Thermodynamic and kinetic considerations on the equilibrium shape for thermally induced microdefects in Czochralski silicon

摘要

Using thermodynamic and kinetic considerations, we explain the quasiequilibrium, morphological, and structural characteristics of thermally induced oxide precipitates in Czochralski silicon. A model based upon the formation of Frenkel defects at the silicon/silica interface is used to explain the experimentally observed precipitate shapes: 〈110〉 coesite rods, (100) vitreous silica discs, and silica polyhedra at low, intermediate, and high temperatures, respectively.