Patent ID: 7670924

Claim:
A method of forming a damascene structure, comprising: depositing a porous low dielectric constant layer by a method comprising: reacting an organosilicon compound and a porogen-providing precursor; depositing a porogen-containing material; removing at least a portion of the porogen-containing material; depositing an organic layer on the porous low dielectric constant layer by reacting the porogen-providing precursor; forming a feature definition in the organic layer and the porous low dielectric constant layer; filing the feature definition with a conductive material therein; depositing a mask layer on the organic layer and the conductive material disposed in the feature definition; forming apertures in the mask layer to expose the organic layer; removing a portion or all of the organic layer through the apertures; and forming an air gap adjacent the conductive material, wherein the removing a portion or all of the organic layer comprises removing the organic layer material by a plasma etch process, a thermal annealing process, an ultra-violet curing process, an electronic beam curing process, a wet etch process, or a combination thereof.