Patent ID: 7312873

Claim:
A method of aligning an object, comprising steps of: detecting an image of a mark on the object with respect to each of a plurality of areas on the object; obtaining a position of the mark based on the detected image with respect to each image detected in said detecting step; extracting a feature of the mark based on the detected image with respect to each image detected in said detecting step; determining a correction value based on previously prepared information to relate the extracted feature to the correction value, with respect to each position obtained in said obtaining step, the correction value being a value to be subtracted from a position obtained in said obtaining step; correcting a position obtained in said obtaining step by subtracting the correction value from the position obtained in said obtaining step with respect to each position obtained in said obtaining step; calculating a position of each of the plurality of areas based on positions corrected in said correcting step; and aligning the object based on a position of each of the plurality of areas calculated in said calculating step.