Patent ID: 9354048
Filing Date: 2016-05-31
CPC Classification: G01B,G03F

Claim Text:
1. A method of measuring a substrate comprising first and second marker structures, the first marker structure predetermining a substrate coordinate system, the method comprising: using a position measurement system to align a position of the first marker structure to align the substrate coordinate system relative to the position measurement system; predetermining an alignment data record with intended position data of the second marker structure, the intended position data being relative to the substrate coordinate system; using the position measurement system to measure actual position data of the second marker structure in the substrate coordinate system; and establishing a transformation of the substrate coordinate system into a transformed substrate coordinate system to reduce deviations between the actual position data of the second marker structure and the intended position data of the second marker structure, wherein the substrate comprises an object selected from the group consisting of a lithography mask and a lithography mask blank.