Method of producing a field emission cathode, a field...

Details Method of producing a field emission cathode, a field... Method of producing a field emission cathode, a field...

H - Electricity

01

J

H01J 1/304 (2006.01) H01J 9/02 (2006.01) H01J 61/067 (2006.01) H01J 63/04 (2006.01)

Patent

CA 2376824

A method of producing a field emission cathode for a light source, and including at least one field emitting body having a field emitting surface, wherein the method includes modifying said emitting surface so as to provide at least one electric field emitting irregularity in each said surface. The method is distinguished by at least one beam of laser light being brought to shape the body and to simultaneously contact the field emitting surface and thereby provide a modifying treatment to the surface of the body. The invention also concerns a field emission cathode so produced and a light source including such a field emission cathode.

L'invention concerne un procédé de production d'une cathode d'émission par effet de champ pour source lumineuse, laquelle cathode comprend au moins un corps d'émission par effet de champ pourvu d'une surface d'émission par effet de champ. Ledit procédé consiste à modifier ladite surface d'émission de manière à créer au moins un irrégularité électrique d'émission par effet de champ au niveau de chacune desdites surfaces. Le procédé est caractérisé en ce qu'on utilise un faisceau laser pour profiler ledit corps, lequel faisceau est simultanément amené au contact de la surface d'émission par effet de champ, ce qui permet de réaliser un traitement de modification à la surface du corps. L'invention concerne également une cathode d'émission par effet de champ produite conformément audit procédé et une source lumineuse comprenant une cathode d'émission par effet de champ de ce type.

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