Patent ID: 8828886

Claim:
A low dielectric constant insulating film formed of a polymer containing Si atoms, O atoms, C atoms, and H atoms, which comprises: straight chain molecules in which a plurality of basic molecules with an SiO structure are linked in a straight chain; and binder molecules with an SiO structure linking a plurality of the straight chain molecules, wherein the area ratio of a signal indicating a linear type SiO structure is 49% or more, when the total of the signal areas of a peak signal indicating a linear SiO structure appearing in the vicinity of wavenumber of 1020 cm −1 , a peak signal indicating a network SiO structure appearing in the vicinity of wavenumber of 1080 cm −1 , and a peak signal indicating a cage SiO structure appearing in the vicinity of wavenumber of 1120 cm − from among the peak signals of a spectrum obtained by analyzing said low dielectric constant insulating film by a Fourier transform infrared spectroscopy, is 100%, the signal amount of the signal indicating Si(CH 3 ) 2 is 66% or more, when the total of the signal amounts of a signal indicating Si(CH 3 ) appearing in the vicinity of wavenumber of 770 cm −1 and a signal indicating Si(CH 3 ) 2 appearing in the vicinity of wavenumber of 800 cm −1 from among the peak signals of said spectrum, is 100%, and the low dielectric constant insulating film has a dielectric constant k of 2.2 or less.