Method for manufacturing an electric emitting device with first and second carbon films
US7234985B2 · kind B2 · utility
8Cited by
15References
10Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 28, 2006 |
| Grant date | Jun 26, 2007 |
| Priority date | — |
| Expiry date | Feb 28, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2329/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electron-emitting device comprises a pair of electrodes and an electroconductive film arranged between the electrodes and including an electron-emitting region carrying a graphite film. The graphite film shows, in a Raman spectroscopic analysis using a laser light source with a wavelength of 514.5 nm and a spot diameter of 1 μm, peaks of scattered light, of which 1) a peak (P2) located in the vicinity of 1,580 cm−1 is greater than a peak (P1) located in the vicinity of 1,335 cm−1 or 2) the half-width of a peak (P1) located in the vicinity of 1,335 cm−1 is not greater than 150 cm−1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.