Patent ID: 11935928
Assignee: GLOBALFOUNDRIES U.S. INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A structure comprising:
a base formed on a semiconductor substrate;
an asymmetrical spacer on the base, the asymmetrical spacer comprising a vertical sidewall directly contacting a first sidewall of the base and an L-shaped sidewall directly contacting another sidewall of the base;
an emitter on a first side of the base and separated from the base by the vertical sidewall of the asymmetrical spacer; and
a collector on a second side of the base and separated from the base by the L-shaped sidewall of the asymmetrical spacer,
wherein the asymmetrical spacer is a single spacer which surrounds the base, wherein the vertical sidewall directly contacts the first sidewall of the base and is adjacent to the emitter and the L-shaped sidewall directly contacts the other sidewall of the base and is adjacent to the collector.