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Reductions of twin and protrusion in 3C-SiC heteroepitaxial growth on Si(1 0 0)
Ist Teil von
Journal of crystal growth, 2006-05, Vol.291 (1), p.148-153
Ort / Verlag
Amsterdam: Elsevier B.V
Erscheinungsjahr
2006
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
A series of low-pressure chemical vapor deposition experiments and gas-surface chemical kinetic simulations have been carried out to achieve significant reductions of twin and protrusion in 3C-SiC heteroepitaxial growth on Si(1
0
0) substrates. A two-step epitaxial process, consisting of a nucleation stage and a subsequent epitaxial stage, was newly proposed by comparisons between experimental results and numerical predictions. The twin formation was successfully suppressed under the growth conditions of the nucleation stage leading to a relative flux ratio of C to Si larger than 56 on the deposition surface. The surface protrusion density was decreased from 7.5×10
6 to 6.5×10
4
cm
−2 when the conventional carbonization process was replaced with the proposed nucleation stage.