Method of determining thermal stability of a substrate support assembly
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United States of America Patent
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Jul 25, 2017
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app pub date -
Dec 17, 2013
filing date -
Dec 17, 2013
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Abstract
A method of determining thermal stability of an upper surface of a substrate support assembly comprises recording time resolved pre-process temperature data of the substrate before performing a plasma processing process while powering an array of thermal control elements to achieve a desired spatial and temporal temperature of the upper surface. A substrate is processed while powering the array of thermal control elements to achieve a desired spatial and temporal temperature of the upper surface of the assembly, and time resolved post-process temperature data of the assembly is recorded after processing the substrate. The post-process temperature data is recorded while powering the thermal control elements to achieve a desired spatial and temporal temperature of the upper surface. The post-process temperature data is compared to the pre-process temperature data to determine whether the data is within a desired tolerance range.
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