A compact model for early electromigration failures of copper dual-damascene interconnects
R L de Orio1, H Ceric, S Selberherr
1Institute for Microelectronics, TU Wien, Gußhausstraße 27-29/E360, 1040 Wien, Austria.
Abstract:
A compact model for early electromigration failures in copper dual-damascene interconnects is proposed. The model is based on the combination of a complete void nucleation model together with a simple mechanism of slit void growth under the via. It is demonstrated that the early electromigration lifetime is well described by a simple analytical expression, from where a statistical distribution can be conveniently obtained. Furthermore, it is shown that the simulation results provide a reasonable estimation for the lifetimes.
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