SPECTRAL-DOMAIN TECHNIQUE USING SURFACE-WAVE EXCITATION FOR THE ANALYSIS OF INTERCONNECTS

Analysis of interconnects is an area of prime importance in packaging since the characteristics of the interconnections eventually dictate t he performance of the package. The analysis consists of two parts, nam ely, parameter extraction and package simulation where the former repr esents the computation of the line parameters such as resistance, indu ctance, capacitance, and conductance (R, L, C, G). At high frequencies , the line parameters vary with frequency which requires a complete so lution to Maxwell's equation for parameter extraction. This translates to the computation of the propagation constant as a function of frequ ency (beta(omega)) which is the focus of the work in this paper. Since packages typically consist of periodic structures, the spectral domai n technique (SDT) lends itself to easy analysis and has therefore been used in this paper. A new method utilizing the surface wave excitatio n principle applied to the scattering problem has been used to compute beta(omega) which is different from the eigenvalue solution that has been used in the past. Using the present formulation, a single algorit hm can be used both for the computation of wave propagation and scatte ring/radiation by changing the angle of the incident wave.