Patent ID: 6730885
Filing Date: 2004-05-04
Classification: H01L

Abstract:
A batch type heat treatment system comprising:a heating furnace for housing stationary objects to be processed; a plurality of heaters which are arranged for heating each of a plurality of regions of said heating furnace; a plurality of temperature sensors for detecting the temperature of each of said plurality of regions; a memory for storing therein a plurality of temperature estimating models, which have been prepared in accordance with the number and arranged position of said objects, for estimating the temperatures of said objects in said heating furnace, on the basis of outputs of said plurality of temperature sensors; and a controller for selecting a temperature estimating model corresponding to information on the number and arranged position of said objects to be housed in said heating furnace, from said plurality of temperature estimating models to estimate the temperatures of said objects from the outputs of said plurality of temperature sensors on the basis of the selected temperature estimating model, and for controlling said plurality of heaters so that the temperatures of said objects reach target temperature values in accordance with the estimation of the temperatures of said objects.