Patent ID: RE40052

Claim:
A heat treatment apparatus, which comprises: a heat treatment table thereon a substrate to be treated is disposed , the heat treatment table being concentrically divided into a plurality of regions ; two or more a plurality of heaters heating each regions obtained by dividing the heat treatment table into two or more concentrically disposed in respective regions of the heat treatment table ; at least one sensor a plurality of sensors for detecting a temperature of the a predetermined portion of the heat treatment table , the plurality of sensors comprising a first group of sensors disposed in a horizontal direction of the heat treatment table and a second group of sensors disposed in a vertical direction of the heat treatment table ; a means for surmising the a temperature of each portions region of the heat treatment table based on the detected temperature temperatures detected by the first and second group of sensors ; and a means for controlling output of the each heaters heater based on the detected surmised temperature of each region so that the temperature of the entire heat treatment table is uniform ; wherein each of the heaters disposed on the heat treatment table are disposed concentric, and sensors are disposed in a thickness direction .