Uniform electron emission from a nitrogen-doped diamond-based electron emitter fabricated by the sintering technique

A nitrogen (N)-doped diamond-based electron emitter has been fabricated by the sintering technique prior to the chemical vapor deposition process in order to improve the uniformity. There are no spatial difference in reflective electron energy loss spectrum (REELS) from the diamond-based electron emitter, suggesting that the uniform surface conditions are obtained, The uniform electron emission from the obtained electron emitter is confirmed through the emission current vs anode voltage characteristics measurements. It seems that the uniformity of the emitter surface results in the uniform electron emission from the diamond electron emitter.