Patent ID: 9337052
Filing Date: 2016-05-10
CPC Classification: B05D,C08G,C09D,G03F,H01L

Claim Text:
1. A resist underlayer film forming composition for EUV lithography, comprising: as a silane, a hydrolyzable silane, a hydrolyzate of the hydrolyzable silane, a hydrolysis condensate of the hydrolyzable silane, or a mixture of any of the hydrolyzable silane, the hydrolyzate, and the hydrolysis condensate, wherein the hydrolyzable silane consisting of a combination of tetramethoxysilane, an alkyltrimethoxysilane, and an aryltrialkoxysilane, the aryltrialkoxysilane is represented by formula (1): (in formula (1), R 1 is an aromatic ring consisting of a benzene ring or a naphthalene ring or a ring including an isocyanuric acid structure, R 2 is a substituent replacing a hydrogen atom on the aromatic ring and is a halogen atom or a C 1-10 alkoxy group, and X is a C 1-10 alkoxy group, a C 2-10 acyloxy group, or a halogen group; and n1 is an integer of 0 or 1, and n2 is an integer of 1 to 5 for the benzene ring or an integer of 1 to 9 for the naphthalene ring), and the hydrolyzable silane includes 10 to 35 mol of the alkyltrimethoxysilane and 2 to 25 mol of the aryltrialkoxysilane relative to 70 mol of tetramethoxysilane.