X-RAY CATHETER
    242.
    发明公开
    X-RAY CATHETER 失效
    X光导管

    公开(公告)号:EP0847249A4

    公开(公告)日:2004-09-29

    申请号:EP96929018

    申请日:1996-08-22

    Abstract: A catheter for emitting radiation is disclosed, comprising a catheter shaft (104), and an x-ray unit (102) attached to the distal end of the catheter shaft. The x-ray unit comprises an anode (112), and a cathode (110) coupled to an insulator (108) to define a vacuum chamber (106). The cathode is preferably a field emission cathode of graphite or graphite coated with titanium carbide, for example. The anode is preferably tungsten, and the insulator is preferably pyrolytic boron nitride. The x-ray unit is preferably coupled to a voltage source through a coaxial cable. The anode is preferably a heavy metal such as tungsten. The cathode may also be a ferroelectric material. The x-ray unit can have a diameter less than about 4mm, and a length less than about 15 mm. Methods of use of the catheter are also disclosed. The catheter of the present invention can be used to irradiate the site of an angioplasty procedure to prevent restenosis. It can also be used to treat other conditions in any vessel, lumen or cavity of the body.

    Structure of miniature X-ray source
    243.
    发明公开
    Structure of miniature X-ray source 审中-公开
    小型化的X射线源的结构

    公开(公告)号:EP1205217A3

    公开(公告)日:2004-01-02

    申请号:EP01200594.8

    申请日:2001-02-19

    Inventor: Tirén, Jonas

    CPC classification number: A61N5/1001 H01J35/32 H01J2201/304 H01J2235/164

    Abstract: Miniature X-ray source comprising a support structure provided with a throughgoing hole, an anode is arranged at one end and a cathode (8,24) at the other end of the hole, thereby defining a cavity, the anode and cathode are adapted to be energised in order to generate X-ray radiation. The support structure has a cross-sectional shape that is determined such that a desired radiation distribution of the radiation generated by the X-ray source is achieved. Also a method of manufacturing miniature X-ray sources is disclosed.

    SHIELDED FIELD EMISSION DISPLAY
    248.
    发明公开
    SHIELDED FIELD EMISSION DISPLAY 失效
    SHIELDED场发射显示装置

    公开(公告)号:EP0896730A1

    公开(公告)日:1999-02-17

    申请号:EP97923607.0

    申请日:1997-05-05

    Abstract: A field emission display having emitters controlled by an integrated driving circuit. The field emission display includes a charge shield positioned above exposed areas of the substrate to protect driving circuitry integrated into the substrate. The charge shield is a conductive layer within an insulative layer covering the driving circuit. The charge shield is connected to ground or to a low reference potential to bleed away current within the insulative layer, thereby preventing drifting charges from affecting the electrical response of the integrated driving circuit. The charge shield also terminates electric fields within the insulative layer to reduce the effect on the integrated driving circuit of dynamic variations in surface charge. Electrical characteristics of the driving circuit thus remain constant, reducing variations in the current supplied to the emitters, thereby reducing variations in the intensity of light emitted by the display.

    A field emission display
    250.
    发明公开
    A field emission display 失效
    Feldemissionsanzeigevorrichtung

    公开(公告)号:EP0782169A1

    公开(公告)日:1997-07-02

    申请号:EP96309300.0

    申请日:1996-12-19

    CPC classification number: H01J31/123 H01J9/261 H01J2201/304 H01J2329/863

    Abstract: A method for fabricating a field emission display is disclosed. The method includes the steps of arranging a sealing layer (4) between a face plate (2) and a substrate (6), heating the sealing layer until the sealing layer adheres to the face plate and the substrate, and then pulling the face plate away from the sealing layer so that the vacuum is improved. The sealing layer may be constructed from glass and heated with a heating coil (18) made from ni-chrome wire. The elements can be positioned using industrial robots using common manufacturing techniques.

    Abstract translation: 公开了一种制造场致发射显示器的方法。 该方法包括在面板(2)和基板(6)之间布置密封层(4)的步骤,加热密封层直到密封层粘附到面板和基板上,然后拉动面板 远离密封层,从而提高真空度。 密封层可以由玻璃制成,并用由镍铬丝制成的加热线圈(18)加热。 这些元件可以使用工业机器人使用常规的制造技术来定位。

Patent Agency Ranking