Patent ID: 7855404
Filing Date: 2010-12-21
Classification: H01L

Abstract:
1. A complementary bipolar semiconductor (CBi) device, hereinafter referred to as a CBi semiconductor device, comprising a substrate of a first conductivity type and a number of active regions which are provided thereon and which are delimited in a lateral direction by shallow field insulation regions, in which vertical npn-bipolar transistors with an epitaxial base are arranged in a first subnumber of an active bipolar transistor regions and vertical pnp-bipolar transistors with an epitaxial base are arranged in a second subnumber of the active bipolar transistor regions, wherein either one transistor type or both transistor types have both a collector region and also a collector contact region in one and the same respective active bipolar transistor region, characterized in that in a first transistor type in which the conductivity type of the substrate is identical to that of the collector region an insulation doping region is provided between the collector region and the substrate, the insulation doping region being adapted to provide electrical insulation of a collector and the substrate, wherein in a region of an interface between the collector region and the insulation doping region there is a p-n junction which is arranged no deeper at an edge defined by the field insulation region of the active bipolar transistor region in question, alternatively in the whole of the respective active bipolar transistor region, than the lower edge of the shallow field insulation regions, and the collector region either of the first transistor type or both transistor types is delimited laterally by the shallow field insulation regions.