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    Thin film magnetic head having an improved coil
    1.
    发明授权
    Thin film magnetic head having an improved coil 失效
    具有改进线圈的薄膜磁头

    公开(公告)号：US4760481A

    公开(公告)日：1988-07-26

    申请号：US888116

    申请日：1986-07-22

    申请人： Isamu Yuito ,  Eijin Moriwaki ,  Kazuo Shiiki ,  Keiko Shiokawa ,  Yoshihiro Hamakawa ,  Saburo Suzuki ,  Harunobu Saito

    发明人： Isamu Yuito ,  Eijin Moriwaki ,  Kazuo Shiiki ,  Keiko Shiokawa ,  Yoshihiro Hamakawa ,  Saburo Suzuki ,  Harunobu Saito

    IPC分类号： B07B13/02 ,  B07B13/18 ,  G11B5/31 ,  G11B5/20 ,  G11B5/12

    CPC分类号： G11B5/3163

    摘要： Disclosed is a thin film magnetic head having a structure wherein the main portion of a coil consists of a copper or copper alloy layer and its upper surface is covered with a thin film mask consisting of titanium, titanium oxide, chromium and/or chromium oxide. The magnetic head of the invention can prevent the occurrence of projecting etching residues at the upper edge portion of the coil and can easily increase the cross-sectional area and the winding density of the coil. Furthermore, when the thin film mask consists of titanium and/or titanium oxide, a titanium diffusion prevention film consisting of chromium, for example, is interposed between the thin film mask and the copper or copper alloy, so that the resistance change of the coil scarcely takes place owing to heat treatment in a production process after the formation of the coil and the head reliability can be further improved.

    摘要翻译： 公开了一种薄膜磁头，其结构是线圈的主要部分由铜或铜合金层组成，其上表面被由钛，氧化钛，铬和/或氧化铬组成的薄膜掩模覆盖。 本发明的磁头可以防止在线圈的上边缘部分产生突出的蚀刻残留物，并且可以容易地增加线圈的横截面面积和卷绕密度。 此外，当薄膜掩模由钛和/或氧化钛组成时，例如由铬组成的钛扩散防止膜插入在薄膜掩模和铜或铜合金之间，使得线圈的电阻变化 由于在线圈形成后的生产过程中的热处理几乎不发生，并且可以进一步提高头的可靠性。

    Thin film magnetic head
    2.
    发明授权
    Thin film magnetic head 失效
    薄膜磁头

    公开(公告)号：US4881144A

    公开(公告)日：1989-11-14

    申请号：US142697

    申请日：1988-01-11

    申请人： Isamu Yuito ,  Eijin Moriwaki ,  Kazuo Shiiki ,  Yoshihiro Hamakawa ,  Hisashi Takano

    发明人： Isamu Yuito ,  Eijin Moriwaki ,  Kazuo Shiiki ,  Yoshihiro Hamakawa ,  Hisashi Takano

    IPC分类号： G11B5/31

    CPC分类号： G11B5/3163

    摘要： In a thin film magnetic head of the type wherein a lower magnetic pole, a gap layer, a first insulating layer, a coil, a second insulating layer and an upper magnetic pole are formed sequentially on a substrate, the present invention provides a thin film magnetic head characterized in that a surface active layer made of aluminum oxide, for example, is disposed between the first insulating layer and the second insulating layer except where the coil is formed on the first insulating layer so that the surface active layer is disposed between the coil and the second insulating layer. According to the present invention, it is possible to prevent the occurrence of bubbles between coil conductors, and eventually to improve flatness of the surface of the second insulating layer and to prevent degradation of the characteristics of the upper magnetic pole.

    摘要翻译： 在基板上依次形成下列磁极，间隙层，第一绝缘层，线圈，第二绝缘层和上磁极的薄膜磁头，本发明提供一种薄膜 磁头，其特征在于，例如在第一绝缘层和第二绝缘层之间设置由氧化铝制成的表面有源层，除了在第一绝缘层上形成线圈之外，表面活性层设置在第一绝缘层之间 线圈和第二绝缘层。 根据本发明，能够防止线圈导体之间产生气泡，最终提高第二绝缘层的表面的平坦性，防止上磁极的特性劣化。

    Thin film magnetic head having at least one magnetic core member made at least partly of a material having a high saturation magnetic flux density
    3.
    发明授权
    Thin film magnetic head having at least one magnetic core member made at least partly of a material having a high saturation magnetic flux density 失效
    薄膜磁头具有至少部分地由具有高饱和磁通密度的材料制成的至少一个磁芯构件

    公开(公告)号：US5126907A

    公开(公告)日：1992-06-30

    申请号：US525666

    申请日：1990-05-21

    申请人： Yoshihiro Hamakawa ,  Isamu Yuito ,  Hisashi Takano ,  Naoki Koyama ,  Eijin Moriwaki ,  Shinobu Sasaki ,  Kazuo Shiiki

    发明人： Yoshihiro Hamakawa ,  Isamu Yuito ,  Hisashi Takano ,  Naoki Koyama ,  Eijin Moriwaki ,  Shinobu Sasaki ,  Kazuo Shiiki

    IPC分类号： G11B5/31

    CPC分类号： G11B5/3153 ,  G11B5/3113

    摘要： A thin film magnetic head has a first magnetic core member carried by a substrate, a gap layer formed on the first magnetic core member, and a second magnetic core member formed in a spaced relation with the first magnetic core member. The second magnetic core member is coupled to the first magnetic core member to form a magnetic path and to have an end portion of the gap layer sandwiched by gap defining portions of the first and second magnetic core members. A coil conductor is wound about the magnetic path. In one embodiment, the first magnetic core member includes a first magnetic layer made of a magnetic material having stable magnetic properties during heat treatment and the second magnetic core member includes a second magnetic layer made of a material having a saturation flux density higher than that of the material of the first magnetic core member.

    摘要翻译： 薄膜磁头具有由基板承载的第一磁芯构件，形成在第一磁芯构件上的间隙层和与第一磁芯构件间隔开地形成的第二磁芯构件。 第二磁芯部件耦合到第一磁芯部件以形成磁路，并且间隙层的端部夹在第一和第二磁芯部件的间隙限定部分之间。 线圈导体缠绕在磁路上。 在一个实施例中，第一磁芯构件包括由在热处理期间具有稳定磁特性的磁性材料制成的第一磁性层，第二磁芯构件包括由饱和磁通密度高于 第一磁芯构件的材料。