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    Magnetoresistive thin-film magnetic head and method of fabrication thereof
    2.
    发明授权
    Magnetoresistive thin-film magnetic head and method of fabrication thereof 失效
    磁阻薄膜磁头及其制造方法

    公开(公告)号：US5701221A

    公开(公告)日：1997-12-23

    申请号：US416653

    申请日：1995-04-05

    申请人： Akira Taniyama ,  Makoto Morijiri ,  Haruko Tanaka ,  Isamu Yuito ,  Eiji Ashida ,  Hiroaki Koyanagi ,  Hideo Tanabe ,  Tetsuo Kobayashi

    发明人： Akira Taniyama ,  Makoto Morijiri ,  Haruko Tanaka ,  Isamu Yuito ,  Eiji Ashida ,  Hiroaki Koyanagi ,  Hideo Tanabe ,  Tetsuo Kobayashi

    IPC分类号： G11B5/31 ,  G11B5/39

    CPC分类号： G11B5/3906 ,  G11B5/3163 ,  G11B5/3903 ,  G11B5/3932

    摘要： A magnetic domain controlling film for controlling the magnetic domain of a magnetoresistive film is formed by a patterning technique on a lower insulating film formed on a lower shield film. The magnetoresistive film is formed on the magnetic domain controlling film for converting a magnetic signal from a magnetic recording medium into an electrical signal using the magnetoresistive effect. A resist pattern is formed by the lift-off method on the magnetoresistive film in such a fashion as to leave a region of the magnetoresistive film corresponding to the tracks of the magnetic recording medium. A magnetoresistive element is formed by ion milling leaving only the portion of the magnetoresistive film corresponding to the tracks. An insulating layer is formed on the resist pattern, on the upper surface region of the lower insulating film other than the portion thereof right under the magnetic domain controlling film reduced in thickness by ion milling, and on the upper surface region of the magnetic domain controlling film other than the portion thereof right under the magnetoresistive film. An electrode film is formed on the insulating layer, after which the resist pattern is removed. The insulating layer is contiguously deposited on the upper surface region formed in a thin layer of the lower insulating film and on a part of the upper surface region formed in a thin layer of the magnetic domain controlling film.

    摘要翻译： 用于控制磁阻膜的磁畴的磁畴控制膜通过在下屏蔽膜上形成的下绝缘膜上的图案化技术形成。 磁阻膜形成在磁畴控制膜上，用于使用磁阻效应将来自磁记录介质的磁信号转换成电信号。 通过剥离方法在磁阻膜上形成抗蚀剂图案，以便留下与磁记录介质的轨道相对应的磁阻膜的区域。 通过离子铣削形成磁阻元件，仅留下对应于轨道的磁阻膜的部分。 绝缘层形成在抗蚀剂图案上，除了通过离子研磨在厚度减小的磁畴控制膜的正下方的部分的下部绝缘膜的上表面区域上形成绝缘层，并且在磁畴控制的上表面区域 膜之外的其它部分即刻在磁阻膜的正下方。 在绝缘层上形成电极膜，然后除去抗蚀剂图案。 绝缘层连续沉积在形成在下绝缘膜的薄层中的上表面区域和形成在磁畴控制膜的薄层中的上表面区域的一部分上。

    Thin film magnetic head and production method thereof and magnetic disk drive equipped with this thin film magnetic head
    5.
    发明授权
    Thin film magnetic head and production method thereof and magnetic disk drive equipped with this thin film magnetic head 失效
    薄膜磁头及其制造方法以及配备该薄膜磁头的磁盘驱动器

    公开(公告)号：US5687045A

    公开(公告)日：1997-11-11

    申请号：US554027

    申请日：1995-11-06

    申请人： Tetsuya Okai ,  Moriaki Fuyama ,  Akira Onuma ,  Eiji Ashida ,  Hiroshi Ikeda ,  Saburo Suzuki ,  Yasuo Wakaki ,  Yoshiki Hagiwara ,  Eimi Ando

    发明人： Tetsuya Okai ,  Moriaki Fuyama ,  Akira Onuma ,  Eiji Ashida ,  Hiroshi Ikeda ,  Saburo Suzuki ,  Yasuo Wakaki ,  Yoshiki Hagiwara ,  Eimi Ando

