Patent Document ID: 8107051
Application ID: 11949264
Patent Status: 1

Claim One:
1. An exposure apparatus for exposing each of a plurality of regions arranged on a substrate, the apparatus comprising: a measurement device configured to acquire an image signal of an alignment mark formed with respect to the shot region and to measure a shift amount of a position of the alignment mark from a designed position thereof based on the signal; and a processor configured to: i) cause the measurement device to measure the shift amount with respect to each of at least two shot regions of the plurality of shot regions, under a plurality of measurement conditions, ii) calculate a feature value of the signal acquired with respect to each of the at least two shot regions under each of the plurality of measurement conditions, iii) calculate, with respect to each of the plurality of measurement conditions, a coefficient of a transformation equation which respectively transforms coordinates of designed positions of the alignment marks to values that approximate values each of which is obtained with a sum of the calculated feature value and one of the designed positions corresponding thereto, wherein the transformation equation is formulated from a coordinate transformation equation which is used to obtain a position of each of the plurality of shot regions, and respectively transforms the coordinates of the designed positions to values that respectively approximate coordinates of measured positions of the alignment marks each of which is obtained with a sum of the measured shift amount and one of the designed positions corresponding thereto with respect to each of the at least two shot regions, by replacing the measured shift amount with the calculated feature value corresponding thereto, and iv) set a measurement condition, under which the measurement device measures the shift amount, based on the coefficient calculated with respect to each of the plurality of measurement conditions.