Patent Document ID: 8402399
Application ID: 13082440
Patent Status: 1

Claim One:
1. A Method for computing Fourier coefficients for a Fourier representation of a mask transmission function for the print simulation of a lithography mask used in the manufacture of lithography masks, said lithography masks having use in the manufacture of integrated circuits, the method comprising the steps of: sampling at least one polygon of a mask pattern of the lithography mask to obtain an indicator function defining said at least one polygon using a number of pixels; performing a Fourier Transform on said indicator function to obtain preliminary Fourier coefficients; and scaling said preliminary Fourier coefficients to obtain the Fourier coefficients for the Fourier representation of said mask transmission function, wherein said mask pattern comprises at least one tile, which in turn comprises said at least one polygon such that said at least one polygon is fully contained therein, wherein pixel size of said number of pixels is defined in at least one dimension, wherein said pixel size in said at least one dimension is obtained as i) a greatest common divider of tile size of said at least one tile in said at least one dimension and ii) coordinates of vertices of said at least one polygon in said at least one dimension, wherein at least one of the steps is carried out using a computer device.