Patent ID: 7151239
Filing Date: 2006-12-19
Classification: G05D,H01L

Abstract:
1. A heat treating apparatus comprising: a heating plate for applying a designate heat treatment to a substrate mounted on a surface of the heating plate, the heating plate being heated by heating unit generating heat on power supply; a cooling plate on which the substrate loaded from its outside is mounted, thereby cooling down the substrate; transfer unit configured to exclusively transfer the substrate between the cooling plate and the heating plate; a temperature sensing part for detecting a temperature of the heating plate; and a regulating part for calculating an amount of power supply for the heating unit based on a difference between the temperature detected by the temperature sensing part and a target temperature, the regulating part further outputting a first signal corresponding to the amount of power supply calculated; a fixed-pattern output part for outputting a second signal corresponding to an amount of power supply for the heating unit based on a predetermined output pattern; and switching unit that switches a control output from an output of the regulating part to an output of the fixed-pattern output part in a period from a mounting of the substrate on the cooling plate till a mounting of the substrate on the heating plate and that switches the control output from the output of the fixed-pattern output part to the output of the regulating part at a predetermined timing after the substrate has been mounted on the heating plate, so as to compensate the operation of the regulating part derived from any disturbance in loading the substrate.