Methods for making field emission electron source having carbon nanotube
US7785165B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 1, 2006 |
| Grant date | Aug 31, 2010 |
| Priority date | — |
| Expiry date | Apr 17, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2201/30469
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for manufacturing a field emission electron source includes the following steps: (a) providing a pair of conductive bases (32, 42) each having a top (322, 422), the tops being spaced apart from and opposite to each other, the tops being immersed in a solution (50) having carbon nanotubes dispersed therein; (b) applying an alternating voltage (60) between the two conductive bases thereby causing at least one carbon nanotube to become assembled between the tops of the conductive bases; (c) shutting off the alternating voltage between the conductive bases and removing the solution between the tops of the two conductive bases; (d) detaching one of the two conductive bases in a matter such that the carbon nanotube remains connected with one of the tops of the conductive bases; and (e) modifying the carbon nanotube to create a low work function coating on a least a tip/free end thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.