Patent ID: 6355581
Filing Date: 2002-03-12
Classification: C23C,H01L

Abstract:
A method of forming a silicon oxide film over a heated substrate by High Density Plasma Chemical Vapor Deposition (HDP-CVD) using a silicon source and an oxygen source as essential reactants in the constant presence of a plasma, the method comprising the steps of:a) placing a substrate in a reaction chamber wherein said substrate has an upper surface having a plurality of steps; and b) in a HDP-CVD deposition step, inducing a reaction in a gaseous mixture composition to produce deposition of a silicon oxide film over said substrate wherein said silicon oxide film is deposited by subjecting said substrate to a plasma during the entire said deposition step, and wherein said composition comprises said silicon source, said oxygen source, a carrier gas and a halide-containing inorganic gas additive, wherein said halide-containing inorganic gas additive provides a lateral etch component to said deposition step wherein after said deposition of said silicon oxide film, worsening of film integrity and voids in said film between said steps are avoided.