Patent ID: 6667806
Filing Date: 2003-12-23
Classification: G03F,H01L

Abstract:
A process for manufacturing a semiconductor device comprising the steps of:forming a first pattern on a substrate; forming a second pattern on said first pattern; detecting a first image by irradiating said substrate on which said first and second patterns are formed, with illuminating light having a first wavelength; detecting a second image by irradiating said substrate on which said first and second patterns are formed, with illuminating light having a second wavelength; calculating a relative positional difference between said first and second images; calculating a positional difference of said second pattern relative to said first pattern from a calculated result of the relative positional difference between said first and second images by using a relationship between the relative positional difference between the first and second images and the positional difference of said second pattern relative to said first pattern; and feeding back said calculated positional difference to an exposing apparatus for forming said second pattern in a next process as a correction value.