Patent ID: 6033479
Filing Date: 2000-03-07
Classification: B08B,C23C

Abstract:
An apparatus for delivering a process gas to a process chamber for chemical vapor deposition, comprising:a carrier gas generator for supplying a carrier gas;a carrier gas delivery conduit connected to the said carrier gas generator through a first valve for delivering said carrier gas into a container containing a precursor liquid;a cleaning solution supply for supplying a cleaning solution to said carrier gas delivery conduit;a process gas delivery conduit extending from said container into a process chamber for delivering said process gas from said container to said process chamber;a first feed conduit having first and second ends and a second valve therebetween for introducing said cleaning solution into said carrier gas delivery conduit, said first end being connected to said cleaning solution supply and said second end being connected to said carrier gas delivery conduit at a position close to said first valve; anda second feed conduit having first and second ends and a third valve therebetween, said first end thereof being connected to said carrier gas delivery conduit and said second end thereof being connected to said process gas delivery conduit said second feed conduit being slanted so that said first end thereof is at a higher elevation than said second end thereof;wherein said process gas delivery conduit has a disposal port for removing said cleaning solution from said process gas delivery conduit.