Patent ID: 8373271

Claim:
An interconnect structure comprising: at least one patterned and cured photo-patternable low k material located directly on a surface of a patterned oxygen-doped SiC antireflective coating, wherein said at least one patterned and cured photo-patternable low k material and said patterned oxygen-doped SiC antireflective coating each have at least one conductively filled region therein, and wherein said patterned oxygen-doped SiC antireflective coating has an index of refraction n from 1.0 to 4.5 and an extinction coefficient k from 0.01 to 3.0 at a wavelength of 193 nm, and wherein said patterned oxygen-doped SiC antireflective coating provides a control of reflectivity from an underlying substrate of less than 8% and has an etch rate ratio versus the photo-patternable low k material that is greater than 1.