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Environmentally Friendly Negative Resists Based on Acid‐Catalyzed Acetalization for 193‐nm Lithography
Author(s) -
Kim JinBaek,
Jang JiHyun,
Ko JongSung,
Choi JaeHak,
Lee KwanKu
Publication year - 2003
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200350032
Subject(s) - resist , acetal , catalysis , polymer , copolymer , polymer chemistry , materials science , lithography , methacrylate , chemical engineering , chemistry , organic chemistry , nanotechnology , composite material , optoelectronics , layer (electronics) , engineering
Novel water‐developable negative resists were designed to induce both crosslinking and polarity change upon exposure and bake. The matrix polymers were synthesized by copolymerization of glyceryl methacrylate and methacrolein. The acid‐catalyzed acetalization of the polymer induced crosslinking, polarity change, and an increase in dry‐etch resistance. The resist formulated with this polymer and cast in a water/ethanol mixture showed 0.7 μm line and space patterns using a mercury–xenon lamp in a contact printing mode and pure water as a developer.The acid‐catalyzed acetalization of poly(GMA‐ co ‐MA) to form the water‐insoluble acetal.