公开(公告)号：US07221544B2

公开(公告)日：2007-05-22

申请号：US10206751

申请日：2002-07-26

申请人： Takayoshi Ohtsu ,  Shinji Narishige

发明人： Takayoshi Ohtsu ,  Shinji Narishige

IPC分类号： G11B5/66

CPC分类号： G11B5/00 ,  G11B5/03 ,  G11B5/1278 ,  G11B5/3967 ,  G11B2005/001 ,  G11B2005/0016

摘要： Formation of magnetic domains in a perpendicularly magnetized medium comprising an underlayer of a soft magnetic layer is prevented by appropriate magnetic domain control in the soft magnetic layer. One method controls magnetic domains of the soft magnetic layer by applying an external magnetic field to the medium. Another method provides a mechanism in the magnetic head for generating a magnetic field to control the magnetic domains of the soft magnetic layer of the medium.

摘要翻译： 通过在软磁性层中适当的磁畴控制来防止在包括软磁性层的底层的垂直磁化介质中形成磁畴。 一种方法是通过向介质施加外部磁场来控制软磁性层的磁畴。 另一种方法提供了磁头中用于产生磁场以控制介质的软磁性层的磁畴的机构。

公开(公告)号：US07157162B2

公开(公告)日：2007-01-02

申请号：US11036064

申请日：2005-01-18

申请人： Kazusuke Yamanaka ,  Tomoo Yamamoto ,  Yuzuru Hosoe ,  Nobuyuki Inaba ,  Yasutaro Uesaka ,  Masaaki Futamoto ,  Yoshibumi Matsuda ,  Kenji Furusawa ,  Shinji Narishige

发明人： Kazusuke Yamanaka ,  Tomoo Yamamoto ,  Yuzuru Hosoe ,  Nobuyuki Inaba ,  Yasutaro Uesaka ,  Masaaki Futamoto ,  Yoshibumi Matsuda ,  Kenji Furusawa ,  Shinji Narishige

IPC分类号： G11B5/65

CPC分类号： G11B5/64 ,  Y10T428/12465 ,  Y10T428/12986 ,  Y10T428/265 ,  Y10T428/31

摘要： A magnetic recording medium having a substrate, an under-layer formed on the substrate, a magnetic layer formed on the substrate and a protective layer formed on the magnetic layer. The magnetic layer comprises Co, Cr and Pt with a thickness being from 10 nm to 22 nm. Further, a coercivity of the magnetic layer is not less than 2000 Oe, and a fluctuation field of magnetic viscosity at a field strength equal to remanence coercivity or coercivity is not less than 30 Oe.

摘要翻译： 具有基板的磁记录介质，在基板上形成的下层，形成在基板上的磁性层和形成在磁性层上的保护层。 磁性层包括厚度为10nm至22nm的Co，Cr和Pt。 此外，磁性层的矫顽力不小于2000Oe，磁场强度等于剩磁矫顽力或矫顽磁力的磁场粘度的波动范围不小于30Oe。

公开(公告)号：US5296979A

公开(公告)日：1994-03-22

申请号：US963039

申请日：1992-10-19

申请人： Takashi Kawabe ,  Moriaki Fuyama ,  Shinji Narishige ,  Masatoshi Tsuchiya ,  Eiji Ashida ,  Makoto Morijiri ,  Hideki Yamazaki ,  Yutaka Sugita ,  Hiroshi Fukui ,  Tadayuki Iwakura ,  Makoto Aihara ,  Makoto Saito ,  Shunichiro Kuwatsuka ,  Hiroshi Ikeda ,  Yokuo Saitoh

发明人： Takashi Kawabe ,  Moriaki Fuyama ,  Shinji Narishige ,  Masatoshi Tsuchiya ,  Eiji Ashida ,  Makoto Morijiri ,  Hideki Yamazaki ,  Yutaka Sugita ,  Hiroshi Fukui ,  Tadayuki Iwakura ,  Makoto Aihara ,  Makoto Saito ,  Shunichiro Kuwatsuka ,  Hiroshi Ikeda ,  Yokuo Saitoh

