公开(公告)号：US6064551A

公开(公告)日：2000-05-16

申请号：US30377

申请日：1998-02-25

申请人： Akio Takada ,  Takuji Shibata ,  Moriaki Abe ,  Tadayuki Honda ,  Kenji Yazawa ,  Hiroaki Narisawa

发明人： Akio Takada ,  Takuji Shibata ,  Moriaki Abe ,  Tadayuki Honda ,  Kenji Yazawa ,  Hiroaki Narisawa

IPC分类号： G11B5/39

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3903 ,  G11B5/3932 ,  G11B2005/3996

摘要： The present invention provides a high quality magnetoresistance effect type magnetic head having an increased reproduction output and capable of applying a uniform bias magnetic field to a magnetoresistance effect layer without increasing an impedance. The magnetoresistance effect type magnetic head according to the present invention includes: a magnetic layer 11 magnetized approximately in a vertical direction to a plane 14 opposing to a magnetic recording medium; a non-magnetic insulation layer 12 formed on the magnetic layer 11; and a magnetoresistance effect layer 13 formed on the non-magnetic insulation layer 12 and exhibiting the magnetoresistance effect. In the longitudinal type magnetoresistance effect type magnetic head according to the present, the detection current supplied to a magnetoresistance element is prevented from flowing into a hard magnetic film to lower the head reproduction output.

摘要翻译： 本发明提供了一种具有增加的再现输出并且能够在不增加阻抗的情况下将均匀偏置磁场施加到磁阻效应层的高质量磁阻效应型磁头。 根据本发明的磁阻效应型磁头包括：磁性层11，其磁性层大约在与磁记录介质相对的平面14的垂直方向上磁化; 形成在磁性层11上的非磁性绝缘层12; 以及形成在非磁性绝缘层12上并具有磁阻效应的磁阻效应层13。 在根据本发明的纵向型磁阻效应型磁头中，防止提供给磁阻元件的检测电流流入硬磁膜以降低磁头再现输出。

公开(公告)号：US5875079A

公开(公告)日：1999-02-23

申请号：US818040

申请日：1997-03-14

申请人： Tadayuki Honda ,  Takuji Shibata ,  Akio Takada

发明人： Tadayuki Honda ,  Takuji Shibata ,  Akio Takada

IPC分类号： G11B5/39

CPC分类号： G11B5/3932 ,  G11B5/3903 ,  G11B5/3941 ,  G11B5/398

摘要： A thin-film magnetic head in which magnetic stability of a magnetoresistance effect film is improved for further stabilizing the playback output. The thin-film magnetic head includes a magnetoresistance effect stabilizing layer 11 having a hard magnetic member 11d and a soft magnetic member 11e, a non-magnetic insulating layer 12 layered on the magnetoresistance effect stabilizing layer 11, a magnetoresistance effect layer 13 layered on the non-magnetic insulating layer 12 and a pair of electrodes connected on both ends of the magnetoresistance effect layer 13. Under the effect of the hard magnetic member 11d, the magnetoresistance effect layer 13 is reduced in coercivity and, under the effect of the soft magnetic member 11e, the magnetic filed which proves to be the saturation flex density is increased.

摘要翻译： 提高了磁阻效应膜的磁稳定性以进一步稳定重放输出的薄膜磁头。 薄膜磁头包括具有硬磁体11d和软磁体11e的磁阻效应稳定层11，层叠在磁阻效应稳定层11上的非磁性绝缘层12，层叠在磁阻效应层11上的磁阻效应层13 非磁性绝缘层12和连接在磁阻效应层13的两端的一对电极。在硬磁性体11d的作用下，磁电阻效应层13的矫顽力降低，在软磁性的作用下 成员11e，证明是饱和弯曲密度的磁场增加。

