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Dislocation Climb in the Electron Wind

Published online by Cambridge University Press:  22 February 2011

Z. Suo
Z. Suo*
Affiliation:
Mechanical and Environmental Engineering Department and Materials Department, University of California, Santa Barbara, CA 93111
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Abstract

When a current flows in a conductor, the electron wind causes atoms to diffuse. This paper considers the consequences of such diffusion along dislocation cores. A dislocation climbing in a crystal is viewed as a non-equilibrium thermodynamic system to define the force that drives selfdiffusion along the core. Not only is a dislocation a mass-transport pipe, it also climbs and generates more dislocations—all in the electron wind. A prismatic loop moves like a rigid disk, as atoms electro-migrate along the core from one edge of the loop to the other. Each loop is therefore a mass carrier responding to an electric current. Interstitial and vacancy loops can be simultaneously generated and subsequently climb in the opposite directions. The process transports mass in single crystal or bamboo-like interconnects at moderate temperatures.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 338: Symposium – Materials Reliability in Microelectronics IV , 1994 , 379
Copyright
Copyright © Materials Research Society 1994

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References

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