Invention Grant
US09025148B2 Alignment mark, substrate, set of patterning devices, and device manufacturing method 有权
对准标记,基板,图案形成装置组以及装置制造方法

Alignment mark, substrate, set of patterning devices, and device manufacturing method
Abstract:
An alignment mark determines alignment of a first and a second exposure on a substrate on a macro level and a micro level. The alignment mark includes a first alignment pattern projected during the first exposure and a second alignment pattern projected during the second exposure. The alignment mark includes a first sub-mark at least partially defined by the first alignment pattern and a second sub-mark at least partially defined by the second alignment pattern. Relative positions of the first and second sub-marks on the substrate are representative for alignment of the first and second exposures on the macro level. At least one sub-mark is defined by image lines of the first alignment pattern and the second alignment pattern, and wherein relative positions of image lines of the first alignment pattern and image lines of the second alignment pattern of the at least one sub-mark are representative for alignment of the first and second exposures on the micro level.
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