Composition and method for low temperature chemical vapor deposition of silicon-containing films including silicon carbonitride and silicon oxycarbonitride films
View Patent ↗Silicon precursors for forming silicon-containing films in the manufacture of semiconductor devices, such as films including silicon carbonitride, silicon oxycarbonitride, and silicon nitride (Si 3 N 4 ), and a method of depositing the silicon precursors on substrates using low temperature (e.g., <550° C.) chemical vapor deposition processes, for fabrication of ULSI devices and device structures.
1. A method of depositing silicon on a substrate, comprising contacting the substrate under vapor deposition conditions with a vapor of a silicon compound of the formula
wherein R 1 , R 2 and R 3 may be the same as or different from the other and each is independently selected from the group consisting of H, C 1 -C 5 alkyl, C 3 -C 6 cycloalkyl, aryl and arylalkyl; and
X 1 , X 2 , Y 1 , Y 2 , may be the same as or different from the other and each is independently selected from the group consisting of H, alkyl, alkylamino, dialkylamino and alkylhydrazido.
2. The method of claim 1 , wherein the silicon compound has the formula (Me 2 NNMe)Me 2 Si—SiMe 2 (MeNNMe 2 ).
3. The method of claim 1 , wherein said vapor deposition conditions comprise temperature below 600° C.
4. The method of claim 1 , wherein said vapor deposition conditions comprise temperature below 550° C.
5. The method of claim 1 , wherein said vapor deposition conditions comprise temperature below 450° C.
6. The method of claim 1 , wherein said vapor deposition conditions comprise temperature below 400° C.
7. The method of claim 1 , wherein said vapor deposition conditions comprise pressure in a range of from 1 Torr to 80 Torr.
8. The method of claim 1 , wherein said contacting comprises chemical vapor deposition.
9. The method of claim 1 , wherein the vapor of the silicon compound is formed by vaporization of a solution of the silicon compound in a solvent.
10. The method of claim 9 , wherein the solvent comprises a hydrocarbon solvent.
11. The method of claim 9 , wherein the solvent is selected from the group consisting of alkanes, alkenes, alkynes, cycloalkanes, aromatic compounds, benzene, alkanols and amines.
12. The method of claim 1 , wherein the silicon is deposited on the substrate to form a silicon-containing film on the substrate.
13. The method of claim 12 , wherein the silicon-containing film comprises a composition selected from the group consisting of silicon, silicon nitride, silicon oxynitride, silicon carbonitride, and silicon oxycarbonitride.
14. The method of claim 12 , wherein the silicon-containing film comprises a multicomponent film.
15. The method of claim 12 , wherein the silicon-containing film comprises a graded composition film.
16. The method of claim 12 , wherein the silicon is deposited in a chemical vapor deposition process.
17. The method of claim 16 , wherein the chemical vapor deposition process utilizes one or more reactants selected from the group consisting of ammonia, oxygen, nitric oxide, mono alkylamines, dialkylamines, and trialkylamines.
18. The method of claim 16 , wherein said monoalkylamines, dialkylamines, and trialkylamines have the formula R 1 R 2 R 3 N, wherein R 1 , R 2 and R 3 may be the same as or different from the other and each is independently selected from the group consisting of H, and C 1 -C 4 alkyl groups.
19. The method of claim 16 , wherein the chemical vapor deposition process utilizes a carrier gas for the silicon compound vapor, wherein the carrier gas is selected from the group consisting of helium, argon and nitrogen.
20. The method of claim 1 , wherein said contacting is carried out in the manufacture of a semiconductor device.