    IPC分类号： G11B5/31 ,  G11B5/60 ,  G11B5/235

    CPC分类号： G11B5/6005 ,  G11B5/3106 ,  G11B5/3109 ,  G11B5/3116 ,  G11B5/3163

    摘要： A thin film magnetic head comprising a sintered ceramic substrate, an underlayer, a bottom magnetic core film, a magnetic gap film, an insulating film containing coil windings, a top magnetic core film, and a protective layer. The substrate and other films and layers form an air bearing surface. The under layer, the magnetic gap film and the protective layer comprise Al.sub.2 O.sub.3, and the bottom and the top magnetic core films comprise Ni--Fe alloy. This structure gives substantially the same etching rate, when the air bearing surface is polished using a working fluid of pH 6-8, for any of the substrate, the films comprising Al.sub.2 O.sub.3 and metal oxide described above, and the films of Ni--Fe alloy. Thus, steps (pole top recessions) on the air bearing surface can be made as small as 0.015 .mu.m or less. Accordingly, the magnetic head can be held in a stable attitude, thus obtaining good recording characteristics.

    摘要翻译： 一种薄膜磁头，包括烧结陶瓷衬底，底层，底部磁芯膜，磁隙膜，含有线圈绕组的绝缘膜，顶部磁芯膜和保护层。 衬底和其它膜和层形成空气轴承表面。 底层，磁隙膜和保护层包括Al2O3，底部和顶部磁芯膜包括Ni-Fe合金。 当使用pH6-8的工作流体对任何基板，包含上述Al 2 O 3和金属氧化物的膜以及Ni-Fe合金膜进行抛光时，该结构基本上具有相同的蚀刻速率 。 因此，空气轴承表面上的台阶（极顶部凹陷）可以制成小至0.015μm或更小。 因此，可以将磁头保持在稳定的姿态，从而获得良好的记录特性。

    Method of electrode current control in welding apparatus having a plurality of electrodes
    6.
    发明授权
    Method of electrode current control in welding apparatus having a plurality of electrodes 失效
    具有多个电极的焊接设备中的电极电流控制方法

    公开(公告)号：US4396823A

    公开(公告)日：1983-08-02

    申请号：US313832

    申请日：1981-10-22

    申请人： Masayasu Nihei ,  Satoshi Kokura ,  Eiji Ashida ,  Yuzo Kozono ,  Akira Onuma

    发明人： Masayasu Nihei ,  Satoshi Kokura ,  Eiji Ashida ,  Yuzo Kozono ,  Akira Onuma

    IPC分类号： B23K9/167 ,  B23K9/00 ,  B23K9/073 ,  B23K9/10 ,  B23K9/16 ,  B23K9/09

    CPC分类号： B23K9/1068

    摘要： In a welding apparatus having a plurality of electrodes and adapted for carrying out welding operation on a workpiece by alternately supplying currents to the individual electrodes through switching elements, an apparatus and method of controlling the currents supplied to the electrodes, comprising selecting the values of the currents supplied to the individual electrodes depending on the material of the workpiece, and carrying out the welding operation on the workpiece by alternately supplying the currents of the selected values to the individual electrodes respectively through the switching elements. The method is featured by the fact that the ratio between the individual currents is selected under the condition that the sum of the values of all the currents is maintained at a predetermined value. It is also featured by the fact that, depending on the welding condition, the values of the individual currents can be freely selected without the limitation of maintaining the sum of all the currents at the predetermined value. Therefore, the apparatus and method are applicable to welding of a variety of materials by selecting the values of the individual currents depending on whether the workpiece has a high or low melting point and also whether the workpiece has a high or low heat conductivity.

    摘要翻译： 在具有多个电极的焊接装置中，适于通过交替地通过开关元件向各个电极提供电流来对工件进行焊接操作的装置和方法，包括：选择所述电极的电流值 根据工件的材料供应到各个电极的电流，并且通过交替地通过开关元件将选定值的电流交替地提供给各个电极，从而对工件进行焊接操作。 该方法的特征在于，在所有电流的值的总和保持在预定值的条件下选择各个电流之间的比率。 这也是因为根据焊接条件，可以自由地选择各个电流的值，而不必将所有电流的总和保持在预定值。 因此，该装置和方法适用于通过根据工件是高熔点还是低熔点选择各个电流值以及工件是否具有高导热性或低导热性来对各种材料进行焊接。

