Berlin 2012 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 47: [DS] Micro- and nanopatterning (jointly with O)
O 47.1: Vortrag
Mittwoch, 28. März 2012, 11:45–12:00, H 0111
Investigation of the Fe incorporation in ion-beam induced patterning on Si (100) — •behnam khanbabaee1, andreas biermanns1, marina cornejo2, dietmar hirsch2, frank frost2, and ullrich pietsch1 — 1Universität Siegen, Festkörperphysik,Siegen, Germany — 2Leibniz-Institut für Oberflächenmodifizierung e. V. (IOM), Leipzig, Germany
Ion beam erosion of semiconductor surfaces can modify the surface and depends on main sputtering parameters; different surface topographies such as ripple or dot like pattern are fabricated on the surface. Recent experiments have shown that the incorporation of foreign metallic atoms during the sputtering process plays a crucial role in pattern formation on surfaces. In the result of investigation we report on the depth profile of Fe atoms incorporated in sputtering process on Si (100) with low energy Kr ion beam. X-ray reflectivity (XRR) measurements determine the concentration profile of Fe atoms. X-ray absorption near edge spectroscopy (XANES) at the Fe K-edge (7112 eV) shows the formation of Fe rich silicide near surface region. X-ray photoelectron spectroscopy (XPS) shows a shift in the binding energy of Si2p levels at the surface compared top bulk confirming the formation of different phases of Fe-silicide on top and below the surface. The depth profiles obtained by XRR are compared to results obtained by complementary secondary-ion mass spectrometry (SIMS).