Patent ID: 8139847

Claim:
A defect inspection tool, comprising: an image obtaining unit for obtaining an image by applying an electron beam or a light to a specimen; an image processing unit for performing a calculation process by using a plurality of predetermined inspection parameter groups for the image obtained by the image obtaining unit to output a plurality of defect detection images; a display unit for displaying a plurality of defect detection images as a list outputted by the image processing unit; an input unit for a user to select a defect detection image through appropriate defect detection from the displayed list of defect detection images displayed; a parameter group range determining unit for determining an effective inspection parameter group range on the basis of a first defect detection area which is included in the defect detection image selectively inputted at the input unit and a second defect detection area which is included in each defect detection image displayed in the list; and a parameter tuning unit for narrowing down the inspection parameter group range for a plurality of images obtained by the image obtaining unit by using a plurality of effective inspection parameter group ranges and storing the narrowed inspection parameter group range.