Patent ID: 6151120
Filing Date: 2000-11-21
Classification: G03F

Abstract:
An exposure apparatus for aligning a wafer and mask, and transferring a pattern on the mask onto the wafer, said apparatus comprising:a wafer stage for mounting a wafer formed with a first alignment mark;a mask holder for holding a mask formed with a second alignment mark at a position outside an exposure field angle;a detection unit for optically detecting a positional deviation between the first and second alignment marks;a calculation unit for calculating a positional deviation between a first pattern formed on the wafer and a second pattern formed on the mask on the basis of a detection result of said detection unit, a position of the first alignment mark in the wafer, and a position of the second alignment mark in the mask; andan actuator for adjusting a positional relationship between the wafer and mask on the basis of a calculation result of said calculation unit to make the first and second patterns overlap each other.