Antenna cover and plasma generating device using same
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United States of America Patent
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Nov 22, 2016
Grant Date -
Jun 11, 2015
app pub date -
Dec 10, 2014
filing date -
Dec 11, 2013
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Abstract
An antenna cover that protects a surface of an antenna provided in a plasma chamber and exciting an electric field with a high frequency to an inner portion of the plasma chamber is provided. In the antenna cover, the thickness of the antenna cover in at least one direction among directions orthogonal to the surface of the antenna is different according to a position on the surface, such that space dependency of an electric potential on an external surface of the antenna cover decreases. In the antenna cover, the thickness of at least one direction may be changed along an extension direction of the antenna.
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