Synopsys has completed the acquisition of Sigma-C Software AG, a Munich-based company providing simulation software that allows to develop and optimize process sequences for optical lithography, e-beam lithography and next-generation lithography (NGL) technologies. Synopsys acquired SIGMA-C in an all-cash transaction for $20.5 million. Sigma-C products are a complement to Synopsys' DFM and TCAD solutions with SOLID+ providing analysis of variability within the lithography process on design layout in the DFM flow, and SOLID E providing accurate lithography models for optimizing the lithography process.