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30 条记录 (耗时 0.017 秒)

    Rotor assembly, information-recording/-reproducing device using the rotor assembly and method of assembling the rotor assembly
    21.
    发明公开
    Rotor assembly, information-recording/-reproducing device using the rotor assembly and method of assembling the rotor assembly 审中-公开
    转子结构的信息记录/再现与使用该转子结构和工艺的装置，在转子结构的组合物

    公开(公告)号：EP1246182A2

    公开(公告)日：2002-10-02

    申请号：EP02006402.8

    申请日：2002-03-21

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Obata, Shigeo ,  Matsuoka, Kaoru ,  Shinohara, Koichi ,  Ueno, Yoshihiro ,  Inagaki, Tatsuhiko ,  Kuwajima, Hideki ,  Kita, Hiromi

    IPC分类号： G11B19/20

    CPC分类号： G11B19/2009 ,  F16C17/107 ,  F16C2370/12

    摘要： An information-recording/-reproducing device with a rotor assembly having disc-shape recording medium integrates the parts into a unitized single component, those parts are a spindle motor having a hydrodynamic bearing, the disc portion, the rotating axle portion and the bearing portion, and so on. As a result, deviation in the surface and deviation in the rotating axis of a rotating disc are significantly reduced, and the recording density is increased. And overall thickness of a disc device can be reduced. An information-recording/-reproducing device of the present invention comprises a rotor assembly formed of a disc portion having information recording layer provided on the main surface and an axle portion, the disc portion being connected at the center of a surface opposite to the main surface with the rotating axle so that the rotating axis crosses at right angle with the main surface of disc portion at the center of rotation, a bearing for supporting the axle of disc portion freely rotatable, a rotating magnet fixed to a rotor yoke, a stator disposed opposing to the rotating magnet, and a motor for rotating the disc portion with the rotating axis of the axle as the center of rotation. Preferably, the disc portion with the rotating axle portion having a round column shape or a cylindrical shape, further may have a shallow hollow in the central part of the main surface which being a surface opposite to the surface having the rotating axle.

    Method and device for manufacturing magnetic recording medium
    27.
    发明公开
    Method and device for manufacturing magnetic recording medium 失效
    用于磁性记录介质的Herstelling方法和装置。

    公开(公告)号：EP0073041A2

    公开(公告)日：1983-03-02

    申请号：EP82107650.2

    申请日：1982-08-20

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Shinohara, Koichi

    IPC分类号： G11B5/84 ,  H01F41/20

    CPC分类号： G11B5/851 ,  H01F41/20

    摘要： The invention provides a method and a device for mass-producing a magnetic recording medium which has excellent wear and corrosion resistances and uniform quality along the longitudinal and transverse directions of an elongated base body, wherein the elongated base body in a vacuum chamber is fed to continuously deposit a ferromagnetic material thereon, while a gas is sprayed in the vicinity of an incident angle control section of a mask for controlling an angle of incidence of a vapor flow from a vapor source to the elongated base body. The angle of incidence is kept constant to prevent deposition of the vapor material on the incident angle control section, and simultaneously, a uniform oxide film is formed on the ferromagnetic layer using a gas containing at least oxygen.