Design and Experiments on Improved Cathode Configuration for Diamond Planar Field Emission Display Elements

概要

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In the planar-type field emitter, there is a problem in that the current extraction yield from the cathode to anode electrodes is considerably low regardless of the field emission efficiency at the tunneling-cathode. According to the computer simulation, this is due to a negative potential distribution overlying the tunneling-gap area of the cathode electrodes. We here designed a new cathode electrode configuration which promises a high current extraction yield via reducing the negative potential barrier height. The proposed cathode is equipped with three electrodes, two of which serve as the field emitter of the primary electrons as usual and the third one (high impedance gate) plays an important role for reducing the negative potential barrier height. We carried out the preliminary experiment to examine to what extent the gate electrode could improve the device performance. Although our experiment was in the preliminary stage, the anode current extraction yield was significantly increased: the current extraction yield (a ratio of the anode current and the primary field emission current at the tunneling cathode) of the proposed emitter was 1–3%, which is about ten fold that of the conventional planar emitter of 0.1–0.4%.
Publication Office, Japanese Journal of Applied Physics, Faculty of Science, University of Tokyoの論文
2003-01-15