Positive resist composition and patterning process
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsTsunehiro Nishi, Takeshi Kinsho, Masaki Ohashi, Koji Hasegawa, Masashi Iio
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Abstract
A positive resist composition comprises (A) a resin component which becomes soluble in an alkaline developer under the action of an acid and (B) an acid generator. The resin (A) is a polymer comprising recurring units containing a non-leaving hydroxyl group represented by formula (1) wherein R1 is H, methyl or trifluoromethyl, m is 1 or 2, and the hydroxyl group attaches to a tertiary carbon atom. The composition is improved in resolution when processed by lithography.
Claims6
A positive resist composition comprising (A) a resin component which becomes soluble in an alkaline developer under the action of an acid and (B) a compound capable of generating an acid in response to actinic light or radiation, wherein
- said resin component (A) is a polymer comprising recurring units containing a non-leaving hydroxyl group, represented by the general formula (1):
- wherein R1 is hydrogen, methyl or trifluoromethyl, and m is 1 or 2, with the proviso that the number “m” of hydroxyl groups each attach to a tertiary carbon atom.
Dependencies are inferred from the claim text.