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    Magnetoresistive head with antiferromagnetic sublayers interposed between first and second spin-valve units to exchange bias inner magnetic films thereof
    1.
    发明授权
    Magnetoresistive head with antiferromagnetic sublayers interposed between first and second spin-valve units to exchange bias inner magnetic films thereof 失效
    具有反铁磁性子层的磁阻头插入在第一和第二自旋阀单元之间以交换其内部磁性膜

    公开(公告)号：US5576915A

    公开(公告)日：1996-11-19

    申请号：US472487

    申请日：1995-06-07

    申请人： Junichi Akiyama ,  Hiroaki Yoda ,  Yuichi Ohsawa ,  Hitoshi Iwasaki

    发明人： Junichi Akiyama ,  Hiroaki Yoda ,  Yuichi Ohsawa ,  Hitoshi Iwasaki

    IPC分类号： G11B5/39

    CPC分类号： G11B5/3903 ,  B82Y10/00 ,  B82Y25/00 ,  G11B5/3954 ,  G11B5/399 ,  G11B2005/3996

    摘要： A magnetoresistive head includes an antiferromagnetic portion interposed between first and second spin-valve units. Sense current supply directions through the first and second spin-valve units are perpendicular to a head facing surface of a magnetic recording medium. The first spin-valve unit is formed of a first inner magnetic film, a first outer magnetic film and a nonmagnetic film interposed between and in direct physical contact with the first inner magnetic film and the first outer magnetic film. The second spin-valve unit is formed of a second inner magnetic film, a second outer magnetic film and a nonmagnetic film interposed between and in direct physical contact with the second inner magnetic film and the second outer magnetic film. The antiferromagnetic portion is formed of a first antiferromagnetic sublayer and a second antiferromagnetic sublayer laminated on the first antiferromagnetic sublayer. The first antiferromagnetic sublayer is in contact with the first inner magnetic film to apply a first exchange bias magnetic field to the first inner magnetic film in a direction perpendicular to the head facing surface of the magnetic recording medium. The second antiferromagnetic sublayer is in contact with the second inner magnetic film to apply a second exchange bias magnetic field to the second inner magnetic film in a direction perpendicular to the surface of the magnetic recording medium. The second exchange bias magnetic field has a polarity opposite to that of the first exchange bias magnetic field.

    摘要翻译： 磁阻头包括介于第一和第二自旋阀单元之间的反铁磁部分。 通过第一和第二自旋阀单元的感测电流供给方向垂直于磁记录介质的朝向头部的表面。 第一自旋阀单元由第一内部磁性膜，第一外部磁性膜和介于第一内部磁性膜和第一外部磁性膜直接物理接触之间的非磁性膜形成。 第二自旋阀单元由第二内部磁性膜，第二外部磁性膜和介于第二内部磁性膜和第二外部磁性膜直接物理接触之间的非磁性膜形成。 反铁磁部分由层叠在第一反铁磁性子层上的第一反铁磁性子层和第二反铁磁性层构成。 第一反铁磁性子层与第一内部磁性膜接触，以在垂直于磁记录介质的朝向磁头的表面的方向上向第一内部磁性膜施加第一交换偏置磁场。 第二反铁磁子层与第二内磁性膜接触，以在垂直于磁记录介质的表面的方向上向第二内磁膜施加第二交换偏置磁场。 第二交换偏置磁场的极性与第一交换偏置磁场的极性相反。

    Magneto-resistive head
    2.
    发明授权
    Magneto-resistive head 失效
    磁阻头

    公开(公告)号：US5461527A

    公开(公告)日：1995-10-24

    申请号：US340448

    申请日：1994-11-14

    申请人： Junichi Akiyama ,  Yuichi Ohsawa ,  Hitoshi Iwasaki ,  Reiko Kondoh ,  Kohichi Tateyama ,  Toshihiko Ohta ,  Hiroaki Yoda

    发明人： Junichi Akiyama ,  Yuichi Ohsawa ,  Hitoshi Iwasaki ,  Reiko Kondoh ,  Kohichi Tateyama ,  Toshihiko Ohta ,  Hiroaki Yoda

    IPC分类号： G11B5/39

    CPC分类号： G11B5/3932 ,  G11B5/399

    摘要： A member having a first and a second magnetic layer are magnetostatically coupled and laminated and the first magnetic layer formed on a magneto-resistive element, for creating the exchange coupling on the magneto-resistive element and the first magnetic layer. The member is formed by sequentially laminating a first ferromagnetic layer magnetized in a sense along the direction of the longitudinal bias of the magneto-resistive element, non-magnetic layer and second ferromagnetic layer magnetized in a direction opposite to the magnetized direction of the first ferromagnetic layer, for example.

