Patent ID: 6294026
Filing Date: 2001-09-25
Classification: C23C

Abstract:
A gas distribution apparatus for providing a uniform rate of reaction across a substrate mounted in a reaction chamber comprising:a substantially planar member having a plurality of apertures extending therethrough and mounting to an interior surface of the reaction chamber to form a cavity between said interior surface and said planar member;at least one modular partition disposed between a surface of said planar member and the interior surface of the reaction chamber, said at least one partition providing a gas-tight seal between portions of the cavity and separating said apertures into at least two gas distribution zones over said substrate which are operative for distributing reactant gases across the substrate mounted in said reaction chamber; anda gas control circuit for independently regulating a flow of a same reactant gas in each of the at least two gas distribution zones such that a substantially uniform reactant gas distribution is achieved over the substrate.