Patent ID: 11894450
Assignee: GLOBALFOUNDRIES U.S. INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. A structure comprising:
an insulator layer,
a semiconductor layer on the insulator layer;
an emitter region comprising: an emitter portion of the semiconductor layer; and an emitter semiconductor layer partially filling an emitter cavity in the insulator layer and adjacent to the emitter portion, the emitter semiconductor layer comprising an upper portion over a top surface of the emitter portion of the semiconductor layer;
a collector region comprising: a collector portion of the semiconductor layer; and a collector semiconductor layer partially filling a collector cavity in the insulator layer and adjacent to the collector portion, the collector semiconductor layer comprising an upper portion over a top surface of the collector portion of the semiconductor layer; and
a base region positioned laterally between the emitter region and the collector region wherein the emitter cavity and the collector cavity each extend laterally partially below the base region.