Patent ID: 7103497
Filing Date: 2006-09-05
Classification: G03F

Abstract:
1. A position detection method of detecting a position of a mark, said method comprising steps of: detecting light from the mark under a first detecting condition to obtain a position of the mark as a first position; detecting light from the mark under a second detecting condition different from the first detecting condition to obtain a position of the mark as a second position; weighting the first and second positions with a coefficient and adding the weighted first and second positions to obtain a weighted position; and obtaining a conversion parameter for converting designed positions of a plurality of the mark into converted positions of the plurality of the mark based on the weighted positions of the plurality of the mark, and aligning the workpiece based on the obtained conversion parameter, wherein a value of the coefficient is previously obtained so as to minimize a difference between the weighted positions of the plurality of the mark and converted positions obtained by converting the designed positions of the plurality of the mark using the conversion parameter.