Modeling Process Variations Using a Compact Model

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Inclusion of manufacturing variations has become an important part of static timing analysis. Existing statistical timing analysis methods involve the use of time-consuming circuit simulations or use fit polynomials. Previous efforts at modeling parameter variations have yielded equations that are not closed-form and might require numerical solutions. In this work a compact model is derived to predict the effect of manufacturing variations on the delay distribution of circuits. The model is physics-based, shows excellent match with simulations, and is valid over a wide range of device parameters. The model can be used to rapidly assess the impact of various circuit and device parameters on delay variation and thus is a useful tool for design-for manufacturing (DFM) as well as design space exploration.

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Journal: TechConnect Briefs
Volume: 3, Technical Proceedings of the 2007 NSTI Nanotechnology Conference and Trade Show, Volume 3
Published: May 20, 2007
Pages: 558 - 561
Industry sector: Sensors, MEMS, Electronics
Topics: Compact Modeling
ISBN: 1-4200-6184-4