Compositions comprising silacycloalkanes and methods using same for deposition of silicon-containing film
Described herein are compositions and methods using same for forming a silicon-containing film such as without limitation a silicon carbide, silicon oxide, silicon nitride, silicon oxynitride, a carbon-doped silicon nitride, or a carbon-doped silicon oxide film on at least a surface of a substrate having a surface feature. In one aspect, the silicon-containing films are deposited using the co-deposition of an at least one first compound comprising a C—C double or C—C triple bond.
1. A method for depositing a silicon-containing film in a flowable chemical deposition process, the method comprising:
placing a substrate comprising a surface feature into a reactor which is at one or more temperatures ranging from −20° C. to about 150° C., wherein the surface feature comprises a pore, a via, or a trench;
introducing into the reactor a composition comprising at least one silacycloalkane precursor compound represented by formula I:
wherein R 1 is selected from the group consisting of a linear or branched C 1 to C 10 alkyl group, cyclic C 3 to C 10 alkyl group, a linear or branched C 2 to C 10 alkenyl group, and a linear or branched C 2 to C 10 alkynyl group; R 2 is selected from the group consisting of a linear or branched C 2 to C 6 alkenyl group, a linear or branched C 2 to C 6 alkynyl group, and cyclic C 3 to C 10 alkyl group; R 3 and R 4 are each independently selected from the group consisting of hydrogen, and a linear or branched C to C 10 alkyl group; and n is an integer from 3-6;
providing a plasma source into the reactor to at least partially react the at least one silacycloalkane precursor compound to form a flowable liquid, wherein the plasma source comprises nitrogen, and wherein the flowable liquid at least partially fills a portion of the surface feature, and wherein the at least one silacycloalkane precursor compound is substantially free of self-polymerization or self-oligomerization impurities, and wherein the at least one silacycloalkane precursor compound comprises impurities at a concentration of 10 ppm or less, the impurities being selected from the group consisting of chlorides, fluorides, bromides, iodides, Li, Na, K, Mg, Ca, Al, Fe, Ni, Cr as measured by IC or ICP MS; and
wherein the silicon-containing film is selected from the group consisting of silicon carbide, silicon nitride, carbon doped silicon nitride, silicon oxynitride, and carbon doped silicon oxynitride film.
2. The method of claim 1 wherein the plasma source comprises oxygen and is selected from the group consisting of water (H 2 O) plasma, oxygen plasma, ozone (O 3 ) plasma, NO plasma, N 2 O plasma, carbon monoxide (CO) plasma, carbon dioxide (CO 2 ) plasma and combinations thereof.
3. The method of claim 1 wherein the plasma source comprises nitrogen and is selected from the group consisting of nitrogen plasma, a plasma comprising nitrogen and hydrogen, a plasma comprising nitrogen and helium, a plasma comprising nitrogen and argon, ammonia plasma, a plasma comprising ammonia and helium, a plasma comprising ammonia and argon, a plasma comprising ammonia and nitrogen, NF 3 , NF 3 plasma, organic amine plasma, and mixtures thereof.
4. The method of claim 1 wherein the plasma source comprises hydrogen and is selected from the group consisting of hydrogen plasma, a plasma comprising hydrogen and helium, a plasma comprising hydrogen and argon, and mixtures thereof.
5. The method of claim 1 wherein the deposition process is a plasma enhanced chemical vapor deposition and the plasma is generated in situ.
6. The method of claim 1 wherein the deposition process is a plasma enhanced chemical vapor deposition and the plasma is generated remotely.
7. The method of claim 1 wherein a pressure of the reactor is maintained at 100 torr or less.
8. The method of claim 1 wherein the deposited film is further treated after deposition with thermal anneal, UV annealing, or e-beam treatment to improve or modify the film properties.
