Patent Document ID: 20120296576
Application ID: 13521086
Patent Flag: 0

Claim One:
1. A defect inspection device comprising: irradiating unit which simultaneously irradiates different regions on a sample with illumination light under different optical conditions, on the surface of the sample patterns are repeatedly formed which are essentially having the same shape in design; detection unit which detects, for each of the different regions, light reflected from each region simultaneously irradiated with the illumination light under the different optical conditions by the irradiating unit; defect candidate extraction unit which extracts defect candidates under the different optical conditions for each of the different regions, by processing detection signals corresponding to the reflected light detected for each different region by the detection unit; defect extraction unit which extracts defects by integrating the defect candidates extracted under the different optical conditions for each different region by the defect candidate extraction unit; and defect classifying unit which classifies feature quantities of the defects extracted by the defect extraction unit and classifying the defects according to the calculated feature quantities.