Patent ID: 9165804
Filing Date: 2015-10-20
Classification: H01J,H01L

Abstract:
1. A method of cooling a process chamber component, comprising: reducing a power provided to a heater disposed proximate a surface of the process chamber component to reduce an amount of heat provided to the component by the heater; providing a coolant to coolant channels disposed within the process chamber component using a pulsed flow having a duty cycle until the process chamber component reaches a temperature that is less than or equal to a predetermined magnitude above a temperature of the coolant; and after the process chamber component reaches the temperature less than or equal to the predetermined magnitude above a temperature of the coolant, reducing the duty cycle of the pulsed flow of the coolant to zero, wherein reducing the power provided to the heater comprises: (a) providing a first heater temperature setpoint in accordance with a predetermined temperature rampdown schedule; (b) reducing the power provided to the heater until the heater reaches the first heater temperature setpoint; (c) providing a second heater temperature setpoint in accordance with a predetermined temperature rampdown schedule; (d) reducing the power provided to the heater until the heater reaches the second heater temperature setpoint; and (e) repeating (c)-(d) using sequentially lower heater temperature setpoints if the process chamber component has not reached a temperature that is less than or equal to the predetermined magnitude above the temperature of the coolant.