Patent ID: 8918743
Filing Date: 2014-12-23
Classification: G03F

Abstract:
1. A computer-implemented method of performing mask topography effect modeling on a mask design layout, the method comprising: applying, using a computing device, a thin mask model to the mask design layout to create a thin mask transmission; applying a thick mask model to the mask design layout, the thick mask model comprising a plurality of edge-based kernels; applying a rasterization filter to the plurality of edge-based kernels to generate a plurality of filtered kernels, the applying of the thick mask model comprising applying the plurality of filtered kernels to edges in the mask design layout to produce a mask 3D residual; and combining the thin mask transmission and the mask 3D residual to create a mask 3D transmission, wherein the mask topography effect modeling on the mask design layout is used to create an improved optical mask for creating an integrated circuit.