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    Magnetic head and method of production thereof
    1.
    发明授权
    Magnetic head and method of production thereof 失效
    磁头及其制造方法

    公开(公告)号：US4354212A

    公开(公告)日：1982-10-12

    申请号：US166808

    申请日：1980-07-08

    申请人： Norimoto Nouchi ,  Kenji Kanai ,  Nobuyuki Kaminaka ,  Noboru Nomura

    发明人： Norimoto Nouchi ,  Kenji Kanai ,  Nobuyuki Kaminaka ,  Noboru Nomura

    IPC分类号： G11B5/39 ,  G11B5/12 ,  G11B5/30

    CPC分类号： G11B5/3932

    摘要： A magnetic head and a production method therefore in which permanent magnet films for applying a DC bias magnetic field Hd h to a magnetoresistive effect element film (MR element film) is arranged on both sides of the thickness dimension of the MR element film through at least a non-magnetic film therebetween. In making the MR element film thicker in order to reduce distortion, the DC bias magnetic field Hd b to be applied to the MR element film is also required to be increased. Unlike the prior art in which the above-mentioned requirement is met by increasing the thickness of the permanent magnet film under the thickness of the MR element film resulting in the problem of breakage of a film member above or under the thickness of the permanent magnet film, the invention further comprises a second permanent magnet film above the thickness of the MR element film without increasing the thickness of the first permanent magnet film. In the case of a magnetic head with a shield members of soft magnetic material holding the MR element film from both sides of the thickness thereof, the MR element film is made thicker to make reproduction possible without any distortion or without substantially increasing the gap. For this purpose, the MR element film is held on the sides above and under the thickness thereof by first and second permanent magnet films which in turn are held by the shield members. To minimize distribution of the MR element film, a comparatively high-temperature process after forming of the MR element film i.e., forming of the second permanent magnet film is effected at optimum temperature, and a magnetic field is applied along the magnetic easy axis of the MR element film.

    摘要翻译： 因此，磁头及其制造方法，其中用于将DC偏置磁场Hd h施加到磁阻效应元件膜（MR元件膜）的永磁体膜至少布置在MR元件膜的厚度尺寸的两侧 它们之间的非磁性膜。 为了使MR元件膜变厚以减少畸变，还需要增加施加到MR元件膜的DC偏置磁场Hd b。 不同于通过在MR元件膜的厚度下增加永磁体膜的厚度来满足上述要求的现有技术，导致膜构件在永磁体膜的厚度以上或以下的厚度的断裂的问题 本发明还包括在MR元件膜的厚度之上的第二永磁体膜，而不增加第一永磁体膜的厚度。 在具有从其厚度的两侧保持MR元件膜的软磁材料的屏蔽构件的磁头的情况下，将MR元件膜制成更厚以使得再现成为可能而没有任何变形或基本上不增加间隙。 为此，MR元件膜通过第一和第二永磁体膜保持在其厚度的上方和下方，该永磁体膜又由屏蔽部件保持。 为了最小化MR元件膜的分布，在形成MR元件膜之后进行比较高温处理，即形成第二永久磁铁膜，在最佳温度下进行，沿着磁性容易轴施加磁场 MR元件膜。

    Magnetic head comprising a core formed of small and large thin film patterns
    4.
    发明授权
    Magnetic head comprising a core formed of small and large thin film patterns 失效
    磁头包括由小而大的薄膜图案形成的芯

    公开(公告)号：US4716484A

    公开(公告)日：1987-12-29

    申请号：US619917

    申请日：1984-06-12

    申请人： Nobuyuki Kaminaka ,  Yasuo Yoshida

    发明人： Nobuyuki Kaminaka ,  Yasuo Yoshida

    IPC分类号： G11B5/31 ,  G11B5/127 ,  G11B5/147

    CPC分类号： G11B5/3163 ,  G11B5/3116

    摘要： A thin film magnetic head comprising a magnetic core of accumulation layers forming a magnetic circuit and including at least two layers of magnetic film with a particular magnetic characteristic. The constitution of completely covering a magnetic film with a small pattern by a magnetic film with a large pattern makes the edge part smooth because the end of the underlying magnetic film is covered with the upper magnetic film. This edge-smoothing effect appears most pronounced in a manufacturing method in which electrodeposition is used for the formation of magnetic films. By sequentially forming the magnetic films from that of a smaller pattern towards that of a larger pattern, the film formation proceeds at step parts such as end parts of the underlying magnetic films due to the levelling action which is inherent in the electrodeposition method. Such a film formation realizes extremely smooth shielding and yet the pattern formation can be carried out by a single step of photoresist coating to shorten the production process.

