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Stress Induced Void Nucleation in Narrow Aluminum Alloy Lines

Published online by Cambridge University Press:  26 February 2011

P. Børgesen ,
M. A. Korhonen ,
C. Basa ,
W. R. Lafontaine ,
B. Land  and
C.-Y. Li
P. Børgesen
Affiliation:
Department of Materials Science & EngineeringCornell University, Ithaca, NY 14853
M. A. Korhonen
Affiliation:
Department of Materials Science & EngineeringCornell University, Ithaca, NY 14853
C. Basa
Affiliation:
Department of Materials Science & EngineeringCornell University, Ithaca, NY 14853
W. R. Lafontaine
Affiliation:
Department of Materials Science & EngineeringCornell University, Ithaca, NY 14853
B. Land
Affiliation:
Department of Materials Science & EngineeringCornell University, Ithaca, NY 14853
C.-Y. Li
Affiliation:
Department of Materials Science & EngineeringCornell University, Ithaca, NY 14853
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Abstract

The stress induced failure of passivated aluminum based metallizations is the combined result of the stress induced void nucleation and growth of voids. The present work investigates the dependence of the void nucleation on aging temperature and cooling rate. Narrow Al, Al(0.2%Cu) and Al(2%Si) lines of different widths were fabricated by lift-off and passivated with various thicknesses of Si3N4. After a 400°C anneal, the specimens were cooled directly to the selected aging temperature and aged for up to 1100 hours. Void nucleation was found to occur predominantly during the initial cool-down. The rate of nucleation varied in quite different ways with the combination of aging temperature and cooling rate for the different alloys, which is consistent with a grain boundary sliding controlled nucleation mechanism.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 226: Symposium H – Mechanical Behavior of Materials and Structures in Microelectronics , 1991 , 401
Copyright
Copyright © Materials Research Society 1991

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References

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