Method for fabrication of field emission devices using carbon nanotube film as a cathode
First Claim
Patent Images
1. A method for fabrication of carbon nanotubes film, comprising the steps of:
- (a) Synthesizing catalyst layer consisted of at least one of the transition metals and related alloy, compound, or composite;
(b) Synthesizing carbon nanotubes film on said catalyst layer using hydrocarbon precursor by chemical vapor deposition in the pressure of 10−
4 torr to 1 atm. and temperature of 300-800°
C.
0 Assignments
0 Petitions
Accused Products
Abstract
The present invention relates to field emission deices fabrication using carbon nanotube film as a cathode. The multi-wall carbon nanotubes film possesses low electron field emission and high emission current density, which is deposited by catalytic chemical vapor deposition at low temperature. The carbon nanotubes density can be controlled by tuning of the transition metal catalysts in the seed alloy layer. The film can be deposited onto the substrate uniformly with large area. The present invention is related to the fabrication of cold electron sources, florescent light, vacuum electronic devices, field emission displays and methods of making same.
234 Citations
16 Claims
-
1. A method for fabrication of carbon nanotubes film, comprising the steps of:
-
(a) Synthesizing catalyst layer consisted of at least one of the transition metals and related alloy, compound, or composite;
(b) Synthesizing carbon nanotubes film on said catalyst layer using hydrocarbon precursor by chemical vapor deposition in the pressure of 10−
4 torr to 1 atm. and temperature of 300-800°
C. - View Dependent Claims (2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
3. A field emission devices comprising:
-
(a) A cathode consisted of a substrate, conductive layer and electron emission layer, vacuum gap and an anode;
(b) A conductive layer on the surface of said substrate;
(c) An electron emission layer consisted of carbon nanotubes on said conductive layer;
-
Specification