Patent ID: 7851868
Filing Date: 2010-12-14
Classification: H01L

Abstract:
1. A metal-oxide-semiconductor device including a P type device and an N type device located adjacent to each other and comprising: first and second gate dielectric regions; and a continuous polysilicon film formed on the first and second gate dielectric regions, the continuous polysilicon film including a step formed at a border of the first and second gate dielectric regions and separating a first doped polysilicon portion from a second doped polysilicon portion, the first doped polysilicon portion having a relatively larger thickness and a first dopant with a relatively faster dopant diffusion rate than a dopant diffusion rate of a second dopant in the second doped polysilicon portion, and further comprising a third doped polysilicon portion of the continuous polysilicon film, the third doped polysilicon portion having a thickness greater than each of the first and second doped polysilicon portions and a third dopant with a faster dopant diffusion rate than the dopant diffusion rates in each of the first and second doped polysilicon portions.