    Magnetoresistive head
    8.
    发明授权
    Magnetoresistive head 失效
    磁阻头

    公开(公告)号：US5436777A

    公开(公告)日：1995-07-25

    申请号：US941248

    申请日：1992-09-04

    申请人： Susumu Soeya ,  Shigeru Tadokoro ,  Takao Imagawa ,  Eiji Ashida ,  Moriaki Fuyama ,  Shinji Narishige ,  Kouichi Nishioka

    发明人： Susumu Soeya ,  Shigeru Tadokoro ,  Takao Imagawa ,  Eiji Ashida ,  Moriaki Fuyama ,  Shinji Narishige ,  Kouichi Nishioka

    IPC分类号： G11B5/00 ,  G11B5/012 ,  G11B5/31 ,  G11B5/39

    CPC分类号： G11B5/3932 ,  G11B5/012 ,  G11B5/3903 ,  G11B5/398 ,  G11B5/399 ,  G11B2005/0016 ,  G11B5/3113 ,  G11B5/313

    摘要： A magnetoresistive head has a substrate (1) and, on the substrate, a magnetoresistive film (40) for converting a magnetic signal into an electric signal by using magnetoresistance effects and a pair of electrodes (60) for causing a signal detection current to flow through the magnetoresistive film. A pair of first domain wall suppressing layers (30) are arranged at opposite end portions of the magnetoresistive film, respectively, to apply a longitudinal magnetic bias to the magnetoresistive film. A second domain wall suppressing layer (45) is also provided for applying a longitudinal magnetic bias, which is weaker compared with the longitudinal magnetic bias applied by the first domain wall suppressing layers, to the magnetoresistive film (40).

    摘要翻译： 磁阻头具有衬底（1），并且在衬底上具有用于通过使用磁阻效应将磁信号转换为电信号的磁阻膜（40）和用于使信号检测电流流动的一对电极（60） 通过磁阻膜。 一对第一畴壁抑制层（30）分别布置在磁阻膜的相对端部，以将纵向磁偏压施加到磁阻膜。 还提供了第二畴壁抑制层（45），用于施加与由第一畴壁抑制层施加的纵向磁偏压相比较对磁阻膜（40）较弱的纵向磁偏压。

    Hybrid Welding Method of Laser Welding and Arc Welding for T-Joint
    10.
    发明申请
    Hybrid Welding Method of Laser Welding and Arc Welding for T-Joint 审中-公开
    T型接头激光焊接和电弧焊接混合焊接方法

    公开(公告)号：US20140124489A1

    公开(公告)日：2014-05-08

    申请号：US14129121

    申请日：2012-05-18

    申请人： Xudong Zhang ,  Eiji Ashida ,  Shoh Tarasawa ,  Yukihiro Soga

    发明人： Xudong Zhang ,  Eiji Ashida ,  Shoh Tarasawa ,  Yukihiro Soga

    IPC分类号： B23K28/02

    CPC分类号： B23K28/02 ,  B23K26/242 ,  B23K26/348 ,  B23K33/004

    摘要： A hybrid welding method of laser welding and arc welding for a T-joint in which a rib as one member to be welded abuts orthogonally onto a surface of a flange as other member to be welded includes forming a groove portion on a lateral surface of the rib that is an abutting part between the rib and the flange forming the T-joint; forming a flat part at a bottom part of the groove portion formed in the abutting part between the rib and the flange; and performing a hybrid welding using both laser welding in which the groove portion A with this flat part therein is irradiated with a laser beam, and arc welding, to form weld beads of weld metal in the groove portion A, so that welding together the flange and the rib forming the T-joint.

    摘要翻译： 一种用于T形接头的激光焊接和电弧焊接的混合焊接方法，其中作为待焊接的一个构件的肋作为待焊接的构件正交地邻接在法兰的表面上，包括在所述焊接的侧表面上形成槽部 肋是肋和形成T形接头的凸缘之间的抵接部分; 在形成在肋和凸缘之间的抵接部分中的槽部的底部处形成平坦部分; 并且使用激光焊接进行混合焊接，其中利用激光束对其中的该平坦部分的槽部分A进行激光焊接和电弧焊接，以在槽部分A中形成焊接金属的焊缝，从而将凸缘 和形成T形接头的肋。