Patent ID: 6091845
Filing Date: 2000-07-18
Classification: G01N,G03F,G06T

Abstract:
A method of inspecting a mask, comprising:acquiring mask image data from the mask;modifying the acquired mask image data according to characteristics of resist material at different deposition elevations and producing therefrom acquired mask elevation image data, wherein the modification includes:applying a first common elevation to a mask area of the acquired mask image data;applying a second elevation to an unmasked area of the acquired mask image data; andinterpolating an edge between the mask area and the unmask area of the acquired mask image data at the first common elevation;generating a first image simulation of the acquired mask elevation image data;acquiring image pattern data from a pattern used for forming the mask;generating a second image simulation of the acquired image pattern data; andcomparing the first and second image simulations for a defect.