Patent ID: 8731877
Filing Date: 2014-05-20
Classification: G06F,H01B

Abstract:
1. A method of modeling surface impedance of an interconnect conductor of an integrated circuit design in which the conductor has a current flow in a z-direction, the method comprising: formulating a volumetric electric field integral equation with respect to an unknown volumetric current density j representing the unknown volumetric current density in the volumetric electric field integral equation as a product of a current density of a peripheral surface of the conductor and an exponential factor describing a cross-sectional distribution of the current flow according to skin effect by approximating the unknown volumetric current density, represented as j where J adopting an approximation of Green's function across a cross-section of the conductor; and reducing the volumetric electric field integral equation including the unknown volumetric current density representation to a surface integral equation using the approximation of Green's function, resulting in a surface impedance model; and applying the surface impedance model to the integrated circuit design.