Patent ID: 8026168
Filing Date: 2011-09-27
Classification: C23C,H01L

Abstract:
1. A method for fabricating an integrated circuit, the method comprising: providing a substrate containing a dielectric layer having a recessed feature; forming an aluminum tantalum carbonitride barrier film comprising at least 10 atomic percent aluminum over a surface of the recessed feature, the forming comprising: wherein steps a) and d) include alternating exposures of a tantalum carbonitride precursor selected from Ta(NMe wherein step b) includes exposing the substrate to an aluminum precursor selected from AlMe wherein the steps of depositing the first and second tantalum carbonitride films and depositing aluminum have no temporal overlap; depositing a Ru film on the aluminum tantalum carbonitride barrier film; depositing a Cu seed layer on the Ru film; and depositing bulk Cu onto the Cu seed layer in the recessed feature.