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Issue 12, 1994
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Photoresists based on a novel photorearrangement of o-nitrobenzylic polymers

Abstract

A new photosensitive dicarboxylic acid, isophthalimido bis(α-methylamino-2-nitro-4-toluic acid)(4) was synthesized and characterized. Copolymerization of the corresponding acid chloride with diamines gave polyamides having photo-sensitive o-nitrobenzylic chromophores at symmetrical positions of every repeating unit. Photolysis of the new poly-amides resulted an interesting photorearrangement leading to the formation of azo polymers with carboxylic acid groups at the ortho positions. The polarity difference induced by the photorearrangement brings about a solubility difference between the irradiated and unirradiated polymers, which renders them useful as positive photoresist materials.

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Article information


J. Mater. Chem., 1994,4, 1769-1773
Article type
Paper

Photoresists based on a novel photorearrangement of o-nitrobenzylic polymers

A. Ajayaghosh, M. V. George and T. Yamaoka, J. Mater. Chem., 1994, 4, 1769
DOI: 10.1039/JM9940401769

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