Patent ID: 9355440
Filing Date: 2016-05-31
CPC Classification: G01N,G06K,G06T

Claim Text:
1. A computer-implemented method for detecting defects on a substrate, comprising: applying a spatial filter algorithm to inspection data acquired across an area on the substrate to determine a first portion of the inspection data that has a higher probability of being a selected type of defect than a second portion of the inspection data, wherein the selected type of defect comprises a non-point defect, wherein the inspection data comprises inspection data generated by combining two or more raw inspection data corresponding to the same locations on the substrate, and wherein the raw inspection data that is combined is data acquired by inspection of the substrate that has not been processed to alter a signal-to-noise ratio of the data; generating a two-dimensional map illustrating the first portion of the inspection data; searching the two-dimensional map for an event that has spatial characteristics that match spatial characteristics of the selected type of defect; and determining if the event corresponds to a defect having the selected type, wherein said applying, said generating, said searching, and said determining are performed using a computer system.