Patent ID: 9052604
Filing Date: 2015-06-09
Classification: G03F

Abstract:
1. A method for correcting alignment errors in a photolithography system, the method comprising: detecting a first alignment error at a first location of a first micro electronic substrate; detecting a second alignment error at a second location of a second microelectronic substrate, the second location corresponding to the first location; deriving a statistical dispersion between the first alignment error and the second alignment error; comparing the statistical dispersion, using a controller, to a predetermined threshold at the first location; comparing the statistical dispersion, using a controller, to the predetermined threshold at the second location; associating the first location with a first alignment calculation based on the comparison at the first location; associating the second location with a second alignment calculation based on the comparison at the second location, wherein the second alignment calculation is different than the first alignment calculation; and wherein the first alignment calculation is a linear alignment calculation and the second alignment calculation is a zone alignment calculation.