Patent ID: 7875469
Filing Date: 2011-01-25
Classification: H01J

Abstract:
1. A process for fabricating an electron source, consisting essentially of: (a) covering at least one end of a conductive rod with a first insulating layer, wherein at least one end of the conductive rod further comprises a base and a side wall, (b) covering at least a portion of the first insulating layer with a layer of a field emitter material to form a field emitter layer, (c) covering at least a portion of the field emitter layer with a second insulating layer, (d) covering at least one end of the conductive rod with a layer of a protective material, wherein the protective material is in contact with the second insulating layer, (e) removing the first insulating layer and the field emitter layer from the base of the conductive rod to form a conductive rod having an exposed base and a side wall that is layered in the proximity of the exposed base, (f) removing a portion of the first insulating layer so that the first insulating layer is recessed with respect to the exposed base, and (g) removing at least a portion of the layer of the protective material, wherein step (g) is performed after step (e) and before step (f).