Patent ID: 7652378

Claim:
A semiconductor metal structure comprising: a substrate; a copper-based interconnection structure over the substrate, the copper-based interconnection structure comprising a plurality of horizontal metallization layers wherein each of the plurality of horizontal metallization layers comprises copper lines in one of first horizontal dielectric layers; a first and a second metal line in a same horizontal metallization layer, wherein the first and the second metal lines are formed in the copper-based interconnection structure and physically separated from each other; at least one aluminum-based horizontal layer over and connected to the copper-based interconnection structure, wherein a top layer of the at least one aluminum-based horizontal layer comprises a bond pad, and an interconnect line directly connected to two underlying vias, wherein each of the two underlying vias is overlying and electrically connected to one of the first and second metal lines in the same horizontal layer; a second dielectric layer formed over the top layer of the copper-based interconnection structure and vias extending through the second dielectric layer and electrically connecting a top layer of the copper-based interconnection structure and a bottom layer of the at least one aluminum-based layer; and a third dielectric layer overlying the at least one aluminum-based layer and covering the entire length of the interconnect line, wherein the bond pad is exposed through an opening in the third dielectric layer.