Patent ID: 9000500
Filing Date: 2015-04-07
Classification: H01L

Abstract:
1. An image sensor comprising: at least one photodetector formed in a substrate layer; a well including a charge-to-voltage conversion region formed in the substrate layer; a transfer gate disposed between each photodetector and charge-to-voltage conversion region; a first implant region including a first dopant disposed over a second implant region including a second dopant, wherein the first and second implant regions extend from an edge of the transfer gate overlapping the charge-to-voltage conversion region and are disposed in only a portion of each transfer gate, wherein the charge-to-voltage conversion region includes the first dopant of the first implant region which extends from below the edge of the transfer gate away from the transfer gate and is substantially devoid of the second dopant of the second implant region, and wherein the first dopant and the second dopant have a conductivity type that is opposite a conductivity type of the well.