| 摘要 |
In a field emission film used for a field emission cathode, a filamentous structure layer is formed in the vicinity of tops of acicular projections to emit electrons. The filamentous structure layer serves to remarkably increase emission points and, as a result, to improve an emission current density. The filamentous structure layer may be composed of a carbon and is obtained by carrying out plasma processing within a hydrogen gas and/or an oxygen gas for a long time.
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