Patent ID: 9430743
Filing Date: 2016-08-30
CPC Classification: G06N,G06T

Claim Text:
1. A computer-implemented method for classifying defects detected on a wafer, comprising: acquiring a training set of data for defects detected on a training wafer and defect classifications determined for the defects in the training set; performing two or more defect classification processes by inputting the training set of data into two or more defect classifiers; comparing defect classification results produced by the two or more defect classifiers to the defect classifications determined for the defects in the training set; determining one or more characteristics of one or more bins in the two or more defect classifiers based on results of said comparing; assigning a rank to the one or more bins in the two or more defect classifiers based on the determined one or more characteristics; selecting at least two of the two or more defect classifiers to be included in a composite defect classifier based on the rank assigned to the one or more bins; acquiring inspection results for the wafer using an inspection system, wherein the inspection results comprise information for defects detected on the wafer; and classifying the defects detected on the wafer by inputting the information for the defects detected on the wafer into each of the at least two defect classifiers selected to be included in the composite defect classifier and, for at least one of the defects that is assigned to two or more bins in the composite defect classifier, determining a bin for the at least one of the defects based on the rank assigned to the two or more bins, wherein said acquiring the training set, said performing, said comparing, said determining, said assigning, said selecting, said acquiring the inspection results, and said classifying are performed by a computer system.