    摘要翻译： 一种薄膜磁头，包括形成磁路的累积层的磁芯，并且包括具有特定磁特性的至少两层磁性膜。 通过具有大图案的磁性膜完全覆盖具有小图案的磁性膜的结构使得边缘部分光滑，因为下面的磁性膜的末端被上部磁性膜覆盖。 这种边缘平滑效果在电沉积用于形成磁性膜的制造方法中显现出最显着。 通过从较小图案向较大图案的磁膜顺序地形成磁膜，由于电沉积方法固有的调平作用，膜形成在诸如底层磁性膜的端部的步骤部分进行。 这种膜形成实现了非常光滑的屏蔽，但是可以通过光刻胶涂覆的一个步骤来进行图案形成，以缩短生产过程。

    Magnetic head having electromechanical transducer disposed at one end thereof
    5.
    发明授权
    Magnetic head having electromechanical transducer disposed at one end thereof 失效
    具有设置在其一端的机电换能器的磁头

    公开(公告)号：US4672496A

    公开(公告)日：1987-06-09

    申请号：US400596

    申请日：1982-07-22

    申请人： Kenji Kanai ,  Nobuyuki Kaminaka ,  Noboru Nomura ,  Yuuji Omata

    发明人： Kenji Kanai ,  Nobuyuki Kaminaka ,  Noboru Nomura ,  Yuuji Omata

    IPC分类号： G11B5/127 ,  G11B5/49 ,  G11B5/147

    CPC分类号： G11B5/4907 ,  G11B5/1278

    摘要： A thin magnetic film is deposited over a nonmagnetic or piezoelectric substrate. When a shock wave is propagated through this substrate from its one end to the other end, the permeability of the thin magnetic film is locally increased and a portion or region having a high permeability also travels from one end to the other end of the thin magnetic film in unison with the shock wave. A magnetic core with a signal winding is disposed and magnetically coupled with the thin magnetic film. The signal can be recorded or reproduced while the recording medium is scanned.

    摘要翻译： 薄磁膜沉积在非磁性或压电衬底上。 当冲击波从其一端传播到另一端时，薄磁性膜的磁导率局部增加，并且具有高磁导率的部分或区域也从薄磁体的一端到另一端传播 电影与冲击波一致。 具有信号绕组的磁芯被设置并与薄磁膜磁耦合。 可以在扫描记录介质时记录或再现信号。

    Magnetoresistive element
    6.
    发明授权
    Magnetoresistive element 失效
    磁阻元件

    公开(公告)号：US4477794A

    公开(公告)日：1984-10-16

    申请号：US406894

    申请日：1982-08-10

    申请人： Noboru Nomura ,  Kenji Kanai ,  Nobuyuki Kaminaka ,  Yuji Omata

    发明人： Noboru Nomura ,  Kenji Kanai ,  Nobuyuki Kaminaka ,  Yuji Omata

    IPC分类号： G11B5/39 ,  H01L43/08 ,  G11B5/30

    CPC分类号： G11B5/3903 ,  H01L43/08

    摘要： The invention provides a magnetoresistive element which magnetostatically has magnetic anisotropy to control a domain structure and which eliminates Barkhousen noise that will cause abrupt movement of domain walls and irregular magnetization due to a change in the signal magnetic field, wherein a grating pattern is formed on at least one surface of a magnetoresistive film by a process in which a grating pattern is unidirectionally formed on the surface of a substrate and the magnetoresistive film of a ferromagnetic body is deposited thereon. Further, various magnetoresistive elements to which a novel bias method is applied are provided.

    摘要翻译： 本发明提供一种磁阻元件，其磁静态地具有磁各向异性以控制畴结构，并且消除了由于信号磁场的变化引起的畴壁突然移动和不规则磁化的巴克霍森噪声，其中光栅图案形成在 通过在基板的表面上单向形成光栅图案并且在其上沉积铁磁体的磁阻膜的工艺，形成磁阻膜的至少一个表面。 此外，提供了应用了新的偏置方法的各种磁阻元件。

    High sensitivity magnetic head using magneto-resistive effect element
    7.
    发明授权
    High sensitivity magnetic head using magneto-resistive effect element 失效
    高灵敏度磁头使用磁阻效应元件

    公开(公告)号：US4068272A

    公开(公告)日：1978-01-10

    申请号：US632761

    申请日：1975-11-17

    申请人： Kenji Kanai ,  Nobuyuki Kaminaka ,  Norimoto Nouchi ,  Noboru Nomura

    发明人： Kenji Kanai ,  Nobuyuki Kaminaka ,  Norimoto Nouchi ,  Noboru Nomura

    IPC分类号： G11B5/39 ,  G11B5/12 ,  G11B5/30

    CPC分类号： G11B5/3925 ,  G11B5/3903 ,  G11B5/3977 ,  G11B5/398

    摘要： This invention provides a high sensitivity magnetic head using magneto-resistive effect elements consisting of ferromagnetic thin plates and allows construction of a high precision multi-track head by using thin film and photo-etching techniques. The magnetic head comprises a base, two flux converging cores forming a magnetic gap, a detecting portion provided between the two flux converging cores and extending at right angles to the end of the base, one end of the detecting portion being located in the neighborhood of the gap and having a smaller sectional area than the other portions, and detecting electrodes provided at the opposite ends of the detecting portion. At least one of the two cores is of a ferromagnetic material and integrally formed on the base.

