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Power feedthroughs are used to transmit either high voltage, high current or a combination of both. These products can be used for a multitude of vacuum applications including vacuum furnaces, sample heating or biasing, in-vacuum coating applications such as electron-beam evaporation, resistive heating evaporation, and DC plasma sputtering.
The most concerns of a vacuum electrical feedthrough are insulation and vacuum seal. Materials used for insulation include glass, plastic and ceramic.