Patent ID: 8227030
Filing Date: 2012-07-24
Classification: C23C,H01L

Abstract:
1. A method of manufacturing a semiconductor device, comprising: charging a product substrate to a support; loading the support having been charged with the product substrate into a reaction furnace; processing the product substrate in the reaction furnace by supplying a reaction gas into the reaction furnace through a gas supply line, and evacuating the reaction gas through an exhaust line by driving a pump connected to the exhaust line; performing a first purge in the reaction furnace, under a state that the processed product substrate has been accommodated in the reaction furnace, with an exhaust valve connected to the exhaust line being opened, by repeating a supply and a stop of the supply of an inert gas into the reaction furnace two or more times while maintaining the driving of the pump, to generate a pressure fluctuation in the reaction furnace; unloading the support, which has supported the processed product substrate, from the reaction furnace; discharging the processed product substrate from the support, after the support has been unloaded from the reaction furnace; loading the support into the reaction furnace without charging another product substrate to the support, after the processed product substrate has been discharged from the support; and performing a second purge in the reaction furnace, under a state that the support is accommodated in the reaction furnace, by performing a rise of pressure in the reaction furnace by supplying an inert gas into the reaction furnace under a state that the exhaust valve connected to the exhaust line is closed and accumulating the inert gas in the reaction furnace and an instantaneous evacuation through the exhaust line by opening the exhaust valve repeatedly two or more times, while maintaining the driving of the pump, to generate a pressure fluctuation in the reaction furnace; wherein an amount of the pressure fluctuation in the reaction furnace in the second purge is larger than an amount of the pressure fluctuation in the reaction furnace in the first purge, in the instantaneous evacuation, the supplying of the inert gas into the reaction furnace is stopped, and a cycle of the supply and the stop of the supply of the inert gas into the reaction furnace in the second purge is shorter than a cycle of the supply and the stop of the supply of the inert gas into the reaction furnace in the first purge.