Patent ID: 6191394
Filing Date: 2001-02-20
Classification: H01L

Abstract:
A heat treating apparatus, comprising:a hot plate having a top surface on which is placed a substrate that is to be subjected to a heat treatment;setting means for setting an original target temperature of said hot plate required for subjecting said substrate to a heat treatment;a heat energy supply source for supplying a heat energy to said hot plate;temperature detecting means for detecting the temperature of the hot plate; andcontrol means receiving a detection signal from said temperature detecting means to obtain a difference in the detected temperature of the hot plate between the state that the substrate is not placed on the hot plate and the state that the substrate is placed on the hot plate, said original target temperature being switched based on said difference, and a signal denoting said switched target temperature in place of said original target temperature being supplied from said control means to said heat energy supply source.