Patent ID: 9722059
Date: 2017-08-01
CPC Classifications: H01L

Claim:
1. A power transistor, comprising: a semiconductor substrate having a bottom surface and a top surface; a body region of a first conductivity type disposed in said semiconductor substrate and extending to said top surface of said semiconductor substrate; a drift region of a second conductivity type opposite said first conductivity type and disposed in said semiconductor substrate below said body region; a collector region of said first conductivity type disposed in said semiconductor substrate below said drift region and extending to said bottom surface of said semiconductor substrate; an insulated gate extending into said drift region and situated adjacent to a conduction channel in said body region; and a metal emitter above said semiconductor substrate and in direct physical contact with said top surface of said semiconductor substrate, wherein a first portion of the body region that is directly adjacent to the insulated gate extends to the top surface, and wherein the conduction channel is disposed in the first portion of the body region, and wherein the metal emitter directly contacts the conduction channel at the first portion of the body region.