Electromigration path in Cu thin-film lines
- 11 May 1999
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 74 (20), 2945-2947
- https://doi.org/10.1063/1.123974
Abstract
Electromigration in 0.15–10 μm wide and 0.3 μm thick Cu lines deposited by physical vapor deposition has been investigated using both resistance and edge displacement techniques in the sample temperature range 255–405 °C. For wide polycrystalline lines (>1 μm), the dominant diffusion mechanism is a mixture of grain boundary and surface diffusion, while in narrow lines (<1 μm) the dominant mechanism is surface transport. The activation energy for grain-boundary transport is approximately 0.2 eV higher than that of surface transport.Keywords
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