Invention Grant
US09024456B2 Photolithography alignment mark, mask and semiconductor wafer containing the same mark 有权
光刻对准标记,掩模和含有相同标记的半导体晶片

Photolithography alignment mark, mask and semiconductor wafer containing the same mark
Abstract:
A photolithography alignment mark and a mask and semiconductor wafer containing said mark are described. The alignment mark comprises: a plurality of first alignment lines arranged parallel with each other in a first direction; a plurality of second alignment lines arranged parallel with each other in a second direction perpendicular to the first direction, and wherein each of the plurality of first alignment lines is composed of a predetermined number of first fine alignment lines uniformly spaced from each other, and each of the plurality of second alignment lines is composed of a predetermined number of second fine alignment lines uniformly spaced from each other. Alignment marks can be located in non-circuit pattern regions of the mask and on a plurality of layers in mark regions on the wafer.
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