Bipolar-mode Schottky contact and applications to high-speed diodes

Abstract

A Schottky contact operation combined with minority-carrier transport, a concept of bipolar-mode Schottky contacts, is proposed. There are two bipolar-mode Schottky contacts. One acts as a minority-carrier injector causing conductivity modulation without excessive carrier accumulation, while the other operates as an ideal ohmic contact to conduct minority carriers without accumulation. Applicationally, these contacts are utilized to improve conventional Schottky diodes and p-n diodes, respectively and a high-voltage Schottky diode (BSBD) and a fast-recovery p-n diode (quasi-LLD) can then be realized.