A matrix addressable flat panel display includes a flat cathode operable for emitting electrons to an anode when an electric field is produced across the surface of the flat cathode by two electrodes placed on each side of the flat cathode. The flat cathode may consist of a cermet or amorphic...http://www.google.fr/patents/US5679043?utm_source=gb-gplus-shareBrevet US5679043 - Method of making a field emitter
