Patent Document ID: 9811006
Application ID: 15111763
Patent Status: 1

Claim One:
1. A method of determining a measurement subset of metrology point locations, the measurement subset comprising a subset of potential metrology point locations on a substrate, and the method comprising: identifying a plurality of candidate metrology point locations from the potential metrology point locations; evaluating for each of the candidate metrology point locations, a change in the level of informativity imparted by the measurement subset of metrology point locations which is attributable to the inclusion of that candidate metrology point location into the measurement subset of metrology point locations; and selecting for inclusion into the measurement subset of metrology point locations, those one or more candidate metrology point locations which have the greatest increase in the level of informativity attributed thereto, wherein an exclusion zone is defined in the vicinity of each of the metrology point locations selected for inclusion into the measurement subset of metrology point locations, and the candidate metrology point locations comprise only potential metrology point locations located outside of these exclusion zones.