Patent ID: 6229116
Filing Date: 2001-05-08
Classification: F27D,H01L

Abstract:
A heat treatment apparatus for single substrate processing comprising:a hot plate on which substrates to be processed are to be mounted one by one;a heater for heating the hot plate;a plurality of first sensors for detecting temperatures of a plurality of portions of the hot plate, respectively;a second sensor for detecting temperature of a representative portion of the hot plate, said second sensor being located proximate at least one of said plurality of first sensors, wherein said second sensor and at least one of said plurality of first sensors lie at separate points on a circle, the circle centered on a hot plate surface; anda controller for controlling a heat generating operation of the heater on the basis of a plurality of first detection temperatures which are detected by the first sensors respectively, and a second detection temperature detected by the second sensor, thereby controlling temperature of the hot plate.