Full-wave investigation on the curved bonding wire interconnection by using a suitable FDTD code

The scattering parameters of the curved bonding wire interconnection, accounting for its curvature, have been computed by using a proper discretization technique along with the Finite Difference Time Domain (FDTD) method. The curvature has been modeled assuming a polygonal approximation. The obtained results have been compared against vector network analyzer measurements showing a satisfactory agreement. In order to investigate the curvature effect, the proposed approach has been compared with a rectangular approximation of the bonding wire demonstrating that this approximation provides a useful modeling of the interconnection.