Patent ID: 9059710
Filing Date: 2015-06-16
Classification: H01L,H02M,H03K

Abstract:
1. A semiconductor device, comprising: first-conductivity-type emitter regions on opposing faces of a second-conductivity-type semiconductor mass; second-conductivity-type base contact regions on said opposing faces of said second-conductivity-type semiconductor mass; a thin layer of tunnel oxide between each said first-conductivity-type emitter region and said second-conductivity-type semiconductor mass, and which forms a differential between holes and electrons; drive circuitry which applies sufficient current to a a selected base contact region to generate a nonequilibrium carrier concentration, in the interior of said semiconductor mass, which is more than thirty times as great as the off-state equilibrium majority carrier concentration, to thereby lower the voltage drop across the second-conductivity-type semiconductor mass; and oxide-filled trenches between each said first-conductivity-type emitter region and respectively adjacent second-conductivity-type base contact regions.