Patent ID: 7313931
Filing Date: 2008-01-01
Classification: C23C,H01L

Abstract:
1. A heat treatment apparatus comprising a carrier chamber into which and out of which a substrate is carried, a conveyance chamber for conveying the substrate and a hot-wall type heat treatment unit for heat-treating the substrate, said carrier chamber, conveyance chamber, and hot-wall type heat treatment unit being connected in an airtight manner, a glass substrate for liquid crystal displays being taken from a substrate carrier in the carrier chamber by conveying means in said conveyance chamber and being conveyed into said heat treatment unit in which a heat treatment is applied to the glass substrate, said apparatus further comprising: a placement part for placing the glass substrate in a reaction container; a gas supply part for supplying a gas for heat exchange to a surface of the glass substrate placed on the placement part; a temperature detecting part for detecting a temperature of the glass substrate placed on the placement part; a flow passage opening and closing part provided to a gas flow path for delivering the gas to said gas supply part; and a control part operatively configured to control the flow passage opening and closing part to supply a gas for heat exchange to said glass substrate based on the detected temperature of the glass substrate when raising a temperature inside said reaction container to a process temperature and/or decreasing the temperature of the reaction container after the heat treatment, the flow passage opening and closing part including an opening and closing valve which controls the supply of the gas for heat exchange in accordance with the detected temperature of the glass substrate.