Patent ID: 11949035
Assignee: STMICROELECTRONICS (CROLLES 2) SAS
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. An integrated circuit, comprising:
a semiconductor well doped with a first type of dopant; and
a single photon avalanche diode (SPAD) in the semiconductor well, said SPAD including a PN junction between a first region doped with the first type of dopant and a second region doped with a second type of dopant opposite to the first type of dopant;
wherein the first region comprises:
a first sub-region positioned in contact with a bottom of the second region and centered with respect to the second region;
a second sub-region forming an annular volume laterally surrounding the first sub-region and an in contact with at least a side edge of the first sub-region; and
a plurality of third sub-regions where each third region radially extends inwardly from the annular volume of the second sub-region and is in contact with a bottom of the first sub-region.