Electrostatic discharge(ESD) is the sudden flow of electricity between two electrically charged objects caused by contact, anelectrical short, ordielectric breakdown. A buildup of static electricity can be caused bytribocharging(摩擦带电) or byelectrostatic induction(静电感应). The ESD occurs when differently-charged objects are brought close together or when thedielectricbetween them breaks down, often creating a visiblespark.ESD can create spectacular electric sparks (lightning, with the accompanying sound ofthunder, is a large-scale ESD event), but also less dramatic forms which may be neither seen
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