Modeling and Simulation of Poly-Space Effects in Uniaxially-Strained Etch Stop Layer Stressors

We develop, for the first time, a compact and scalable model to account for the poly-space effects (PSEs) in uniaxially-strained etch stop layer (ESL) stressors. The model is based on 2-dimensional (2D) finite element (FEM) stress simulations and 4-point bending characterization of silicon, and agrees well with measured data. The impact of PSEs on circuit performance is also discussed.