Patent ID: 8035167

Claim:
A complementary bipolar semiconductor device, hereinafter referred to as a CBi semiconductor device, comprising: a substrate of a first conductivity type, active bipolar transistor regions in the substrate, in which a base, an emitter and a collector of vertical bipolar transistors are arranged, vertical epitaxial-base npn bipolar transistors in a first subset of the active bipolar transistor regions, vertical epitaxial-base pnp bipolar transistors in a second subset of the active bipolar transistor regions, at least one collector contact region which is respectively arranged adjoining an active bipolar transistor region, and shallow field insulation regions which respectively laterally delimit the active bipolar transistor regions and the at least one collector contact region, wherein the shallow field insulation regions form insulation regions in trench form which terminate approximately flush with the substrate surface, characterized in that arranged between the first or the second or both the first and also the second subset of active bipolar transistor regions on the one hand and the at least one adjoining collector contact region on the other hand is a respective shallow field insulation region of a first type with a first depthwise extent of between 50 and 200 nm in the direction of the substrate interior and shallow field insulation regions of a second type of a second greater depthwise extent than the first depthwise extent of between 300 and 600 nm delimit the active bipolar transistor regions and the at least one collector contact region viewed in cross-section at their sides facing away from each other.