Patent ID: 7371880

Claim:
A method of depositing copper on a tantalum or tantalum-containing layer, said method comprising forming a vapor of a copper precursor of the formula: wherein: R 1 and R 2 may be the same as or different from one another and each is independently selected from the group consisting of H, C 1 -C 6 alkyl, C 3 -C 7 cycloalkyl, aryl, and hydrocarbyl derivatives of silyl groups; R 3 is selected from the group consisting of H, C 1 -C 6 alkyl, C 3 -C 7 cycloalkyl, aryl, hydrocarbyl derivatives of silyl groups and NR 4 R 5, where R 4 and R 5 may be the same as or different from one another and is independently selected from the group consisting of H, C 1 -C 6 alkyl, C 3 -C 7 cycloalkyl, aryl, and hydrocarbyl derivatives of silyl groups; and contacting the copper precursor vapor with the tantalum or tantalum-containing layer to deposit copper on said layer.