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：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。

公开(公告)号：US5471358A

公开(公告)日：1995-11-28

申请号：US851927

申请日：1992-03-16

申请人： Shigeru Tadokoro ,  Shinji Narishige ,  Hiroaki Koyanagi ,  Tetsuo Kobayashi

发明人： Shigeru Tadokoro ,  Shinji Narishige ,  Hiroaki Koyanagi ,  Tetsuo Kobayashi

IPC分类号： G11B5/31 ,  G11B5/39 ,  G11B5/147

CPC分类号： G11B5/3932 ,  G11B5/399 ,  G11B5/3113

摘要： In a magnetoresistive head, a domain suppressing layer is formed under each of opposite ends of a magnetoresistive film. The domain suppressing layer is composed of a first ferromagnetic film, an antiferromagnetic film and a second ferromagnetic film which are laminated one over another in this order. Since the spin distribution of the antiferromagnetic film is transmitted to the magnetoresistive film via the second ferromagnetic film, a stable longitudinal bias magnetic field can be achieved, irrespective of the degree of contamination of the surface of the ferromagnetic film.

摘要翻译： 在磁阻头中，在磁阻膜的相对端的每一端形成畴抑制层。 畴抑制层由依次叠层的第一铁磁性膜，反铁磁膜和第二铁磁性膜构成。 由于反铁磁膜的自旋分布经由第二铁磁膜传输到磁阻膜，所以可以实现稳定的纵向偏置磁场，而不管铁磁膜表面的污染程度如何。

公开(公告)号：US4943883A

公开(公告)日：1990-07-24

申请号：US266080

申请日：1988-11-02

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

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

IPC分类号： G11B5/31

CPC分类号： G11B5/3109

摘要： A thin film magnetic head provided with a first and a second thin film made of a magnetic material, disposed so as to form a closed magnetic circuit; and an intermediate film made of a non-magnetic material, disposed between the first and the second thin films so as to form a magnetic gap at a part of the magnetic circuit; wherein at least one of the first and the second thin films is made of a quaternary amorphous magnetic alloy, whose principal component is cobalt and which contains hafnium, tantalum and palladium.

摘要翻译： 一种薄膜磁头，其设置有由磁性材料制成的第一和第二薄膜，被设置成形成闭合磁路; 以及由非磁性材料制成的中间膜，设置在第一和第二薄膜之间，以在磁路的一部分形成磁隙; 其中所述第一和第二薄膜中的至少一个薄膜由主要成分为钴并含有铪，钽和钯的四元非晶磁性合金制成。

公开(公告)号：US4698273A

公开(公告)日：1987-10-06

申请号：US918333

申请日：1986-10-14

申请人： Matahiro Komuro ,  Yuzo Kozono ,  Takeshi Yasuda ,  Shinji Narishige ,  Masanobu Hanazono ,  Tetsuro Kuroda

发明人： Matahiro Komuro ,  Yuzo Kozono ,  Takeshi Yasuda ,  Shinji Narishige ,  Masanobu Hanazono ,  Tetsuro Kuroda

IPC分类号： H01F10/10 ,  B32B15/01 ,  C23C14/06 ,  F16L39/00 ,  G11B5/66 ,  H01F10/18 ,  H01F10/30 ,  H01F10/32 ,  H01F41/14 ,  H01F41/18 ,  C23C14/14

CPC分类号： B82Y25/00 ,  B32B15/01 ,  F16L39/00 ,  G11B5/66 ,  H01F10/18 ,  H01F10/32 ,  Y10S428/928 ,  Y10T428/12632 ,  Y10T428/12958

摘要： The film is composed of an alternate lamination of unit iron layers and unit layers of ferromagnetic iron compound such as Fe.sub.3 Al, Fe.sub.3 Si, Fe.sub.3 Ge and Fe.sub.3 Ga. The thickness of the both unit layers is less than 70 .ANG.. The film has a high saturation magnetization more than 230 emu/g and a high thermal stability so that the film is particularly applicable to a magnetic head core.

摘要翻译： 该膜由铁铁层和Fe3Al，Fe3Si，Fe3Ge和Fe3Ga等铁磁性铁化合物的单位层的交替叠层构成。 两个单元层的厚度小于70安培。 该膜具有高于230emu / g的高饱和磁化强度和高热稳定性，因此该膜特别适用于磁头芯。

公开(公告)号：US4623439A

公开(公告)日：1986-11-18

申请号：US658161

申请日：1984-10-05

申请人： Katsuya Mitsuoka ,  Shinji Narishige ,  Akira Kumagai ,  Masaaki Sano ,  Shinichi Hara ,  Masanobu Hanazono

发明人： Katsuya Mitsuoka ,  Shinji Narishige ,  Akira Kumagai ,  Masaaki Sano ,  Shinichi Hara ,  Masanobu Hanazono

IPC分类号： C22C19/00 ,  C23C14/14 ,  C23C14/24 ,  G11B5/31 ,  H01F10/16 ,  H01F41/14 ,  C23C14/00

CPC分类号： C23C14/24 ,  C23C14/14 ,  H01F41/14

摘要： A magnetic thin film of Ni-Co-Fe ternary alloy containing at most 75% by weight of Ni, 10 to 90% by weight of Co, and at most 15% by weight of Fe, which shows the magnetostriction constant between +2.times.10.sup.-6 to -2.times.10.sup.-6 and shows a uniaxial magnetic anisotropy of at most 10 Oe.The film is formed through the vacuum evaporation of the alloy during which two orthogonal external magnetic fields, directions x and y, are alternately applied over the deposition surface of a substrate.The film is suitable for a core material of a thin film magnetic head with a higher recording density.

摘要翻译： Ni-Co-Fe三元合金的磁性薄膜含有至多75重量％的Ni，10至90重量％的Co和至多15重量％的Fe，其显示出±2×10 -3摩尔的磁致伸缩常数， 6〜-2×10 -6，显示出至多10Oe的单轴磁各向异性。 通过合金的真空蒸发形成膜，在该过程中两个正交的外部磁场方向x和y交替施加在基板的沉积表面上。 该膜适用于具有较高记录密度的薄膜磁头的芯材。