Patent ID: 8987123
Filing Date: 2015-03-24
Classification: H01L

Abstract:
1. A heat treatment apparatus for heating a substrate by irradiating the substrate with a flash of light, comprising: a chamber for receiving a substrate therein; a holder for holding the substrate in said chamber; a preheating part for heating the substrate held by said holder to a predetermined preheating temperature; a flash lamp for irradiating a first surface of the substrate held by said holder with a flash of light; a gas supply part for supplying an inert gas into said chamber; an exhaust part for exhausting an atmosphere from said chamber; and a flow rate controller configured to control the gas supply part to supply the inert gas into said chamber at a first flow rate, when the substrate held by said holder is being irradiated with a flash of light, and to increase the flow rate of the inert gas supplied from said gas supply part into said chamber from said first flow rate to a second flow rate when the temperature of said first surface of said substrate has decreased to a predetermined temperature after reaching its maximum temperature.