| http://www.w3.org/ns/prov#value | - On the other hand, where the film is made polycrystalline by annealing at a high temperature of 900??? to 1200??? C. not at a moderate temperature as described above, impurities segregate by solid-phase growth from nuclei, so that impurities such as oxygen, carbon, and nitrogen are collected in quantity at the grain boundaries.
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