公开(公告)号：US5639547A

公开(公告)日：1997-06-17

申请号：US44486

申请日：1993-04-09

申请人： Katsuya Mitsuoka ,  Yutaka Sugita ,  Hideo Fujiwara

发明人： Katsuya Mitsuoka ,  Yutaka Sugita ,  Hideo Fujiwara

IPC分类号： G01R33/09 ,  G11B5/39 ,  G11B5/667 ,  G11B19/04 ,  H01F10/32 ,  G11B5/66 ,  B32B5/16

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G01R33/093 ,  G11B5/3903 ,  H01F10/324 ,  G11B19/04 ,  G11B2005/3996 ,  G11B5/3954 ,  H01F10/3286 ,  Y10S428/90 ,  Y10T428/1121 ,  Y10T428/26 ,  Y10T428/265

摘要： A magnetic lamination including at least a first magnetic film, a second magnetic film and, a third magnetic film, a first intervening intermediate film intervening between the first and second magnetic films, and a second intervening intermediate film intervening between the second and third magnetic films, wherein the respective magnetic films each comprise a magnetically soft film, the first and second intervening films differ in thickness, and one of the first and second intervening films can have a zero thickness and further, the intervening intermediate film can include a transition metal and a substance which is likely to form a heterogeneous mixture with the transition metal.

摘要翻译： 包括至少第一磁性膜，第二磁性膜和第三磁性膜，介于第一和第二磁性膜之间的第一中间介质膜和介于第二和第三磁性膜之间的第二介入中间膜的磁性层压 其中各个磁性膜各自包括磁性软膜，第一和第二介入膜的厚度不同，并且第一和第二介入膜中的一个可以具有零厚度，此外，介入中间膜可以包括过渡金属和 可能与过渡金属形成非均匀混合物的物质。

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

IPC分类号： G11B5/012 ,  G11B5/39 ,  G11B5/31 ,  G11B5/60

CPC分类号： G11B5/012 ,  G11B5/39

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。

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

IPC分类号： G11B5/31 ,  H01F10/32

CPC分类号： B82Y25/00 ,  G11B5/31 ,  H01F10/32

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。

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

IPC分类号： G11B5/09 ,  G11B5/465 ,  G11B19/04 ,  G11B15/12

CPC分类号： G11B5/09 ,  G11B19/04 ,  G11B5/465

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。

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

IPC分类号： G11B5/012 ,  G11B5/09 ,  G11B5/39 ,  G11B5/48 ,  H01F10/06

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。

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

IPC分类号： C22C19/07 ,  C25D3/56 ,  C25D7/00 ,  G11B5/31 ,  H01F10/16 ,  H01F41/26 ,  G11B5/147

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。

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

IPC分类号： G11B5/012 ,  G11B5/31 ,  G11B5/147

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。

公开(公告)号：US4592801A

公开(公告)日：1986-06-03

申请号：US639012

申请日：1984-08-09

申请人： Shinichi Hara ,  Shinji Narishige ,  Tsuneo Yoshinari ,  Mistuo Sato ,  Katsuya Mitsuoka ,  Makoto Morijiri ,  Masanobu Hanazono ,  Tetsuo Kobayashi

发明人： Shinichi Hara ,  Shinji Narishige ,  Tsuneo Yoshinari ,  Mistuo Sato ,  Katsuya Mitsuoka ,  Makoto Morijiri ,  Masanobu Hanazono ,  Tetsuo Kobayashi

IPC分类号： G11B5/31 ,  H01L21/302 ,  H01L21/3065 ,  H01L21/311 ,  B44C1/22 ,  C03C15/00 ,  C03C25/06 ,  C23F1/02

CPC分类号： H01L21/31116 ,  H01L21/302 ,  G11B5/3116 ,  G11B5/3163

摘要： A method of patterning a thin film by dry etching is disclosed in which, in order for a thin alumina film to have a predetermined pattern, the thin alumina film is selectively removed by carrying out the ion beam etching which uses a carbon fluoride gas, while using a photoresist film as a mask.

摘要翻译： 公开了一种通过干蚀刻图案化薄膜的方法，其中为了使氧化铝薄膜具有预定图案，通过进行使用氟化碳气体的离子束蚀刻来选择性地除去薄氧化铝膜，同时 使用光致抗蚀剂膜作为掩模。

公开(公告)号：US08064159B2

公开(公告)日：2011-11-22

申请号：US12642269

申请日：2009-12-18

申请人： Koji Sakamoto ,  Koichi Nishioka ,  Katsuya Mitsuoka ,  Katsumi Hoshino ,  Yo Sato

发明人： Koji Sakamoto ,  Koichi Nishioka ,  Katsuya Mitsuoka ,  Katsumi Hoshino ,  Yo Sato

IPC分类号： G11B5/127

CPC分类号： G01R33/098 ,  B82Y10/00 ,  B82Y25/00 ,  G11B5/3906 ,  G11B5/3929 ,  G11B2005/3996 ,  H01F10/16 ,  H01F10/1936 ,  H01F10/3272 ,  H01F10/3281 ,  H01F10/3295

摘要： One general embodiment of the present invention is a magnetic read head including a magnetoresistive sensor where sense current flows in a stacking direction of the magnetoresistive sensor, i.e., perpendicular to the plane of the layers of the head. The magnetoresistive sensor comprises a free layer having a magnetization direction that is affected by external magnetic fields and includes a Heusler alloy layer and a Co-based amorphous metal layer, a fixed layer which is stacked with the free layer and has a fixed magnetization direction, and a non-magnetic intermediate layer between the free layer and the fixed layer.

摘要翻译： 本发明的一个一般实施例是磁读取头，其包括磁阻传感器，其中感测电流在磁阻传感器的层叠方向上流动，即垂直于磁头层的平面。 磁阻传感器包括具有受外部磁场影响的磁化方向的自由层，并且包括Heusler合金层和Co基非晶态金属层，与自由层堆叠并具有固定的磁化方向的固定层， 以及在自由层和固定层之间的非磁性中间层。

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。