Patent ID: 7245351
Filing Date: 2007-07-17
Classification: G03F

Abstract:
1. An alignment mark for the coarse alignment and fine alignment of a semiconductor wafer in an exposure tool, comprising: a first partial structure for generating a first reflection pattern in the exposure tool for the fine alignment of the semiconductor wafer, the first partial structure comprising a plurality of first structure elements arranged in a plurality of groups, within each group, the first structure elements being arranged relatively parallel and in a manner lying next to one another with a predetermined distance between midpoints, the plurality of groups being arranged symmetrically around the center of an inner region; and a second partial structure for generating a second reflection pattern in the exposure tool for the coarse alignment of the semiconductor wafer, the second partial structure comprising a plurality of second structure elements, the second structure elements of the second partial structure being formed in a manner corresponding to a pattern stored in the exposure tool and being arranged in the inner region, wherein the second structure elements of the second partial structure further comprise two lines that intersect each other to form a structure of a cross that has a midpoint lying in the center of the inner region.