NANOSCALE CONDUCTOR ASSEMBLY, MANUFACTURE THEREOF, FIELD EMISSION DEVICE, MICROWAVE VACUUM TUBE AMPLIFIER AND DISPLAY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a field emission device utilizing the electron emission characteristics of a nano-conductor. SOLUTION: This field emission device deposits nano-conductors on a board 11 generally in the form of an aggregate 30 of wires or fibers, which do not have definite directions and a high aspect ratio in an entangled form. The aggregate 30 in the entangled form is exposed to an electric field vertically applied to the surface of a film during field emission. A loose nano-conductor end 10 in the structure tends to rise and align itself along a power line, so that the nano-conductor end 10 exposed to the electric field and aligned can be provided. Because of the indefinite and entangled nature of the aggregate 30, its density is adequately low and conforms to a criterion of d/h>0.1. In order to produce an aligned nanotube ends having an equal height, the emission characteristic is optimized by trimming the end parts as desired by the use of a high-temperature blade or spacer or by the use of a laser beam.