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

Claim 4:
5. The structure of claim 1, further comprising an insulator layer adjacent to the opposing sidewalls of the semiconductor fin,
wherein a bottom of the base recess and bottoms of the collector and emitter recesses are above a level of a top surface of the insulator layer,
wherein the base semiconductor layer extends along the opposing sides of the semiconductor fin to the top surface of the insulator layer, and
wherein the additional base semiconductor layer wraps over the base semiconductor layer to the insulator layer and fills remaining space within a base opening that extends through interlayer dielectric material to the semiconductor fin, that has a third width that is wider than the second width, and that has vertical surfaces lined with sidewall spacers.