A number of methods are presentedfor highly efficient calculation of substratecurrenttransport. A three-dimensionalGreen'sFunction based substrate representation, in combination with the use of the Fast Fourier Transform, significantly speeds up the computation of sensitivities with respect to all parameters associated with a given architecture. Substrate sensitivity analysis is used in a number of physicaloptimization tools, such as placementand trend analysis for the estimation of the impact of technology migration and/or layout re-design.
Edoardo Charbon, Ranjit Gharpurey, Alberto L. Sang