Patent ID: 11709429

Abstract:
A composition for forming an organic film contains a polymer having a repeating unit shown by formula (1A) as a partial structure, and an organic solvent, where AR1 and AR2 represent a benzene ring or naphthalene ring optionally with a substituent; W1 represents any in formula (1B), and the polymer optionally contains two or more kinds of W1; W2 represents a divalent organic group having 1 to 80 carbon atoms; R1 represents a monovalent organic group having 1 to 10 carbon atoms and an unsaturated bond; and R2 represents a monovalent organic group having 6 to 20 carbon atoms and one or more aromatic rings. This invention provides: an organic film composition which enables excellent film formability, high etching resistance, and excellent twisting resistance without impairing the resin-derived carbon content, and which contains less outgassing-causing sublimation component; a patterning process using the composition; and a polymer suitable for the composition.