Synthesis of time-domain models for interconnects having 3-D structure based on FDTD method

This report describes an efficient method to simulate transient responses o f multilayer and multiconductor interconnects having three-dimensional stru cture. First, the impulse responses between any pair of terminals of lines are obtained by the Finite-difference time-domain (FDTD) method. Next, the frequency responses are obtained by the Fourier transform of these transien t waveforms. The time-domain models are synthesized from the frequency resp onses by using the least-square approximation and the complex frequency-hop ping technique. Finally, with this model, the transient responses are rapid ly simulated by the conventional circuit simulators. In conclusion, the val idity of this method is verified by comparison with the time-consuming FDTD simulation.