Patent ID: 7354852

Claim:
A method of forming a multilayer interconnection structure, which comprises: (i) forming a low dielectric constant film on a substrate; (ii) irradiating the low dielectric constant film with UV light, thereby curing the low dielectric constant film; (iii) after step (ii), laminating a UV blocking film on the cured low dielectric constant film, said UV blocking film having an extinction coefficient effective to inhibit shrinkage of the cured low dielectric constant film when being exposed to subsequent UV irradiation; (iv) laminating a next low dielectric constant film on the UV blocking film; and (v) irradiating the next low dielectric constant film with UV light, thereby curing the next low dielectric constant film while inhibiting shrinkage of the cured low dielectric constant film formed in step (ii) due to the UV blocking film.