Patent ID: 9645488
Date: 2017-05-09
CPC Classifications: G03F

Claim:
1. A position measuring method comprising: preparing a mask including a plurality of first patterns to be transferred to a subject and a plurality of second patterns which are positioning measuring patterns, each position measuring pattern being formed in a region surrounding the region where the plurality of first patterns are formed and also formed in another region where a pattern to be inspected is formed in the mask, the plurality of first patterns being geometrical patterns to be transferred to the subject; measuring position coordinates of the plurality of second patterns with a position measuring apparatus; measuring position coordinates of the plurality of second patterns with an inspection system; generating first position correction data based on the position coordinates of the plurality of second patterns measured with the inspection system; obtaining a difference between the position coordinates of the plurality of second patterns measured with the position measuring apparatus and the position coordinates of the plurality of second patterns measured with the inspection system; correcting the first position correction data using the obtained difference; generating second position correction data from the corrected first position correction data; acquiring an optical image including the position coordinates of the plurality of first patterns and the position coordinates of the plurality of second patterns; and correcting the position coordinates of the plurality of first patterns of the optical image using a difference between the position coordinates of the plurality of second patterns of the optical image and the position coordinates of the plurality of second patterns based on the second position correction data.