Field emission material having an inter-layer spacing and further coated with insulating material
US7355330B2 · kind B2 · utility
3Cited by
4References
53Claims
0Family size
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Key dates
| Filing date | Mar 11, 2002 |
| Grant date | Apr 8, 2008 |
| Priority date | — |
| Expiry date | Oct 5, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Graphite comprises atoms arranged in discrete layers (100). The perpendicular distance between these layers is the ‘d-spacing’ (101). A field emission material is obtained by expanding the d-spacing (102). Such expansion may be achieved by an intercalant that has been introduced between layers of the material. Such an intercalant may reside, or may no longer reside, in the material. The material may be placed in position on a substrate by a printing process, prior to expansion. Such field emission material may be used in cold cathodes in field electron emission devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.