Patent ID: 7954073
Filing Date: 2011-05-31
Classification: G03F

Abstract:
1. A computer-implemented method of arranging mask patterns, the method comprising: obtaining a distribution of functions h(ξ−x) representing the contribution of an assist feature to image intensity on a main feature, wherein x is the position of the main feature and ξ is the position of the assist feature, wherein (ξ−x) represents displacement between the main feature and the assist feature, and wherein the distribution of the functions h(ξ−x) satisfy where I(x) is an image intensity on the main feature when the assist feature is present, I discretizing neighboring regions of the main feature into finite regions and discretizing the distribution of the functions h(ξ−x) into the finite regions to generate a distribution of discretized values ĥ(x,ξ) consisting of ĥ generating from the distribution of discretized values ĥ(x,ξ) a distribution of representative values determining a position of the assist feature by using polygonal regions having the same generating, by a computer, a mask pattern using the determined position of the assist feature.