Patent ID: 8592293

Claim:
A method of forming a Schottky barrier diode (SBD) on a SiGe BiCMOS wafer, comprising: forming a first collector at a first depth in a substrate of the wafer, wherein the first collector is comprised by the SBD with a cutoff frequency (F c ) above about 1.0 THz; forming a first epitaxial layer on the substrate; forming a first conducting channel in the first epitaxial layer; forming a second collector at a second depth in the first epitaxial layer, wherein the first depth is different from the second depth and the second collector is comprised by a high performance NPN device; forming a second epitaxial layer on the first epitaxial layer over the first collector and the second collector; forming a second conducting channel in the second epitaxial layer; and forming a well tailor region in the first epitaxial layer and the second epitaxial layer over the first collector.