    摘要翻译： 具有第一和第二磁性层的构件被静磁耦合和层叠，并且第一磁性层形成在磁阻元件上，用于在磁阻元件和第一磁性层上产生交换耦合。 该构件通过沿着磁阻元件的方向磁化的第一铁磁层顺序地层叠，非磁性层和第二铁磁层沿与第一铁磁体的磁化方向相反的方向被磁化的方向 层，例如。

    Thin film head
    3.
    发明授权
    Thin film head 有权
    薄膜头

    公开(公告)号：US06172858B2

    公开(公告)日：2001-01-09

    申请号：US09479651

    申请日：2000-01-07

    申请人： Hiroaki Yoda ,  Yuichi Ohsawa ,  Kohichi Tateyama ,  Reiko Kondoh ,  Toshihiko Ohta ,  Junichi Akiyama ,  Hitoshi Iwasaki

    发明人： Hiroaki Yoda ,  Yuichi Ohsawa ,  Kohichi Tateyama ,  Reiko Kondoh ,  Toshihiko Ohta ,  Junichi Akiyama ,  Hitoshi Iwasaki

    IPC分类号： G11B5127

    CPC分类号： B82Y10/00 ,  B82Y25/00 ,  G11B5/1278 ,  G11B5/3163 ,  G11B5/3903 ,  G11B5/3912 ,  G11B5/3919 ,  G11B5/3932 ,  G11B5/3967 ,  G11B5/399 ,  G11B2005/0016 ,  G11B2005/0018 ,  G11B2005/3996 ,  Y10T29/49025

    摘要： The present invention provides a thin film head having a magnetoresistance effect element which includes at least two magnetic films, a nonmagnetic film sandwiched between the magnetic films, and leads connected to the magnetoresistance effect element wherein the width of one of the magnetic films, which essentially responds to a signal magnetic field, is not more than a distance between leads. The present invention provides a thin film head having a magnetoresistance effect element which includes at least two magnetic films and a nonmagnetic film sandwiched between the magnetic films, which makes use of a change in magnetic resistance caused by spin-dependent scattering, wherein at least a portion of one magnetic films, which essentially respond to a signal magnetic field extends in a direction same as that of the signal magnetic field.

    摘要翻译： 本发明提供了一种具有磁阻效应元件的薄膜头，该磁阻效应元件包括至少两个磁性膜，夹在磁性膜之间的非磁性膜和连接到磁阻效应元件的引线，其中一个磁性膜的宽度基本上 响应信号磁场，不超过引线之间的距离。 本发明提供了具有磁阻效应元件的薄膜头，该磁阻效应元件包括至少两个磁性膜和夹在磁性膜之间的非磁性膜，其利用由自旋依赖性散射引起的磁阻的变化，其中至少一个 基本上响应于信号磁场的一个磁性膜的部分在与信号磁场的方向相同的方向上延伸。

    Yoke type magnetoresistance head and manufacturing method of the same
    7.
    发明授权
    Yoke type magnetoresistance head and manufacturing method of the same 失效
    轭型磁阻头及其制造方法

    公开(公告)号：US06256863B1

    公开(公告)日：2001-07-10

    申请号：US08815179

    申请日：1997-03-11

    申请人： Kazuhiro Saito ,  Akiko Saito ,  Hitoshi Iwasaki ,  Akihiko Tsutai ,  Hiroaki Yoda ,  Tadahiko Kobayashi ,  Yuichi Ohsawa ,  Masahi Sahashi ,  Yuzo Kamiguchi

    发明人： Kazuhiro Saito ,  Akiko Saito ,  Hitoshi Iwasaki ,  Akihiko Tsutai ,  Hiroaki Yoda ,  Tadahiko Kobayashi ,  Yuichi Ohsawa ,  Masahi Sahashi ,  Yuzo Kamiguchi

    IPC分类号： G11B542

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3113 ,  G11B5/3163 ,  G11B5/3903 ,  G11B5/3916 ,  G11B2005/3996 ,  Y10T29/49034

    摘要： A magnetic yoke having a magnetic gap provided in the side of the surface facing the medium is disposed on the surface of a substrate. An MR film is disposed on the surface of the magnetic yoke substantially parallel to the substrate with a predetermined separation from the surface S facing the medium. At least both end portions of the MR film are magnetically coupled to the magnetic yoke. A pair of leads for supplying sensing current to the MR film have magnetic lead portions formed from the same magnetic layers as the magnetic yoke. The magnetic lead portions curb deterioration of MR head properties and yield reduction during formation of the leads. Furthermore, a bias magnetic field is applied to the magnetic yoke and the MR film at least during operation of the head. This bias magnetic field is for instance provided by a magnetic field induced by the electric current. Alternatively, a magnetic field induced by the electric current is applied while heat-processing the magnetic yoke. Magnetic anisotropy is induced to the magnetic yoke in a direction differing according to the position. This magnetic anisotropy curbs Barkhausen noise caused by the magnetic yoke.

