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    Disk drive unit having multiple disks arranged in a plane
    51.
    发明授权
    Disk drive unit having multiple disks arranged in a plane 失效
    磁盘驱动器单元具有布置在平面中的多个磁盘

    公开(公告)号：US06483660B1

    公开(公告)日：2002-11-19

    申请号：US08992083

    申请日：1997-12-17

    申请人： Kyo Akagi ,  Toshihisa Tsukada ,  Yoshihiro Shiroishi

    发明人： Kyo Akagi ,  Toshihisa Tsukada ,  Yoshihiro Shiroishi

    IPC分类号： G11B554

    CPC分类号： G11B25/043

    摘要： A magnetic disk unit of form factor size with a low power consumption, a short average seek time and a high performance. The unit includes at least two spindles for supporting and rotating magnetic disks. Specifically, two 1.3-inch disks, three 1.0-inch disks or four 0.7-inch disks are arranged in a housing originally intended for a 1.8-inch magnetic disk. The unit further includes a device for writing and reading information while selecting a spindle. The card-type disk unit thus can be reduced in thickness, with a smaller power consumption for starting the disk rotation and further with an improved average seek velocity.

    摘要翻译： 具有功耗低，平均寻道时间短，性能好的外形尺寸的磁盘单元。 该单元包括用于支撑和旋转磁盘的至少两个主轴。 具体来说，两个1.3英寸磁盘，三个1.0英寸磁盘或四个0.7英寸磁盘布置在原来用于1.8英寸磁盘的外壳中。 该单元还包括用于在选择主轴时写入和读取信息的装置。 因此，卡型盘单元的厚度可以减小，具有较小的功率消耗用于启动盘旋转，并且还具有改进的平均寻道速度。

    Magnetic recording and reading device
    52.
    发明授权
    Magnetic recording and reading device 有权
    磁记录读取装置

    公开(公告)号：US06404605B2

    公开(公告)日：2002-06-11

    申请号：US09725253

    申请日：2000-11-29

    申请人： Yoshihiro Shiroishi

    发明人： Yoshihiro Shiroishi

    IPC分类号： G11B5147

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/00 ,  G11B5/09 ,  G11B5/313 ,  G11B5/3909 ,  G11B5/3967 ,  G11B5/484 ,  G11B5/656 ,  G11B5/66 ,  G11B5/7325 ,  G11B2005/0002 ,  G11B2005/0005 ,  G11B2005/3996

    摘要： A magnetic recording and reading device which has a transfer rate of not less than 50 MB/s and which includes a magnetic recording medium having an absolute value of normalized noise coefficient per recording density of not more than 2.5×10−5 (&mgr;Vrms)(inch)(&mgr;m)0.5/(&mgr;Vpp), and a magnetic head which is mounted on an integrated circuit suspension so that a total inductance is reduced to be not more than 65 nH. The magnetic head has a magnetic core which is not more than 35 &mgr;m of length, a part of the magnetic core being formed by a magnetic film having a resistivity exceeding at least 50 &mgr;&OHgr;cm or by a multilayer film consisting of a magnetic film and an insulating film. A fast R/W-IC having a line width of not more than 0.35 &mgr;m is also provided. The magnetic head is provided with a reading element including one of a giant magnetoresistance effect element and a thin film having tunneling-magnetoresistance effect, with an effective track width of not more than 0.9 &mgr;m, and performs the reading of magnetic information at an areal density of not less than 5 Gb/in2.

    摘要翻译： 具有不小于50MB / s的传输速率的磁记录和读取装置，其包括具有不大于2.5×10-5（μVrms）的绝对值的记录密度的绝对值的磁记录介质（英寸） ）（mum）0.5 /（muVpp）和安装在集成电路悬架上的磁头，使得总电感减小到不大于65nH。 磁头具有长度不超过35μm的磁芯，磁芯的一部分由电阻率超过50μΩEGcm的磁性膜形成，或由磁性膜和绝缘体构成的多层膜形成 电影。 还提供了线宽不大于0.35μm的快速R / W-IC。 磁头设置有包括巨磁阻效应元件和具有隧道磁阻效应的薄膜之一的读取元件，有效轨道宽度不大于0.9μm，并且以面密度进行磁信息的读取 不小于5 Gb / in2。

    Magnetic recording and reading device
    53.
    发明授权
    Magnetic recording and reading device 失效
    磁记录读取装置

