Patent ID: 7648885
Filing Date: 2010-01-19
Classification: G03F,H01L

Abstract:
1. A method for forming a misalignment inspection mark, the method comprising: forming, in a reference layer, a reference layer device pattern and at least one first mark present on the same layer as that of the reference layer device pattern; forming an overlying layer device pattern and at least one second mark area in a layer over the reference layer adjacent to the at least one first mark, the overlying layer device pattern corresponding to the reference layer, the second mark area being present in the same layer as that of the overlying layer device pattern and including an arrangement of a plurality of first mark patterns having a line width, a pitch, and a pattern density at least one of which is equivalent to that of the overlying layer device pattern, wherein the first mark patterns comprises a plurality of first patterns arranged at ends of the second mark area and a plurality of second patterns; and removing the first patterns and using the second patterns to form at least one second mark.