    摘要翻译： 在基板的表面上设置具有设置在面向介质的表面侧的磁隙的磁轭。 以与面向介质的表面S预定间隔的方式将磁性薄膜基本上平行于基板平行设置在磁轭的表面上。 MR膜的至少两个端部磁耦合到磁轭。 用于向MR膜提供感测电流的一对引线具有由与磁轭相同的磁性层形成的磁性引线部分。 磁性引线部分在引线形成期间抑制MR磁头特性的劣化和屈服减少。 此外，至少在头部的操作期间，向磁轭和MR膜施加偏置磁场。 该偏置磁场例如由电流引起的磁场提供。 或者，在对磁轭进行加热处理的同时施加由电流引起的磁场。 磁性各向异性在根据位置不同的方向上被引到磁轭上。 这种磁各向异性限制了由磁轭引起的Barkhausen噪声。

    Yoke-type head with magneto-resistance effect film recessed from medium facing surface and extending across magnetic gap
    8.
    发明授权
    Yoke-type head with magneto-resistance effect film recessed from medium facing surface and extending across magnetic gap 失效
    具有磁阻效应膜的轭型磁头，从介质面向表面凹陷并延伸穿过磁隙

    公开(公告)号：US06369992B1

    公开(公告)日：2002-04-09

    申请号：US08909687

    申请日：1997-08-12

    申请人： Hiroaki Yoda ,  Atsuhito Sawabe ,  Hitoshi Iwasaki ,  Yuichi Ohsawa ,  Masashi Sahashi ,  Tadahiko Kobayashi

    发明人： Hiroaki Yoda ,  Atsuhito Sawabe ,  Hitoshi Iwasaki ,  Yuichi Ohsawa ,  Masashi Sahashi ,  Tadahiko Kobayashi

    IPC分类号： G11B539

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3903 ,  G11B5/3977 ,  G11B2005/3996

    摘要： A magneto-resistance effect head records and reproduces recorded magnetic material. The magneto-resistance effect head has a magneto-resistance effect film connected to a pair of leads. Additionally, a magnetic yoke, with a first and second magnetic yoke member, directs a signal magnetic field from a recording medium to the magneto-resistance effect film. The magneto-resistance effect head is constructed such that the first and second magnetic yoke members have surfaces that face the recording medium. The surfaces of the first and second magnetic yoke members have a magnetic gap between them. Additionally, the magneto-resistance effect film is recessed from the medium facing surfaces by a predetermined distance. Moreover, the first and second magnetic yoke members are aligned almost in parallel with the magnetic flux flow from the recording medium to the first magnetic yoke member, the magneto-resistance effect film, and the second magnetic yoke member.

    摘要翻译： 磁阻效应头记录和再现记录的磁性材料。 磁阻效应头具有连接到一对引线的磁阻效应膜。 此外，具有第一和第二磁轭构件的磁轭将来自记录介质的信号磁场引导到磁阻效应膜。 磁阻效应头被构造成使得第一和第二磁轭构件具有面向记录介质的表面。 第一和第二磁轭构件的表面之间具有磁隙。 此外，磁阻效应膜从面向介质的表面凹陷预定距离。 此外，第一和第二磁轭构件几乎与从记录介质到第一磁轭构件，磁阻效应膜和第二磁轭构件的磁通流平行排列。

    Magnetic head
    9.
    发明授权
    Magnetic head 失效
    磁头

    公开(公告)号：US6157525A

    公开(公告)日：2000-12-05

    申请号：US340717

    申请日：1999-06-29

    申请人： Hitoshi Iwasaki ,  Reiko Kondoh ,  Hiroaki Yoda ,  Yuichi Ohsawa ,  Yuzo Kamiguchi ,  Susumu Hashimoto

    发明人： Hitoshi Iwasaki ,  Reiko Kondoh ,  Hiroaki Yoda ,  Yuichi Ohsawa ,  Yuzo Kamiguchi ,  Susumu Hashimoto

    IPC分类号： G11B5/39

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

    摘要： A magnetoresistive head includes a magnetoresistive effect element including a magnetoresistive film, which has a first ferromagnetic layer and a second ferromagnetic layer separated by a nonmagnetic layer. A magnetization direction of the first ferromagnetic layer is perpendicular to a magnetization direction of the second ferromagnetic layer when a signal magnetic field is zero. A pair of bias layers provide magnetic bias, and a top surface of each of the pair of bias layers faces a lower surface of each edge region of the magnetoresistive film. A pair of lead electrodes produce a current flow through the magnetoresistive film, and each of the pair of lead electrodes is disposed on or above the magnetoresistive film.

    摘要翻译： 磁阻头包括具有磁阻膜的磁阻效应元件，该磁阻效应元件具有由非磁性层分离的第一铁磁层和第二铁磁层。 当信号磁场为零时，第一铁磁层的磁化方向垂直于第二铁磁层的磁化方向。 一对偏置层提供磁偏置，并且该对偏压层中的每一个的顶表面面对磁阻膜的每个边缘区域的下表面。 一对引线电极产生通过磁阻膜的电流，并且一对引线电极中的每一个设置在磁阻膜上或上方。