公开(公告)号：US5828527A

公开(公告)日：1998-10-27

申请号：US820343

申请日：1997-03-12

申请人： Akio Takada ,  Tadayuki Honda ,  Takuji Shibata ,  Moriaki Abe

发明人： Akio Takada ,  Tadayuki Honda ,  Takuji Shibata ,  Moriaki Abe

IPC分类号： G11B5/39

CPC分类号： G11B5/3932 ,  G11B5/3903 ,  G11B5/3935

摘要： A thin-film magnetic head improves magnetic stability of a magnetoresistance effect film 13 for further stabilizing the playback output. The thin-film magnetic head has a magnetoresistance effect stabilizing layer 11, a non-magnetic layer 12 and a magnetoresistance effect layer 13 exhibiting the magnetoresistance effect. The magnetoresistance effect stabilizing layer 11 has a hard magnetic film and a soft magnetic film. The magnetoresistance effect stabilizing layer 11 has a non-magnetic film 11c of a non-magnetic material in at least a partial area between a hard magnetic film 11b and a soft magnetic film 11d. In the thin-film magnetic head, there is produced a stable magnetostatic coupling action between the magnetoresistance effect stabilizing layer 11 and the magnetoresistance effect layer 13 for increasing the magnetic stability of the magnetoresistance effect layer 13 operating as a magnetically sensitive portion.

摘要翻译： 薄膜磁头提高了磁阻效应膜13的磁稳定性，以进一步稳定重放输出。 薄膜磁头具有表现出磁阻效应的磁阻效应稳定层11，非磁性层12和磁阻效应层13。 磁阻效应稳定层11具有硬磁性膜和软磁性膜。 磁阻效应稳定层11在硬磁膜11b和软磁膜11d之间的至少局部区域中具有非磁性材料的非磁性膜11c。 在薄膜磁头中，在磁阻效应稳定层11和磁阻效应层13之间产生稳定的静磁耦合作用，用于增加作为磁敏部分工作的磁阻效应层13的磁稳定性。

公开(公告)号：US5695657A

公开(公告)日：1997-12-09

申请号：US670937

申请日：1996-06-27

申请人： Takuji Shibata ,  Yoshihiro Kanno ,  Tadayuki Honda ,  Akio Takada ,  Yukio Kondo ,  Tadao Suzuki

发明人： Takuji Shibata ,  Yoshihiro Kanno ,  Tadayuki Honda ,  Akio Takada ,  Yukio Kondo ,  Tadao Suzuki

IPC分类号： G11B5/31 ,  G11B5/39 ,  B44C1/22

CPC分类号： G11B5/3903 ,  G11B5/3941 ,  G11B5/3945 ,  G11B5/3113 ,  Y10T29/49032

摘要： A magneto-resistance effect type thin-film magnetic head for detecting reproduced signals by the magneto-resistance effect, which is suitable for detecting reproduced signals by magneto-resistance effects, is disclosed. The thin-film magnetic head includes a two-layered magneto-resistance effect element made up of a first magneto-resistance effect film and a second magneto-resistance effect film of substantially the same width as the first magneto-resistance effect film, layered with a non-magnetic insulating film in-between. Since the magneto-static coupling is produced between the first and second MR films, the magnetic state between the first and second MR films is stabilized. The film thickness contributing to the playback output can be reduced as in the case of a single-layer magnetic head constituted by a single-layer MR film for realizing a high playback output.

摘要翻译： 公开了一种磁阻效应型薄膜磁头，用于通过磁阻效应检测再生信号，适用于通过磁阻效应检测再生信号。 薄膜磁头包括由第一磁阻效应膜和与第一磁阻效应膜基本上相同的宽度的第二磁阻效应膜构成的双层磁阻效应元件， 中间的非磁性绝缘膜。 由于在第一和第二MR膜之间产生磁静态耦合，所以第一和第二MR膜之间的磁状态是稳定的。 与由用于实现高回放输出的单层MR膜构成的单层磁头的情况相比，有助于重放输出的膜厚可以减小。

公开(公告)号：US6120920A

公开(公告)日：2000-09-19

申请号：US196562

申请日：1998-11-20

申请人： Akio Takada ,  Moriaki Abe ,  Tadayuki Honda ,  Hiroaki Narisawa ,  Takuji Shibata

发明人： Akio Takada ,  Moriaki Abe ,  Tadayuki Honda ,  Hiroaki Narisawa ,  Takuji Shibata

