Patent ID: 8334179
Filing Date: 2012-12-18
Classification: H01L

Abstract:
1. A semiconductor system, comprising: a highly n-doped silicon substrate; a first n-silicon epitaxial layer, which is directly contiguous to the highly n-doped silicon substrate; a p-doped SiGe layer, which is contiguous to a second n-doped silicon epitaxial layer and forms a heterojunction diode, which is situated above the first n-doped silicon epitaxial layer and in which the pn-junction is disposed within the p-doped SiGe layer, the first n-silicon epitaxial layer having a higher doping concentration than the second n-silicon epitaxial layer; and at least one p-doped emitter trough lying between the two n-doped epitaxial layers and forming a buried emitter, a pn-junction both to the first n-doped silicon epitaxial layer and also to the second n-doped silicon epitaxial layer being formed, and the at least one emitter trough being completely enclosed by the two epitaxial layers.