Patent ID: 7998864
Filing Date: 2011-08-16
Classification: H01L

Abstract:
1. A method of fabricating an interconnect structure comprising: providing a dielectric material having a dielectric constant of about 3.0 or less, said dielectric material having at least one conductive material having an upper surface embedded within said dielectric material; forming a hydrophobic surface layer within exposed surfaces of the dielectric material by plasma treatment in a hydrogen-containing ambient, while simultaneously removing oxide and organic particles from the surface of the at least one conductive material, wherein said hydrophobic surface layer has an upper surface that is coplanar with an upper surface of the at least one conductive material; and forming a noble metal cap selected from the group consisting of Ru, Ir, Rh, Pt and alloys thereof directly on said upper surface of said at least one conductive material, said noble metal cap does not substantially extend onto said hydrophobic surface layer within said dielectric material that is adjacent to said at least one conductive material, said noble metal cap forming does not result in noble metal residues on the hydrophobic surface layer.