Abstract
The frequency-dependent resistance and inductance can be calculated by solving an eddy current problem. In this paper, a model to describe such a 3D eddy current problem is proposed, called the 3D Omni-A model because both the conducting and nonconducting regions are described in terms of magnetic vector potential A. Therefore, the induced voltages of the conductors may appear as the unknowns directly in the boundary integral equations (BIE). Compared with popular coupled circuit methods, the computational method based on the 3D Omni-A model has two advantages. First, it does not fix the current direction along the axis of conductor, so in this method the perpendicular conductors may have mutual impedance. It could be more accurate in deep submicron (0.1 /spl mu/m) chips at high speed (10 GHz). Secondly, it only discretizes the surfaces of the conductor, so it can be more efficient.
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