Patent ID: 7288788
Filing Date: 2007-10-30
Classification: H01L,Y02E

Abstract:
1. An imaging sensor comprising: a substrate including a collection well of a first conductivity type, a pinning layer of a second conductivity type formed on the collection well, said pinning layer and collection well layer forming part of a photodiode structure for said imaging sensor, and a diffusion region of a second conductivity type; a gate dielectric formed on the substrate; and a gate conductor formed on the gate dielectric having a first side adjacent to the collection well and a second side adjacent to the diffusion region, said ate conductor including a first region having a second conductivity type dopant material at a first concentration and, a second region having said second conductivity type dopant material at a second concentration different than the first concentration, wherein the first region is formed on the first side of said gate conductor and the second region is formed on the second side of said gate conductor.