利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

19 条记录 (耗时 0.033 秒)

    Manufacturing method for magnetic head
    2.
    发明授权
    Manufacturing method for magnetic head 失效
    磁头制造方法

    公开(公告)号：US5867887A

    公开(公告)日：1999-02-09

    申请号：US745304

    申请日：1996-11-12

    申请人： Seiji Kumagai ,  Masatoshi Hayakawa ,  Yoshito Ikeda ,  Junichi Honda

    发明人： Seiji Kumagai ,  Masatoshi Hayakawa ,  Yoshito Ikeda ,  Junichi Honda

    IPC分类号： G11B5/127 ,  G11B5/133 ,  G11B5/187 ,  G11B5/193 ,  G11B5/23 ,  G11B5/42

    CPC分类号： G11B5/1335 ,  G11B5/1878 ,  G11B5/193 ,  Y10T29/49034 ,  Y10T29/49057

    摘要： A method of manufacturing a magnetic head by bonding a pair of magnetic cores to each other, wherein a residual stress in the magnetic cores upon bonding them together is controlled so that a permeability of the magnetic cores in the vicinity of a magnetic recording medium sliding surface of the magnetic cores may become maximum. Accordingly, the residual stress in the magnetic cores is controlled so that the permeability of the magnetic cores may surely become maximum after forming the magnetic head, thereby ensuring a superior reproduction efficiency of the magnetic head.

    摘要翻译： 通过将一对磁芯彼此结合来制造磁头的方法，其中磁芯在将它们结合在一起时的残余应力被控制，使得磁芯在磁记录介质滑动表面附近的磁导率 的磁芯可能会变得最大。 因此，控制磁芯中的残余应力，使得在形成磁头之后磁芯的磁导率可以确定地变得最大，从而确保磁头的优异的再现效率。

    Magnetic tunnel device, method of manufacture thereof, and magnetic head
    3.
    发明授权
    Magnetic tunnel device, method of manufacture thereof, and magnetic head 有权
    磁隧道装置，其制造方法和磁头

    公开(公告)号：US06452892B1

    公开(公告)日：2002-09-17

    申请号：US09486140

    申请日：2000-05-01

    申请人： Seiji Kumagai ,  Junichi Honda ,  Yoshito Ikeda

    发明人： Seiji Kumagai ,  Junichi Honda ,  Yoshito Ikeda

    IPC分类号： G11B700

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3903 ,  G11B5/3909 ,  G11B2005/3996 ,  G11C11/16 ,  H01F10/3254 ,  H01L43/08

    摘要： First and second magnetic layers are laminated though a tunnel barrier layer, wherein a region is formed in which change in a magnetic resistance ratio with respect to change in a voltage applied in such a manner that the second magnetic layer has a lower potential as compared with the potential of the first magnetic layer is smaller than change in a magnetic resistance ratio with respect to change in a voltage applied in such a manner that the second magnetic layer has a higher potential as compared with the potential of the first magnetic layer. Voltage is applied to the magnetic tunnel device in such a manner that the potential of the second magnetic layer is lower than that of the first magnetic layer so that dependency of the magnetic resistance ratio on the voltage is reduced. Thus, a stable tunnel current flows.

    摘要翻译： 第一和第二磁性层通过隧道势垒层层叠，其中形成一个区域，其中以相对于第二磁性层具有较低电位的方式施加电压的变化的磁阻比的变化， 与第一磁性层的电位相比，第一磁性层的电位相对于施加的电压的变化的磁阻比的变化小于第二磁性层具有较高的电位。 以使第二磁性层的电位低于第一磁性层的电位的方式将电压施加到磁隧道器件，使得磁阻比对电压的依赖性降低。 因此，稳定的隧道电流流动。

    Rotary magnetic head apparatus with circuitry for driving head and circuitry for transmitting output signals in noncontact fashion disposed on rotary drums
    4.
    发明授权
    Rotary magnetic head apparatus with circuitry for driving head and circuitry for transmitting output signals in noncontact fashion disposed on rotary drums 失效
    具有用于驱动磁头的电路的旋转磁头装置和用于以非接触方式传送设置在旋转磁鼓上的输出信号的电路

    公开(公告)号：US5737154A

    公开(公告)日：1998-04-07

    申请号：US666652

    申请日：1996-06-18

    申请人： Seiji Kumagai ,  Masatoshi Hayakawa ,  Hiroshi Morita ,  Norikatsu Fujisawa ,  Junichi Honda ,  Yuji Nakano

