Patent ID: 7648871
Filing Date: 2010-01-19
Classification: H01L

Abstract:
1. A semiconductor device comprising: a channel region located between a source region and a drain region; a gate dielectric layer located over the channel region; a gate electrode located over the gate dielectric layer; a first dielectric layer located over and covering the source region, the drain region, and the gate electrode; a second dielectric layer located over the first dielectric layer; and at least one metallic contact electrically connected to either the source or the drain region, wherein said at least one metallic contact comprises a lower portion that is located in the first dielectric layer and an upper portion that is located in the second dielectric layer, and wherein the lower portion has a larger cross-sectional area than the upper portion, and wherein the lower portion and the upper portion are of integral construction without a physically manifested interface, and wherein a horizontal cross-sectional area of said lower portion and a horizontal cross-sectional area of said upper portion are concentric circles having different diameters.