Patent ID: 9634129
Date: 2017-04-25
CPC Classifications: H01L

Claim:
1. An insulated gate bipolar transistor (IGBT), comprising: a gate trench; an emitter trench; an electrically insulative layer coupled to the emitter trench and to the gate trench and electrically isolating the gate trench from an electrically conductive layer, and; an opening in the electrically insulative layer that extends into the emitter trench and extends into a doped semiconductor layer located between the emitter trench and the gate trench; wherein the electrically conductive layer electrically couples with the emitter trench through the opening in the electrically insulative layer; and wherein the gate trench, the emitter trench, the electrically insulative layer and the electrically conductive layer form at least a part of the insulated gate bipolar transistor (IGBT).