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Vapor deposition systems and methods

DC
  • US 8,202,575 B2
  • Filed: 06/27/2005
  • Issued: 06/19/2012
  • Est. Priority Date: 06/28/2004
  • Status: Active Grant
First Claim
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1. An atomic layer deposition process comprising:

  • positioning a substrate in a reaction chamber having a top surface, a bottom surface and a sidewall between the top and bottom surfaces;

    introducing a first precursor into the reaction chamber through a precursor port formed in the bottom surface, wherein a precursor layer of the first precursor is deposited on the substrate;

    removing gaseous species through an outlet port formed in the bottom surface;

    introducing a second precursor in to the reaction chamber through a precursor port formed in the bottom surface, wherein the precursor layer and the second precursor react to form a material layer on the substrate;

    removing gaseous species through the outlet port formed in the bottom surface,continuously introducing an inert gas into the reaction chamber during the steps of introducing the first precursor, removing gaseous species, introducing the second precursor and removing gaseous species; and

    reacting gaseous species removed through the outlet port on a surface area of a trap material positioned, at least in part, in the outlet port maintaining said trap material at an elevated temperature by thermal conduction from the reaction chamber without using a separate heater to heat said trap material,wherein the first precursor, the second precursor and the inert gas are introduced through the same precursor port which flow up out of the precursor port outlet on one side of the substrate, flow over an upper surface of the substrate to form the material layer on the substrate and then flow down into the outlet port,wherein gaseous species are continuously removed from the reaction chamber during the process,wherein a majority of the surface area of the trap material is substantially parallel to flow of gaseous species through the trap, andwherein the trap material is formed from a coiled corrugated non-porous metal foil element having a smooth surface.

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