Competitive advantage of SOI from dynamic threshold shifts and reduced capacitance

We have described a model-based methodology for evaluating the floating body advantage of pd SOI in the context of a reference condition where the bulk model, with all components of Cj = 0, has the same values of Rsw and Ct as the corresponding SOI model, with all values of Cj = 0 and its bodies tied to their ip values. An example case shows a net advantage of order 10% that can be uniquely attributed to SOI's floating body topology. This advantage is a sensitive function of the internal SOI diffusion capacitance with considerable opportunity for further improvement.