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    Magnetic recording and reproducing head having a flat surface with round front ridge
    2.
    发明授权
    Magnetic recording and reproducing head having a flat surface with round front ridge 失效
    具有圆形前缘的平坦表面的磁记录和再现头

    公开(公告)号：US5416656A

    公开(公告)日：1995-05-16

    申请号：US801626

    申请日：1991-12-04

    申请人： Kazumasa Fukuda ,  Monjiro Momoi ,  Takamitsu Tsuna ,  Mikio Matsuzaki

    发明人： Kazumasa Fukuda ,  Monjiro Momoi ,  Takamitsu Tsuna ,  Mikio Matsuzaki

    IPC分类号： G11B5/82 ,  G11B5/012 ,  G11B5/02 ,  G11B5/127 ,  G11B5/187 ,  G11B5/60 ,  G11B19/20 ,  G11B21/21

    CPC分类号： G11B5/012 ,  G11B19/20 ,  G11B5/6005

    摘要： A magnetic recording and reproducing apparatus having a magnetic disk, a magnetic head and a magnetic head supporting device. The surface roughness R.sub.max of the magnetic disk is at most 10 nm, and the magnetic head has a slider on which reading and writing elements are mounted. The slider is of a generally rectangular prism shape with the entire area of a medium opposing surface which opposes the magnetic disk being flat. The surface area of the medium opposing surface is 2 mm.sup.2 or less. The apparatus has a first relative speed at which the frictional coefficient between the magnetic disk and the magnetic head is changed from a high value to a low value when the speed increases, and a second relative speed at which the frictional coefficient is changed from a low value to a high value when the speed decreases. A ridge portion between the front surface and the medium opposing surface has a round corner, wherein the length of the round corner in the direction of the medium opposing surface is larger than the length of the round corner in the direction of the front surface.

    摘要翻译： 具有磁盘，磁头和磁头支撑装置的磁记录和重放装置。 磁盘的表面粗糙度Rmax为10nm以下，磁头具有安装有读取和写入元件的滑块。 滑块是大致矩形的棱镜形状，其中与磁盘相对的介质相对表面的整个区域是平坦的。 介质相对表面的表面积为2mm 2以下。 该装置具有第一相对速度，在该速度增加时，磁盘和磁头之间的摩擦系数从高值变为低值，摩擦系数从低的角度变化的第二相对速度 当速度降低时，值变为高值。 前表面和介质相对表面之间的脊部具有圆角，其中圆形在介质相对表面方向上的长度大于前表面方向上圆角的长度。

    Magnetic recording and reproducing apparatus and a magnetic head used for the apparatus
    6.
    发明授权
    Magnetic recording and reproducing apparatus and a magnetic head used for the apparatus 失效
    用于该装置的磁记录和再现装置和磁头

    公开(公告)号：US4939604A

    公开(公告)日：1990-07-03

    申请号：US327699

    申请日：1989-03-23

    申请人： Kazumasa Fukuda ,  Masanori Sakai ,  Joichiro Ezaki ,  Mikio Matsuzaki

    发明人： Kazumasa Fukuda ,  Masanori Sakai ,  Joichiro Ezaki ,  Mikio Matsuzaki

    IPC分类号： G11B5/00 ,  G11B5/73 ,  G11B5/82

    CPC分类号： G11B5/7315 ,  G11B5/00 ,  G11B5/82

    摘要： A magnetic head comprises a slider which holds recording/writing elements at its medium opposing surface constituting a lifting force generating part and the surface area of the medium opposing surface is at most 2 mm.sup.2.A magnetic recording and reproducing apparatus has such magnetic head which is disposed on a magnetic disk having a magnetic recording layer formed on a rigid substrate while the disk is rotated at a high speed so that magnetic recording and reproducing are conducted between the magnetic head and the magnetic disk, wherein the surface roughness R.sub.max of the magnetic disk is at most 100 .ANG..

