STUDY OF A NOVEL T-SHAPED DISK-EDGE FIELD EMITTER STRUCTURE

A newly fabricated T-shaped disk-edge field emitter is considered. Num erical results are presented for a unit cell, consisting of emitter, g ate and anode. A new algorithm, the finite-difference method in a non- orthogonal curvilinear coordinate system, is used for the simulation. With the boundary-conforming coordinate lines, this method can efficie ntly deal with microemitter shapes. The dependence of the field enhanc ement factor on geometrical factors and the I-V characteristics are pr esented. Suggestions are given to determine the geometry in fabricatio n.