Patent ID: 7855123

Claim:
A method for forming an air gap structure, comprising: depositing a sacrificial layer on a substrate, said sacrificial layer comprising a decomposable material; forming an adhesion-promoting layer between said sacrificial layer and said substrate using a chemical vapor deposition (CVD) process that includes exposing a chemical precursor to a non-ionizing heat source to cause pyrolysis of one or more species in said chemical precursor and produce molecular fragments of said one or more species in said chemical precursor; depositing a capping layer over said sacrificial layer; patterning said capping layer and said sacrificial layer to create a pattern in said capping layer and said sacrificial layer; metalizing said pattern formed in said capping layer and said sacrificial layer; decomposing said sacrificial layer by exposing said substrate to ultraviolet (UV) radiation and heating said substrate; and removing said decomposed sacrificial layer through said capping layer.