Patent ID: 6861686

Claim:
An image sensor device, comprising: a substrate having a photodiode formed therein, and a plurality of transistors formed on the substrate, the photodiode being electrically associated with the transistors; at least one lower contact formed on source/drain regions and gates of the transistors; at least one electrical interconnection line formed on the at least one lower contact and being electrically associated with the photodiode; a light passageway having a light inlet, the light passageway being positioned in alignment with the photodiode; a color filter positioned over the light inlet of the light passageway; and a lens positioned over the color filter in alignment with the light passageway, wherein the at least one electrical interconnection line includes a copper interconnection formation running through a plurality of interlayer dielectric layers in a stacked configuration with a diffusion barrier layer between adjacent interlayer dielectric layers, and a barrier metal layer between the copper interconnection formation and the plurality of interlayer dielectric layers and intervening diffusion barrier layers.