IPC分类号： G11B5/39 ,  B32B9/00

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3903 ,  G11B2005/3996 ,  Y10S428/90 ,  Y10T428/1121

摘要： A magneto-resistive effect type magnetic head employing a spin valve film in which the direction of magnetization of a free layer is constant even in the absence of an external magnetic field to assure magnetic stability. The magneto-resistive effect type magnetic head includes a magneto-resistive effect film of a planar substantially rectangular configuration, having its longitudinal direction substantially perpendicular to a magnetic recording medium sliding surface, a first electrode connected to a longitudinal end of the magneto-resistive effect film, a second electrode connected to the other longitudinal end of the magneto-resistive effect film and hard magnetic films arranged on both ends along the width of the magneto-resistive effect film. The magneto-resistive effect film is made up of at least a first ferromagnetic layer, a non-magnetic layer, a second ferromagnetic layer and an anti-ferromagnetic layer, layered together. The hard magnetic films has an electrical resistance larger than that of the magneto-resistive effect film.

摘要翻译： 使用自旋阀膜的磁阻效应型磁头，其中自由层的磁化方向即使在没有外部磁场的情况下也是恒定的，以确保磁稳定性。 磁阻效应型磁头包括平面大致矩形构造的磁阻效应膜，其纵向基本上垂直于磁记录介质滑动表面，第一电极连接到磁阻效应的纵向端 薄膜，连接到磁阻效应膜的另一纵向端的第二电极和沿着磁阻效应膜的宽度布置在两端的硬磁膜。 磁阻效应膜由至少第一铁磁层，非磁性层，第二铁磁层和反铁磁层构成，层叠在一起。 硬磁膜的电阻​​大于磁阻效应膜的电阻。

公开(公告)号：US5708542A

公开(公告)日：1998-01-13

申请号：US685611

申请日：1996-07-24

申请人： Akio Takada ,  Takuji Shibata ,  Tadayuki Honda

发明人： Akio Takada ,  Takuji Shibata ,  Tadayuki Honda

IPC分类号： G11B5/31 ,  G11B5/39

CPC分类号： G11B5/3903 ,  G11B5/3932 ,  G11B5/3941 ,  G11B5/3113

摘要： A magnetoresistance effect thin-film magnetic head superior in magnetic stability and capable of developing a high playback power. The thin-film magnetic head has a magnetoresistance effect stabilizing layer 11 inclusive a diamagnetic film or a hard magnetic film, a non-magnetic insulating layer 12 and a magnetoresistance effect layer 13 inclusive of a magnetoresistance effect film, layered together to form a magnetoresistance effect element 3. The thin-film magnetic head also has a non-magnetic insulating layer 4 arranged on a lateral surface of the magnetoresistance effect element 3 and a pair of electrodes connected to the magnetoresistance effect layer 13 on both ends of the upper surface of the magneto-resistance effect element 3. The playback signals are detected by the magnetoresistance effect of the magnetoresistance effect layer 13.

摘要翻译： 具有优异的磁稳定性和能够发展高回放功率的磁阻效应薄膜磁头。 薄膜磁头具有磁阻效应稳定层11，包括抗磁性膜或硬磁性膜，非磁性绝缘层12和包含磁阻效应膜的磁阻效应层13，层叠在一起以形成磁阻效应 薄膜磁头还具有布置在磁阻效应元件3的侧表面上的非磁性绝缘层4和连接到磁阻效应层13的上表面两端的磁阻效应层13的一对电极 磁阻效应元件3.再现信号由磁阻效应层13的磁阻效应检测。

公开(公告)号：US5875078A

公开(公告)日：1999-02-23

申请号：US694182

申请日：1996-08-08

申请人： Hideo Suyama ,  Takuji Shibata ,  Norio Saito ,  Mamoru Sasaki ,  Akio Takada ,  Jin Sato ,  Shuichi Haga

发明人： Hideo Suyama ,  Takuji Shibata ,  Norio Saito ,  Mamoru Sasaki ,  Akio Takada ,  Jin Sato ,  Shuichi Haga

IPC分类号： G11B5/31 ,  G11B5/39 ,  G11B5/455

CPC分类号： G11B5/3903 ,  G11B5/3906 ,  G11B5/455 ,  G11B5/3945

摘要： In a magnetoresistance thin film magnetic head, a bias conductor and a magnetoresistive magnetic sensing section are electrically connected to each other in series. Further, the bias conductor (7) is formed in such a pattern as to have a width and distance from a magnetic recording medium facing surface which become larger as it is away from a portion transversing the magnetoresistive magnetic sensing section.

