Heating a substrate support in a substrate handling chamber

A technique for heating a substrate support, such as a susceptor, includes establishing respective final temperature setpoints for first and second heating elements in the susceptor. The temperatures of the heating elements are raised to their respective final temperature setpoints based on a predet...

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Bibliographische Detailangaben
Hauptverfasser:	SHEN, DUOYAN, ZOHAR, EITAN, BEER, EMANUEL, KOLLRACK, MARC M
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL CONTROLLING DIFFUSION TREATMENT OF METALLIC MATERIAL ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRICITY GLASS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES METALLURGY MINERAL OR SLAG WOOL PHYSICS REGULATING SEMICONDUCTOR DEVICES SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
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Beschreibung
Zusammenfassung:	A technique for heating a substrate support, such as a susceptor, includes establishing respective final temperature setpoints for first and second heating elements in the susceptor. The temperatures of the heating elements are raised to their respective final temperature setpoints based on a predetermined heating rate. The temperatures of the first and second heating elements are controlled so that the difference between the temperatures of the first and second heating elements does not exceed the predetermined value while the temperatures of the heating elements are raised to their respective final temperature setpoints. Controlling the temperatures includes setting interim setpoints for the first and second heating elements, where the interim setpoint for the heating element having the greater heating capacity depends on the current value of the interim setpoint of the other heating element and the predetermined value. The temperatures of the first and second heating elements are raised toward their respective interim temperature setpoints for a predetermined delay period. At the end of the delay period, new interim setpoints can be established and the process repeated until the temperature of at least one of the first and second heating elements is close to its respective final setpoint. A relatively high duty cycle can be achieved which also reduces the likelihood of deformation of the substrate support.