Electromigration effects in Al-Au multilayers

摘要: Department of Physical Chemistry, Universityof Pavia, Italy(Received August 14, 2000)(Accepted in revised form October 24, 2000)Keywords: Electromigration; Gold-aluminum; Multilayers; Intermetallic; Compound formation1. IntroductionThe use electric and magnetic fields the processing materials has been investigated for decadesand become focus renewed attention recent years (1). In studies it was found thatthe imposition an field plays a dominant role self-propagating combustion reactions (2).The to influence dynamics wave propagation, kinetics reaction, andthe mechanism phase formation. For intermetallic systems natureof phases product reaction (3–6). However, under conditions self-sustaining reactionwaves is not possible readily isolate any intrinsic effects from thermal effectsbrought about by Joule heating. While heat main effect produced passage currentthrough metals, other may play formation transformation. Among these isthe well-documented current on mass transport, i.e., electromigration. this paper we reportthe results electromigration investigation system Al-Au.Solid–solid diffusion couple were chosen investigation. The simple geometry thesamples relatively long time experiments provide optimumconditions study independent effect. Althoughinvestigations couples have numerous, only few recently made assessthe transport. An passing through sample can anadded driving force chemical potential diffusion, such that total flux nowJ