Patent ID: 7717696

Claim:
An apparatus for performing double-sided imprint lithography on a substrate having an axial aperture and first and second moldable major surfaces comprising: first and second molds, each mold having an axial aperture, and a molding surface for imprinting a pattern on a moldable surface; an assembly support for supporting an assembly comprising the first mold, the substrate and the second mold, wherein the molding surfaces of the first and second molds are disposed adjacent to said respective first and second moldable major surfaces of the substrate; an alignment mechanism coupled to the assembly support, said alignment mechanism including a spindle having an alignment axis and containing at least one set of symmetrically positioned and radially-movable elements disposed in a common plane perpendicular to said alignment axis for axially aligning the apertures of the molds and the substrate about said alignment axis so that the patterns of the molds are in registration; a drive mechanism configured to engage each set of radially-movable elements within said spindle of said alignment mechanism, said drive mechanism configured to alter at least a radial position of each of said elements in said set within said common plane; and means for pressing the molding surfaces into the respective adjacent moldable surfaces.