Patent ID: 6924545
Filing Date: 2005-08-02
Classification: H01L

Abstract:
1. A low-dielectric-constant interlayer insulating film, comprising at least one borazine-silicon-based polymer substance selected from the group consisting of: (i) a borazine-silicon-based polymer substance obtainable by reaction of, in the presence of a platinum catalyst, B,B′,B″-triethynyl-N,N′,N″-trimethylborazine with a silicon compound having at least two hydrosilyl groups represented by formula (1); wherein, in the formula (1), R 1 and R 2 , which may be the same or different, independently represent a monovalent group selected from the group consisting of an alkyl group, an aryl group, an aralkyl group, and a hydrogen atom; and R 3 represents a divalent aromatic group that may be optionally substituted by a substituent, an oxygen atom, or an oxypoly(dimethylsiloxy) group; and (ii) a borazine-silicon-based polymer substance obtainable by reaction of, in the presence of a platinum catalyst, B,B′,B″-triethynyl-N,N′,N″-trimethylborazine with a cyclic silicon compound having at least two hydrosilyl groups represented by formula (2): wherein, in the formula (2), R 4 represents an alkyl group, an aryl group or an aralkyl group; and n is an integer of 3 or more, wherein the low-dielectric-constant interlayer insulating film is obtained by providing a film of the borazine-silicon-based polymer substance (i) or (ii), heating the film at a temperature of 200° C. or lower, and further heating at a temperature of higher than 200° C. to 500° C. to cause crosslinking to form the low-dielectric-constant interlayer insulating film.