Carbon nanotube and method for producing the same, electron source and method for producing the same, and display
US7375366B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2001 |
| Grant date | May 20, 2008 |
| Priority date | — |
| Expiry date | Jul 15, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2975
- WIPO fieldMicro-structural and nano-technology
- WIPO sectorChemistry
Abstract
A carbon nanotube has a carbon network film of polycrystalline structure divided into crystal regions along the axis of the tube, and the length along the tube axis of each crystal region preferably ranges from 3 to 6 nm. An electron source includes a carbon nanotube having a cylindrical shape and the end of which on the substrate side is closed and disposed in a fine hole. The end on the substrate side of the tube is firmly adhered to the substrate. The carbon nanotube is produced by a method in which carbon is deposited under the condition that no metal catalyst is present in the fine hole and produced by a method in which after the carbon deposition the end of the carbon deposition film is modified by etching the carbon deposition film using a plasma. Therefore, an electron source excellent in the evenness of field emission characteristics in a field emission region (pixel) in the device plane and driven with low voltage can be provided, and a display operated with ultralow power consumption exhibiting ultrahigh luminance can be provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.