Abstract: A newly fabricated T-shaped disk-edge field emitter is considered in this paper. Numerical results are presented for a unit cell, consisting of emitter, gate, and anode. A new algorithm, the finite-difference method in a non-orthogonal curvilinear coordinate system (FDM-NOCCS), is used for the calculation of electrostatic field. With the boundary-conforming coordinate lines, this method can deal with microemitter with various shapes efficiently. The dependence of electric field intensity and emitted current upon geometrical factors, the sketch of electron traces and I-V characteristics are presented. Several suggestions are given for the geometry determination of the triode in fabrication.

Key words: electrostatic analysis, disk-edge field emitter, finite-difference method, non-orthogonal curvilinear coordinate system, coordinate transformation technique