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45 条记录 (耗时 0.026 秒)

    Thin film magnetic head with interlayers of multi-layer poles widening to a constant width portion at a receded distance
    1.
    发明授权
    Thin film magnetic head with interlayers of multi-layer poles widening to a constant width portion at a receded distance 失效
    具有多层极的夹层的薄膜磁头在后退距离处变宽到恒定宽度部分

    公开(公告)号：US06487041B2

    公开(公告)日：2002-11-26

    申请号：US09818842

    申请日：2001-03-28

    申请人： Noboru Yamanaka ,  Kazumasa Fukuda ,  Yuzuru Iwai

    发明人： Noboru Yamanaka ,  Kazumasa Fukuda ,  Yuzuru Iwai

    IPC分类号： G11B531

    CPC分类号： G11B5/3967 ,  G11B5/3116 ,  G11B5/312

    摘要： A gap film of a write element is provided between a first pole portion and a second pole portion. The second pole portion includes a third magnetic film and a fourth magnetic film. The third magnetic film is provided adjacent to the gap film and the fourth magnetic film is provided adjacent to the third magnetic film. The surface of the fourth magnetic film facing opposite the medium includes a first side adjacent to the third magnetic film and second sides extending outward from the first side. The second sides each incline toward the opposite side from the third magnetic film at an angle of less than 90° relative to an extended line of the first side to eliminate recording bleed occurring due to leaked magnetic field.

    摘要翻译： 写元件的间隙膜设置在第一极部分和第二极部分之间。 第二极部包括第三磁性膜和第四磁性膜。 第三磁性膜被设置成与间隙膜相邻，并且第四磁性膜设置成与第三磁性膜相邻。 第四磁性膜的与介质相对的表面包括与第三磁性膜相邻的第一侧和从第一侧向外延伸的第二侧。 第二侧各自相对于第一侧的延长线以相对于第三磁性膜的相反侧倾斜90度以消除由于泄漏的磁场引起的记录渗漏。

    Thin film magnetic head with widening outer layer of multi-layer pole
    2.
    发明授权
    Thin film magnetic head with widening outer layer of multi-layer pole 有权
    薄膜磁头，多层极扩展外层

    公开(公告)号：US06252748B1

    公开(公告)日：2001-06-26

    申请号：US09169983

    申请日：1998-10-13

    申请人： Noboru Yamanaka ,  Kazumasa Fukuda ,  Yuzuru Iwai

    发明人： Noboru Yamanaka ,  Kazumasa Fukuda ,  Yuzuru Iwai

    IPC分类号： G11B539

    CPC分类号： G11B5/3967 ,  G11B5/3116 ,  G11B5/312

    摘要： A gap film of a write element is provided between a first pole portion and a second pole portion. The second pole portion includes a third magnetic film and a fourth magnetic film. The third magnetic film is provided adjacent to the gap film and the fourth magnetic film is provided adjacent to the third magnetic film. The surface of the fourth magnetic film facing opposite the medium includes a first side adjacent to the third magnetic film and a second sides extending outward from the first side. The second sides each inclines toward the opposite side from the third magnetic film at an angle of less than 90° relative to an extended line of the first side to eliminate recording bleed occurring due to leaked magnetic field.

    摘要翻译： 写元件的间隙膜设置在第一极部分和第二极部分之间。 第二极部包括第三磁性膜和第四磁性膜。 第三磁性膜被设置成与间隙膜相邻，并且第四磁性膜设置成与第三磁性膜相邻。 第四磁性膜的与介质相对的表面包括与第三磁性膜相邻的第一侧和从第一侧向外延伸的第二侧。 第二面各自相对于第一侧的延长线以相对于第三磁性膜的相反侧倾斜90度以消除由于泄漏的磁场而产生的记录渗漏。

    Thin film magnetic head
    3.
    发明授权
    Thin film magnetic head 有权
    薄膜磁头

    公开(公告)号：US6144533A

    公开(公告)日：2000-11-07

    申请号：US215301

    申请日：1998-12-18

    申请人： Kazumasa Fukuda ,  Noboru Yamanaka ,  Yuzuru Iwai

    发明人： Kazumasa Fukuda ,  Noboru Yamanaka ,  Yuzuru Iwai

    IPC分类号： G11B5/09 ,  G11B5/31 ,  G11B5/39 ,  G11B5/127

    CPC分类号： G11B5/3967 ,  G11B5/31 ,  G11B5/3116 ,  G11B5/313 ,  G11B5/09

    摘要： The present invention relates to a thin film magnetic head that achieves low NLTS and demonstrates outstanding O/W characteristics in a high frequency range. A first magnetic film and a second magnetic film face opposite each other over a gap film at a side where a surface facing opposite the medium is present. A first yoke and a second yoke, which extend rearward on the opposite side from the surface facing opposite the medium, are linked to each other at a rear linking portion. A coil film, which is supported by an insulating film, is provided in a coil around the rear linking portion. N/YL.gtoreq.0.2 (turns/.mu.m) is satisfied, with YL (.mu.m) representing the distance from the surface facing opposite the medium to the rear linking portion and N (turns) representing the number of turns of the coil film.

