| US 7,501,750 B2 | ||
| Emitting device having electron emitting nanostructures and method of operation | ||
| Bernard F. Coll, Fountain Hills, Ariz. (US); Kenneth A. Dean, Phoenix, Ariz. (US); and Yi Wei, Chandler, Ariz. (US) | ||
| Assigned to Motorola, Inc., Schaumburg, Ill. (US) | ||
| Filed on May 31, 2005, as Appl. No. 11/142,053. | ||
| Prior Publication US 2009/0021136 A1, Jan. 22, 2009 | ||
| Int. Cl. H01J 63/04 (2006.01); H01J 19/06 (2006.01) | ||
| U.S. Cl. 313—495 [313/311; 313/346 R; 313/336; 977/742] | 20 Claims |
| 1. An emission device comprising:
a conductivity limited material having first and second sides and a surface;
a plurality of catalytic nanoparticles positioned within the conductivity limited material and at the surface;
a plurality of nanostructures grown from the catalytic nanoparticles at the surface;
a first electrode disposed contiguous to the first side;
a second electrode disposed contiguous to the second side, the first and second electrodes configured to receive a voltage,
wherein electrons flowing between the first and second electrodes tunnel between catalytic nanoparticles;
an anode positioned so as to extract and receive a portion of the electrons from the catalytic nanoparticles through the nanostructures;
and
means for focusing the emission of the extracted electrons.
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