Patent ID: 9410901
Filing Date: 2016-08-09
CPC Classification: G01N,H01L

Claim Text:
1. A backside-illuminated avalanche sensor comprising: an epitaxial silicon layer; a thin highly doped p-type layer, an n-type doped layer and a boron layer disposed on a light-sensitive surface of the epitaxial silicon layer; and circuits formed on an opposing surface of the epitaxial silicon layer, wherein the epitaxial silicon layer comprises one of intrinsic silicon and p-type doped silicon with less than 2×10 wherein the circuits comprise an n-type doped buried channel, wherein at least some of the circuits are fabricated in a grounded p+ well with a dopant concentration greater than 10 wherein the thin highly doped p-type layer comprises p-type doped silicon with a dopant concentration greater than 5×10 wherein the n-type doped layer comprises n-type doped silicon with a dopant concentration between 5×10