Patent ID: 9429846
Filing Date: 2016-08-30
CPC Classification: C08K,G03F

Claim Text:
1. A pattern forming process comprising the steps of: applying a resist composition comprising a polymer comprising recurring units having an acid labile group-substituted carboxyl group, an acid generator and an organic solvent onto a substrate, prebaking to form a resist film, exposing the resist film to high-energy radiation, baking the film, developing the exposed resist film in an organic solvent-based developer to form a negative pattern, applying a shrink agent onto the negative pattern, the shrink agent being a solution of a copolymer comprising recurring units having an α-trifluoromethylhydroxy and/or fluoroalkylsulfonamide group and recurring units having an acid labile group-substituted amino group in a solvent selected from the group consisting of ether solvents of 6 to 12 carbon atoms, alcohol solvents of 4 to 10 carbon atoms, hydrocarbon solvents of 6 to 12 carbon atoms, ester solvents of 6 to 16 carbon atoms, and ketone solvents of 7 to 16 carbon atoms, baking, and removing the excessive shrink agent for thereby shrinking the size of spaces in the pattern.