Single Photon Avalanche Diodes

Robert K. Henderson (Inventor), Justin Richardson (Inventor)

Research output: Patent

Abstract / Description of output

A CMOS single photon avalanche diode (SPAD) design uses conventional, or at least known, CMOS processes to produce a device having a breakdown region in which the main p-n junction is formed of a deep n-well layer, and optionally on the other side, a p-add layer. The SPAD may also have a guard ring region which comprises the p-epi layer without any implant. The SPAD may have curved or circular perimeters. A CMOS chip comprises SPADs as described and other NMOS devices all sharing the same deep n-well.
Original languageEnglish
Patent numberUS8552482B2
Filing date10/07/08
Publication statusPublished - 16 Aug 2012


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