Canonical package problem solved using six different codes

A major difficulty faced by package engineers in solving package problems is the reconciliation of results generated from multiple analysis techniques. Consider a signal integrity analysis of a net using 2D codes to characterize the long signal line (transmission line) portions and 3D LC or full-wave codes to characterize the discontinuity portions. Since the discontinuity must be modeled with an attached section of signal line to properly reflect the surroundings, an inconsistency results if these codes yield different results for the signal line portion. In this paper, we demonstrate a suite of tools and a package analysis methodology that provides the user with the consistency in results needed to assure correct subsequent simulation. A package structure involving two signal lines situated between a pair of mesh reference planes is solved using six different techniques ranging from static 2D to static 3D to full-wave 3D. The analysis methodology and code formulation are shown to yield results that closely agree between the approaches