Patent ID: 9459535
Filing Date: 2016-10-04
CPC Classification: G03F

Claim Text:
1. A method of forming a pattern comprising: a first pattern forming step in which a resist composition is applied to a substrate to form a resist film, and then the resist film is subjected to exposure and development, thereby forming a first pattern comprising the resist film; a film forming step in which a SiO an etching step in which the SiO a second pattern forming step in which the first pattern is removed, thereby forming a second pattern comprising the SiO the resist composition comprises a base component (A) which exhibits changed solubility in a developing solution by the action of an acid, an acid generator component (B) which generates the acid upon exposure, and a basic compound (D1) which has a cation moiety and an anion moiety selected from the group consisting of a sulfonate anion, a carboxylate anion and an alkylsulfonyl imide anion, and the base component (A) comprises a resin component (Al) consisting of a structural unit (a2) derived from an acrylate ester which has a hydrogen atom, a halogen atom, an alkyl group of 1 to 5 carbon atoms, a halogenated alkyl group of 1 to 5 carbon atoms or a hydroxyalkyl group bonded to the carbon atom at the α-position, the structural unit (a2) having a —SO wherein A′ represents an oxygen atom, a sulfur atom or an alkylene group of 1 to 5 carbon atoms which may contain an oxygen atom or a sulfur atom; z represents an integer of 0to 2; and R wherein R′ represents a hydrogen atom, an alkyl group, an alkoxy group, a halogen atom, a halogenated alkyl group, a hydroxy group, —COOR″, —OC(═O)R″, a hydroxyalkyl group, or a cyano group, wherein R″ represents a hydrogen atom or an alkyl group; s″ represents an integer of 0 to 2; A″ represents an oxygen atom, a sulfur atom or an alkylene group of 1 to 5 carbon atoms which may contain an oxygen atom or a sulfur atom; and m represents 0 or 1; wherein R represents a hydrogen atom, an alkyl group of 1 to 5 carbon atoms or a halogenated alkyl group of 1to 5carbon atoms; Y wherein R wherein the cation moiety of the basic compound (D1) is represented by R