Temperature controlling method and apparatus for a plasma processing chamber
First Claim
1. A plasma processing chamber comprising:
- a substrate holder for supporting a substrate within the processing chamber;
a dielectric member having an interior surface thereof facing the substrate holder;
a gas supply supplying process gas to the chamber;
an RF energy source which inductively couples RF energy through the dielectric member and into the chamber to energize the process gas into a plasma state; and
a cooling mechanism which cools the dielectric member and maintains the interior surface below a threshold temperature.
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Abstract
A plasma processing chamber includes a substrate holder and a dielectric member such as a dielectric window or gas distribution plate having an interior surface facing the substrate holder, the interior surface being maintained below a threshold temperature to minimize process drift during processing of substrates. The chamber can include an antenna which inductively couples RF energy through the dielectric member to energize process gas into a plasma state. The antenna can include a channel through which a temperature controlling fluid, which has been cooled by a closed circuit temperature controller, is passed. The control of the temperature of the interior surface minimizes process drift and degradation of the quality of the processed substrates during sequential batch processing of substrates such as during oxide etching of semiconductor wafers.
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Citations
23 Claims
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1. A plasma processing chamber comprising:
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a substrate holder for supporting a substrate within the processing chamber; a dielectric member having an interior surface thereof facing the substrate holder; a gas supply supplying process gas to the chamber; an RF energy source which inductively couples RF energy through the dielectric member and into the chamber to energize the process gas into a plasma state; and a cooling mechanism which cools the dielectric member and maintains the interior surface below a threshold temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A plasma processing chamber comprising:
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a substrate holder for supporting a substrate within the processing chamber; a dielectric member having an interior surface thereof facing the substrate holder; a gas supply supplying process gas to the chamber; an RF energy source which inductively couples RF energy through the dielectric member and into the chamber to energize the process gas into a plasma state; and a cooling mechanism which cools the dielectric member and maintains the interior surface below a threshold temperature, wherein the dielectric member comprises a dielectric window having first and second sections separated from each other by a gap, the first section including an outer surface exposed to ambient pressure and the second section including the interior surface, the gap being filled with a heat transfer medium. - View Dependent Claims (22)
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23. A plasma processing chamber comprising:
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a substrate holder for supporting a substrate within the processing chamber; a dielectric member having an interior surface thereof facing the substrate holder; a gas supply supplying process gas to the chamber; an RF energy source which inductively couples RF energy through the dielectric member and into the chamber to energize the process gas into a plasma state; and a cooling mechanism which cools the dielectric member and maintains the interior surface below a threshold temperature by introducing a coolant in the dielectric member.
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Specification