Patent ID: 7023093

Claim:
A structure comprising a substrate having at least one interconnect layer disposed thereabove, said interconnect layer comprising a set of conductive vias and a set of conductive horizontal interconnect members, each comprising a top surface, disposed above said set of vias and connected thereto, wherein said horizontal interconnect members are supported by a support dielectric having a first dielectric constant and extending vertically from a lower surface of said set of vias to a lower surface of said horizontal interconnect members and extending horizontally under said horizontal interconnect members said support dielectric having the full width of said horizontal interconnect members and extending to a next via; a conformal encapsulating liner that covers the horizontal interconnect members and the sides of said support dielectric; and a gap fill dielectric, having a second dielectric constant lower in value than said first dielectric constant, filling gaps between said set of horizontal interconnect members, wherein a top surface of said gap fill dielectric is coplanar with said top surface of said set of horizontal interconnect members.