Method of manufacturing semiconductor device, substrate processing apparatus, substrate processing system and recording medium
There is provided a technique including: (a) forming a thin film containing a predetermined element, oxygen and carbon on a substrate by performing a cycle a predetermined number of times, the cycle including: (a-1) supplying a source gas containing the predetermined element, carbon and a halogen element having a chemical bond between the predetermined element and carbon to the substrate; (a-2) supplying an oxidizing gas to the substrate; and (a-3) supplying a catalytic gas to the substrate; (b) removing a first impurity from the thin film by thermally processing the thin film at a first temperature higher than a temperature of the substrate in (a); and (c) removing a second impurity different from the first impurity from the thin film by thermally processing the thin film at a second temperature equal to or higher than the first temperature after performing (b).
1. A method of manufacturing a semiconductor device, comprising:
(a) forming a thin film containing a predetermined element, oxygen and carbon on a substrate by performing a cycle a predetermined number of times, the cycle including: (a-1) supplying to the substrate a source gas containing the predetermined element, carbon and a halogen element, the source gas having a chemical bond between the predetermined element and carbon; (a-2) supplying an oxidizing gas to the substrate; and (a-3) supplying a catalytic gas free of oxygen to the substrate;
(b) removing a first impurity containing H 2 O and chlorine from the thin film formed in (a) by thermally processing the thin film at a first temperature higher than a temperature of the substrate in (a); and
(c) removing a second impurity different from the first impurity and containing a hydrocarbon compound from the thin film formed in (a) by thermally processing the thin film at a second temperature equal to or higher than the first temperature after performing (b).
2. The method of claim 1 , wherein the first temperature is a temperature whereat the thin film is not oxidized by the first impurity when the first impurity is removed from the thin film in (b).
3. The method of claim 2 , wherein the first temperature is a temperature whereat the first impurity does not react with other impurities contained in the thin film and different from the first impurity when the first impurity is removed from the thin film in (b).
4. The method of claim 2 , wherein the first temperature is a temperature whereat the first impurity does not react with the second impurity contained in the thin film when the first impurity is removed from the thin film in (b).
5. The method of claim 2 , wherein the first temperature ranges from 300° C. to 450° C.
6. The method of claim 5 , wherein the second temperature ranges from 300° C. to 900° C.
7. The method of claim 6 , wherein the temperature of the substrate in (a) ranges from room temperature to 150° C.
8. The method of claim 1 , wherein the predetermined element includes silicon, and the source gas has at least one selected from a group consisting of Si—C bond, Si—C—Si bond and Si—C—C—Si bond.
9. The method of claim 1 , wherein the source gas includes at least one selected from a group consisting of bis(trichlorosilyl)methane [(SiCl 3 ) 2 CH 2 ] gas, 1,2-bis(trichlorosilyl)ethane [(SiCl 3 ) 2 C 2 H 4 ] gas, 1,1,2,2-tetrachloro-1,2-dimethyldisilane [(CH 3 ) 2 Si 2 Cl 4 ] gas and 1,2-dichloro-1,1,2,2-tetramethyldisilane [(CH 3 ) 4 Si 2 Cl 2 ] gas.
10. The method of claim 1 , wherein the catalytic gas includes at least one selected from a group consisting of triethylamine [(C 2 H 5 ) 3 N] gas, diethylamine [(C 2 H 5 ) 2 NH] gas, monoethylamine (C 2 H 5 NH 2 ) gas, trimethylamine [(CH 3 ) 3 N] gas, monomethylamine [(CH 3 )NH 2 ] gas, pyridine (C 5 H 5 N) gas, aminopyridine (C 5 H 6 N 2 ) gas, picoline (C 6 H 7 N) gas, lutidine (C 7 H 9 N) gas, piperazine (C 4 H 10 N 2 ) gas and piperidine (C 5 H 11 N) gas.
11. The method of claim 1 , wherein the oxidizing gas includes at least one selected from a group consisting of water vapor (H 2 O gas), ozone (O 3 ) gas, hydrogen peroxide (H 2 O 2 ) gas, a mixture gas of hydrogen (H 2 ) gas and oxygen (O 2 ) gas, and a mixture gas of hydrogen (H 2 ) gas and ozone (O 3 ) gas.
12. The method of claim 1 , wherein (b) and (c) are performed in oxygen-free atmosphere by supplying an oxygen-free gas to the substrate.
13. A non-transitory computer-readable recording medium storing a program that causes a computer to perform a process, the process comprising:
(a) forming a thin film containing a predetermined element, oxygen and carbon on a substrate by performing a cycle a predetermined number of times, the cycle including: (a-1) supplying to the substrate a source gas containing the predetermined element, carbon and a halogen element, the source gas having a chemical bond between the predetermined element and carbon; (a-2) supplying an oxidizing gas to the substrate; and (a-3) supplying a catalytic gas free of oxygen to the substrate;
(b) removing a first impurity containing H 2 O and chlorine from the thin film formed in (a) by thermally processing the thin film at a first temperature higher than a temperature of the substrate in (a); and
(c) removing a second impurity different from the first impurity and containing a hydrocarbon compound from the thin film formed in (a) by thermally processing the thin film at a second temperature equal to or higher than the first temperature after performing (b).