Patent ID: 7288479
Filing Date: 2007-10-30
Classification: C23C,H01L

Abstract:
1. A method for forming Cu metallization with a barrier/seed layer, the method comprising: providing a substrate in a process chamber of a deposition system; forming a process gas containing a ruthenium carbonyl precursor vapor and a CO gas by: heating a solid ruthenium carbonyl precursor in a precursor vaporization system to form the ruthenium carbonyl precursor vapor, and flowing the CO gas in contact with the solid ruthenium carbonyl precursor in the precursor vaporization system during the heating to capture the ruthenium carbonyl precursor vapor in the CO gas as the vapor is being formed; transporting the process gas from the precursor vaporization system to the process chamber; exposing the substrate to the process gas to deposit a Ru layer on the substrate in a chemical vapor deposition process; forming a Cu seed layer on the Ru layer to prevent oxidation of the Ru layer; oxidizing at least a portion of the Cu seed layer; and plating a bulk Cu layer onto the substrate, wherein the plating substantially removes the oxidized portion of the Cu seed layer.