Patent ID: 7115924
Filing Date: 2006-10-03
Classification: H01L

Abstract:
1. A pixel comprising: a substrate of a first conductivity type; a photodetector of a second conductivity type that is opposite the first conductivity type and configured to convert incident light to a charge; a floating diffusion of the second conductivity; a transfer region between the photodetector and floating diffusion; a gate formed above the transfer region and partially overlapping the photodetector and configured to transfer the charge from the photodetector to the floating diffusion; a pinning layer of the first conductivity type extending at least across the photodetector from the gate; and a channel region of the first conductivity type extending generally from a midpoint of the gate at least across the photodetector, wherein the channel region is formed by an implant of a dopant of the first conductivity and having a concentration such that a dopant concentration of the transfer region is greater proximate to the photodetector than proximate to the floating diffusion.