Patent ID: 7397108
Filing Date: 2008-07-08
Classification: H01L

Abstract:
1. A monolithically integrated bipolar transistor comprising: an SOI substrate, a collector region in said SOI substrate, and an emitter/base region including (i) a base layer region on top of and in contact with said collector region, and (ii) an emitter layer region on top of and in contact with said base layer region, said collector, base layer, and emitter layer regions being provided with separate contact regions, wherein a region of an insulating material is provided in said emitter/base region, said region of said insulating material extending laterally at a fraction of a width of said emitter/base region to reduce an effective width of said bipolar transistor, wherein said base layer region has a thickness, and said region of said insulating material is provided within said base layer region at a distance from said emitter layer region, which is less than about half the thickness of said base layer region.