Chemistry / Unit 8 Chem 1471 short lesson, about 20 seconds
Crystal Defects
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The idea
A crystal defect breaks a solid's ideal repeating pattern, including vacancies where a particle is missing and interstitials filling a gap.
In practice
Silicon crystals are deliberately doped with trace impurities, introducing defects that give the semiconductor its desired electrical properties.
Where people slip
A defect is a departure from ideal structure, not automatically a flaw — doping introduces defects on purpose.
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