INTERCONNECTION STRUCTURE OF SEMICONDUCTOR INTEGRATED CIRCUIT AND METHOD FOR MAKING THE SAME

摘要

An interconnection structure includes a lower layer metal wire in a first inter-metal dielectric layer on a substrate; a second inter-metal dielectric layer on the first inter-metal dielectric layer and covering the lower layer metal wire; an upper layer metal wire on the second inter-metal dielectric layer; and a via interconnection structure in the second inter-metal dielectric layer for interconnecting the upper layer metal wire with the lower layer metal wire, wherein the via interconnection structure comprises a tungsten stud on the lower layer metal wire, and an aluminum plug stacked on the tungsten stud.