    摘要翻译： 本发明提供了使用由铁磁薄板构成的磁阻效应元件的高灵敏度磁头，并且通过使用薄膜和光蚀刻技术来构造高精度多轨头。 磁头包括基座，形成磁隙的两个磁通会聚磁芯，设置在两个磁通会聚磁芯之间并与基座的端部成直角延伸的检测部分，检测部分的一端位于 所述间隙具有比其他部分更小的截面面积，以及设置在所述检测部分的相对端的检测电极。 两个芯中的至少一个是铁磁材料并且一体地形成在基部上。

    Magnetic head for perpendicular magnetic recording and reproduction
    8.
    发明授权
    Magnetic head for perpendicular magnetic recording and reproduction 失效
    用于垂直磁记录和再现的磁头

    公开(公告)号：US4745506A

    公开(公告)日：1988-05-17

    申请号：US89945

    申请日：1987-08-26

    申请人： Kazuo Nakamura ,  Seishi Sasaki ,  Ken Takahashi ,  Hiroshi Yohda ,  Nobuyuki Kaminaka

    发明人： Kazuo Nakamura ,  Seishi Sasaki ,  Ken Takahashi ,  Hiroshi Yohda ,  Nobuyuki Kaminaka

    IPC分类号： G11B5/127 ,  G11B5/17 ,  G11B5/31 ,  G11B5/147 ,  G11B5/187 ,  G11B5/23

    CPC分类号： G11B5/1278 ,  G11B5/17 ,  G11B5/3103

    摘要： A perpendicular magnetic head of high recording and reproducing efficiency which integrally incorporates a step-up transformer. A main pole for picking up a reproduce magnetic flux from a recording medium and applying recording magnetic field thereto is formed of a magnetic thin film. A signal winding formed of a thin film is disposed in the immediate vicinity of the forward end of the main pole so as to have a high conversion sensitivity per turn with respect to the reproduce magnetic flux from the recording medium. The signal winding which itself constitutes a closed circuit interlinks a magnetic path of the step-up transformer, thereby forming a primary winding of the transformer. A secondary winding from which head output is taken out is wound in the magnetic path of the transformer.

    摘要翻译： 具有高记录和再现效率的垂直磁头，其整体结合了升压变压器。 用于从记录介质拾取再现磁通并向其施加记录磁场的主极由磁性薄膜形成。 由薄膜形成的信号绕组设置在主极的前端附近，以便相对于来自记录介质的再现磁通具有高的每转转换灵敏度。 本身构成闭路的信号绕组使升压变压器的磁路相互连接，从而形成变压器的初级绕组。 取出头部输出的次级绕组缠绕在变压器的磁路中。

    Magnetoresistive thin film head
    9.
    发明授权
    Magnetoresistive thin film head 失效
    磁阻薄膜头

    公开(公告)号：US4663683A

    公开(公告)日：1987-05-05

    申请号：US629546

    申请日：1984-07-03

    申请人： Hiroshi Youda ,  Nobuyuki Kaminaka ,  Satoru Mitani

    发明人： Hiroshi Youda ,  Nobuyuki Kaminaka ,  Satoru Mitani

    IPC分类号： G11B5/39 ,  G11B5/127 ,  G11B5/33

    CPC分类号： G11B5/3906 ,  G11B5/3903

    摘要： In a magnetic head which utilizes the magnetoresistive effect of a ferromagnetic thin film, it is possible to realize a magnetoresistive effect type thin film magnetic head with favorable secondary distortion characteristics by forming on at least one surface of the ferromagnetic thin film, a grating forming an angle larger than 60.degree. and smaller than 80.degree. with respect to the direction of the electric current flowing through the thin film. By setting the grating into more than two different directions, a magnetic head capable of functioning at a still smaller distortion is presented.

    摘要翻译： PCT No.PCT / JP83 / 00401 Sec。 371日期1984年7月3日 102（e）日期1984年7月3日PCT提交1983年11月10日PCT公布。 出版物WO84 / 02028 日期：1984年5月24日。在利用铁磁性薄膜的磁阻效应的磁头中，可以通过在铁磁薄膜的至少一个表面上形成具有良好二次畸变特性的磁阻效应型薄膜磁头 薄膜，相对于流过薄膜的电流方向形成大于60°且小于80°的角度的光栅。 通过将光栅设置成多于两个不同的方向，可以提供能够以更小失真工作的磁头。