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Gold-Silicon Interfaces: High Resolution Electron Microscopy Reactions. Precipitation and Subsurface Gettering
Published online by Cambridge University Press: 26 February 2011
Abstract
Deposition of Au on exsitu cleaned (100) Si wafers resulted in the formation of a discontinuous polvcrvstalline Au layer containing lattice defects. On parts of the interface Au and Si were separated by a thin oxide layer, but elsewhere were in direct contact, with no evidence of metastable phase formation. Post deposition heating to 1000°C. well above the 370°C eutectic temperature of the system, caused formation of a reaction zone at the interface, and disappearance of the thin oxide layer. No amorphous phases formed during cooling. Quenching produced small Au precipitates in Si-rich regions. If the wafer contained dislocations. Au precipitation was observed on subboundaries directly connected to the Au/Si interface, but not on dislocations remote from the interface.
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- Copyright © Materials Research Society 1988
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