Patent ID: 6743471
Filing Date: 2004-06-01
Classification: H01L,Y10S

Abstract:
An interlayer insulating film for metal wiring of a semiconductor, said film being obtained by a process comprising the steps of:a) preparing a mixed complex of matrix resin and pore-forming material, said matrix resin is selected from the group consisting of: organosilane of the Chemical Formula 1:R1mR2nSiX4âˆ’mâˆ’n (where each of R1 and R2 which may be the same or different, is a non-hydrolysable group selected from hydrogen, alkyl, fluorine-containing alkyl or aryl group; X is a hydrolysable group selected from halide, alkoxy or acyloxy; and m and n are integers of from 0 to 3 satisfying 0&lE;m+n&lE;3) or a partially hydrolyzed condensate thereof, organic bridged silane of the Chemical Formula 2:R3pY3âˆ’pSiâ€”Mâ€”SiR4gZ3âˆ’g (where each of R3 and R4 which may be the same or different, is a non-hydrolysable group selected from hydrogen, alkyl, fluorine-containing alkyl, alkenyl or aryl; each of Y and Z which may be the same or different, is a hydrolsable group selected from halide, alkoxy or acyloxy; M is alkylene or arylene group; and p and q are integers of from 0 to 2) or a cyclic oligomer with organic bridge unit (Siâ€”Mâ€”Si) or a partially hydrolyzed condensate thereof, and a mixture thereof; and said pore-forming material containing an organic part containing one or more thermally decomposable organic linkage groups, and at least one silyl functional group at the terminal so that the pore-forming material can be connected by covalent bonding with the matrix resin; b) coating the mixed complex on a substrate; and c) heating the mixed complex to remove the organic molecule part of the pore forming material, thereby forming pores inside the complex; wherein the film has an average pore diameter less than 20 nm and is substantially free of a phase-separated domain.