Patent ID: 8029947

Claim:
A method of manufacturing a reticle for use in a photolithography tool, comprising: providing a reticle substrate having a pattern area and a perimeter region outside of the pattern area, the perimeter region having a first, unpatterned area and a second area having alignment marks, wherein the first, unpatterned area is distinct from the second area, and wherein the perimeter region is bounded by the pattern area and by an edge of the reticle substrate; obtaining qualitative data from within (a) the pattern area and (b) the first, unpatterned area distinct from the second area of the perimeter region, the data being indicative of physical characteristics of the reticle substrate within the pattern area, wherein the qualitative data is obtained remotely from the photolithography tool; and determining a correction model based at least in part on the qualitative data to apply to the photolithography tool.