(19)
(11) EP 0 278 405 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
16.05.1990 Bulletin 1990/20

(43) Date of publication A2:
17.08.1988 Bulletin 1988/33

(21) Application number: 88101626.5

(22) Date of filing: 04.02.1988
(51) International Patent Classification (IPC)4: H01J 1/30, H01J 3/02
(84) Designated Contracting States:
DE FR GB IT NL

(30) Priority: 06.02.1987 JP 24872/87
06.02.1987 JP 24873/87
23.02.1987 JP 38075/87
23.02.1987 JP 38076/87
04.03.1987 JP 47816/87
06.03.1987 JP 50344/87
09.03.1987 JP 52113/87
24.03.1987 JP 67892/87
26.03.1987 JP 70467/87
27.03.1987 JP 73601/87

(60) Divisional application:
96100917.2 / 0713241

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

(72) Inventors:
  • Okunuki, Masahiko
    Nishi Tama-gun Tokyo (JP)
  • Suzuki, Akira
    Yokohama-shi Kanagawa-ken (JP)
  • Shimoda, Isamu
    Zama-shi Kanagawa-ken (JP)
  • Kaneko, Tetsuya
    Yokohama-shi Kanagawa-ken (JP)
  • Tsukamoto, Takeo
    Atsugi-shi Kanagawa-ken (JP)
  • Takeda, Toshihiko
    Setagaya-ku Tokyo (JP)
  • Yonehara, Takao
    Atsugi-shi Kanagawa-ken (JP)
  • Ichikawa, Takeshi
    Sendai-shi Miyagi-ken (JP)

(74) Representative: Tiedtke, Harro, Dipl.-Ing. et al
Patentanwaltsbüro Tiedtke-Bühling-Kinne & Partner Bavariaring 4
80336 München
80336 München (DE)


(56) References cited: : 
   
       


    (54) Electron emission element and method of manufacturing the same


    (57) A multi type electron emission element comprises a plurality of electrodes formed on a deposition surface of an insulating material and each having a conical portion of a single crystal, an insulating layer formed on the deposition surface and having openings respectively centered on the conical portions, and a deriving electrodes, part of which is formed near at least the conical portions, the deriving electrode being formed on the insulating layer.







    Search report