Patent ID: 8691676

Claim:
A temperature control method of a substrate heat treating apparatus including a conductive heating container mounted with a filament within a vacuum exhaustible treatment container and applying acceleration voltage between the filament and the heating container to accelerate thermal electrons generated from the filament and collide the accelerated thermal electrons with the heating container to heat the heating container, and performing an annealing treatment on a substrate by heat generated from the heating container, the temperature control method comprising: performing preheating for heating an inside of the treatment container at a higher temperature than an annealing treatment temperature of the substrate and over a longer period of time than an annealing treatment time and then, cooling the inside of the treatment container to a temperature lower than the annealing treatment temperature, prior to carrying the substrate in the treatment container; and carrying the substrate in the preheated treatment container and then, increasing a temperature of the treatment container to the annealing treatment temperature to perform the annealing treatment.