    发明人： Seiji Kumagai ,  Masatoshi Hayakawa ,  Hiroshi Morita ,  Norikatsu Fujisawa ,  Junichi Honda ,  Yuji Nakano

    IPC分类号： G11B5/00 ,  G11B5/008 ,  G11B5/02 ,  G11B5/39 ,  G11B5/53 ,  G11B15/12 ,  G11B33/12 ,  G11B5/52

    CPC分类号： G11B33/121 ,  G11B15/125 ,  G11B33/122 ,  G11B5/0086 ,  G11B5/53 ,  G11B2005/0016 ,  G11B5/39

    摘要： A rotary magnetic head apparatus is provided which is capable of reliably supplying DC power for driving to an active-type reproducing head provided within a rotary drum and which is capable of taking the reproductive output signal of the active-type head to the outside of the drum. The rotary magnetic head apparatus includes a fixed drum, a rotary drum which is rotatable with respect to the fixed drum, an active-type reproducing head, disposed on the rotary drum, for reproducing information from a magnetic tape, a constant-current circuit, disposed on the rotary drum, for supplying a constant current for driving the head to the active-type reproducing head, a noncontact signal transmission device for taking the reproductive output signal which is output when the active-type reproducing head reproduces information from the magnetic tape to the outside of the rotary drum, and a sliding-type contact device for supplying external DC power to the constant-current circuit.

    摘要翻译： 本发明提供一种旋转磁头装置，其能够可靠地将驱动用的直流电力提供给设置在旋转磁鼓内的有源型重放磁头，并且能够将主动型磁头的生殖输出信号作用于 鼓。 旋转磁头装置包括固定鼓，相对于固定滚筒可旋转的旋转滚筒，设置在旋转滚筒上的主动型再现头，用于从磁带再现信息，恒流电路， 设置在旋转磁鼓上，用于向主动式再现头提供用于驱动磁头的恒定电流;非接触信号传输装置，用于获取当有源型再现头从磁带再现信息时输出的生殖输出信号 到旋转鼓的外部，以及用于向恒流电路提供外部DC电力的滑动型接触装置。

    Magnetic head
    5.
    发明授权
    Magnetic head 失效
    磁头

    公开(公告)号：US5475551A

    公开(公告)日：1995-12-12

    申请号：US272324

    申请日：1994-07-08

    申请人： Junichi Honda ,  Seiji Kumagai ,  Norikatsu Fujisawa ,  Masatoshi Hayakawa ,  Masahiro Kikkawa ,  Miho Suzuki

    发明人： Junichi Honda ,  Seiji Kumagai ,  Norikatsu Fujisawa ,  Masatoshi Hayakawa ,  Masahiro Kikkawa ,  Miho Suzuki

    IPC分类号： G11B5/133 ,  G11B5/187 ,  G11B5/193 ,  G11B5/23 ,  G11B5/235

    CPC分类号： G11B5/235 ,  G11B5/193

    摘要： A magnetic head has a pair of magnetic core substrates formed of an oxide magnetic material, at least one of the magnetic core substrates having a gap film formed on an abutment surface thereof, the pair of magnetic core substrates being abutted to each other on the gap film as abutment surfaces, having a magnetic gap formed between them. The gap film is formed of platinum, the platinum group, or an alloy consisting mainly of platinum or the platinum group. The pair of magnetic core substrates are bonded to each other to be integrated into one unit by a non-magnetic glass. The magnetic gap has a track width of not greater than 50 .mu.m. The gap film has a thickness of not greater than 150 nm. The magnetic head includes a pair of magnetic core substrates formed of an oxide magnetic material, at least one of the magnetic core substrates having a gap film formed on an abutment surface thereof, the pair of magnetic core substrates being abutted to each other on the gap film as abutment surfaces, having a magnetic gap formed between them. The gap film is selectively formed of Cr or an alloy consisting mainly of Cr, Ti or an alloy consisting mainly of Ti, or Ta.sub.2 O.sub.5 or an oxide consisting mainly of Ta.sub.2 O.sub.5. At least one of the pair of magnetic core substrates has its abutment surface inversely sputtered and then has a gap film formed thereon.

