Patent ID: 6410149
Filing Date: 2002-06-25
Classification: B82Y,H01L,Y10T

Abstract:
A nanoporous dielectric film on a substrate prepared by a process comprising:a) combining at least one mono-, di-, or tri-functional precursor with at least one tetrafunctional precursor in a reaction mixture to form a nanoporous film precursor: b) recovering the nanoporous film precursor of (a) from said reaction mixture and depositing the same onto a suitable substrate, and c) gelling said deposited film to form a nanoporous dielectric coating on said substrate; wherein said mono-, di-, or tri-functional precursor has a number of functional leaving groups ranging from 1 to 3; and wherein said mono, di-, or tri-functional precursor is an alkoxysilane having the formula:An-SiHmâ€ƒâ€ƒ(Formula 1) wherein each A is independently all alkoxy (Oâ€”R) and R is an organic moiety independently selected from the group consisting of an alkyl and an aryl, and wherein n is an integer ranging from 1 to 3; m is an integer ranging from 1 to 3 and the sum of m and n is 4; or wherein the mono-, di-, or tri-functional precursor is an acetoxy (CH3â€”COâ€”Oâ€”) such as an acetoxy-silane compound and/or a halogenated compound such as a halogenated silane compound and/or combinations thereof; and wherein the recovered nanoporous film precursor is deposited onto said substrate by a method selected from the group consisting of spin deposition, dip-coating, spray deposition and combinations thereof.