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In this paper, we report on the evaluation of the emission uniformity in the emission area of the cathodes by using a Faraday-cup with a probe hole of 20 mum in diameter. In the experiments, the cathodes were operated in pulse mode with the frequency of 100 Hz with pulse width of 250 mus in a vacuum of 10"8 Pa.
This paper reports the successful fabrication of a field emitter array with a built-in multi-electrode lens, such as a quad-gate and a penta-gate FEA. The fabrication is based on an etch-back technique.
In this paper, a self-focusing field electron emitter was proposed and simulated with finite element method. In the electron emitter proposed, the gate electrode is placed on center and surrounded by cathode. Therefore, gate electrode is not only to extract the electron from cathode, but also to focus the electron beam. The simulated results show a significant decrease of the dispersion of electron...
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