Termial effect minimizing method in ECP process

摘要

Methods of forming a copper interconnect using an ECP process is disclosed. One disclosed method includes forming a barrier metal layer on the surface of a single or dual damascene structure; forming a silver layer as a seed layer on the surface of the barrier metal layer; forming a Cu layer on the silver layer by performing an ECP process using the silver layer as the seed layer; and performing an annealing process and a chemical mechanical polishing process for the Cu layer to form a Cu interconnect.