    摘要翻译： 磁头具有由氧化物磁性材料形成的一对磁芯基板，所述磁芯基板中的至少一个在其邻接表面上形成有间隙膜，所述一对磁芯基板在间隙上彼此抵接 膜作为邻接表面，在它们之间形成有磁隙。 间隙膜由铂，铂族基团或主要由铂或铂族组成的合金形成。 一对磁芯基板通过非磁性玻璃彼此结合成一个单元。 磁隙具有不大于50μm的轨道宽度。 间隙膜的厚度不大于150nm。 磁头包括由氧化物磁性材料形成的一对磁芯基板，至少一个磁芯基板在其邻接表面上形成有间隙膜，该一对磁芯基板在间隙上彼此抵接 膜作为邻接表面，在它们之间形成有磁隙。 间隙膜由Cr或主要由Cr，Ti或主要由Ti或Ta2O5组成的合金或主要由Ta 2 O 5组成的氧化物组成的合金选择性地形成。 所述一对磁芯基板中的至少一个具有抵靠面反向溅射，然后在其上形成间隙膜。

    Magnetic tunneling junction device
    9.
    发明授权
    Magnetic tunneling junction device 失效
    磁隧道连接装置

    公开(公告)号：US06365948B1

    公开(公告)日：2002-04-02

    申请号：US08824716

    申请日：1997-03-26

    申请人： Seiji Kumagai ,  Toshihiko Yaoi ,  Yoshito Ikeda

    发明人： Seiji Kumagai ,  Toshihiko Yaoi ,  Yoshito Ikeda

    IPC分类号： H01L2982

    CPC分类号： H01L43/08

    摘要： A magnetic tunneling effect device capable of displaying a so-called magnetic tunneling effect in stability, more specifically, a magnetic tunneling junction device in which a first magnetic metal layer and a second magnetic metal layer are connected together by ferromagnetic tunnel junction via an insulating layer and in which the conductance of the tunnel current is changed by the relative angle of magnetization of these magnetic metal layers. The ferromagnetic tunnel junction has a junction area of not larger than 1 10−9 m2. For reliably controlling the junction area of the ferromagnetic tunnel junction, the insulating layer is formed by a first insulating layer for ferromagnetic tunnel junction and a second insulating layer formed on the first insulating layer for controlling the junction area of the ferromagnetic tunnel junction.

    摘要翻译： 一种能够稳定地显示所谓的磁隧道效应的磁隧道效应装置，更具体地说，是一种磁性隧道接合装置，其中第一磁性金属层和第二磁性金属层通过铁磁隧道结通过绝缘层连接在一起 并且其中隧道电流的电导被这些磁性金属层的相对磁化角改变。 铁磁隧道结的接合面积不大于1 10-9平方米。 为了可靠地控制铁磁隧道结的接合面，绝缘层由用于铁磁隧道结的第一绝缘层和形成在第一绝缘层上的第二绝缘层形成，用于控制铁磁隧道结的结面积。

    Magnetic head
    10.
    发明授权
    Magnetic head 失效
    磁头

    公开(公告)号：US5936815A

    公开(公告)日：1999-08-10

    申请号：US931743

    申请日：1997-09-16

    申请人： Seiji Kumagai ,  Junichi Honda ,  Norikatsu Fujisawa ,  Kyu Kanno

    发明人： Seiji Kumagai ,  Junichi Honda ,  Norikatsu Fujisawa ,  Kyu Kanno

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

    CPC分类号： G11B5/1276 ,  G11B5/1878 ,  G11B5/127 ,  G11B5/1272

    摘要： A thin film type magnetic head that electromagnetic conversion efficiency is improved by making gradually magnetic resistance larger with approaching to a magnetic gap can be provided. There is disclosed a magnetic head including a pair of magnetic core half members having nonmagnetic substrates and magnetic metal films formed on the nonmagnetic substrates and a coil formed at a concave part by a thin film forming process, the pair of magnetic core half members being jointed to each other opposite to each other through a magnetic gap formed between the respective magnetic metal films, the concave part formed on the surface formed by joining at least one of the magnetic metal films and the other magnetic metal film, wherein assistant cores consisting of magnetic materials are joined on the side of the surface by joining a pair of nonmagnetic substrates and the magnetic metal films are formed connected with the assistant cores.

    摘要翻译： 可以提供通过使接近磁隙逐渐变大的磁阻来提高电磁转换效率的薄膜型磁头。 公开了一种磁头，其包括具有非磁性基板的一对磁芯半部件和形成在非磁性基板上的磁性金属膜，以及通过薄膜形成工艺在凹部形成的线圈，所述一对磁芯半体连接 通过形成在各个磁性金属膜之间的磁隙彼此相对，通过接合至少一个磁性金属膜和另一个磁性金属膜形成的表面上形成的凹部，其中由磁性金属膜组成的辅助芯 材料通过连接一对非磁性基底而在表面的一侧接合，并且形成与辅助芯相连接的磁性金属膜。