Patent ID: 8785977
Filing Date: 2014-07-22
Classification: H01L

Abstract:
1. A high-speed SiGe HBT, comprising: a substrate; shallow trench isolations formed in the substrate; a collector region formed beneath a surface of the substrate and located between the shallow trench isolations; an epitaxial dielectric layer including two portions, a first one of the portions being located on the collector region, a second one of the portions being located on one of the shallow trench isolations; a base region formed both in a region between the two portions of the epitaxial dielectric layer and on surfaces of the two portions of the epitaxial dielectric layer; an emitter dielectric layer including two portions, both portions being formed on the base region; an emitter region formed both in a region between the two portions of the emitter dielectric layer and on surfaces of the two portions of the emitter dielectric layer; and a contact hole, formed on a surface of each of the base region, the emitter region and the collector region.