Patent ID: 8659115

Claim:
An interconnect structure comprising: at least one patterned and cured low-k dielectric material located on a surface of a patterned inorganic antireflective coating that is located atop a substrate, wherein said at least one patterned and cured low-k dielectric material and said patterned inorganic antireflective coating having conductively filled regions embedded therein and said at least one patterned and cured low-k dielectric material having at least one airgap located adjacent, but not directly abutting the conductively filled regions, and wherein the at least one patterned and cured low-k dielectric material comprises a polymer, a copolymer, a blend including at least two of any combination of polymers and/or copolymers, wherein the polymers include one monomer and the copolymers include at least two monomers and wherein the monomers of the polymers and the monomers of the copolymers are selected from a siloxane, silane, carbosilane, oxycarbosilane, silsesquioxane, alkyltrialkoxysilane, tetra-alkoxysilane, unsaturated alkyl substituted silsesquioxane, unsaturated alkyl substituted siloxane, unsaturated alkyl substituted silane, an unsaturated alkyl substituted carbosilane, unsaturated alkyl substituted oxycarbosilane, carbosilane substituted silsesquioxane, carbosilane substituted siloxane, carbosilane substituted silane, carbosilane substituted carbosilane, carbosilane substituted oxycarbosilane, oxycarbosilane substituted silsesquioxane, oxycarbosilane substituted siloxane, oxycarbosilane substituted silane, oxycarbosilane substituted carbosilane, and oxycarbosilane substituted oxycarbosilane; a dielectric cap having a bottommost surface in direct physical contact with an uppermost surface of the at least one patterned and cured low-k dielectric material and an uppermost surface of the conductively filled region embedded in said at least one patterned and cured low-k dielectric material, said dielectric cap having an opening located therein, wherein an upper portion of the air gap is present in said opening; and an airgap cap located directly on an uppermost surface of said dielectric cap and spanning across said opening sealing said airgap.