ROLL-TO-ROLL-IMPRINTING
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United States of America Patent
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Issued Date -
Dec 14, 2023
app pub date -
Oct 19, 2021
filing date -
Oct 21, 2020
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Abstract
The present invention relates to roll-to-roll surface patterning by imprint method. A film of liquid phase resist is coated on a running web and subsequently brought into contact with a rolling replication tool with patterned features on its outer surface. In a simultaneous step, resist is 5 cured typically by heat or UV-light and patterned features on the rolling replication tool are replicated into the resist film during the contact with the replication tool. A major deficiency of conventional roll-to-roll imprinting is the generation of defects in the patterns due to trapped air. To overcome this limitation, the present invention describes a method and 10 apparatus to perform roll-to-roll imprinting under reduced-pressure or vacuum conditions.
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