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15 条记录 (耗时 0.011 秒)

    Magnetic transducer using magnetoresistance effect
    2.
    发明公开
    Magnetic transducer using magnetoresistance effect 失效
    磁传感器使用磁阻效应

    公开(公告)号：EP0152000A3

    公开(公告)日：1986-06-18

    申请号：EP85100825

    申请日：1985-01-28

    申请人： HITACHI, LTD.

    发明人： Kamo, Yoshihisa ,  Sato, Naoki ,  Kitada, Masahiro ,  Takeura, Tooru

    IPC分类号： G01R33/06

    CPC分类号： B82Y25/00 ,  G01R33/093 ,  G11B5/3903 ,  G11B5/3932 ,  G11B5/399

    摘要： Disclosed is a magnetic transducer using a magnetoresi- ' stance effect, comprising a magnetoresistive film (1), a hard magnetic film (3) for applying a transverse biasing magnetic field thereto, and a conductive film (2) through which current for applying the transverse biasing magnetic field to the magnetoresistive film (1) flows. The conductive film may be either in electrical contact with or in electrical insulation from the magnetoresistive film. In this magnetic transducer, even when the heights of the respective constituents have changed, the transverse biasing magnetic field to be applied does not change considerably, and an optimum bias field strength is readily attained.

    Magnetic recording-reproducing apparatus and magnetoresistive head for use therewith
    3.
    发明公开
    Magnetic recording-reproducing apparatus and magnetoresistive head for use therewith 失效
    磁记录重现装置及其使用的磁头

    公开(公告)号：EP0372420A3

    公开(公告)日：1992-01-08

    申请号：EP89122218.4

    申请日：1989-12-01

    申请人： HITACHI, LTD.

    发明人： Tanabe, Hideo ,  Kitada, Masahiro ,  Shimizu, Noboru ,  Nakamura, Hitoshi

    IPC分类号： G11B5/39 ,  G11B5/127

    CPC分类号： G11B5/3903 ,  G11B5/09 ,  G11B5/3948 ,  G11B5/3967 ,  G11B5/4886

    摘要： A magnetic recording-reproducing apparatus is disclosed which comprises a recording inductive magnetic head (101), a reproducing magnetoresistive magnetic head (101), a read-write circuit (104) for inputting a signal to the inductive magnetic head and for reproducing the output from the magnetoresistive magnetic head, an interface (107) for inputting/outputting a signal between the read-write circuit and a superior device, and a mechanism (101, 102, 105, 106) for moving the inductive magnetic head, magnetoresistive magnetic head and the magnetic recording medium relative to one another, wherein the information recorded on the recording medium is reproduced with an area recording density of 300 Mb/in² or more.

    Magnetic recording-reproducing apparatus and magnetoresistive head for use therewith
    4.
    发明公开
    Magnetic recording-reproducing apparatus and magnetoresistive head for use therewith 失效
    磁记录和再现装置，和磁阻头在其中使用。

    公开(公告)号：EP0372420A2

    公开(公告)日：1990-06-13

    申请号：EP89122218.4

    申请日：1989-12-01

    申请人： HITACHI, LTD.

    发明人： Tanabe, Hideo ,  Kitada, Masahiro ,  Shimizu, Noboru ,  Nakamura, Hitoshi

    IPC分类号： G11B5/39 ,  G11B5/127

    CPC分类号： G11B5/3903 ,  G11B5/09 ,  G11B5/3948 ,  G11B5/3967 ,  G11B5/4886

    摘要： A magnetic recording-reproducing apparatus is disclosed which comprises a recording inductive magnetic head (101), a reproducing magnetoresistive magnetic head (101), a read-write circuit (104) for inputting a signal to the inductive magnetic head and for reproducing the output from the magnetoresistive magnetic head, an interface (107) for inputting/outputting a signal between the read-write circuit and a superior device, and a mechanism (101, 102, 105, 106) for moving the inductive magnetic head, magnetoresistive magnetic head and the magnetic recording medium relative to one another, wherein the information recorded on the recording medium is reproduced with an area recording density of 300 Mb/in² or more.

    摘要翻译： 一种磁性记录重放装置的盘游离缺失，它包括一个记录用于输入信号到感应磁头和用于再现输出感应磁头（101），再现磁阻磁头（101），一个读 - 写电路（104） 从磁阻磁头，对接口（107），用于输入/输出亭读 - 写电路和优越的装置，以及一个机制（101，102，105，106）之间的信号用于移动感应磁头，磁阻磁头 和相对于彼此，worin记录在记录介质上的信息被以300兆位/的面积记录密度在<2>或多个转载与磁记录介质。

    Magnetic storage apparatus
    6.
    发明公开
    Magnetic storage apparatus 失效
    磁铁配件

    公开(公告)号：EP0678855A1

    公开(公告)日：1995-10-25

    申请号：EP95105865.0

    申请日：1995-04-19

    申请人： HITACHI, LTD.

    发明人： Takano, Hisashi ,  Kitada, Masahiro ,  Suzuki, Mikio

    IPC分类号： G11B5/012 ,  G11B5/016 ,  G11B5/02 ,  G11B5/09

    CPC分类号： G11B5/31 ,  G11B5/012 ,  G11B5/09 ,  G11B5/1272 ,  G11B5/17 ,  G11B5/3109 ,  G11B5/313 ,  G11B5/39 ,  G11B5/3967

    摘要： In a magnetic storage apparatus, the frequency at which data is recorded is selected to be 45 MHz. The thickness, resistivity and relative permeability of the magnetic film which form the magnetic poles (20, 21) of the magnetic head (10) are designed considering the eddy current loss. Also, the relation of µd²/ρ ≦ 500 is satisfied, where d (µm) is the thickness of the magnetic film, ρ (µΩcm) is the resistivity, and µ is the relative permeability in a low-frequency range. Under these conditions, the amount of attenuation of recording magnetic field is reduced to 10% or below, and problems of writing blur and overwrite value variation which occur as the recording frequency changes can be solved. Moreover, the media data rate is 15 megabytes/s, and the areal data-recording density is 80 megabits/cm² or more.

    摘要翻译： 在磁存储装置中，将数据记录的频率选择为45MHz。 考虑到涡流损耗，设计形成磁头（10）的磁极（20,21）的磁性膜的厚度，电阻率和相对磁导率。 此外，满足μd 2 / rho <500的关系，其中d（μm）是磁膜的厚度，rho（μΩEGAcm）是电阻率，μ是相对磁导率 低频范围。 在这些条件下，记录磁场的衰减量降低到10％以下，可以解决写入模糊和记录频率发生变化时的重写值变化的问题。 此外，媒体数据速率为15兆字节/秒，数据记录密度为80兆比特/厘米2以上。