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    Yoke type magnetoresistance head and manufacturing method of the same
    1.
    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。

    Magnetic head
    3.
    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。

    Differential detection magnetoresistance head with laminated structure
    6.
    发明授权
    Differential detection magnetoresistance head with laminated structure 失效
    差分检测磁阻头与层叠结构

    公开(公告)号：US06483673B1

    公开(公告)日：2002-11-19

    申请号：US09085101

    申请日：1998-05-28

    申请人： Hitoshi Iwasaki ,  Yuichi Ohsawa ,  Reiko Kondoh ,  Yuzo Kamiguchi ,  Susumu Hashimoto ,  Tomomi Funayama ,  Hiromi Fuke ,  Junichi Akiyama ,  Kazuhiro Saito

    发明人： Hitoshi Iwasaki ,  Yuichi Ohsawa ,  Reiko Kondoh ,  Yuzo Kamiguchi ,  Susumu Hashimoto ,  Tomomi Funayama ,  Hiromi Fuke ,  Junichi Akiyama ,  Kazuhiro Saito

    IPC分类号： G11B539

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/1278 ,  G11B5/3903 ,  G11B5/3954 ,  G11B2005/0029 ,  G11B2005/3996

    摘要： A GMR element part is formed of a laminated structure which comprises at least one pair of ferromagnetic layers and a nonmagnetic intermediate layer interposed between the pair of ferromagnetic layers. Signal magnetic field detecting ferromagnetic layers will be optionally disposed one each outside the pair of ferromagnetic layers. The GMR element part consists of a laminated structure which is provided with one pair of GMR ferromagnetic layers opposed to each other across a nonmagnetic intermediate layer or a laminated structure which is provided with one pair of GMR ferromagnetic layer opposed to each other across a nonmagnetic intermediate layer and at least one low-permeability ferromagnetic layer disposed there between through the medium of a nonmagnetic intermediate layer. The GMR element part functions as a read head for sensing the resistance which is varied when signal magnetic fields of mutual opposite directions are applied to the pair of GMR ferromagnetic layers and displaying a differential detection type output response. A granular type ferromagnetic intermediate layer will be used as the GMR element part.

    摘要翻译： GMR元件部分由层叠结构形成，该叠层结构包括至少一对铁磁层和介于一对铁磁层之间的非磁性中间层。 信号磁场检测铁磁层将可选地布置在一对铁磁层的外侧。 GMR元件部分由层叠结构构成，该叠层结构具有一对跨越非磁性中间层彼此相对的GMR铁磁体层或层叠结构，该层叠结构具有跨越非磁性中间体彼此相对的一对GMR铁磁层 层和至少一个通过非磁性中间层的介质设置在其间的低磁导率铁磁层。 GMR元件部分用作读取头，用于感测当相互相反方向的信号磁场施加到一对GMR铁磁层并且显示差分检测型输出响应时变化的电阻。 将使用粒状铁磁中间层作为GMR元件部分。

    Differential detection magnetoresistance head
    7.
    发明授权
    Differential detection magnetoresistance head 失效
    差分检测磁阻头

    公开(公告)号：US5828525A

    公开(公告)日：1998-10-27

    申请号：US401489

    申请日：1995-03-10

    申请人： Hitoshi Iwasaki ,  Yuichi Ohsawa ,  Reiko Kondoh ,  Yuzo Kamiguchi ,  Susumu Hashimoto ,  Tomomi Funayama ,  Hiromi Fuke ,  Junichi Akiyama ,  Kazuhiro Saito

    发明人： Hitoshi Iwasaki ,  Yuichi Ohsawa ,  Reiko Kondoh ,  Yuzo Kamiguchi ,  Susumu Hashimoto ,  Tomomi Funayama ,  Hiromi Fuke ,  Junichi Akiyama ,  Kazuhiro Saito

    IPC分类号： G11B5/00 ,  G11B5/127 ,  G11B5/39

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3903 ,  G11B5/3954 ,  G11B2005/0029 ,  G11B2005/3996 ,  G11B5/1278

