Impact of Chuck Boundary Conditions on Wideband On-Wafer Measurements

While a lot of investigations have been presented recently explaining the parasitic effects in on-wafer measurements caused by probes, neighborhood and environmental effects, this paper addresses the impact of chuck boundary conditions. Starting from a coplanar waveguide (CPW) measurement example, this paper demonstrates how the most relevant chuck parameters, i.e. thickness and relative permittivity, deteriorate the S-parameters of CPWs.