Patent ID: 7635502

Claim:
A method of conducting atomic layer deposition, comprising, in the sequence set forth: providing a deposition chamber, a draw control chamber located downstream from said deposition chamber, and a draw control gas source; flowing control gas from said draw control gas source into and through said draw control chamber to determine a deposition chamber pressure; conducting a first chemical dosage stage, said first chemical dosage stage comprising flowing a first chemical reactant gas through said deposition chamber at a selected first-dosage flow rate and at a selected first-dosage pressure that is independent of said first-dosage flow rate; conducting a first purge stage by flowing a first purge gas through said deposition chamber at a selected first purge flow rate and at a selected first purge pressure that is independent of said first-purge flow rate; conducting a second chemical dosage stage, said second chemical dosage stage comprising flowing a second chemical reactant gas through said deposition chamber at a selected second-dosage flow rate and at an independently selected second-dosage pressure that is independent of said second-dosage flow rate; and conducting a second purge stage by flowing a second purge gas through said deposition chamber at a selected second purge flow rate and at a selected second purge pressure that is independent of said second purge flow rate.