Patent ID: 8207059

Claim:
A method for manufacturing a multilayer wiring device, comprising: providing a silicon compound having a structure in which at least part of R 1 through R 3 in a silicon compound consisting of a polycarbosilane represented by Formula 1 below, a polysilazane represented by Formula 2 below or a mixture thereof is substituted with another group, and having higher UV absorbency at 210 nm or less than a silicon compound without the substitution: (wherein in Formula 1, R 1 and R 2 may be the same or different and each represents a hydrogen atom or optionally substituted alkyl group, alkenyl group, cycloalkyl group or aryl group, and n is a number from 10 to 1000; and in Formula 2, R 1 , R 2 and R 3 may be the same or different and each represents a hydrogen atom or optionally substituted alkyl group, alkenyl group, cycloalkyl group or aryl group, but at least one of substituents R 1 , R 2 and R 3 is a hydrogen atom, and n is the number of repeating units necessary to give the silazane polymer a number-average molecular weight of 100 to 50,000; and the symbols in Formula 1 and Formula 2 are independent of each other); forming a porous insulating film precursor layer on or over a substrate; forming a layer of said silicon compound directly on the porous insulating film precursor; and curing the porous insulating film precursor to form a cured porous film by irradiating UV through the silicon compound layer.