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    Thin film magnetic head and production method thereof and magnetic disk drive equipped with this thin film magnetic head
    1.
    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。

    MAGNETIC HEAD FOR PERPENDICULAR RECORDING
    7.
    发明申请
    MAGNETIC HEAD FOR PERPENDICULAR RECORDING 有权
    磁头记录

    公开(公告)号：US20110141615A1

    公开(公告)日：2011-06-16

    申请号：US12965277

    申请日：2010-12-10

    申请人： Kazue Kudo ,  Hiromi Shiina ,  Yohji Maruyama ,  Shouji Tokutake ,  Tetsuya Okai

    发明人： Kazue Kudo ,  Hiromi Shiina ,  Yohji Maruyama ,  Shouji Tokutake ,  Tetsuya Okai

    IPC分类号： G11B21/02 ,  G11B5/33

    CPC分类号： G11B5/1278 ,  G11B5/11 ,  G11B5/3116 ,  G11B5/3146 ,  G11B5/315 ,  G11B5/3163 ,  G11B5/6005 ,  Y10T428/11 ,  Y10T428/1171

    摘要： According to one embodiment, a magnetic head for perpendicular recording includes a main pole, a first soft magnetic film disposed on a trailing side of the main pole, and a first nonmagnetic film interposed between the main pole and the first soft magnetic film. A thickness of the main pole is increased in a depth direction from an air bearing surface using an inclination, and a thickness of the first nonmagnetic film increases in the depth direction from the air bearing surface. In another embodiment, an angle from a horizontal plane of an upper surface of the first nonmagnetic film is greater than an angle from a horizontal plane of a lower surface of the first nonmagnetic film in contact with the main pole. Other heads, methods, and systems are described according to more embodiments.

    摘要翻译： 根据一个实施例，用于垂直记录的磁头包括主极，设置在主极的后侧的第一软磁膜和插在主极和第一软磁膜之间的第一非磁性膜。 主轴的厚度使用倾斜从空气轴承面在深度方向上增大，第一非磁性膜的厚度在空气轴承面的深度方向上增大。 在另一个实施例中，与第一非磁性膜的上表面的水平面的角度大于与主极接触的第一非磁性膜的下表面的水平面的角度。 根据更多实施例描述其它头，方法和系统。

    PERPENDICULAR MAGNETIC RECORDING HEAD AND MAGNETIC RECORDING DEVICE SUITABLE FOR HIGH-DENSITY MAGNETIC RECORDING
    8.
    发明申请
    PERPENDICULAR MAGNETIC RECORDING HEAD AND MAGNETIC RECORDING DEVICE SUITABLE FOR HIGH-DENSITY MAGNETIC RECORDING 有权
    适用于高密度磁记录的全磁记录磁头和磁记录装置

    公开(公告)号：US20110002063A1

    公开(公告)日：2011-01-06

    申请号：US12827999

    申请日：2010-06-30

    申请人： Yohji Maruyama ,  Tadayuki Iwakura ,  Tetsuya Okai ,  Hiromi Shiina ,  Kazue Kudo

    发明人： Yohji Maruyama ,  Tadayuki Iwakura ,  Tetsuya Okai ,  Hiromi Shiina ,  Kazue Kudo

    IPC分类号： G11B21/02 ,  G11B5/33

    CPC分类号： G11B5/3116 ,  G11B5/112 ,  G11B5/1278 ,  G11B5/3146 ,  G11B5/315 ,  G11B5/3163

    摘要： According to one embodiment, a perpendicular magnetic recording head includes a main magnetic pole having a trailing side and two lateral sides, a magnetic shield near the trailing side and both lateral sides of the main magnetic pole, the magnetic shield comprising: a first soft magnetic film with a relatively high saturation flux density positioned facing depthwise from a floating surface side thereof, a second soft magnetic film with a relatively low saturation flux density, and a first non-magnetic film. The head also includes a non-magnetic film interposed between the magnetic shield and the main magnetic pole, a first magnetic film magnetically coupled to the magnetic shield and the main magnetic pole on a side opposite a floating surface side thereof, and a coil surrounding a magnetic circuit, the magnetic circuit comprising the main magnetic pole and the first magnetic film. Other systems and methods are also described.

    摘要翻译： 根据一个实施例，垂直磁记录头包括具有后侧和两个侧面的主磁极，靠近主磁极的后侧和两侧的磁屏蔽，磁屏蔽包括：第一软磁 具有从其浮动表面侧朝向深度方向定位的相对较高的饱和磁通密度的膜，具有相对低的饱和磁通密度的第二软磁膜和第一非磁性膜。 头部还包括插入在磁屏蔽和主磁极之间的非磁性膜，磁性地耦合到磁屏蔽的第一磁性膜和与其浮动表面侧相对的一侧的主磁极，以及围绕 所述磁路包括所述主磁极和所述第一磁性膜。 还描述了其它系统和方法。

    PERPENDICULAR MAGNETIC RECORDING HEAD
    9.
    发明申请
    PERPENDICULAR MAGNETIC RECORDING HEAD 有权
    全能磁记录头

    公开(公告)号：US20100157476A1

    公开(公告)日：2010-06-24

    申请号：US12638911

    申请日：2009-12-15

    申请人： Kazue Kudo ,  Hiromi Shiina ,  Yohji Maruyama ,  Tetsuya Okai ,  Gen Oikawa ,  Shouji Tokutake

    发明人： Kazue Kudo ,  Hiromi Shiina ,  Yohji Maruyama ,  Tetsuya Okai ,  Gen Oikawa ,  Shouji Tokutake

    IPC分类号： G11B5/147

    CPC分类号： G11B5/1278 ,  G11B5/3116

    摘要： A perpendicular magnetic recording head according to one embodiment includes a main pole; first magnetic films arranged on both sides of the main pole in a track width direction via nonmagnetic films; and a second magnetic film arranged on a trailing side of the main pole via a nonmagnetic film; wherein the depths of the first magnetic films from an air bearing surface are smaller than the depth of the second magnetic film from the air bearing surface at least at a periphery of the main pole. A perpendicular magnetic recording head according to another embodiment includes a main pole; first magnetic films arranged on both sides of the main pole in a track width direction via nonmagnetic films; and a second magnetic film arranged on a trailing side of the main pole via a nonmagnetic film; wherein the main pole and the first magnetic films have respective tapered portions whose thicknesses become larger toward the side opposite to an air bearing surface, and the tapered portions are in contact with the second magnetic film. Additional embodiments are also presented.

    摘要翻译： 根据一个实施例的垂直磁记录头包括主极; 通过非磁性膜在磁道宽度方向上布置在主极两侧的第一磁膜; 以及通过非磁性膜布置在所述主极的后侧的第二磁性膜; 其中来自空气支承表面的第一磁性膜的深度至少在主极的周边处小于来自空气支承表面的第二磁性膜的深度。 根据另一实施例的垂直磁记录头包括主极; 通过非磁性膜在磁道宽度方向上布置在主极两侧的第一磁膜; 以及通过非磁性膜布置在所述主极的后侧的第二磁性膜; 其中，所述主极和所述第一磁性膜具有各自的锥形部分，所述锥形部分的厚度朝着与空气支承表面相对的一侧变大，并且所述锥形部分与所述第二磁性膜接触。 还提供了另外的实施例。