| US 7,579,764 B2 | ||
| Field emission electron source having carbon nanotube | ||
| Wei Wei, Beijing (China); Kai-Li Jiang, Beijing (China); and Shou-Shan Fan, Beijing (China) | ||
| Assigned to Tsinghua University, Beijing (China); and Hon Hai Precision Industry Co., Ltd., Tu-Cheng, Taipei Hsien (Taiwan) | ||
| Filed on Sep. 01, 2006, as Appl. No. 11/514,596. | ||
| Claims priority of application No. 2006 1 0060186 (CN), filed on Apr. 05, 2006. | ||
| Prior Publication US 2007/0236126 A1, Oct. 11, 2007 | ||
| Int. Cl. H01J 1/304 (2006.01); H01J 1/05 (2006.01) | ||
| U.S. Cl. 313—311 [313/310; 313/495] | 8 Claims |
| 1. A field emission electron source comprising:
a conductive base having a top;
a carbon nanotube having a first end and a second end, the first end being electrically and mechanically connected with the
top of the conductive base, the second end extending outwardly away from the top of the conductive base; and
a modifying layer being uniformly distributed and coated onto at least the second end of the carbon nanotube, at least part
of the modifying layer penetrating the second end, the work function of the modifying layer being lower than that of the carbon
nanotube;
wherein the top is a tapered;
wherein there is only one carbon nanotube, the carbon nanotube is electrically connected to the tapered top of the conductive
base and is co-linear with a center line of the conductive base.
|