Abstract

In this paper, we introduce an anti-adhesion poly(dimethylsiloxane) (PDMS)-coatedflexible mold and its applications for room-temperature imprint lithography. The flexiblemold is fabricated using an ultraviolet-curable prepolymer on a flexible substrate, and itssurface is passivated with a thin layer of PDMS to impart an anti-adhesion property. Thehighly flexible mold enables conformal contact with a substrate on which a low-viscositypolymer resist is spin-cast in a thin layer. Large-area imprinting is then realized at roomtemperature under significantly reduced pressure. The mold was durable even afterrepetitive imprinting of over 200 times. Also, we show a double imprinting on the substratewith a PDMS-coated replica polymeric mold having 500 nm line patterns. This enablesthe formation of matrix patterns with varying feature heights in less than 7 min.

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