    公开(公告)号：US06324035B2

    公开(公告)日：2001-11-27

    申请号：US09836481

    申请日：2001-04-18

    申请人： Yoshihiro Shiroishi

    发明人： Yoshihiro Shiroishi

    IPC分类号： G11B531

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/00 ,  G11B5/09 ,  G11B5/313 ,  G11B5/3909 ,  G11B5/3967 ,  G11B5/484 ,  G11B5/656 ,  G11B5/66 ,  G11B5/7325 ,  G11B2005/0002 ,  G11B2005/0005 ,  G11B2005/3996

    摘要： A magnetic recording and reading device having a magnetic head assembly in which a magnetic head is mounted on a suspension, an R/W-IC having a line width of not more than 0.35 &mgr;m and a magnetic disk medium having a magnetic recording layer formed on a substrate. The magnetic head assembly has an inductance of not more than 65 nH and has a magnetic path with a length of not more than 35 &mgr;m, wherein a part of the magnetic path is provided with a magnetic film or a multi-layer film consisting of a magnetic film and a non magnetic layer. The magnetic film and the multi-layer film have a resistivity of more than 50 &mgr;&OHgr;cm.

    摘要翻译： 一种具有磁头组件的磁记录和读取装置，其中磁头安装在悬架上，具有不大于0.35μm的线宽的R / W-IC和形成有磁记录层的磁盘介质 底物。 磁头组件具有不大于65nH的电感并且具有不大于35μm的长度的磁路，其中一部分磁路设置有磁性膜或多层膜，所述多层膜由 磁性膜和非磁性层。 磁性膜和多层膜的电阻率大于50μΩEGcm。

    Perpendicular magnetic recording and reproducing thin film head
    57.
    发明授权
    Perpendicular magnetic recording and reproducing thin film head 失效
    垂直磁记录和再现薄膜头

    公开(公告)号：US4636897A

    公开(公告)日：1987-01-13

    申请号：US539386

    申请日：1983-10-06

    申请人： Hitoshi Nakamura ,  Kasuo Shiiki ,  Isamu Yuito ,  Yoshihiro Shiroishi ,  Hideo Fujiwara ,  Kiminari Shinagawa ,  Akemi Iijima

    发明人： Hitoshi Nakamura ,  Kasuo Shiiki ,  Isamu Yuito ,  Yoshihiro Shiroishi ,  Hideo Fujiwara ,  Kiminari Shinagawa ,  Akemi Iijima

    IPC分类号： G11B5/31 ,  G11B5/127 ,  G11B5/23 ,  G11B5/147 ,  G11B5/187 ,  G11B5/235

    CPC分类号： G11B5/1278

    摘要： A perpendicular magnetic recording and reproducing thin film head of a structure excellent in magnetic characteristics and easy of fabrication, wherein a lower magnetic layer disposed on a flat nonmagnetic substrate is used as a main magnetic pole, a first insulator layer is formed on the main magnetic pole, a conductor for a coil and a second insulator layer are disposed on the first insulator layer, and an upper magnetic layer which lies in contact with the lower magnetic layer through the first insulator layer at one end thereof and directly at the other end thereof and which overlies the second insulator layer in a part thereof other than both the ends is disposed and used as an auxiliary magnetic pole.

    摘要翻译： 磁性特性优良，制造容易的结构的垂直磁记录再生薄膜头，其特征在于，使用设置在平面非磁性基板上的下部磁性层作为主磁极，在主磁体上形成第一绝缘体层 极，用于线圈的导体和第二绝缘体层设置在第一绝缘体层上，并且上磁性层通过第一绝缘体层在其一端直接与下磁性层接触，并且在另一端处 并且在除了两端的部分中的第二绝缘体层之外的位置被布置并用作辅助磁极。

    Thin film magnetic head and fabricating method thereof
    59.
    发明授权
    Thin film magnetic head and fabricating method thereof 失效
    薄膜磁头及其制造方法

    公开(公告)号：US4539616A

    公开(公告)日：1985-09-03

    申请号：US400019

    申请日：1982-07-20

    申请人： Isamu Yuito ,  Kazuo Shiiki ,  Atsushi Saiki ,  Yoshio Homma ,  Noriyuki Kumasaka ,  Yoshihiro Shiroishi ,  Mitsuhiro Kudo