    摘要： A GMR element part is formed of a laminated structure which comprises at least one pair of ferromagnetic layers and a nonmagnetic intermediate layer interposed between the pair of ferromagnetic layers. Signal magnetic field detecting ferromagnetic layers will be optionally disposed one each outside the pair of ferromagnetic layers. The GMR element part consists of a laminated structure which is provided with one pair of GMR ferromagnetic layers opposed to each other across a nonmagnetic intermediate layer or a laminated structure which is provided with one pair of GMR ferromagnetic layer opposed to each other across a nonmagnetic intermediate layer and at least one low-permeability ferromagnetic layer disposed there between through the medium of a nonmagnetic intermediate layer. The GMR element part functions as a read head for sensing the resistance which is varied when signal magnetic fields of mutual opposite directions are applied to the pair of GMR ferromagnetic layers and displaying a differential detection type output response. A granular type ferromagnetic intermediate layer will be used as the GMR element part.

    摘要翻译： GMR元件部分由层叠结构形成，该叠层结构包括至少一对铁磁层和介于一对铁磁层之间的非磁性中间层。 信号磁场检测铁磁层将可选地布置在一对铁磁层的外侧。 GMR元件部分由层叠结构构成，该叠层结构具有一对跨越非磁性中间层彼此相对的GMR铁磁体层或层叠结构，该层叠结构具有跨越非磁性中间体彼此相对的一对GMR铁磁层 层和至少一个通过非磁性中间层的介质设置在其间的低磁导率铁磁层。 GMR元件部分用作读取头，用于感测当相互相反方向的信号磁场施加到一对GMR铁磁层并且显示差分检测型输出响应时变化的电阻。 将使用粒状铁磁中间层作为GMR元件部分。

    Magnetoresistance effect element
    8.
    发明授权
    Magnetoresistance effect element 有权
    磁阻效应元件

    公开(公告)号：US6111729A

    公开(公告)日：2000-08-29

    申请号：US313767

    申请日：1999-05-18

    申请人： Yuzo Kamiguchi ,  Akiko Saito ,  Kazuhiro Saito ,  Hideaki Fukuzawa ,  Hitoshi Iwasaki ,  Masashi Sahashi

    发明人： Yuzo Kamiguchi ,  Akiko Saito ,  Kazuhiro Saito ,  Hideaki Fukuzawa ,  Hitoshi Iwasaki ,  Masashi Sahashi

    IPC分类号： G11B5/00 ,  G11B5/39 ,  H01F10/32 ,  H01L43/08

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3903 ,  G11B5/3909 ,  H01F10/3268 ,  H01L43/08 ,  G11B2005/3996 ,  G11B5/00 ,  G11B5/3967

    摘要： A magnetoresistance effect element provided with a spin valve film composed of a first magnetic layer formed on a metallic buffer layer, a middle non-magnetic layer formed on the first magnetic layer, and a second magnetic layer formed on the non-magnetic layer, has an atomic-diffusion barrier layer whose average thickness is 2 nm or less formed in the interface between the metallic buffer layer and the first magnetic layer. Or a magnetoresistance effect element provided with a spin valve film composed of a first magnetic layer composed of a laminated film of a magnetic undercoat layer and a ferromagnetic layer, a middle non-magnetic layer formed on the first magnetic layer, and a second magnetic layer formed on the middle non-magnetic layer, has an atomic-diffusion barrier layer whose average thickness is 2 nm or less formed in the interface between the magnetic undercoat layer and the ferromagnetic layer.

    摘要翻译： 设置有由形成在金属缓冲层上的第一磁性层，形成在第一磁性层上的中间非磁性层和形成在非磁性层上的第二磁性层构成的自旋阀膜的磁阻效应元件具有 在金属缓冲层和第一磁性层之间的界面形成平均厚度为2nm以下的原子扩散阻挡层。 或设置有由由磁性底涂层和铁磁层的层叠膜构成的第一磁性层，形成在第一磁性层上的中间非磁性层和第二磁性层构成的自旋阀膜的磁阻效应元件 在中间非磁性层上形成的平均厚度为2nm以下的原子扩散阻挡层形成在磁性底涂层和铁磁层之间的界面中。

    Yoke-type head with magneto-resistance effect film recessed from medium facing surface and extending across magnetic gap
    10.
    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。