Patent ID: 8629561

Claim:
An air gap-containing interconnect structure comprising: a substrate; a material stack located on an upper surface of the substrate; a patterned first low k material located on an uppermost surface of the material stack; a patterned second low k material located on an upper surface of the patterned first low k material; a patterned and cured photo-patternable low k material located on an upper surface of the patterned second low k material; a dielectric cap located on an upper surface of the patterned and cured photo-patternable low k material and a plurality of electrically conductive filled regions and air gaps located in said patterned and cured photo patternable low k material, wherein at least a lower portion of one of the plurality of electrically conductive filled regions extends through the patterned first and second low k materials, and where one of the air gaps includes an extended width lower portion that is present in the first patterned low k material and is connected with said one of the air gaps in the patterned and cured photo-patternable low k material by an opening within the patterned second low k material.