Abstract
Eco-friendly step-and-flash imprint lithography was investigated for the future high-volume manufacture of biomicrochips. A nanoimprinted ultraviolet-curing liquid material with a lactulose derivative derived from medicinal drugs was found to have excellent UV curing properties, film shrinkage during a UV curing reaction, and good etch selectivity with a silicon-based middle layer in CF4 plasma treatment. 80 nm half-pitch lines of the nanoimprinted ultraviolet-curing liquid material with a lactulose derivative were resolved using the process conditions for a trilayer including a silicon-based middle layer with a high silicon concentration of 21.5 wt % and a novolac-based bottom layer on a 100 mm silicon wafer in step-and-flash imprint lithography.
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