9. The method of claim 8 wherein the post treatment is carried out in a reactive environment.
10. The method of claim 1 wherein the composition comprising the at least one silacycloalkane precursor compound further comprises a stabilizer selected from the group consisting of 2,6-di-tert-butyl-4-methyl phenol (or BHT for butylhydroxytoluene), 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO), 2-tert-butyl-4-hydroxyanisole, 3-tert-butyl-4-hydroxyanisole, propyl ester 3,4,5-trihydroxy-benzoic acid, 2-(1,1-dimethylethyl)-1,4-benzenediol, diphenylpicrylhydrazyl, 4-tert-butylcatechol, N-methylaniline, p-methoxydiphenylamine, diphenylamine, N,N′-diphenyl-p-phenylenediamine, p-hydroxydiphenylamine, phenol, octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, tetrakis (methylene (3,5-di-tert-butyl)-4-hydroxy-hydrocinnamate) methane, phenothiazines, alkylamidonoisoureas, thiodiethylene bis (3,5,-di-tert-butyl-4-hydroxy-hydrocinnamate, 1,2,-bis (3,5-di-tert-butyl-4-hydroxyhydrocinnamoyl) hydrazine, tris (2-methyl-4-hydroxy-5-tert-butylphenyl) butane, cyclic neopentanetetrayl bis (octadecyl phosphite), 4,4′-thiobis (6-tert-butyl-m-cresol), 2,2′-methylenebis (6-tert-butyl-p-cresol), and oxalyl bis (benzylidenehydrazide).
11. The method of claim 1 , wherein the surface features has an aspect ratio of 5:1 or greater.
12. The method of claim 11 , wherein the surface features has an aspect ratio of 10:1 or greater.
13. The method of claim 1 , wherein a sum of all chlorides, fluorides, bromides, iodides, Li, Na, K, Mg, Ca, Al, Fe, Ni, and Cr impurities analyzed by gas chromatography (GC) is less than 1.0 wt. %.
14. A method for depositing a silicon-containing film in a flowable chemical deposition process, the method comprising:
placing a substrate comprising surface features having pores, vias, or trenches into a reactor which is at one or more temperatures ranging from −20° C. to about 150° C.;
introducing into the reactor a composition comprising at least one silacycloalkane precursor compound selected from the group consisting of selected from the group consisting of 1,1-divinyl-1-silacyclobutane, 1-methyl-1-vinyl-1-silacyclobutane, 1-ethyl-1-vinyl-1-silacyclobutane, 1,1-divinyl-1-silacyclopentane, 1-methyl-1-vinyl-1-silacyclopentane, 1-ethyl-1-vinyl-1-silacyclopentane, 1,1-divinyl-1-silacyclohexane, 1-methyl-1-vinyl-1-silacyclohexane, or 1-ethyl-1-vinyl-1-silacyclohexane, 1,1-diallyl-1-silacyclobutane, 1-methyl-1-allyl-1-silacyclobutane, 1-ethyl-1-allyl-1-silacyclobutane, 1,1-diallyl-1-silacyclopentane, 1-methyl-1-allyl-1-silacyclopentane, 1-ethyl-1-allyl-1-silacyclopentane, 1,1-diallyl-1-silacyclohexane, 1-methyl-1-allyl-1-silacyclohexane, or 1-ethyl-1-allyl-1-silacyclohexane, 1,1-diethynyl-1-silacyclobutane, 1-methyl-1-ethynyl-1-silacyclobutane, 1-ethyl-1-ethynyl-1-silacyclobutane, 1,1-ethynyl-1-silacyclopentane, 1-methyl-1-ethynyl-1-silacyclopentane, 1-ethyl-1-ethynyl-1-silacyclopentane, 1,1-di ethynyl-1-silacyclohexane, 1-methyl-1-ethynyl-1-silacyclohexane, and 1-ethyl-1-ethynyl-1-silacyclohexane;
providing a plasma source comprising nitrogen into the reactor to at least partially react the at least one silacycloalkane precursor compound to form a flowable liquid wherein the flowable liquid at least partially fills a portion of the surface features, wherein the at least one silacycloalkane precursor compound is substantially free of self-polymerization or self-oligomerization impurities, and wherein the at least one silacycloalkane precursor compound comprises impurities at a concentration of 10 ppm or less, the impurities being selected from the group consisting of chlorides, fluorides, bromides, iodides, Li, Na, K, Mg, Ca, Al, Fe, Ni, Cr as measured by IC or ICP MS; and
wherein the silicon-containing film is selected from the group consisting of silicon carbide, silicon nitride, carbon doped silicon nitride, silicon oxynitride, and carbon doped silicon oxynitride film.
