Positive resist compositions containing non-polymeric silicon
Acid-catalyzed positive resist compositions suitable for bilayer or multilayer lithographic applications are enabled by the use of a combination of (a) an acid-sensitive imaging polymer, (b) a radiation-sensitive acid generator, and (c) a non-polymeric silicon additive. The imaging polymer is preferably imageable with 193 nm or shorter wavelength imaging radiation. The resist compositions preferably contain at least about 5 wt. % silicon based on the weight of the imaging polymer. The compositions generally provide reduced line edge roughness compared to conventional silicon-containing resists.
International Business Machines Corporation
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Ranee Pushkara Rao Wenjie
Kwong Varanasi Li