Polymerizable Olefins Groups in Antimony EUV Photoresists

Many antimony-carboxylate complexes containing polymerizable olefins are highly sensitive EUV photoresists. Herein we report two approaches by which we explored the reactivity of polymerizable olefin antimony carboxylate photoresists to improve lithographic performance. First, we explored the effect of replacing three phenyl groups with methyl groups in an effort to increase the relative concentration of olefins vs. size of the molecule. Second, we explored the effect of increasing the number of polymerizable olefins from two to five. This approach examines the use of tris(4-vinylphenyl)antimony-dicarboxylate complexes as photoresists and the developer chemistry capable of patterning highly crosslinked substrates.