Patent ID: 6048804
Filing Date: 2000-04-11
Classification: C23C,H01L

Abstract:
A process for forming a nanoporous dielectric coating on a substrate which comprises(a) blending at least one alkoxysilane with a solvent composition and optional water, thus forming a mixture and causing a partial hydrolysis and partial condensation of the alkoxysilane;(b) depositing the mixture onto a substrate while evaporating at least a portion of the solvent composition;(c) placing the substrate in a sealed chamber and evacuating the chamber to a pressure below atmospheric pressure; then sequentially(d) exposing the substrate either to water vapor or to a base vapor, at a pressure below atmospheric pressure; then(e) exposing the substrate to water vapor if the substrate is exposed to a base vapor in step (d), or to a base vapor if the substrate is exposed to water vapor in step (d).