Non-linear effect of copper cluster ions induced damage in silicon
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We have observed a strong non-linear effect in copper cluster ions induced damage in silicon. Copper cluster ions Cun (n=1,2,...,7) were extracted from a source of negative ions by cesium sputtering. P-type silicon wafers were irradiated with copper cluster ions at an atomic dosage range of 8 1012 to 1 1015 atoms/cm2 at the energy of 6 keV/atom. The quantitative characterization of the cluster ion induced damage was performed by Rutherford backscattering spectrometry/channeling analysis. Comparison with analytical overlapping model shows very good agreement. 2002 Elsevier Science B.V. All rights reserved.