Patent ID: 7577493
Filing Date: 2009-08-18
Classification: G05B,G05D,H01L

Abstract:
1. A temperature regulating method in a thermal processing system comprising a heater for heating an interior of a process chamber to process a substrate, a heating control section for controlling the heater, a first one of a thermocouple and a pyrometer for detecting a temperature in the process chamber, and a second one of a thermocouple and a pyrometer for detecting a temperature in the process chamber, wherein the first one of the thermocouple and the pyrometer is arranged in a position closer to the substrate than the second one of the thermocouple and the pyrometer, while the second one of the thermocouple or the pyrometer is arranged in a position closer to the heater than the first one of the thermocouple and the pyrometer, the temperature regulating method comprising: controlling the heater by performing integral operation, differential operation and proportional operation by the heating control section, according to a detection temperature, by the first one of the thermocouple and the pyrometer, comprising a predetermined target temperature; determining a first output control pattern by patterning a first operation amount for the heating control section to control the heater depending upon a detection temperature detected by the first one of the thermocouple and the pyrometer, in the controlling of the heater by performing integral operation, differential operation and proportional operation; controlling the heater by the heating control section, depending upon the first output control pattern according to a detection temperature, detected by the first one of the thermocouple and the pyrometer, comprising the predetermined target temperature; determining a first heat amount, at from a ramp-up start time to a time of maximum temperature, of a detection temperature detected by the second one of the thermocouple and the pyrometer in the controlling of the heater by the heating control section, and determining a second output control pattern by patterning at least a part of a second operation amount, at from the ramp-up start time to the time of maximum temperature, for the heating control section to control the heater according to a second heat amount which is obtained by subtracting an output amount based on the proportional operation from the first heat amount; and processing the substrate while controlling the heater by the heating control section according to the second output control pattern.