Signal Integrity Analysis of Modified Coplanar Waveguide Structure Using ADI-FDTD Method

Abstract

Very Large Scale Integration (VLSI) technology shrinks to Deep Sub Micron (DSM) geometries, interconnect is becoming a limiting factor in determining circuit performance. High speed interconnect suffers from signal integrity effects like crosstalk, and propagation delay thereby degrading the entire system operation. In order to reduce the adverse signal integrity effects, if is necessary for the interconnect to have accurate physical dimensions. The interconnection and packaging related issues are main factors that determine the number of circuits that can be integrated in a chip as well as the chip performance. In this paper, it is proposed to simulate high speed interconnect structures using Alternate Direction Implicit Finite-Difference Time-Domain Method (ADI-FDTD) method. The electrical parameters such as mutual inductance and mutual capacitance were calculated from E and H fields for Coplanar waveguide (CPW) and Stacked Grounded Coplanar waveguide (SGCPW).

Keywords: Interconnects, ADI-FDTD Method, Coplanar Waveguide, Crosstalk and Signal Integrity