ADVANCED PHYSICAL MODEL FOR THE OPTIMIZATION OF THE WIDTH OF A RESISTIVE SCHOTTKY-BARRIER FIELD PLATE

An advanced physical model based on a solution of Laplace's equation f or a set of prescribed boundary conditions is developed, which describ es the potential distribution across a resistive Schottky-barrier fiel d plate (RESP). The model serves to ascertain an optimised RESP width, for an optimised RESP sheet resistance, for any potential bias. Optim ising the width of the RESP for an optimised sheet resistance will enh ance the reverse breakdown voltage handling capability of a Schottky-b arrier diode whose periphery is terminated by such a structure. Using an optimised RESP structure will reduce the material costs and improve the high-speed operation of diodes which are edge-terminated in this manner.