Effect of layout on electromigration characteristics in copper dual damascene interconnects
EM behavior of Cu lines with width below 0.10?m is strongly affected by the layout which surrounded the tested EM lines. The Cu EM lifetime declines as the number of local dummy lines increase, and the global dummy line density increases. Modifying the ECP process by reducing the deposition current effectively way to weakened this layout effect. The surrounding layouts must to be considered in assessing EM reliability of a real IC circuit in advanced technology.
layout electromigration copper interconnects