High contact angle fluorosulfonamide-based materials for immersion lithography

Fluoroalcohol-containing materials have found considerable use in 193 nm immersion topcoat and topcoat-free immersion resist materials due to their good water contact angles and base-dissolution properties. Trifluoromethanesulfonamide-containing materials are another alternative which have been explored for use in 193 nm photoresist and immersion topcoat applications; however, fluorosulfonamide materials have suffered from issues such as low water contact angles. In this paper, we report the synthesis of a series of fluorosulfonamide-containing methacrylate materials with water contact angle and base dissolution performance that rivals or exceeds that of comparable fluoroalcohol-based materials. © 2010 Copyright SPIE - The International Society for Optical Engineering.