METHOD FOR MANUFACTURING NANO-TUBE, NANO-TUBE MANUFACTURED THEREBY, APPARATUS FOR MANUFACTURING NANO-TUBE, METHOD FOR PATTERNING NANO-TUBE, NANO-TUBE MATERIAL PATTERNED THEREBY, AND ELECTRON EMISSION SOURCE
US6759024B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 21, 2001 |
| Grant date | Jul 6, 2004 |
| Priority date | — |
| Expiry date | Nov 21, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/844
- WIPO fieldMicro-structural and nano-technology
- WIPO sectorChemistry
Abstract
A method of instantaneously forming a surface of an arc-treated material mainly including graphite into nano-tubes due to arc discharge carried out using a unit like a welding arc torch or the like without necessarily requiring a processing container, resulting in the nano-tube being applied to an electron emission source. A torch electrode acting as a first electrode and the arc-treated material made of graphite and acting as a second electrode are arranged opposite to each other. A potential is applied between both electrodes to generate arc discharge therebetween. A mask having an opening pattern is arranged on the arc-treated material, so that only graphite positioned on portions of a surface of the arc-treated material corresponding to openings of the mask are exposed to arc, to thereby be formed into nano-tubes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.