IPC分类号： G11B5/012 ,  G11B5/31

CPC分类号： G11B5/012 ,  G11B5/3116

摘要： A magnetic disc apparatus includes a magnetic disc for recording information; a thin film magnetic head including a magnetic pole structure having an upper magnetic pole tip and a lower magnetic pole tip arranged to provide a magnetic gap at respective end portions thereof for writing and reading information in and from the magnetic disc; a device for rotating the magnetic disc; and a device for positioning the thin film magnetic head; the upper and lower magnetic pole tips having different contours at the respective end portions as viewed from a side confronting the magnetic disc wherein the difference (.DELTA.CW in .mu.m) in the width, along the magnetic gap, of the upper magnetic pole tip and the width, along the magnetic gap, of the lower magnetic pole tip satisfies the relation0

摘要翻译： 磁盘装置包括用于记录信息的磁盘; 包括具有上磁极端头和下磁极端头的磁极结构的薄膜磁头，其布置成在其各个端部处提供磁隙以在磁盘中写入和读取信息; 用于旋转磁盘的装置; 以及用于定位薄膜磁头的装置; 所述上磁极尖端和下磁极尖在相应端部处具有不同的轮廓，从与磁盘相对的一侧观察，其中沿着上部的磁隙的宽度（（delta）CW）（（m））） 磁极尖端和下磁极尖端的磁隙的宽度满足磁道密度Tr为每英寸1800或更多磁道的磁盘的关系0 <（Delta）CW <= 5000 / Tr。

公开(公告)号：US4939610A

公开(公告)日：1990-07-03

申请号：US252603

申请日：1988-10-03

申请人： Shinji Narishige ,  Masaaki Sano ,  Kouichi Nishioka ,  Takao Imagawa ,  Masanobu Hanazono ,  Tetsuo Kobayashi ,  Toshihiro Yoshida

发明人： Shinji Narishige ,  Masaaki Sano ,  Kouichi Nishioka ,  Takao Imagawa ,  Masanobu Hanazono ,  Tetsuo Kobayashi ,  Toshihiro Yoshida

IPC分类号： G11B5/31 ,  H01F41/18

CPC分类号： H01F41/18 ,  G11B5/31

摘要： A thin film magnetic head is disclosed which includes a substrate, a first magnetic core disposed on the substrate, a second magnetic core forming a magnetic path in conjunction with the first magnetic core, a conductor coil wound in the magnetic path and a gap formed between ends of the first magnetic core and the second magnetic core. At least one of the first magnetic core and the second magnetic core includes a thin film of a cobalt alloy. The cobalt alloy includes 20-70 atomic percent of cobalt, 20-60 atomic percent of nickel, 12-30 atomic percent of iron and 5-32 atomic percent of palladium.

摘要翻译： 公开了一种薄膜磁头，其包括基板，设置在基板上的第一磁芯，与第一磁芯一起形成磁路的第二磁芯，缠绕在磁路中的导体线圈和形成在磁路之间的间隙 第一磁芯和第二磁芯的端部。 第一磁芯和第二磁芯中的至少一个包括钴合金薄膜。 钴合金包括20-70原子％的钴，20-60原子％的镍，12-30原子％的铁和5-32原子百分比的钯。

公开(公告)号：US4791719A

公开(公告)日：1988-12-20

申请号：US1440

申请日：1987-01-08

申请人： Tetsuo Kobayashi ,  Yukihisa Tsukada ,  Shinji Narishige ,  Shinichi Hara

发明人： Tetsuo Kobayashi ,  Yukihisa Tsukada ,  Shinji Narishige ,  Shinichi Hara

IPC分类号： G11B5/31 ,  G11B5/127

CPC分类号： G11B5/3163 ,  Y10T29/49044 ,  Y10T29/49046 ,  Y10T29/49062

摘要： A first magnetic layer is formed upon a non-magnetic substrate, a gap layer is formed upon the first magnetic layer, a conductor coil covered with an insulation layer is formed upon the gap layer, a second magnetic layer is formed upon the gap layer and the insulation layer, a magnetic gap being formed between the first and second magnetic layers at a front portion facing a recording medium, and the second magnetic layer being connected to the first magnetic layer at a back portion. After forming a mask made of metal oxide upon the second magnetic layer, the second magnetic layer, the gap layer, and the first magnetic layer are formed into a predetermined shape respectively at the tip portion by dry etching. Thus, a high performance thin-film magnetic head having the same widths for the first and second magnetic layers is obtained.

