Patent Document ID: 10062157
Application ID: 15342432
Patent Status: 1

Claim One:
1. A method of determining a structure or process parameter value of a target of interest on a sample, the method comprising: defining a plurality of collection patterns for a spatial light beam controller positioned at a pupil image plane of a metrology tool so that the defined collection patterns are selected from a plurality of possible collection patterns as being most sensitive to process variability for fabricating structures on the target of interest; for each collection pattern, collecting a signal from a sensor of the metrology tool, wherein each collected signal represents a combination of a plurality of signals that the spatial light beam controller samples, using each collection pattern, from a pupil image of the target of interest, wherein the collection patterns are selected so that the pupil is reconstructable based on the collection patterns and their corresponding collection signals; and analyzing the collected signal for each of the collection patterns to determine a structure or process parameter value for the target of interest.