Patent ID: 8802350

Claim:
A resist pattern-forming method comprising: applying a photoresist composition to a substrate to form a resist film; exposing the resist film by applying radiation to the resist film via a photomask; heating the exposed resist film; developing the heated resist film; and rinsing and drying the developed resist film to form a resist pattern made from the photoresist composition, wherein the photoresist composition comprises: a polymer that includes a structural unit shown by a formula (1); and a photoacid generator, wherein R 1 represents a hydrogen atom, a fluorine atom, a methyl group, or a trifluoromethyl group, Z represents a group that forms a divalent monoalicyclic group having 5 to 8 carbon atoms together with a carbon atom bonded to X, X represents an alkanediyl group having 1 to 6 carbon atoms, Y represents a hydrogen atom or —CR 2 R 3 (OR 4 ), and R 2 to R 4 independently represent a hydrogen atom or a monovalent hydrocarbon group, provided that R 3 and R 4 optionally bond to each other to form a cyclic ether structure together with a carbon atom bonded to R 3 and an oxygen atom bonded to R 4 .