摘要翻译： 在非磁性基板上形成第一磁性层，在第一磁性层上形成间隙层，在间隙层上形成被绝缘层覆盖的导体线圈，在间隙层上形成第二磁性层， 所述绝缘层在形成在所述第一和第二磁性层之间的面向记录介质的前部处形成磁隙，所述第二磁性层在后部连接到所述第一磁性层。 在第二磁性层上形成由金属氧化物制成的掩模之后，通过干蚀刻将第二磁性层，间隙层和第一磁性层分别形成为尖端部分的预定形状。 因此，获得了对于第一和第二磁性层具有相同宽度的高性能薄膜磁头。

公开(公告)号：US06846577B2

公开(公告)日：2005-01-25

申请号：US10386456

申请日：2003-03-13

申请人： Kazusuke Yamanaka ,  Tomoo Yamamoto ,  Yuzuru Hosoe ,  Nobuyuki Inaba ,  Yasutaro Uesaka ,  Masaaki Futamoto ,  Yoshibumi Matsuda ,  Kenji Furusawa ,  Shinji Narishige

发明人： Kazusuke Yamanaka ,  Tomoo Yamamoto ,  Yuzuru Hosoe ,  Nobuyuki Inaba ,  Yasutaro Uesaka ,  Masaaki Futamoto ,  Yoshibumi Matsuda ,  Kenji Furusawa ,  Shinji Narishige

IPC分类号： G11B5/66 ,  G11B5/02 ,  G11B5/64 ,  G11B5/65 ,  G11B5/73

CPC分类号： G11B5/64 ,  Y10T428/12465 ,  Y10T428/12986 ,  Y10T428/265 ,  Y10T428/31

摘要： An ferromagnetic thin film is used to provide a magnetic recording medium whose noise is low and whose S/N value is high. The ferromagnetic thin film as the magnetic film of the magnetic recording medium is such that the fluctuation field of magnetic viscosity at 25° C. at the field strength equal to remanence coercivity or coercivity is not less than 15 oersteds and the coercivity is not less than 2000 oersteds.

摘要翻译： 铁磁性薄膜用于提供噪声低且S / N值高的磁记录介质。 作为磁记录介质的磁性膜的铁磁性薄膜使得在等于剩磁矫顽力或矫顽力的场强下，25℃下磁力粘度的波动范围不小于15奥斯特，矫顽力不小于 2000奥斯特。

公开(公告)号：US5109311A

公开(公告)日：1992-04-28

申请号：US700095

申请日：1991-05-06

申请人： Masanobu Hanazono ,  Shinji Narishige ,  Yutaka Sugita ,  Hiroshi Fukui ,  Hirotsugu Fukuoka ,  Hajime Aoi ,  Masayuki Katsumoto ,  Takuji Ogawa ,  Jun Naruse ,  Yokuo Saitoh

发明人： Masanobu Hanazono ,  Shinji Narishige ,  Yutaka Sugita ,  Hiroshi Fukui ,  Hirotsugu Fukuoka ,  Hajime Aoi ,  Masayuki Katsumoto ,  Takuji Ogawa ,  Jun Naruse ,  Yokuo Saitoh

IPC分类号： C09D5/23 ,  C09D7/12 ,  G11B5/012 ,  G11B5/02 ,  G11B5/09 ,  G11B5/31 ,  G11B5/82

CPC分类号： G11B5/09 ,  G11B5/012 ,  G11B5/3116 ,  G11B5/82

摘要： This invention provides a magnetic disk device having a total memory capacity of 30 giga bytes or more, or more desirably 30.about.40 giga bytes. The magnetic disk used in this magnetic disk device has a plane record density of 45.about.80 mega bits per square inch. The thin film magnetic head has a pole thickness (P.sub.T), a magnetic flux density (B.sub.s), a magnetic gap depth (G.sub.d) and a record wavelenth (.lambda.) which satisfy the formulaG.sub.d .ltoreq.0.13 P.sub.T B.sub.s (.lambda.+4.3)-2.1.The magnetic disk rotation means rotate the magnetic disk at a speed of 24 m per second or more.

