A Fast Algorithm for 3-D Inductance Extraction Based on Investigation of Open-Circuit Current

As a famous interconnect extraction software, FastHenry can compute frequency-dependent interconnect inductance with high accuracy. But its low speed prevents it from being applied to deal with industry examples with large scale. Up to now, almost all acceleration methods for inductance extraction, e.g. the K-element method, are based on omitting the current of victim conductors, which is shorted and far away from aggressor conductor with 1 volt bias voltage. In this paper, we investigate the filament currents distribution on conductors while setting victim conductor open or shorted. Based on observation of less current on open-circuit conductors, we propose a new acceleration method for inductance extraction. The numerical results show that this method is faster than FastHenry for hundred times and preserves the similar accuracy.