Patent ID: 6194030
Filing Date: 2001-02-27
Classification: C23C

Abstract:
An apparatus for depositing a thin film on a surface of a plurality of substrates, comprising:a) a liner tube having a first end, a second end and an interior capable of accommodating the substrates between said first and second ends;b) a gas supply system for providing a reactive gas to said interior at or near said first end;c) a gas exhaust system to exhaust said gas emerging from said second end, said exhaust system including an exhaust conduit located downstream from said second end, said exhaust conduit having a longitudinal axis and a cross-sectional area transverse to said longitudinal axis; andd) a gas flow restrictor arranged at said second end for controlling the flow of said gas between said first and said second ends, wherein said restrictor has a plurality of apertures distributed over said restrictor that extend through said restrictor, said plurality of apertures providing a collective flow area through said restrictor that is substantially equal to said cross-sectional area of said exhaust conduit.