Patent ID: 7057715
Filing Date: 2006-06-06
Classification: G03F,H01J

Abstract:
1. A test pattern comprising: a plurality of feature patterns; a plurality of horizontal line patterns; and a plurality of vertical line patterns, wherein the feature patterns are interleaved with the horizontal line patterns and the vertical line patterns such that substantially all of a vertical area of the test pattern intersects at least one horizontal line pattern and substantially all of a horizontal area of the test pattern intersects at least one vertical line pattern, and wherein each horizontal line pattern and each vertical line pattern includes a plurality of sets of lines, wherein each set of lines includes a plurality of lines and each line in a set of lines has an identical line width and is separated from an adjacent line by a space having a space width, and wherein the line width and the space width for the plurality of sets of lines varies from less than a nominal resolution limit of a lithography tool to greater than the nominal resolution limit.