Electrical modeling of extremely large packages

Highly complex packages are analyzed by breaking them into large regions or blocks that are joined at their boundaries and solving for the currents using a moment method approach. Blocks are isolated from each other, except along the boundaries between blocks, and this serves to connect the blocks together. Full coupling is maintained within each block. The procedure is applied to structures where the coupling is expected to fall off rapidly, for instance in structures that have one or more contiguous reference planes and thus have nearby return currents. The examples involve a two-mesh-plane structure that contains one or more signal lines. The results are verified through a number of experiments and through comparison with known results for canonical transmission line structures