Patent ID: 7294584

Claim:
A method of preparing a semiconductor interlayer insulating film which comprises: providing a liquid coating composition by dissolving a siloxane-based resin prepared by hydrolyzing and condensing a silane-based monomer having the structure of Formula 1, and at least one monomer selected from the group consisting of compounds of Formulas 2 to 4, in an organic solvent in the presence of an acid or alkaline catalyst and water: Si[(CH 2 ) k SiY 1 Y 2 Y 3 ] 4 Formula 1 wherein, k is an integer of 1-10; and Y 1 , Y 2 and Y 3 are independently a C 1 -C 3 alkyl group, a C 1 -C 10 alkoxy group, or a halogen atom, provided that at least one of them is hydrolyzable, wherein, R 1 is a C 1 -C 3 alkyl group, or a C 6 -C 15 aryl group; X 1 , X 2 and X 3 are independently a hydrogen atom, a C 1 -C 3 alkyl a group, a C 1 -C 10 alkoxy group, or a halogen atom, provided that at least one of them is hydrolyzable; m is an integer of 0-10; and p is an integer of 3-8, wherein, R 2 is a C 1 -C 3 alkyl group, or a C 6 -C 15 aryl group; X 4 is a hydrogen atom, or a C 1 -C 3 alkoxy group; Y 1 is a hydrogen atom, a C 1 -C 3 alkyl group or a C 1 -C 10 alkoxy group; and n is an integer of 0-10, and R 3 SiX 5 X 6 X 7 Formula 4 wherein, R 3 is a C 1 -C 3 alkyl group, or a C 6 -C 15 aryl group; X 5 , X 6 and X 7 are independently a hydrogen atom, a C 1 -C 3 alkyl group a C 1 -C 10 alkoxy group or a halogen atom, provided that at least one of them is hydrolysable, in an organic solvent; coating a silicon wafer with the liquid coating composition to form a coating film; and heat curing the coating film.