Patent ID: 8435351
Filing Date: 2013-05-07
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 configured to introduce metal precursor vapor above said substrate, and a pumping system configured to evacuate said process chamber; a metal precursor evaporation system configured to evaporate a metal precursor; a vapor delivery system having a first end coupled to an outlet of said metal precursor evaporation system and a second end coupled to an inlet of said vapor distribution system of said process chamber; 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 at a first flow to transport said metal precursor vapor in said carrier gas to said inlet of said vapor distribution system; a flow measurement system including a reference gas source coupled to a reference gas line and configured to supply a reference gas at a second flow through said reference gas line to a vent configured to exhaust said second flow; and a pressure measurement system including a differential pressure measurement system to measure a difference in pressure between said first flow of said carrier gas, with or without the said metal precursor vapor, through said vapor delivery system and said second flow of said reference gas through said reference gas line and to measure a flow parameter related to an amount of said metal precursor vapor when transported in said carrier gas, said vapor delivery system and said flow measurement system being fluidically coupled only by said differential pressure measurement system, and said differential pressure measurement system being downstream of said metal precursor evaporation system.