Patent ID: 6780795
Filing Date: 2004-08-24
Classification: H01L

Abstract:
A heat treatment method for continuously applying a heat treatment to a plurality of objects to be processed that are sequentially supplied to a reaction container, the heat treatment method using a heat treatment apparatus which heats the objects placed inside the reaction container by a heater provided outside the reaction container, the heat treatment method comprising the steps of:obtaining an offset temperature value which is a difference between a temperature of a processing atmosphere at a time immediately before a first one of the objects is carried into the reaction container and a temperature of the processing atmosphere at a time the temperature has become constant after the objects are subjected to a heat treatment process consecutively one after another; supplying an electric power to the heater so as to obtain a time period necessary for raising the temperature of the processing atmosphere to a temperature higher than a setting temperature for the heat treatment process by the offset temperature value; and supplying the electric power to the heater for only the time period obtained in the preceding step when the first one of the objects is carried into the reaction container, and, thereafter, performing an electric power control of the heater based on a temperature detection value of a temperature detecting part provided outside the reaction container.