Titanium-containing film forming compositions for vapor deposition of titanium-containing films
Titanium-containing film forming compositions comprising titanium halide-containing precursors are disclosed. Also disclosed are methods of synthesizing and using the disclosed precursors to deposit Titanium-containing films on one or more substrates via vapor deposition processes.
1. A titanium-containing film forming composition comprising a titanium bromide-containing precursor having one of the following formula:
TiX b :A c
with b=3 or 4; c=1-3; X=Br; A=SR 2 , SeR 2 , TeR 2 , or PR 3 , and each R is independently H or a C1-C5 hydrocarbon, wherein the Ti bromide-containing precursor is a liquid at standard temperature and pressure.
2. The titanium-containing film forming composition of claim 1 , further comprising a mixture of TiBr 2 (═O), TiBr 3 (OH)), and TiO 2 .
3. The titanium-containing film forming composition of claim 2 , further comprising hydrogen bromide.
4. The titanium-containing film forming composition of claim 1 , further comprising a mixture of TiI 2 (═O), TiI 3 (OH), and TiO 2 .
5. The titanium-containing film forming composition of claim 1 , further comprising hydrogen iodide.
6. The titanium-containing film forming composition of claim 1 , wherein A is SR 2 .
7. The titanium-containing film forming composition of claim 6 , wherein each R is independently a C1-C2 hydrocarbon when c=2.
8. The titanium-containing film forming composition of claim 6 , wherein the Ti halide-containing precursor being TiBr 4 :S(nPr) 2 .
9. The titanium-containing film forming composition of claim 6 , further comprising TiX 4 :SR′ 2 , wherein each R′ is independently H or a C1-C5 hydrocarbon and R′≠R.
10. The titanium-containing film forming composition of claim 1 , wherein A is SeR 2 .
11. The titanium-containing film forming composition of claim 1 , wherein A is TeR 2 .
12. The titanium-containing film forming composition of claim 1 , wherein A is PR 3 .
13. The titanium-containing film forming composition of claim 1 , further comprising a hydrocarbon solvent or of free adduct.
14. The titanium-containing film forming composition of claim 1 , further comprising H 2 O.
15. A method of depositing a Ti-containing film on a substrate, the method comprising introducing the Ti-containing film forming composition of claim 1 into a reactor containing the substrate and depositing at least part of the Ti bromide-containing precursor onto the substrate to form the Ti-containing film.
16. The method of claim 15 , further comprising introducing a reactant into the reactor.
17. The method of claim 15 , wherein the Ti-containing film is selectively deposited onto the substrate.