Patent ID: 9740105
Date: 2017-08-22
CPC Classifications: G03F

Claim:
1. A resist pattern formation method comprising: forming a resist film on a support by using a resist composition, containing a base material component (A) whose solubility in the developing solution changes by the action of an acid, the base material component (A) containing a high-molecular compound (A1) having a constituent unit (a0) represented by the following general formula (a0-1), a constituent unit (a1) containing an acid decomposable group whose polarity increases by the action of an acid, and a constituent unit (a2) containing a group represented by the following general formula (a2-r-1); wherein R represents a hydrogen atom, an alkyl group having from 1 to 5 carbon atoms, or a halogenated alkyl group having from 1 to 5 carbon atoms; Ra 01 represents an —SO 2 -containing polycyclic ring, and the —SO 2 -containing polycyclic ring is directly bonded to an oxygen atom of the ester bond of the general formula (a0-1); each of Ra′ 21 s independently represents a hydrogen atom, an alkyl group, an alkoxy group, a halogen atom, a halogenated alkyl group, a hydroxyl group, —COOR″, —OC(═O)R″, a hydroxyalkyl group, or a cyano group; R″ represents a hydrogen atom or an alkyl group; n′ represents an integer of from 0 to 2; and * represents a valence bond; exposing the resist film; developing the resist film; and after developing the resist film, performing a rinse treatment using a nonionic surfactant aqueous solution, wherein the nonionic surfactant is represented by the following formula: wherein R n represents a linear or branched alkyl group having from 8 to 30 carbon atoms; PO represents an oxypropylene group; EO represents an oxyethylene group; x is from 5 to 15; and y is from 3 to 15.