization direction, a third magnetic film having a rotatable magnetization direction, a first nonmagnetic film, and a second nonmagnetic film. The first magnetic film, the first nonmagnetic film, the third magnetic film, the second nonmagnetic film, and the second magnetic film are stacked in this order.
摘要翻译： 磁头包括磁阻元件。 磁阻元件包括具有固定磁化方向的第一磁性膜，具有固定磁化方向的第二磁性膜，具有可旋转磁化方向的第三磁性膜，第一非磁性膜和第二非磁性膜。 第一磁性膜，第一非磁性膜，第三磁性膜，第二非磁性膜和第二磁性膜按此顺序堆叠。
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公开(公告)号：US06633465B2
公开(公告)日：2003-10-14
申请号：US09840869
申请日：2001-04-25
申请人： Hiroyuki Hoshiya , Katsuya Mitsuoka , Masaaki Sano , Reiko Arai , Susumu Soeya , Hiroshi Fukui , Moriaki Fuyama , Fumio Sato
发明人： Hiroyuki Hoshiya , Katsuya Mitsuoka , Masaaki Sano , Reiko Arai , Susumu Soeya , Hiroshi Fukui , Moriaki Fuyama , Fumio Sato
IPC分类号： G11B539
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/012 , G11B5/09 , G11B5/3903 , G11B5/3909 , G11B5/3919 , G11B5/3967 , G11B5/398 , G11B5/4886 , G11B2005/3996
摘要： A magnetoresistive element includes a first antiferromagnetic film, a first magnetic film having a magnetization direction fixed by magnetic coupling with the first antiferromagnetic film, a second antiferromagnetic film, a second magnetic film having a magnetization direction fixed by magnetic coupling with the second antiferromagnetic film, a third magnetic film having a magnetization direction able to rotate in response to an applied magnetic field, a first nonmagnetic film disposed between the first magnetic film and the third magnetic film, and a second nonmagnetic film disposed between the second magnetic film and the third magnetic film. The third magnetic film is disposed between the first nonmagnetic film and the second nonmagnetic film, the first magnetic film is disposed between the first antiferromagnetic film and the first nonmagnetic film, and the second magnetic film is disposed between the second antiferromagnetic film and the second nonmagnetic film.
摘要翻译： 磁阻元件包括第一反铁磁膜，具有通过与第一反铁磁膜的磁耦合固定的磁化方向的第一磁性膜，第二反铁磁膜，具有通过与第二反铁磁性膜耦合而固定的磁化方向的第二磁性膜， 具有响应于施加的磁场而能够旋转的磁化方向的第三磁性膜，设置在第一磁性膜和第三磁性膜之间的第一非磁性膜和设置在第二磁性膜和第三磁性膜之间的第二非磁性膜 电影。 第三磁性膜设置在第一非磁性膜和第二非磁性膜之间，第一磁性膜设置在第一反铁磁膜和第一非磁性膜之间，第二磁性膜设置在第二反铁磁膜和第二非磁性膜之间 电影。
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8.发明授权
公开(公告)号：US5563752A
公开(公告)日：1996-10-08
申请号：US303111
申请日：1994-09-08
申请人： Matahiro Komuro , Hiroyuki Hoshiya , Katsuya Mitsuoka , Hiroshi Fukui , Hirotsugu Fukuoka , Moriaki Fuyama
发明人： Matahiro Komuro , Hiroyuki Hoshiya , Katsuya Mitsuoka , Hiroshi Fukui , Hirotsugu Fukuoka , Moriaki Fuyama
CPC分类号： B82Y25/00 , B82Y10/00 , G01R33/093 , G11B5/012 , G11B5/02 , G11B5/3903 , G11B5/3925 , G11B5/3967 , G11B5/399 , G11B5/455 , G11B2005/3996
摘要： A magnetic recording and reproducing device using a giant magnetoresistive film for providing high detection sensitivity. In the giant magnetoresistive film comprising a conductive nonmagnetic film, first and second conductive ferromagnetic films, a magnetization fixing film for fixing a magnetization direction of the first ferromagnetic film, and a pair of electrodes for making a detection current flow, when no external magnetic field is received and no detection current flows, a magnetization direction of the second ferromagnetic film is made non-orthogonal to the magnetization direction of the first ferromagnetic film. Magnitude of the detection current is determined so that when no external magnetic field is received and detection current flows, they are orthogonal to each other upon receipt of a magnetic field due to the detection current.
