Patent ID: 7602962
Filing Date: 2009-10-13
Classification: G06K,G06T

Abstract:
1. A method of classifying defects, comprising the steps of: determining a sampling rate of defects to be reviewed by a second inspection machine, operable to detect images of defects to be reviewed with a first image magnification, among defects detected by a first inspection machine, operable to detect images of the defects with a second image magnification, the second image magnification being lower than the first image magnification; reviewing, with said second inspection machine, defects sampled from said defects detected by said first inspection machine in accordance with said determined sampling rate, the defects detected by said first inspection machine being captured with the lower second image magnification; and classifying, with said second inspection machine, said reviewed defects with a second defect classifier corresponding to said second inspection machine, the reviewed defects being captured with the higher first image magnification; wherein in the step of determining, said sampling rate is determined for each defect class classified by a first defect classifier corresponding to said first inspection machine to reduce a number of defects to be reviewed by the second inspection machine among the defects detected by the first inspection machine.