| 摘要 |
A carbon film used for a field emission cathode comprises a layer of thin carbon film on a substrate. With 244 nm and 2-7 mW excitation, and within the wave number from 1100 to 1850 cm-1, the carbon film has a distinct UV Raman band in the range from 1578 cm-1 to 1620 cm-1 with a full width at half maximum from 25 to 165 cm-1. The carbon film can be deposited by chemical vapor deposition, physical vapor deposition, electrolysis, printing or painting, and can be continuous or noncontinuous.
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