Patent ID: 7572707

Claim:
A method of forming a semiconductor device comprising: blanket implanting a first plurality of dopants into a substrate to form a buried layer, wherein a masking step is not utilized to form the buried layer; growing an epitaxial layer on the buried layer; implanting a second plurality of dopants into a first portion of the epitaxial layer to form a first well region within the epitaxial layer; implanting a third plurality of dopants into a second portion of the epitaxial layer to form a second well adjacent to the first well within the epitaxial layer; forming a base region in a top portion of the first well region; forming an emitter terminal within the base region and a collector terminal within the first well region adjacent to the base region; and forming a base terminal within the base region and adjacent to the emitter terminal, wherein the first plurality of dopants include a plurality of p-type dopants, the second plurality of dopants include a plurality of n-type dopants, and the third plurality of dopants include a plurality of p-type dopants.