Evaluation of electromigration and stressmigration reliabilities of copper interconnects by a simple pulsed-current stressing technique

Abstract

By using a simple pulsed-current stressing technique, we have demonstrated that both electromigration and stressmigration resistance of giant-grain Cu interconnects can be evaluated separately in a very efficient manner. From the results of such lifetests, it was found that the reliability of the the Cu interconnect is primarily determined by the stressmigration rather than by the electromigration.<>