Patent ID: 9169553
Filing Date: 2015-10-27
Classification: C23C

Abstract:
1. A semiconductor device producing method comprising: transferring a substrate into a processing chamber; thereafter forming a silicon nitride film on the substrate by repeating the following a plurality of times in the following order: thereafter transferring the substrate out of the processing chamber; thereafter removing accretion that has been adhered to an inside of the processing chamber by supplying a cleaning gas including fluorine into the processing chamber; and thereafter removing fluorine included in the cleaning gas remaining in the processing chamber and forming a silicon nitride film inside the processing chamber by repeating the following a plurality of times: the gas including silicon and the plasma-activated ammonia gas are respectively supplied from first and second nozzles, the first and second nozzles being independently and exclusively connected to the processing chamber, the cleaning gas is supplied from the first nozzle and is not supplied from the second nozzle, an inert gas is supplied from the second nozzle while supplying the cleaning gas, and wherein a temperature in the processing chamber when removing fluorine included in the cleaning as remaining in the processing chamber and forming the silicon nitride film inside the processing chamber is lower than a temperature in the processing chamber when supplying the cleaning gas into the process chamber, the temperature in the processing chamber when removing fluorine included in the cleaning as remaining in the processing chamber and forming the silicon nitride film inside the processing chamber is the same as a temperature in the processing chamber when forming the silicon nitride film on the substrate, and a time for removing fluorine included in the cleaning as remaining in the processing chamber and forming the silicon nitride film inside the processing chamber is shorter than a time for forming the silicon nitride film on the substrate.