    摘要翻译： 薄膜磁头技术领域本发明涉及一种实现低NLTS并在高频范围内表现出优异的O / W特性的薄膜磁头。 第一磁性膜和第二磁性膜表面在与存在介质相反的一侧的间隙膜上彼此相对。 在与相对介质相对的表面的相反侧向后延伸的第一轭和第二轭在后连接部处彼此连接。 由绝缘膜支撑的线圈膜围绕后连接部设置在线圈中。 N / YL> / = 0.2（匝/μm），其中YL（μm）表示与介质相对于后连接部分的表面的距离，N（匝数）表示线圈匝数 电影。

    Thin-film magnetic head for perpendicular magnetic recording and manufacturing method of thin-film magnetic head
    4.
    发明授权
    Thin-film magnetic head for perpendicular magnetic recording and manufacturing method of thin-film magnetic head 有权
    用于垂直磁记录的薄膜磁头和薄膜磁头的制造方法

    公开(公告)号：US07443633B2

    公开(公告)日：2008-10-28

    申请号：US11300277

    申请日：2005-12-15

    申请人： Katsumichi Tagami ,  Tatsuya Harada ,  Hiroki Matsukuma ,  Tetsuya Roppongi ,  Susumu Aoki ,  Kazumasa Fukuda ,  Naoto Matono

    发明人： Katsumichi Tagami ,  Tatsuya Harada ,  Hiroki Matsukuma ,  Tetsuya Roppongi ,  Susumu Aoki ,  Kazumasa Fukuda ,  Naoto Matono

    IPC分类号： G11B5/127

    CPC分类号： G11B5/3116 ,  G11B5/1278 ,  G11B5/1872

    摘要： A thin-film magnetic head with which an error rate is decreased due to a reduction of a jitter without significant decrease in write field, is provided. The head comprises at least one inductive write head element comprising: a main magnetic pole layer having an inner saturation magnetic flux density varying from both side end surfaces in a track-width direction and a leading end surface, toward a center portion in the track-width direction of a trailing end surface; an auxiliary magnetic pole layer; and at least one coil layer, a curvature width WC of a contour line of a write field adjacent to a trailing edge on an ABS side of the main magnetic pole layer satisfying the following expression: −0.15*WT≦WC

    摘要翻译： 提供了一种薄膜磁头，其由于抖动的减小而不会在写入场中显着降低而误差率降低。 头包括至少一个感应写头元件，包括：主磁极层，具有从轨道宽度方向和前端表面的两个侧端面朝着轨道宽度方向的中心部分变化的内部饱和磁通密度， 后端面的宽度方向; 辅助磁极层; 以及至少一个线圈层，与主磁极层的ABS侧的后缘相邻的写入场的轮廓线的曲率宽度W C C满足以下表达式：-0.15 * 其中W T是轨道宽度，W C的单位和 W N是纳米。

    Magnetic disk recording and reproducing apparatus
    6.
    发明授权
    Magnetic disk recording and reproducing apparatus 失效
    磁盘记录和再现装置

    公开(公告)号：US4918556A

    公开(公告)日：1990-04-17

    申请号：US233129

    申请日：1988-08-17

    申请人： Joichiro Ezaki ,  Kazumasa Fukuda ,  Masanori Sakai

    发明人： Joichiro Ezaki ,  Kazumasa Fukuda ,  Masanori Sakai

    IPC分类号： G11B5/02 ,  G11B5/012 ,  G11B5/60 ,  G11B5/62 ,  G11B5/64 ,  G11B5/65 ,  G11B5/73 ,  G11B5/82

    CPC分类号： G11B5/6005 ,  G11B5/012 ,  G11B5/82

    摘要： A magnetic recording and reproducing apparatus of a type wherein a magnetic disk having a magnetic recording layer formed on a rigid substrate is rotatable at a high speed and a magnetic head is disposed on the surface of the disk so that magnetic recording and reproduction are conducted by the head while rotating the disk at a high speed, wherein the surface roughness R.sub.max of the magnetic disk is adjusted at a level of at most 100 .ANG., and the flying height of the magnetic head at the initiation of flying is adjusted at a level within a range of from 0.01 to 0.04 .mu.m.

    摘要翻译： 一种磁记录和再现装置，其中具有形成在刚性基板上的磁记录层的磁盘可高速旋转并且磁头设置在盘的表面上，使得磁记录和再现由 在高速旋转磁盘的同时，其中磁盘的表面粗糙度Rmax被调节到至多100安培的水平，并且在开始飞行时磁头的飞行高度被调整到 范围为0.01〜0.04μm。