WAFER SUPPORT TABLE
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United States of America Patent
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Issued Date -
Aug 11, 2022
app pub date -
Jan 18, 2022
filing date -
Feb 5, 2021
priority date (Note) -
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status (Latency Note)
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Abstract
A wafer support table includes a ceramic base having a wafer placement surface, and a plurality of heaters embedded in the ceramic base. The ceramic base has a first heater formation surface, a second heater formation surface, and a third heater formation surface in a stated order from the wafer placement surface toward a surface opposite from the wafer placement surface. A first heater is provided on the first heater formation surface so as to be located at a center of the ceramic base. A second heater is provided on the second heater formation surface so as to be located around a periphery of the first heater. A third heater is provided on the third heater formation surface so as to overlap the second heater and is provided in each of a plurality of zones divided from the third heater formation surface by a radial line segment.
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