15. The method of claim 14 wherein the plasma source comprises oxygen and is selected from the group consisting of water (H 2 O) plasma, oxygen plasma, ozone (O 3 ) plasma, NO plasma, N 2 O plasma, carbon monoxide (CO) plasma, carbon dioxide (CO 2 ) plasma and combinations thereof.
16. The method of claim 14 wherein the plasma source comprises hydrogen and is selected from the group consisting of hydrogen plasma, a plasma comprising hydrogen and helium, a plasma comprising hydrogen and argon, and mixtures thereof.
17. The method of claim 14 wherein the plasma source comprises nitrogen and is selected from the group consisting of nitrogen plasma, a plasma comprising nitrogen and hydrogen, a plasma comprising nitrogen and helium, a plasma comprising nitrogen and argon, ammonia plasma, a plasma comprising ammonia and helium, a plasma comprising ammonia and argon, a plasma comprising ammonia and nitrogen, NF 3 , NF 3 plasma, organic amine plasma, and mixtures thereof.
18. The method of claim 14 wherein the deposition process is a plasma enhanced chemical vapor deposition and the plasma is generated in situ.
19. The method of claim 14 wherein the deposition process is a plasma enhanced chemical vapor deposition and the plasma is generated remotely.
20. The method of claim 14 wherein a pressure of the reactor is maintained at 100 torr or less.
21. The method of claim 14 wherein the deposited film is further treated after deposition with thermal anneal, UV annealing, or e-beam treatment to improve or modify the film properties.
22. The method of claim 21 wherein the post treatment is carried out in a reactive environment.
23. The method of claim 14 wherein the composition comprising the at least one silacycloalkane precursor compound further comprises a stabilizer selected from the group consisting of 2,6-di-tert-butyl-4-methyl phenol (or BHT for butylhydroxytoluene), 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO), 2-tert-butyl-4-hydroxyanisole, 3-tert-butyl-4-hydroxyanisole, propyl ester 3,4,5-trihydroxy-benzoic acid, 2-(1,1-dimethylethyl)-1,4-benzenediol, diphenylpicrylhydrazyl, 4-tert-butylcatechol, N-methylaniline, p-methoxydiphenylamine, diphenylamine, N,N′-diphenyl-p-phenylenediamine, p-hydroxydiphenylamine, phenol, octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, tetrakis (methylene (3,5-di-tert-butyl)-4-hydroxy-hydrocinnamate) methane, phenothiazines, alkylamidonoisoureas, thiodiethylene bis (3,5,-di-tert-butyl-4-hydroxy-hydrocinnamate, 1,2,-bis (3,5-di-tert-butyl-4-hydroxyhydrocinnamoyl) hydrazine, tris (2-methyl-4-hydroxy-5-tert-butylphenyl) butane, cyclic neopentanetetrayl bis (octadecyl phosphite), 4,4′-thiobis (6-tert-butyl-m-cresol), 2,2′-methylenebis (6-tert-butyl-p-cresol), and oxalyl bis (benzylidenehydrazide).
24. The method of claim 14 , wherein a sum of all chlorides, fluorides, bromides, iodides, Li, Na, K, Mg, Ca, Al, Fe, Ni, and Cr impurities analyzed by gas chromatography (GC) is less than 1.0 wt. %.