Patent ID: 7422975

Claim:
A method of making an inter-level dielectric for a microelectronic device formed on a substrate, comprising: forming first and second spacer layers over a substrate layer, said spacer layers being formed from a sacrificial dielectric material; forming first and second dielectric layers on the first and second spacer layers, respectively, such that each of the first and second dielectric layers is separated by one of the spacer layers, the first and second dielectric layers each including a first and second dielectric components, the second dielectric component being a sacrificial dielectric material; removing at least a portion of the second dielectric component to thereby form voids in the first and second dielectric layers; removing at least a portion of the sacrificial dielectric material in the first and second spacer layers to thereby form voids in the first and/or second spacer layers; and after the steps of forming the first and second spacer layers and forming the first and second dielectric layers, forming a recessed feature through the first and second spacers layers and the first and second dielectric layers, and filling the recessed feature with a conductive material.