Patent ID: 11961933
Assignee: STMICROELECTRONICS S.R.L.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A Geiger-mode avalanche photodiode, comprising:
a semiconductor body, the semiconductor body including:
a semiconductive structure;
a front epitaxial layer on the semiconductive structure, the front epitaxial layer having a first conductivity type; and
an anode region extending into the front epitaxial layer, the anode region having a second conductivity type that is different from the first conductivity type;

a plurality of gettering regions in the semiconductive structure;
a first dielectric layer on the semiconductor body, the first dielectric layer defining a recess that exposes the anode region;
a second dielectric layer on the semiconductor body and on the first dielectric layer, the second dielectric layer extending into the recess; and
a polysilicon layer on the first dielectric layer and in contact with the semiconductor body in the recess, the polysilicon layer having the second conductivity type.