Patent ID: 8102108
Filing Date: 2012-01-24
Classification: B82Y,H01J

Abstract:
1. An emission electron source comprising: a cathode electrode disposed on a substrate, the cathode electrode for providing a source of electrons; an emitter layer disposed over said cathode electrode and formed from a composition of an embedding material and one or a plurality of small cluster of nano-structures embedded therein, the embedding material having a surface above which portion of the nano-structures protrude for emitting electrons; an insulator disposed over the emitter layer, the insulator having one or a plurality of apertures, each exposing at least the ends of the small cluster of nano-structures in the emitter layer; and a gate electrode disposed over the insulator and having one or a plurality of apertures, wherein each aperture exposes a small cluster of nano-structures and is concentrically aligned with the small cluster, the gate electrode being operative to control the emission of electrons through the apertures from the exposed nano-structures, wherein the shape of said gate aperture is substantially the same as the shape of the cross contour of the exposed cluster of nano-structures at the gate electrode.