Substrate processing apparatus, method of manufacturing semiconductor device and non-transitory computer readable recording medium

1. A substrate processing apparatus comprising:

a process chamber including a placement unit having a placing surface whereon a substrate is placed;

a shower head including a buffer chamber and installed upstream side of the process chamber;

a gas supply system configured to alternately supply at least two types of gases into the process chamber via the buffer chamber of the shower head; and

a heating unit configured to heat the buffer chamber to a first temperature and the process chamber to a second temperature which is higher than the first temperature while the at least two types of gases are supplied via the gas supply system, wherein the heating unit comprises at least a first heating unit embedded in the placement unit and a second heating unit installed upstream side of the buffer chamber, and a temperature of the second heating unit is lower than that of the first heating unit while the at least two types of gases are supplied into the process chamber.

2. The substrate processing apparatus of claim 1 , wherein the second heating unit is provided on a lid of the shower head.

3. The substrate processing apparatus of claim 1 , wherein the heating unit further comprises a third heating unit installed at downstream side of the buffer chamber.

4. The substrate processing apparatus of claim 2 , wherein the heating unit further comprises a third heating unit installed at downstream side of the buffer chamber.

5. The substrate processing apparatus of claim 3 , wherein the third heating unit is installed on a dispersion plate of the shower head.

6. The substrate processing apparatus of claim 4 , wherein the third heating unit is installed on a dispersion plate of the shower head.

7. The substrate processing apparatus of claim 1 , wherein the second heating unit heats an inner atmosphere of the buffer chamber to a temperature equal to or higher than a temperature where by-products of one of the at least two types of gases are attached, to a temperature less than a pyrolyzing temperature of the at least two types of gases or to a temperature less than a reaction temperature where the at least two types of gases react with each other to form a film.

8. The substrate processing apparatus of claim 2 , wherein the second heating unit heats an inner atmosphere of the buffer chamber to a temperature equal to or higher than a temperature whereat by-products of one of the at least two types of gases are attached, to a temperature less than a pyrolyzing temperature of the at least two types of gases or to a temperature less than a reaction temperature whereat the at least two types of gases react with each other to form a film.

9. The substrate processing apparatus of claim 4 , wherein the first heating unit and the third heating unit heat an inner atmosphere of the process chamber to a temperature equal to or higher than a pyrolyzing temperature of the at least two types of gases.

10. The substrate processing apparatus of claim 5 , wherein the first heating unit and the third heating unit heat an inner atmosphere of the process chamber to a temperature equal to or higher than a pyrolyzing temperature of the at least two types of gases.

11. The substrate processing apparatus of claim 3 , wherein the third heating unit comprises a heating surface parallel to a surface of the substrate placed on the placement unit.

12. The substrate processing apparatus of claim 4 , wherein the third heating unit comprises a heating surface parallel to a surface of the substrate placed on the placement unit.

13. The substrate processing apparatus of claim 1 , wherein a common gas supply pipe is connected to the shower head,

the at least two types of gases comprise a first gas and a second gas, and

a first gas supply system configured to supply the first gas and a second gas supply system configured to supply the second gas are connected to the common gas supply pipe.

14. The substrate processing apparatus of claim 2 , wherein a common gas supply pipe is connected to the shower head,

the at least two types of gases comprise a first gas and a second gas, and

a first gas supply system configured to supply the first gas and a second gas supply system configured to supply the second gas are connected to the common gas supply pipe.

15. A method of manufacturing a semiconductor device, comprising:

placing a substrate on a placing surface of a placement unit accommodated in a process chamber; and

forming a film on the substrate by alternately supplying at least two types of gases into the process chamber via a shower head while heating a buffer chamber of the shower head to a first temperature and the process chamber to a second temperature which is higher than the first temperature using a heating unit comprising at least a first heating unit embedded in the placement unit and a second heating unit installed upstream side of the buffer chamber.

16. A non-transitory computer readable recording medium storing a control program to perform:

placing a substrate on a placing surface of a placement unit accommodated in a process chamber; and

forming a film on the substrate by alternately supplying at least two types of gases into the process chamber via a shower head while heating a buffer chamber of the shower head to a first temperature and the process chamber to a second temperature which is higher than the first temperature using a heating unit comprising at least a first heating unit embedded in the placement unit and a second heating unit installed upstream side of the buffer chamber.