Patent ID: 7270848

Claim:
A method of depositing a Ru metal layer on a patterned substrate, the method comprising: providing a patterned substrate in a process chamber of a deposition system, wherein the patterned substrate contains one or more vias or trenches, or combinations thereof; forming a process gas containing Ru 3 (CO) 12 precursor vapor and a CO gas by: heating a solid Ru 3 (CO) 12 precursor in a precursor evaporation system to a temperature between about 60° C. and about 90° C. and maintaining the Ru 3 (CO) 12 precursor at the temperature to form the Ru 3 (CO) 12 precursor vapor, and flowing the CO gas in contact with the solid Ru 3 (CO) 12 precursor in the precursor evaporation system during the heating to capture the Ru 3 (CO) 12 precursor vapor in the CO gas as the vapor is being formed; transporting the process gas from the precursor evaporation system to the process chamber; and exposing the patterned substrate to the process gas to deposit a Ru metal layer on the patterned substrate by a thermal chemical vapor deposition process.