Patent ID: 8728713

Claim:
A method for producing a completed measurement structure using (i) a first exposure tool having a first maximum expose field, (ii) a second exposure tool having a second maximum expose field larger than the first maximum expose field, (iii) a first mask defining one or more unit-cell patterns and one or more first-alignment-feature patterns proximate the one or more unit-cell patterns, and (iv) a second mask defining a periphery pattern for at least partially surrounding a plurality of the unit-cell patterns and, proximate the periphery pattern, one or more second-alignment-feature patterns, the method comprising: utilizing the first exposure tool, exposing a layer of photosensitive material through the first mask in a plurality of different locations such that, after the first exposure, each subsequent exposure exposes, a) in the layer of photosensitive material, one of the unit-cell patterns abutting at least one of the previous unit-cell patterns thereby forming an abutting field pattern in the layer of photosensitive material and exposes, b) in the layer of photosensitive material, one of the first-alignment-feature patterns overlapping at least one of the previous first-alignment-feature patterns, thereby forming a partially complete measurement structure in the layer of photosensitive material; utilizing the second exposure tool, exposing the layer of photosensitive material through the second mask to form the periphery pattern in the layer of photosensitive material at least partially surrounding the abutting field pattern, the exposure through the second mask exposing one of the second-alignment-feature patterns to overlap the at least two overlapping first-alignment-feature patterns; and developing the layer of photosensitive material to remove a portion thereof, wherein unremoved portions of the layer of photosensitive material where the second-alignment-feature pattern overlapped the at least two overlapping first-alignment-feature patterns defines the completed measurement structure.