(19)
(11) EP 0 329 432 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
05.09.1990 Bulletin 1990/36

(43) Date of publication A2:
23.08.1989 Bulletin 1989/34

(21) Application number: 89301475.3

(22) Date of filing: 16.02.1989
(51) International Patent Classification (IPC)4: H01J 1/30
(84) Designated Contracting States:
DE FR GB NL

(30) Priority: 18.02.1988 JP 33934/88
18.02.1988 JP 33936/88

(71) Applicant: CANON KABUSHIKI KAISHA
Tokyo (JP)

(72) Inventors:
  • Eguchi, Ken
    Yokohama-shi Kanagawa-ken (JP)
  • Kawada, Haruki
    Hodogaya-ku Yokohama-shi Kanagawa-ken (JP)
  • Sakai, Kunihiro
    Isehare-shi Kanagawa-ken (JP)
  • Matsuda, Hiroshi
    Isehara-shi Kanagawa-ken (JP)
  • Takimoto, Kiyoshi
    Kawasaki-shi Kanagawa-ken (JP)
  • Kawade, Hisaaki
    Atsugi-shi Kanagawa-ken (JP)
  • Morikawa, Yuko
    Kawasaki-shi Kanagawa-ken (JP)
  • Yanagisawa, Yoshihiro
    Atsugi-shi Kanagawa-ken (JP)

(74) Representative: Beresford, Keith Denis Lewis et al
BERESFORD & Co. 2-5 Warwick Court High Holborn
London WC1R 5DJ
London WC1R 5DJ (GB)


(56) References cited: : 
   
     
    Remarks:
    The title of the invention has been amended (Guidelines for Examination in the EPO, A-III, 7.3).
     


    (54) Electron emitter


    (57) An electron emitting device, comprising; a first electrode (4) provided on a substrate; a first layer (1) provided on said electrode and capable of undergoing transition from an electrically high resistance state to a low resistance state when irradiated by a radiant ray (L); and a conductive layer (3), an insulating layer (2) and further a second electrode (5), laminated on said first layer, and
    an electron generator, comprising the electron emitting device, means for applying an electric field to said device, and means for irradiating a radiant ray on the device, and also
    a method for driving the electron emitting device are provided.







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