Inductance extraction for packages with adaptive non-orthogonal ground plane meshing

A method is presented in which a geometry and frequency dependent precalculation of large pin count flat package ground plane currents is performed. We use this precalculation to construct an adaptive nonorthogonal partial element equivalent circuit (PEEC) grid for the correct modeling of the inductance matrix of packages with minimal ground plane discretizations needed. The method is illustrated for a 40-pin flat package. Special attention is given to the convergence and accuracy of the results as a function of the number of PEEC filaments, demonstrating the superiority of the adaptive meshing.