Patent ID: 8268078
Filing Date: 2012-09-18
Classification: C23C

Abstract:
1. A deposition system for forming a refractory metal film on a substrate, comprising: a process chamber having a substrate holder configured to support said substrate and heat said substrate; a vapor distribution system comprising a housing having an inlet and a vapor distribution plate coupled to said housing and having a plurality of openings therein, said vapor distribution system configured to introduce metal precursor vapor through said plurality of openings to above said substrate; and a pumping system configured to evacuate said process chamber; a metal precursor evaporation system configured to evaporate a metal precursor to form a metal precursor vapor; a vapor delivery system having a first end coupled to an outlet of said metal precursor evaporation system and a second end coupled to said inlet of said housing, said vapor delivery system being characterized by a flow conductance in excess of about 50 liters/second; a carrier gas supply system coupled to at least one of said metal precursor evaporation system or said vapor delivery system, or both, and configured to supply a carrier gas to transport said metal precursor vapor in said carrier gas through said vapor delivery system to said inlet of said housing; and one or more particle diffusers disposed within said deposition system along a flow path of said carrier gas and said metal precursor vapor and comprising structure sufficient to break-up particle clusters passing through said diffuser into particle fragments, wherein a net flow conductance through said plurality of openings in said vapor distribution plate is equal to or greater than the flow conductance through said vapor delivery system; wherein said metal precursor evaporation system comprises one or more precursor trays configured to support said metal precursor, and wherein said one or more particle diffusers are coupled to at least one of said one or more precursor trays above said metal precursor; wherein said one or more particle diffusers comprise a honeycomb structure.