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As experimental results show, a lower turn on electric field of 1.2V/mum is achieved, and a total emission current of 20 mA is obtained from a 0.8 cm2 area ZnO nanostructures-based cathode, which is enough for radiating an adequate x-ray dose. Furthermore, a good focus performance of electron beam is also obtained with the new focusing electrode-pattern. The ZnO nanostructures-based cold cathode x-ray...
In the previous study, the surface-conduction field emission (SCFE) structure has been proposed. The SCFE structure can be fabricated very easily with low cost. However, the electron beam diverges seriously in a SCFE structure. To improve the focus performance of electron beam, a SCFE structure with focus electrode is proposed in this paper.
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