Patent ID: 7840390
Filing Date: 2010-11-23
Classification: G03F

Abstract:
1. A method of creating a simulation model, comprising: acquiring, by a computer, a CD value of a photoresist pattern actually formed based upon a test pattern; acquiring, by the computer, information about a shape of the photoresist pattern; acquiring, by the computer, an intensity distribution of an optical image based upon the test pattern by performing simulation; acquiring, by the computer, an empirical threshold defined according to a CD value on the intensity distribution, which corresponds to the CD value of the photoresist pattern; acquiring, by the computer, a parameter of the optical image based upon the intensity distribution of the optical image; acquiring, by the computer, a first correlation between the information about the shape of the photoresist pattern and the parameter of the optical image; acquiring, by the computer, a second correlation between the information about the shape of the photoresist pattern and the empirical threshold; and acquiring, by the computer, a third correlation between the parameter of the optical image and the empirical threshold by using the first correlation and the second correlation.