    摘要翻译： 磁头包括在构成提升力产生部件的介质相对表面处保持记录/写入元件的滑块，并且介质相对表面的表面积至多为2mm 2。 磁记录和再现装置具有这样的磁头，该磁头设置在具有形成在刚性基板上的磁记录层的磁盘上，同时盘以高速旋转，从而在磁头和磁头之间进行磁记录和再现 磁盘，其中磁盘的表面粗糙度Rmax为至多100安培。

    Method of maintaining a constant flying height of a magnetic head and a magnetic disk drive utilized therefor
    7.
    发明授权
    Method of maintaining a constant flying height of a magnetic head and a magnetic disk drive utilized therefor 失效
    保持磁头恒定飞行高度的方法和用于此的磁盘驱动器

    公开(公告)号：US06680820B2

    公开(公告)日：2004-01-20

    申请号：US10158914

    申请日：2002-06-03

    申请人： Mikio Matsuzaki ,  Kazumasa Fukuda ,  Takamitsu Tsuna

    发明人： Mikio Matsuzaki ,  Kazumasa Fukuda ,  Takamitsu Tsuna

    IPC分类号： G11B560

    CPC分类号： G11B5/6005

    摘要： A method of maintaining a constant flying height of a magnetic head: adapted to maintain a flying height of a magnetic head on a magnetic disk substantially constant irrespective of a change of a skew angle, utilizing a device comprising a magnetic disk, a positioning device, a head supporting device and a magnetic head; said positioning device supporting one end of said head supporting device and rotating the head supporting device on a first plane placed on a second plane of said magnetic disk within a predetermined skew angle range; the head supporting device supporting said magnetic head at the other end thereof; the magnetic head being attached with reading/writing elements at an air discharge end of a slider having flying planes on a side of a third plane thereof opposing the magnetic disk; a thickness of said slider from each of the flying planes to an opposite surface on the reverse side thereof being 0.65 mm or less; a length in a first direction of air discharge thereof being 3 mm or less, and a width in a second direction orthogonal to the first direction of air discharge thereof being 2.5 mm or less; wherein a change of the flying height of the magnetic head on the magnetic disk is 0.02 &mgr;m or less, when the skew angle is changed in a range of −20 to 20 degree.

    摘要翻译： 一种保持磁头恒定飞行高度的方法：适于使磁头在磁盘上的飞行高度基本上恒定，而与斜角的变化无关，利用包括磁盘，定位装置， 头部支撑装置和磁头; 所述定位装置支撑所述头部支撑装置的一端并将头部支撑装置旋转在预定的倾斜角度范围内的位于所述磁盘的第二平面上的第一平面上; 头支撑装置在其另一端支撑所述磁头; 所述磁头在与所述磁盘相对的第三平面的一侧具有飞平面的滑块的排气端处附接有读/写元件; 所述滑块从每个飞行平面到其相反侧的相对表面的厚度为0.65mm以下; 空气排出的第一方向的长度为3mm以下，与第一空气排出方向正交的第二方向的宽度为2.5mm以下; 其中，当所述倾斜角度在-20至20度的范围内变化时，所述磁盘上的磁头的飞行高度的变化为0.02μm或更小。

    Thin film magnetic head and magnetic recording and reproducing apparatus
    8.
    发明授权
    Thin film magnetic head and magnetic recording and reproducing apparatus 有权
    薄膜磁头和磁记录和重放装置

    公开(公告)号：US5991110A

    公开(公告)日：1999-11-23

    申请号：US159562

    申请日：1998-09-24

    申请人： Masanori Sakai ,  Makoto Yoshida ,  Kazumasa Fukuda ,  Mikio Matsuzaki

    发明人： Masanori Sakai ,  Makoto Yoshida ,  Kazumasa Fukuda ,  Mikio Matsuzaki

    IPC分类号： G11B5/31 ,  G11B5/09 ,  G11B5/187 ,  G11B5/48 ,  G11B5/60 ,  G11B5/035

    CPC分类号： G11B5/09 ,  G11B5/1872 ,  G11B5/3106 ,  G11B5/3116 ,  G11B5/4886 ,  G11B5/6005

    摘要： In the thin film magnetic transducer element, the front end portions of the upper pole piece and the lower pole piece are partially removed in such a manner that they align non parallel to the gap film on the opposite sides of the gap film. The condition .DELTA.P1>.DELTA.P2 is satisfied when the difference between the maximum pole length P1max and the minimum pole length P1min of the lower pole piece is .DELTA.P1 and the difference between the maximum pole length P2max and the minimum pole length P2min of the upper pole piece is .DELTA.P2. The sub pulse is reduced and so the partial response method can be employed.

    摘要翻译： 在薄膜磁换能器元件中，上极片和下极片的前端部分被部分地移除，使得它们在间隙膜的相对侧上与间隙膜不平行地对准。 当下极点的最大极长度P1max和最小极长度P1min之间的差为DELTA P1，并且上极的最大极长度P2max与最小极长度P2min之间的差值满足条件DELTA P1> DELTA P2 极片是DELTA P2。 子脉冲减少，因此可以采用部分响应方法。

    Thin-film magnetic head for perpendicular magnetic recording and manufacturing method of thin-film magnetic head
    10.
    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。