Resistance degradation of metallic strips due to electromigation is studied
within a percolative approach based on a random resistor network. Both def
ect generation and recovery driven by a current stress are considered. The
main features of experiments performed on Al-0.5%Cu lines are well reproduc
ed, thus providing a unified description of degradation processes in terms
of physical parameters. (C) 2001 Elsevier Science B.V. All rights reserved.