Time-domain interconnect model generation of Alloy-42 leadframes

S-parameter (scattering-parameter) measurements were performed on a 240-lead Alloy-42 leadframe. An interconnect RLCM circuit model is used to optimize around the measured s-parameter file. Optimization is then performed in the frequency-domain until the interconnect model is matched to the measured data. Frequency and time-domain circuit simulations are run to compare the measured leadframe, the existing RLCM lumped circuit model, and the optimized models. While the optimized model waveforms produced show an excellent match with the measured data, the existing RLCM model deviates from the measured data response