Patent ID: 6356343
Filing Date: 2002-03-12
Classification: G03F

Abstract:
An exposure method comprising the steps of:preparing an orthogonal coordinate system including first and second axes perpendicular to each other; placing an object with a mark in said orthogonal coordinate system, said mark including a first pattern comprising a plurality of bar-like patterns spaced from each other at predetermined intervals in said first axis direction and extending with longer continuity in said second axis direction than in said first axis direction, and second patterns disposed near both sides of said first pattern in said second axis direction and comprising a plurality of bar-like patterns spaced from each other at predetermined intervals in said second axis direction and extending with longer continuity in said first axis direction than in said second axis direction; directing a detection beam to said mark; detecting the detection beam reflected from said mark through a detecting optical system, said first pattern of said mark being detected though a portion where aberrations of the detecting optical system are minimized; attaining information with respect to the position of said object based on said detection beam; and determining the position of said object with respect to said first and second axes based on said information.