摘要翻译： 在磁阻薄膜磁头中，偏置导体和磁阻磁感应部分串联电连接。 此外，偏置导体（7）形成为具有与磁记录介质相对表面的宽度和距离的图案，该距离随着远离磁阻感测部分的部分而变大。

公开(公告)号：US06883384B2

公开(公告)日：2005-04-26

申请号：US10366209

申请日：2003-02-13

申请人： Akio Takada ,  Minoru Ikarashi

发明人： Akio Takada ,  Minoru Ikarashi

IPC分类号： G01L1/04 ,  H03H9/02 ,  H03H9/46 ,  H04R11/04 ,  G01L1/00

CPC分类号： H03H9/462 ,  H03H9/02259 ,  H03H2009/02511 ,  H04R11/04

摘要： The present invention relates to a force sensing device, and in particular to a force sensing device for sensing an oscillating force or for application as a filter. In general terms, the invention proposes a force sensing device having a magneto electric material and a magnetic element moveable relative thereto in response to an applied force. The magneto electric material is exposed to the magnetic field of the magnetic element which has a magnetisation direction parallel to the direction of the movement.

摘要翻译： 力传感装置技术领域本发明涉及一种力感测装置，特别涉及用于感测振荡力或用作过滤器的力感测装置。 一般来说，本发明提出一种力传感装置，其具有响应于所施加的力可相对于其移动的磁电材料和磁性元件。 磁电材料暴露于磁性元件的磁场，其磁化方向平行于运动方向。

公开(公告)号：US06331924B1

公开(公告)日：2001-12-18

申请号：US09285094

申请日：1999-04-02

申请人： Akio Takada

发明人： Akio Takada

IPC分类号： G11B5127

CPC分类号： G11B5/3903 ,  G11B5/40

摘要： An MR head using an MR element as a magnetic detector and having head elements formed on a substrate is provided which comprises a capacitor connected in parallel to the MR element. The substrate is made of a conductive material to serve as one of electrodes forming the capacitor. Owing to this construction, the MR element of the MR head is hardly broken down due to an ESD or EOS.

摘要翻译： 提供了使用MR元件作为磁检测器并且具有形成在基板上的头元件的MR头，其包括与MR元件并联连接的电容器。 衬底由导电材料制成，用作形成电容器的电极之一。 由于这种结构，MR头的MR元件由于ESD或EOS而几乎不会分解。

公开(公告)号：US09989687B2

公开(公告)日：2018-06-05

申请号：US13699830

申请日：2010-05-25

申请人： Akio Takada ,  Takatoshi Yamada ,  Nobuyuki Koike ,  Masatoshi Sasaki ,  Kazuyuki Shibuya

发明人： Akio Takada ,  Takatoshi Yamada ,  Nobuyuki Koike ,  Masatoshi Sasaki ,  Kazuyuki Shibuya

IPC分类号： G02B5/30 ,  C23C16/40

CPC分类号： G02B5/3083 ,  C23C16/40 ,  G02B5/30 ,  G02B5/3025

摘要： A wave plate capable of increasing a birefringence quantity and being made into a thin film, and a method of manufacturing the wave plate. The wave plate includes a substrate, whereon convex portions and concave portions are formed with a period less than or equal to the wavelength of light that is used therewith, columnar portions, wherein fine grains of a dielectric material are layered by oblique vapor deposition of a dielectric material from two directions, in a columnar shape on the convex portions in the vertical direction relative to the surface of the substrate, and interstices that are located on the concave portions and disposed between the columnar portions. Using birefringence from the fine grains of the dielectric material and birefringence from the concave/convex portions of the substrate allows increasing the birefringence quantity and making a thin film.