Patent ID: 7852477

Claim:
A method of exposing a substrate with an exposure apparatus, said method comprising: a storing step of storing in a memory, plural sets, each of which is a combination of a set focus amount, a set exposure dose, and first image information of a pattern formed on the substrate through an exposure with the set focus amount and the set exposure dose, the plural sets having different focus amounts or different exposure doses or both the different focus amounts and the different exposure doses; an obtaining step of obtaining second image information of a pattern formed on the substrate through another exposure; a selecting step of finding a correlation value between the second image information obtained in the obtaining step and the first image information in the plural sets stored in the storing step, and of selecting at least two sets having two highest correlation values among the plural sets; and a calculating step of calculating the correction amount using the focus amounts or the exposure doses in the at least two sets selected in the selecting step; and an exposure step of exposing the substrate using the correction amount calculated in the calculating step.