Patent ID: 7914358
Filing Date: 2011-03-29
Classification: H01J

Abstract:
1. A method for manufacturing a field emission electron source, the method comprising the steps of: (a) providing a carbon nanotube (CNT) film comprising of a plurality of CNTs, the CNTs being aligned along a same direction, a first electrode, and a second electrode; (b) fixing the two opposite sides of the CNT film on the first electrode and the second electrode, the CNTs in the CNT film extending from the first electrode to the second electrode; (c) treating the CNT film with an organic solvent to form at least one CNT string; (d) applying a voltage between two opposite ends of the at least one CNT string until the at least one CNT string snaps, thereby obtaining at least one CNT needle, wherein the at least one CNT needle has an end portion and a broken end portion; and (e) securing the at least one CNT needle to a conductive base by attaching the end portion of the at least one CNT needle to the conductive base; and