Carbon-metal nano-composite materials for field emission cathodes and devices
US6891324B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 26, 2002 |
| Grant date | May 10, 2005 |
| Priority date | — |
| Expiry date | Oct 11, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A field emission cathode consisting of atomic-scale composite material comprising three atomic networks is proposed. The first and the second atomic networks penetrate into each other and form carbon-based stabilized dielectric medium and the third atomic network is a conductive network of metallic atoms. The atomic scale composite material may also contain conductive nano-crystals immersed into the carbon-based stabilized dielectric medium. The atomic-scale conductive network and nano-crystals reach the film surface and film edge forming nanometer scale field emission sites. They may be partially exposed by etching the other components of the cathode material thereby forming atomic-scale and/or nano-scale field emission metallic tips.The field emission cathode can be used as an efficient cold cathode in a variety of electronic devices, such as flat panel field emission displays, microwave diodes, triodes and more complex devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.