Global Patent Index - EP 0890973 B1

EP 0890973 B1 2002-09-11 - Cold cathode with microtips

Title (en)

Cold cathode with microtips

Title (de)

Mikrospritzen-Kaltkathode

Title (fr)

Cathode froide à micropointes

Publication

EP 0890973 B1 (FR)

Application

EP 98401651 A

Priority

FR 9708793 A

Abstract (en)

[origin: EP0890973A1] The micropoint cold cathode construction has micropoints (1) on a substrate base (2) with an upper grid hole (3). The specific construction details are that the micropoint peak is distanced at d=0 from the top surface level, that the radius of curvature of the point is 25 nm and that the radius of the hole (4) in the grid is 1.3 microns.

IPC 1-7 (main, further and additional classification)

H01J 1/30

IPC 8 full level (invention and additional information)

H01J 1/304 (2006.01); H01J 3/02 (2006.01)

CPC (invention and additional information)

H01J 3/022 (2013.01)

Designated contracting state (EPC)

CH DE GB IT LI

EPO simple patent family

EP 0890973 A1 19990113; EP 0890973 B1 20020911; DE 69807797 D1 20021017; DE 69807797 T2 20030528; FR 2766011 A1 19990115; FR 2766011 B1 19990924; JP H1173872 A 19990316; US 6259190 B1 20010710

INPADOC legal status


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