Patent ID: 9696625
Date: 2017-07-04
CPC Classifications: C08F,G03F,H01L

Claim:
1. A method of forming a resist pattern, comprising: applying a resist composition to a substrate to form a resist film; exposing the resist film; developing the exposed resist film to form a first resist pattern on the substrate; applying a basic composition to cover the first resist pattern, neutralizing a base contained in the basic composition and the first resist pattern to form a developing solution insoluble region on a surface of the first resist pattern; and developing the covered first resist pattern, the basic composition comprising a basic component, and the basic component comprising a block copolymer containing a block chain (b1) comprising a structural unit (x0) represented by general formula (x0-1) shown below and a block chain (b2) having a styrene skeleton, wherein the molar ratio of the structural unit comprising the block chain (b1)/structural unit comprising the block chain (b2)=1/99 to less than 10/90: wherein R represents a hydrogen atom, an alkyl group of 1 to 5 carbon atoms or a halogenated alkyl group of 1 to 5 carbon atoms; Vx 01 represents a divalent hydrocarbon group having an ether bond or an amide bond, a divalent aromatic hydrocarbon group, or a single bond; Yx 01 represents a single bond or a divalent linking group; and Rx′ represents a substituent having a nitrogen atom.