Study on self-focusing performance of electron beam in electron emitter with cone shaped array

In recent years, field emission display (FED) has been attracting much attention in the science community. It is a key technology for FED to design an excellent cathode structure. Rational designs can decrease cost and simplify fabrication technology in the preparation process of the cathode. A field electron emitter with a novel self-focusing cathode has been proposed. And it can be easily fabricated with low cost. Besides, field emission materials are also an important research field for FED application. In this paper, patterned and uniform nanocone array films with good emission properties were used as the electron source. The electron trajectory in this emitter and the influences of the array films with various relative permittivities on the distribution of the electric field investigated by finite element method will be reported.