Patent ID: 8647554
Filing Date: 2014-02-11
Classification: B29C,B82Y,G03F

Abstract:
1. In an imprint lithography system, a method comprising: depositing a plurality of drops of polymerizable imprint fluid on a substrate, the plurality of drops having a drop pattern in which each of the plurality of drops has an assigned size and position on the substrate; performing a first imprint of the plurality of drops of polymerizable imprint fluid by varying the distance between a mold and the substrate to define a desired volume therebetween filled by the imprint fluid and then solidifying the imprint fluid resulting in a first patterned imprinted layer having a residual layer; measuring a variation of thicknesses of sub-portions of the residual layer at a plurality of points; calculating a new drop pattern that compensates for nonuniformities in the thickness of the residual layer by adjusting the assigned size and position of certain ones of the plurality of drops; and performing a second imprint of a plurality of drops using the new drop pattern resulting in a second imprinted layer having a uniform residual layer thickness.