Patent ID: 11888050
Assignee: GLOBALFOUNDRIES U.S. INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. A lateral bipolar transistor structure comprising:
an emitter/collector (E/C) layer over an insulator, the E/C layer having a first doping type;
a first base layer on the insulator and adjacent the E/C layer, wherein the first base layer has a second doping type opposite the first doping type;
a second base layer on the first base layer and having the second doping type, wherein a dopant concentration of the second base layer is greater than a dopant concentration of the first base layer, the second base layer including:
a lower portion having a first horizontal width over the first base layer, and
an upper portion having a second horizontal width over the first base layer greater than the first horizontal width;

an inner spacer on the E/C layer and adjacent the second base layer; and
an outer spacer on the E/C layer and adjacent the inner spacer.