Patent ID: 6649513
Filing Date: 2003-11-18
Classification: H01L

Abstract:
A method of fabricating a planarized metal structure, comprising the steps of:providing a structure; forming a patterned dielectric layer over the structure, the patterned dielectric layer having an opening formed therein exposing at least a portion of the structure; forming a first-metal layer over the patterned dielectric layer filling the opening, first-metal layer including at least a doped metal portion adjacent the patterned dielectric layer, the doped metal portion being doped with a second-metal; annealing the structure to form a second-metal oxide layer adjacent the patterned dielectric layer; and planarizing the first-metal layer and the second-metal oxide layer using only a electropolishing process to remove the excess of the first-metal layer and the second-metal oxide layer from over the patterned dielectric layer and leaving a planarized metal structure within the opening.