Patent ID: 7327947
Filing Date: 2008-02-05
Classification: C30B,H01L

Abstract:
1. A heat treating method for heat treating a substrate by irradiating the substrate with light, comprising: a first assist heating means positioning step for positioning assist heating means for loading and unloading the substrate; a substrate loading step for loading the substrate into a heat treating chamber; a second assist heating means positioning step for positioning the assist heating means for heat treating the substrate; a preheating step for preheating the substrate loaded into said heat treating chamber; a flash heating step for heating the substrate to a treating temperature by irradiating the substrate with flashes of light after the substrate in said heat treating chamber is preheated to a predetermined preheat temperature; wherein the flash heating step is carried out immediately after a surface temperature of the substrate reaches the preheat temperature, a decompressing step for decompressing said heat treating chamber to 1/10 to 1/1000 atmospheric pressure during the preheating step and the flash heating step; upon completion of the flash heating step, the heat treating chamber is opened to the atmosphere; a third assist heating means positioning step for positioning the assist heating means for loading and unloading the substrate after the substrate is heated in the flash heating step; a substrate unloading step for unloading the substrate from said heat treating chamber.