Patent ID: 7631287

Claim:
A computer-implemented method for generating an edge deviation quantity, in which a desired pattern is compared with a finish pattern to be formed on a wafer, which is predicted from a design pattern, based on a calculation of a light beam intensity, and a deviation quantity of the finish pattern from the desired pattern at each of edges of the finish pattern and the desired pattern is calculated, the method comprising the steps, performed by a computer, of: setting a reference light beam intensity for setting the desired pattern on a wafer; setting an evaluation point for comparison of the finish pattern with the desired pattern; calculating a light beam intensity at the evaluation point; calculating a differentiation value of the light beam intensity at the evaluation point; dividing a difference between the light beam intensity at the evaluation point and the reference light beam intensity by the differentiation value, wherein a result of the division is defined as an edge deviation quantity of the finish pattern from the desired pattern; and outputting the edge deviation quantity.