Patent ID: 9245985
Filing Date: 2016-01-26
CPC Classification: H01L

Claim Text:
1. An insulated-gate bipolar transistor (IGBT) in a semiconductor substrate, said IGBT comprising: a collector at a bottom surface of said semiconductor substrate, a drift region having a first conductivity type situated over said collector, and a base layer having a second conductivity type opposite said first conductivity type situated over said drift region; a plurality of deep insulated trenches extending from a semiconductor surface above said base layer, into said drift region, each of said deep insulated trenches having a buried emitter electrode disposed therein; an active cell including an emitter, a gate trench with gate electrode disposed therein, and an implant zone, situated between adjacent deep insulated trenches that are substantially deeper than said gate trench; said implant zone being formed below said base layer and having said first conductivity type.