Global Patent Index - EP 0461990 A1

EP 0461990 A1 19911218 - Micropoint cathode electron source.

Title (en)

Micropoint cathode electron source.

Title (de)

Elektronenquelle mit Mikropunktkathoden.

Title (fr)

Source d'électrons à cathodes émissives à micropointes.

Publication

EP 0461990 A1 19911218 (FR)

Application

EP 91401536 A 19910611

Priority

FR 9007347 A 19900613

Abstract (en)

[origin: JPH04229922A] PURPOSE: To prevent an electric breakdown without increasing the thickness of a resistance coating material in an electron emission source which has a microdot discharge cathode. CONSTITUTION: Since a lattice-like negative electrode is used so that the negative electrode and the related resistance coating material may be arranged in almost the same surface, a breakdown resistance does not depend on the thickness of a resistance coating material 7, but depends on the distance between a cathode conductor 5 and microdots 12. Therefore, an adequate distance is kept between the cathode conductor 5 and microdots 12 to prevent the resistance breakdown, and, meanwhile, the resistance coating material 7 keeps a uniformity effect of an electron emission.

Abstract (fr)

Source d'électrons à cathodes (12) émissives à micropointes possédant des électrodes en forme de treillis ; ces électrodes peuvent être soit les conducteurs cathodiques (5), soit les grilles (10).Application à l'excitation d'écran de visualisation.

IPC 1-7

H01J 1/30

IPC 8 full level

H01J 1/30 (2006.01); H01J 1/304 (2006.01)

CPC (source: EP KR US)

H01J 1/3042 (2013.01 - EP US); H01L 29/40 (2013.01 - KR); H01J 2201/319 (2013.01 - EP US)

Citation (search report)

  • [AD] US 4857161 A 19890815 - BOREL MICHEL [FR], et al
  • [A] PATENT ABSTRACTS OF JAPAN vol. 13, no. 259 (E-773)(3607) 15 Juin 1989 & JP-A-01 54 637 (MATSUSHITA ) 2 Mars 1989

Designated contracting state (EPC)

CH DE GB IT LI NL SE

DOCDB simple family (publication)

EP 0461990 A1 19911218; EP 0461990 B1 19941019; DE 69104653 D1 19941124; DE 69104653 T2 19950504; FI 912802 A0 19910611; FI 912802 A 19911214; FR 2663462 A1 19911220; FR 2663462 B1 19920911; JP 2657984 B2 19970930; JP H04229922 A 19920819; KR 100204327 B1 19990701; KR 920001744 A 19920130; US 5194780 A 19930316

DOCDB simple family (application)

EP 91401536 A 19910611; DE 69104653 T 19910611; FI 912802 A 19910611; FR 9007347 A 19900613; JP 13895991 A 19910611; KR 910009509 A 19910610; US 70368491 A 19910531