Patent ID: 9570337
Date: 2017-02-14
CPC Classifications: C23C,C30B,H01L

Claim:
1. A film formation apparatus comprising: a film formation chamber configured to perform a film formation process on a transported substrate; a hollow cylindrical liner configured to separate an inner wall of the film formation chamber from a space where the film formation process is performed; a susceptor configured to mount the substrate thereon; a rotary cylinder configured to support the susceptor on an upper portion of the rotary cylinder; a rotary shaft arranged below the film formation chamber, and configured to rotate the rotary cylinder; a first heater arranged in the rotary cylinder, and configured to heat the susceptor and the substrate from below; a second heater arranged between the liner and the inner wall, and configured to heat the susceptor and the substrate from above; a temperature control unit configured to control temperatures of the first and second heaters in order to set a temperature of the susceptor to be equal to a predetermined transport temperature or a predetermined film formation temperature; a temperature detection unit configured to detect the temperature of the susceptor; a first gas supply unit provided in an upper portion of the film formation chamber, and configured to supply reactive gas and inert gas to inside of the liner, the reactive gas containing hydrogen gas and source gas; a second gas supply unit configured to supply the inert gas between the liner and the inner wall; a third gas supply unit configured to supply the inert gas into the rotary cylinder; a transport unit configured to transport the substrate into or from the film formation chamber at the predetermined transport temperature; a first valve supplying inert gas to the first gas supply unit; a second valve supplying reactive gas to the first gas supply unit; a third valve supplying inert gas to the second gas supply unit; a fourth valve supplying inert gas to the third gas supply unit; and a gas supply control unit controlling the first and second valves to switch the gas supplied to the first gas supply unit between the inert gas and the reactive gas, wherein the gas supply control unit is configured to control the first, third, and fourth valves to supply the inert gas from the first to third gas supply units at least when the transport unit transports the substrate into or from the film formation chamber, the gas supply control unit is configured to control the second valve to supply the reactive gas from the first gas supply unit and control the third and fourth valves to supply the inert gas from the second and third gas supply units when the substrate is mounted on the susceptor and the temperature of the susceptor is equal to the predetermined film formation temperature, and the temperature control unit is configured to control the temperature of the susceptor detected by the temperature detection unit to be equal to or higher than 900° C. and to be equal to or lower than the predetermined film formation temperature when the transport unit transports the substrate into or from the film formation chamber.