摘要翻译： 本发明提供了一种总存储容量为30千兆字节或更多，或更优选为30个差异40千兆字节的磁盘装置。 在该磁盘装置中使用的磁盘的平面记录密度为每平方英寸80万比特的平均记录密度。 薄膜磁头具有满足公式Gd

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：US4516180A

公开(公告)日：1985-05-07

申请号：US378176

申请日：1982-05-14

申请人： Shinji Narishige ,  Tsuneo Yoshinari ,  Mituo Sato ,  Masayuki Takagi ,  Toshihiro Yoshida

发明人： Shinji Narishige ,  Tsuneo Yoshinari ,  Mituo Sato ,  Masayuki Takagi ,  Toshihiro Yoshida

IPC分类号： G11B5/31 ,  G11B5/16

CPC分类号： G11B5/31

摘要： A thin film magnetic head comprises an upper magnetic film and a lower magnetic film which cooperate to constitute a magnetic circuit including a magnetic gap, and a coil conductor film constituting a coil having a predetermined number of turns and extending between the upper and the lower magnetic films to intersect the magnetic circuit. The upper magnetic film is composed of a laminate constituted by magnetic thin film layers and non-magnetic thin film layers stacked alternately with each other. An electrically insulating layer formed of a photo-sensitive resin is interposed between the upper magnetic film and the coil conductor film.

摘要翻译： 一种薄膜磁头，包括上部磁性膜和下部磁性膜，它们协调构成包括磁隙的磁路，以及构成具有预定匝数并在上部和下部磁性之间延伸的线圈的线圈导体膜 电影与磁路相交。 上磁性膜由由相互交替堆叠的磁性薄膜层和非磁性薄膜层构成的层叠体构成。 在上部磁性膜和线圈导体膜之间插入由光敏树脂形成的电绝缘层。

公开(公告)号：US06275360B1

公开(公告)日：2001-08-14

申请号：US09159752

申请日：1998-09-24

申请人： Kazuhiro Nakamoto ,  Takashi Kawabe ,  Tetsuo Kobayashi ,  Shun-ichi Marumi ,  Shinji Narishige ,  Takao Imagawa

发明人： Kazuhiro Nakamoto ,  Takashi Kawabe ,  Tetsuo Kobayashi ,  Shun-ichi Marumi ,  Shinji Narishige ,  Takao Imagawa

IPC分类号： G11B539

CPC分类号： G11B5/3967 ,  G11B5/11 ,  G11B5/3109 ,  G11B5/3912

摘要： A read-write head is capable of suppressing fluctuation on a reproduced waveform caused by repetition of a writing and reading operation, and is capable suppressing noise appearing in the reproduced waveform just after a writing operation is carried out. The read-write head has an upper magnetic core, an upper shield also serving as an lower magnetic core, a lower shield and a magnetoresistive film arranged between the upper shield and the lower shield. The upper shield has a soft magnetic film having a magnitude of anisotropy field of 5 to 30 Oe, or is a multilayer film composed of a high saturation magnetic flux density film and a negative magneto-striction film. The lower shield has a soft magnetic film having a magnitude of anisotropy field of 5 to 30 Oe.

摘要翻译： 读写头能够抑制由重复写入和读取操作引起的再现波形的波动，并且能够在刚刚执行写入操作之后抑制再现波形中出现的噪声。 读写头具有上磁芯，也可用作下磁芯的上屏蔽，下屏蔽和布置在上屏蔽和下屏蔽之间的磁阻膜。 上屏蔽具有各向异性磁场强度为5〜30Oe的软磁性膜，或者是由高饱和磁通密度膜和负磁致密膜构成的多层膜。 下屏蔽具有各向异性磁场强度为5〜30Oe的软磁性膜。