Dewetting of molten Sn on Au/Cu/Cr thin-film metallization
- 23 December 1996
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 69 (26) , 4014-4016
- https://doi.org/10.1063/1.117855
Abstract
On Au/Cu/Cr thin film surface, a drop of molten Sn first spreads out to wet the surface, but it then pulls back to dewet. The latter is due to the spalling of Cu–Sn compounds and exposing the Cr surface to the molten Sn when all of the Cu film has been consumed by the wetting reaction. Dewetting is clearly undesirable for solder joints in electronic packaging; the phenomenon is presented here.Keywords
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