Patent ID: 8306312
Filing Date: 2012-11-06
Classification: G01N,G06K

Abstract:
1. A visual inspection method, comprising the steps of: a collection step of detecting a large number of defect candidates as review defects by using images acquired by imaging a sample substrate, calculating feature quantities of the large number of defect candidates detected by the detecting and storing the calculated feature quantities of the detected defect candidates; a defect sampling step of sampling the review defects among the large number of defect candidates based on the collected features of each defect candidates over the large number of defect candidates detected in the collection step a review step of distinguishing at least whether a defect candidate is a defect or not to a plurality of review defects by reviewing the review defects sampled in the defect sampling step; a defect classifying condition determining step of determining a defect classifying condition from the result of distinguishing whether the defect candidate is a defect or not to a plurality of review defects at the review step.