In this work, we investigate the electrical performance of critical signal
paths in IBM's S/390 MCM packages, We present lumped RLC-models suitable fo
r standard circuit simulators like e.g. SPICE. The models are developed fro
m finite element simulations of typical signal path segments. By comparing
S-parameters from simulations of the models to two-port network analyzer me
asurements we validate the models in a frequency range up to 3 GHz.