TITLE

Influence of low-energy electron irradiation on the adhesion of gold films on a silicon substrate

AUTHOR(S)
Dallaporta, H.; Cros, A.
PUB. DATE
May 1986
SOURCE
Applied Physics Letters;5/19/1986, Vol. 48 Issue 20, p1357
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Gold-silicon interfaces have been studied under ultrahigh vacuum conditions. The interface growth, its characterization by Auger electron spectroscopy, and its irradiation by low-energy (1–3 keV) electrons have all been carried out in situ. We have estimated the adhesion of the gold layer by the peeling test. The adhesion is good when Au is deposited on a clean Si substrate and poor when a native oxide (thickness ∼10–15 Å) is present at the interface. We show that the electron irradiation decomposes the oxide partially and this produces a drastic increase of the adhesion. The oxide decomposition is not thermally induced and is attributed to electronic effects. We suggest that the formation of Au–Si bonds at the interface is at the origin of the adhesion enhancement.
ACCESSION #
9819876

 

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