Vapor deposition of metal oxides, silicates and phosphates, and silicon dioxide
Metal silicates or phosphates are deposited on a heated substrate by the reaction of vapors of alkoxysilanols or alkylphosphates along with reactive metal amides, alkyls or alkoxides. For example, vapors of tris(tert-butoxy)silanol react with vapors of tetrakis(ethylmethylamido)hafnium to deposit hafnium silicate on surfaces heated to 300° C. The product film has a very uniform stoichiometry throughout the reactor. Similarly, vapors of diisopropylphosphate react with vapors of lithium bis(ethyldimethylsilyl)amide to deposit lithium phosphate films on substrates heated to 250° C. Supplying the vapors in alternating pulses produces these same compositions with a very uniform distribution of thickness and excellent step coverage.
1. A reagent for use in a thin film deposition process, the reagent comprising Hf(NEtMe) 4 .
2. The reagent of claim 1 , wherein the process is chemical vapor deposition.
3. The reagent of claim 1 , wherein the process is atomic layer deposition.
4. A liquid having the formula Hf(NEtMe) 4 .
5. A compound having the formula Hf(NEtMe) 4 .
6. A reagent for use in a thin film deposition process, the reagent comprising W(N t Bu) 2 (NMeR) 2 where R is one of Me and Et.
7. The reagent of claim 6 , wherein the process is chemical vapor deposition.
8. The reagent of claim 6 , wherein the process is atomic layer deposition.
9. The reagent of claim 8 , wherein the process includes exposing the reagent as a vapor to an exposed substrate.
10. A liquid having the formula W(N t Bu) 2 (NMeR) 2 where R is one of Me and Et.
11. A compound having the formula W(N t Bu) 2 (NMeR) 2 where R is one of Me and Et.