Abstract
Chromophore-functionalized copoly(2-oxazoline)s are successfully evaluated as bottom antireflective coatings (BARCs) in high-resolution photolithography. With respect to UV light sources used in photolithographic production routines, anthracene is chosen as a chromophore. For application as polymer in BARCs, the copolymer poly(2-ethyl-2-oxazolin)45-stat-poly(2-dec-9′-enyl-2-oxazolin)20-stat-poly(2-(3′-(1″-(anthracen-9-ylmethyl)-1″,2″,3″-triazol-4-yl)propyl)-2-oxazolin)35 can be synthesized by the Huisgen cycloaddition click reaction of the copolymer poly(2-ethyl-2-oxazolin)45-stat-poly(2-dec-9′-enyl-2-oxazolin)20-stat-poly(2-pent-4′-inyl-2-oxazolin)35 and the corresponding azide-functionalized anthracenes. These copolymers can be crosslinked by the thermally induced thiol-ene reaction involving the unsaturated C=C bonds of the poly(2-dec-9′-enyl-2-oxazoline) repetition units and a multifunctional thiol as crosslinker. Tests of this BARC in a clean room under production conditions reveal a significant decrease of the swing-curve of a chemically amplified positive photoresist by more than 50%, hence significantly increasing the resolution of the photoresist.
Original language | English |
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Pages (from-to) | 233-238 |
Number of pages | 6 |
Journal | Macromolecular Rapid Communications |
Volume | 37 |
Issue number | 3 |
DOIs | |
Publication status | Published - 1 Feb 2016 |
Bibliographical note
Publisher Copyright:© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Keywords
- absorption coefficient
- photolithography
- poly(2-oxazoline)s
- ring-opening polymerization