摘要翻译： 使用巨磁阻膜的磁记录和再现装置提供高检测灵敏度。 在包含导电非磁性膜，第一和第二导电铁磁膜的巨磁阻膜中，用于固定第一铁磁膜的磁化方向的磁化固定膜和用于形成检测电流的一对电极，当没有外部磁场 并且没有检测电流流动，第二铁磁性膜的磁化方向与第一铁磁性膜的磁化方向不正交。 确定检测电流的大小，使得当没有接收到外部磁场并且检测电流流动时，它们由于检测电流而在接收到磁场时彼此正交。
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公开(公告)号：US5307214A
公开(公告)日：1994-04-26
申请号：US848137
申请日：1992-03-09
申请人： Kanji Kawakami , Yoshiakira Karakama , Masayuki Takagi , Takayoshi Ohtsu , Hisayasu Honma , Tetsuo Kobayashi , Yutaka Sugita , Katsuya Mitsuoka
发明人： Kanji Kawakami , Yoshiakira Karakama , Masayuki Takagi , Takayoshi Ohtsu , Hisayasu Honma , Tetsuo Kobayashi , Yutaka Sugita , Katsuya Mitsuoka
摘要： A magnetic recording apparatus for recording information on a magnetic recording medium. A circuit for generates a recording current pulse train and supplies the pulse train to a magnetic head. The last pulse of the recording current pulse train dampled waveform. A ripple current is superposed on the damped waveform.
摘要翻译： 一种用于在磁记录介质上记录信息的磁记录装置。 一种用于产生记录电流脉冲串并将脉冲串提供给磁头的电路。 记录电流脉冲序列的最后脉冲波形波形。 纹波电流叠加在阻尼波形上。
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公开(公告)号：US4780781A
公开(公告)日：1988-10-25
申请号：US779469
申请日：1985-09-24
申请人： Masaaki Sano , Katsuya Mitsuoka , Makoto Morijiri , Shinji Narishige , Masanobu Hanazono , Toshihiro Yoshida
发明人： Masaaki Sano , Katsuya Mitsuoka , Makoto Morijiri , Shinji Narishige , Masanobu Hanazono , Toshihiro Yoshida
CPC分类号： G11B5/31
摘要： A thin film magnetic head comprising a lower magnetic film, an upper magnetic film which is formed over the lower magnetic film and in which one end is come into contact with one end of the lower magnetic film and the other end faces the other end of the lower magnetic film through a magnetic gap and thereby forming a magnetic circuit which has a magnetic gap in a part thereof, together with the lower magnetic film, and a conductor coil forming a coil of a predetermined number of turns and passing between the upper and lower magnetic films and crossing the magnetic circuit. Each of the upper and lower magnetic films is formed of a Co-Ni-Fe ternary alloy having a face-centered cubic crystal structure. Also, uniaxial anisotropy is alternately and perpendicularly given in every layer of a predetermined thickness stacked in the direction of thickness of the film.
摘要翻译： 一种薄膜磁头，包括下部磁性膜，上部磁性膜，形成在下部磁性膜的上方，并且一端与下部磁性膜的一端接触，另一端面向下部磁性膜的另一端 通过磁隙下降磁性膜，从而形成与下部磁性膜一起形成有磁性间隙的磁路，以及形成规定圈数的线圈的导体线圈，并且通过上下 磁性膜并穿过磁路。 上下磁性膜由具有面心立方晶体结构的Co-Ni-Fe三元合金形成。 另外，在膜的厚度方向堆叠的规定厚度的各层中交替地，垂直地赋予单轴各向异性。
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