We report results of a detailed study of structural and electrical properties of copper silicide precipitates in silicon. Using conventional and high‐resolution transmission electron microscopy we observe that metastable platelets surrounded by extrinsic stacking faults form upon quenching from high temperatures. By ripening experiments at low temperatures as well as by a variation of cooling rates it is shown how homogeneous copper precipitation merges into the heterogeneous precipitation mode of colony growth. The application of recently developed criteria for the interpretation of deep level transient spectra from extended defects allows to conclude that deep electronic states associated with the precipitates have bandlike character.
Dedicated to Professor Dr. P E m HAASEN on the occasion of his 65th birthday Germanium bicrystals with [Ol 11-tilt grain boundaries are grown by the two-seed Czochralski method. Dissociated near-coincidence grain boundaries with an orientation between C19 and C27 and asymmetric boundary planes contain networks of secondary dislocation which account for the deviation from the ideal coincidence orientation. Both conventional TEM and HREM are applied to determine the Burgers vectors and arrangements of the secondary dislocations. The complex dislocation structure can be analyzed and related to the C19 DSC lattice. The main result that uncommon and nonprimitive Burgers vectors are observed is discussed from the perspective of the total energy of the grain boundary.Germanium Bikristalle mit [Ol 11-Kippkorngrenzen werden nach der Czochralski-Methode gezogen.Aufgespaltene Nah-Koinzidenz-Korngrenzen mit Orientierungen zwischen 219 und C27 und unsymmetrischen Korngrenzenebenen enthalten Netzwerke von Sekundarversetzungen, die wegen der Abweichung von der idealen Koinzidenzorientierung eingefiihrt werden. Sowohl konventionelle TEM als auch hochauflosende Elektronenmikroskopie (HREM) werden angewandt, um die Burgers-Vektoren und die Versetzungsanordnung zu bestimmen. Die komplexe Versetzungsstruktur kann in Beziehung zu dem C19-DSC-Gitter gesetzt und analysiert werden. Das wesentliche Ergebnis, dal3 ungewohnliche und nicht-primitive Burgers-Vektoren beobachtet werden, wird diskutiert unter Beriicksichtigung der Gesamtenergie der Korngrenze.
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