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The system is used in semiconductor wafer fabrication and cleanroom environments.
en.wikipedia.org To add to the design challenge, device properties often vary between each processed semiconductor wafer.
en.wikipedia.org Following, the surfaces of the wafers charge up negatively caused by the electrons and attract the positive ions of the plasma.
en.wikipedia.org The company also had significant operations in gold and silver mining, and manufacture of gallium arsenide wafers.
en.wikipedia.org To etch through a 0.5 mm silicon wafer, for example, 1001000 etch/deposit steps are needed.
en.wikipedia.org