Patent ID: 11967637
Assignee: GLOBALFOUNDRIES U.S. INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A structure comprising:
a semiconductor fin having opposing sidewalls, a first width, collector and emitter recesses, and a base recess positioned laterally between and separated from the collector and emitter recesses, wherein the base recess extends across the first width through the opposing sidewalls;
a base region comprising:
a base semiconductor layer on the semiconductor fin at least in the base recess, wherein the base semiconductor layer has a second width that is wider than the first width such that the base semiconductor layer extends laterally beyond the opposing sidewalls; and
an additional base semiconductor layer on the base semiconductor layer; and

collector and emitter regions in the collector and emitter recesses, respectively, wherein top surfaces of the collector and emitter regions are above a level of a top surface of the base semiconductor layer.