    发明人： Isamu Yuito ,  Kazuo Shiiki ,  Atsushi Saiki ,  Yoshio Homma ,  Noriyuki Kumasaka ,  Yoshihiro Shiroishi ,  Mitsuhiro Kudo

    IPC分类号： G11B5/17 ,  G11B5/31 ,  G11B5/22 ,  G11B5/20

    CPC分类号： G11B5/313 ,  G11B5/17 ,  Y10T29/49064

    摘要： Herein disclosed is a thin film magnetic head which is so constructed that a conductor layer arranged in a non-magnetic insulating layer isolating two magnetic poles and adapted to form a coil of plural turns has a height made larger than the width and gap thereof. A method of fabricating that head includes the step of forming a non-magnetic insulating layer, the step of etching the insulating layer by using a mask layer formed thereover as a mask, the step of depositing a metal for providing a conductor layer, the step of removing the mask layer together with the metal thereover, and the step forming a coating of a non-magnetic insulating layer thereover, thereby to form the conductor layer. The head thus fabricated has its magnetic recording and reproducing characteristics improved.

    摘要翻译： 这里公开了一种薄膜磁头，其结构使得布置在隔离两个磁极并适于形成多个匝的线圈的非磁性绝缘层中的导体层具有比其宽度和间隙大的高度。 制造该头的方法包括形成非磁性绝缘层的步骤，通过使用其上形成的掩模层作为掩模蚀刻绝缘层的步骤，沉积用于提供导体层的金属的步骤，步骤 与金属一起除去掩模层，以及在其上形成非磁性绝缘层的涂层的步骤，从而形成导体层。 如此制造的磁头具有改善的磁记录和再现特性。

    Magnetic head
    60.
    发明授权
    Magnetic head 失效
    磁头

    公开(公告)号：US4450494A

    公开(公告)日：1984-05-22

    申请号：US304612

    申请日：1981-09-22

    申请人： Hideo Fujiwara ,  Mitsuhiro Kudo ,  Teizo Tamura ,  Nobuyuki Sugishita ,  Yoshihiro Shiroishi ,  Takeshi Kimura ,  Kiminari Shinagawa ,  Noriyuki Kumasaka

    发明人： Hideo Fujiwara ,  Mitsuhiro Kudo ,  Teizo Tamura ,  Nobuyuki Sugishita ,  Yoshihiro Shiroishi ,  Takeshi Kimura ,  Kiminari Shinagawa ,  Noriyuki Kumasaka

    IPC分类号： G11B5/127 ,  G11B5/133 ,  G11B5/187 ,  G11B5/193 ,  G11B5/23 ,  G11B5/245 ,  G11B5/12 ,  G11B5/22

    CPC分类号： G11B5/127 ,  G11B5/133 ,  G11B5/193

    摘要： A magnetic head having a magnetic core formed by facing a pair of magnetic substances through a working gap at a head section confronting a magnetic recording medium is disclosed in which at least one of the magnetic substances has magnetic anisotropy, and an angle .alpha. (in a C-shaped core half) and/or an angle .alpha.' (in an I-shaped core half) between a core surface confronting the magnetic recording medium and a direction having a maximum magnetic permeability in a main magnetic circuit plane of the magnetic substance having magnetic anisotropy is made larger than an orientation angle of the above direction for making minimum the magnetic reluctance of the main magnetic circuit of the magnetic core by .beta. (for .alpha.) and/or .beta.' (for .alpha.') to improve the recording/reproducing characteristic of the magnetic head, where .beta. is given by a formula ##EQU1## is equal to or less than 25.degree., D indicates a depth of the working gap, L* indicates an effective length of an oblique part for forming the working gap, and min [a, b] indicates the smaller of a and b.

    摘要翻译： 公开了一种磁头，其具有通过面对磁记录介质的磁头部分处的工作间隙面对一对磁性物质形成的磁芯，其中至少一个磁性物质具有磁各向异性，并且角度α（在 C形芯部一半）和/或与磁记录介质相对的芯面之间的角度α'（I形磁芯半部）和磁性物质的主磁路平面中具有最大导磁率的方向 使磁各向异性大于上述方向的取向角，以使磁芯的主磁路的磁阻为β（对于α）和/或β'（对于α'）来改善记录/再现的磁阻 磁头的特性，其中β由公式给出等于或小于25°，D表示工作间隙的深度，L *表示斜度的有效长度 t形成工作间隙，min [a，b]表示a和b中较小的一个。