Patent ID: 7785165
Filing Date: 2010-08-31
Classification: B82Y,C01B,H01J

Abstract:
1. A method for manufacturing a field emission electron source, the method comprising the steps of: (a) providing a conductive base having at least one carbon nanotube assembled thereon; and (b) forming a modifying layer on at least a free end of the carbon nanotube, the modifying layer being comprised of a material with a lower work function than that of the carbon nanotube; wherein step (b) comprising the steps of: (b1) forming a film of metal at least on a free end of the carbon nanotube; and (b2) carbonizing the film of metal, thereby forming a modifying layer on the carbon nanotube; wherein step (b2) is performed in a vacuum and is executed by providing a voltage to the carbon nanotube to cause the carbon nanotube to emit electrons for a predetermined time, the emitting of electrons thereby producing a chemical reaction between the carbon nanotube and the film of metal.