Patent ID: 9360776
Filing Date: 2016-06-07
CPC Classification: G03F,H01L

Claim Text:
1. An alignment correction method for a substrate to be exposed, which corrects alignment of a subsequent substrate to be exposed based on an alignment deviation of a previously exposed substrate to be exposed, in a process of exposing successively substrates to be exposed that are being scanned in a scanning direction by a scanning device, the method comprising the steps of: detecting coordinates of a first observation point and a second observation point set in advance on a substrate to be exposed that is being scanned in the scanning direction, so as to observe an alignment deviation of the substrate to be exposed; computing a correction amount based on a deviation between the detected coordinates and a reference line set in advance according to the first observation point and the second observation point; and correcting alignment of a subsequent substrate to be exposed based on the computed correction amount.