Patent ID: 8492897

Claim:
A metal interconnect structure, comprising: a dielectric material layer containing a recessed line pattern; a metallic barrier layer abutting the dielectric material layer at sidewalls of the recessed line pattern and overlying an entirety of the dielectric material layer; a copper-containing seed layer abutting the metallic barrier layer and overlying an entirety of the dielectric material layer; and a copper-containing layer comprising electroplated copper and abutting the copper-containing seed layer, wherein at least one of the copper-containing seed layer and the copper-containing layer comprises a copper-manganese alloy, and wherein the copper-containing seed layer and the copper-containing layer form a bamboo grain within the recessed line pattern, the grain size measured at a bottom surface of the copper-containing layer exceeding a width of the copper-manganese alloy line at least every “Blech” length.