Patent ID: 8090190
Filing Date: 2012-01-03
Classification: G06T

Abstract:
1. A method of reviewing defects using an inspection apparatus including a scanning electron microscope, a detector for detecting secondary electrons generated from primary electrons reflected from a sample, a digitizing means for digitizing a signal corresponding to the detected secondary electrons, an image processing unit for processing acquired images, a recipe unit for storing a plurality of recipes, and a whole control unit for performing automatic defect review and classification, the method comprising the steps of: irradiating a sample with a scanning electron microscope; acquiring an image of an area on the sample including a defect with a first magnification by using position information of the defect which is acquired using the inspection apparatus; performing, using a CPU, a first-extraction of the defect by comparing the acquired image of the area on the sample including the defect with the first magnification to a reference image having the first magnification; acquiring, using the CPU, an image of an area on the sample including the extracted defect with a second magnification; performing, using the CPU, a second-extraction of the defect by comparing the acquired image of the area on the sample including the defect with the second magnification to a reference image having the second magnification; classifying, using a defect classifying function section of the CPU, the defect extracted by second-extracting step; and performing an estimation step, wherein: