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The influence of p- and n-type doping on microdefect formation in macroscopically dislocation-free as-grown Czochralski silicon crystals has been studied using copper decoration, x-ray transmission topography, preferential etching, and high-voltage transmission electron microscopy. B-doped crystals are found to contain undecorated perfect dislocation loops of an interstitial nature. In Sb-doped crystals two other types of microdefects are present, one of which consists of a precipitate particle exhibiting a vacancy type of strain field. All defects are distributed in a striated pattern.
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Köck et al. (1979) studied this question.
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