摘要:
A substrate carrier is described that uses a proportional thermal fluid delivery system In one example the apparatus includes a heat exchanger to provide a thermal fluid to a fluid channel of a substrate carrier and to receive the thermal fluid from the fluid channel, the thermal fluid in the fluid channel to control the temperature of the carrier during substrate processing. A proportional valve controls the rate of flow of thermal fluid from the heat exchanger to the fluid channel, A temperature controller receives a measured temperature from a thermal sensor of the carrier and controls the proportional valve in response to the measured temperature to adjust the rate of flow.
摘要:
Methods and systems for adapting and/or tuning feedforward control parameters in a plasma processing chamber. In embodiments, a dependent process parameter, such as a chamber component temperature, is controlled with a feedforward control algorithm based on one or more independent process parameters, such as RF power. A control algorithm may calculate steady-state deviation of the dependent parameter from a process recipe setpoint, estimate an amount by which an existing control gain coefficient is to be changed to better achieve the setpoint, associate the new control gain coefficient with the particular recipe operation, and store the new control gain coefficient for subsequent execution of the recipe operation. In embodiments, the amount by which a gain coefficient is to be changed is based on a model function derived from a lookup table associating gain coefficients with setpoints of the dependent process parameter and values of the independent process parameter.