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Publication
International Workshop on Stress-Induced Phenomena in Metallization 2005
Conference paper
Theory for electromigration failure in Cu conductors
Abstract
A model for electromigration failure is proposed where the criterion for damage is not classical nucleation forming a void, but is a delamination at an interface. In addition, the anisotropy in the elastic constants of Cu metal is responsible for a bimodal failure distribution recognizing that the driving force for mass transport depends on the hydrostatic stress whereas the failure criterion depends on a normal stress. The agreement with published data is reasonably good. © 2006 American Institute of Physics.