“…An important contribution of the present work is to study the validity of applying a continuum concept such as s to atomic scale clusters. Initial void growth modeling studies either assumed steady-state nucleation rates or derived approximate analytical expressions for isothermal conditions to describe transient nucleation behavior [17,18]. For example, Nakamura et al [19] assumed a steady state embryo size distribution during crystal cooling in their use of the classical nucleation rate expression.…”
Section: Experimental and Theoretical Characterization Of Void Formatmentioning
“…An important contribution of the present work is to study the validity of applying a continuum concept such as s to atomic scale clusters. Initial void growth modeling studies either assumed steady-state nucleation rates or derived approximate analytical expressions for isothermal conditions to describe transient nucleation behavior [17,18]. For example, Nakamura et al [19] assumed a steady state embryo size distribution during crystal cooling in their use of the classical nucleation rate expression.…”
Section: Experimental and Theoretical Characterization Of Void Formatmentioning
“…6(b) and 6(c), follows the same trend as the OPP profile, then slowly decays starting from the lower edge of the LDZ. 40,41 The removal of nuclei and the low O diffusivity 42 in N-free silicon are the factors for the small size of precipitates and the low strain in the surrounding Si matrix as shown in Fig. The strong correlation of SIMS [N] and OPP defect profile suggests that nitrogen complexes control the nuclei generation and distribution.…”
Section: A Defect Nucleation Mechanisms In N-cz Simentioning
Defect size distributions in nitrogen-doped Czochralski (N-CZ) silicon wafers were obtained using an oxygen precipitate profiler and Wright-Jenkins etching. These showed unique depth dependence in low-high and high-low-high cycled N-CZ wafers. Unique phenomena observed include a high defect concentration at the subsurface that decreases within the top 2 m of the so-called denuded zone. In contrast to N-free CZ Si for which the first high step annealing dissolves the grown-in defects, these appeared to be stable in N-CZ Si. As a result, the defect size distribution in the bulk was found to be independent of the annealing cycle. It was also found that the depth dependent defect concentration correlates well with oxygen and strongly with nitrogen secondary ion mass spectroscopy profiles, suggesting that nitrogen is the leading impurity in the defect formation processes even though introduced at very low concentration. Nitrogen appeared to effectively modify the nucleation regime by a drastic increase of the nuclei density. At low temperature under external stress, nitrogen and oxygen cosegregate to the surface where the stress is applied; such a phenomenon is largely increased at high temperature.
“…Зародышеобразование может осуществляться в узлах кристаллической решетки, где несколько свободных атомов кислорода находятся близко один к другому (гомогенное зародышеобразование [43,44]), или на дефекте решетки (гетерогенное зародышеобразование [7,11,12,13]). Оба процесса ведут к формированию зародышей, которые имеют различные распределения и размеры.…”
Section: термодинамические принципы образования преципитатов кислородunclassified
“…Эта модель насыщения при зародышеобразовании подтверждается хорошим совпадением с экспериментом [44]. В работе [44] был сделан вывод о том, что гомогенное зародышеобразование лежит в основе явления, характеризующего рост преципитатов и получившего название временная задержка, что для соотношения (6) рассматривается как экспериментально установленный факт.…”
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