A snapback-free RC-LIGBT with separated LIGBT and FWD

Abstract

A novel Snapback-free RC-LIGBT with Separated LIGBT for forward conduction and anti-parallel FWD (SLF) for the reverse conduction, named SLF LIGBT is proposed and investigated. The SLF features independent LIGBT with N-pillar drift and FWD with P-pillar drift of the Superjunction, which is dielectric isolated by the sio₂, thus the carrier conduction region of the drift is divided into top and bottom two layers. The results show that the snapback is completely eliminated for the proposed SLF-LIGBT, and the excellent forward conduction V_ON and reverse conduction V_R are achieved.