Embodiments related to methods for forming a film stack on a substrate are provided. One example method comprises exposing the substrate to an activated oxygen species and converting an exposed surface of the substrate into a continuous monolayer of a first dielectric material. The example method al
Embodiments related to methods for forming a film stack on a substrate are provided. One example method comprises exposing the substrate to an activated oxygen species and converting an exposed surface of the substrate into a continuous monolayer of a first dielectric material. The example method also includes forming a second dielectric material on the continuous monolayer of the first dielectric material without exposing the substrate to an air break.
대표청구항▼
1. A method of forming a film stack on a substrate, the method comprising: determining a conversion time for converting an exposed surface of a substrate into a continuous monolayer;under vacuum conditions, exposing the substrate to a plasma activated oxygen species for the conversion time;convertin
1. A method of forming a film stack on a substrate, the method comprising: determining a conversion time for converting an exposed surface of a substrate into a continuous monolayer;under vacuum conditions, exposing the substrate to a plasma activated oxygen species for the conversion time;converting an exposed surface of the substrate into a continuous monolayer of a first dielectric material; andforming a second dielectric material on the continuous monolayer of the first dielectric material without exposing the substrate to an air break,wherein the step of determining a conversion time comprises measuring a thickness of a film stack comprising the first dielectric material and the second dielectric material. 2. The method of claim 1, where converting the exposed surface into the continuous monolayer includes supplying the plasma activated oxygen species to the exposed surface until domains of the first dielectric material formed by reaction of the plasma activated oxygen species with the substrate merge into the continuous monolayer. 3. The method of claim 1, where forming the second dielectric material comprises depositing the second dielectric material by adsorbing a dielectric material precursor on the continuous monolayer of the first dielectric material. 4. The method of claim 1, where forming the second dielectric material without exposing the substrate to an air break comprises forming the second dielectric material without exposing the substrate to a vacuum break. 5. The method of claim 1, where exposing the substrate to the plasma activated oxygen species includes exposing the substrate to an activated nitrogen species. 6. The method of claim 1, where the substrate is selected from the set consisting of Si, Ge, SiGe, GaAs, InGaAs, and InP, and where the first dielectric material is selected from the set consisting of SiOxNy, SiOx, GeOxNy, GeOx, SiGeOxNy, SiGeOx, GaAsOxNy, GaAsOx, InGaAsOxNy, InGaAsOx, InPOxNy, and InPOx. 7. The method of claim 1, where the second dielectric material includes a high-K dielectric material. 8. The method of claim 7, wherein the high-K dielectric material has a dielectric constant greater than the dielectric constant of SiO2. 9. The method of claim 1, where the plasma activated oxygen species is provided by one or more of an ozone source and a remote oxygen plasma source. 10. The method of claim 1, where the substrate is hydrogen terminated and where the first dielectric material is non-hydrogen terminated. 11. The method of claim 1, where the step of converting an exposed surface of the substrate into a continuous monolayer comprises exposing the substrate to a vacuum pressure between 0.5 Torr and 5 Torr. 12. The method of claim 1, where the step of forming a second dielectric material comprises exposing the substrate to a vacuum pressure between 1 Torr and 9 Torr. 13. The method of claim 1, where the second dielectric is selected from the group consisting of HfOx, TiOx, SrOx, ZrOx, LaOx, SrTixOy, AlOx, MgO, BaTixOy, and SrxBa(1-x)TiyOz. 14. The method of claim 1, where the step of converting an exposed surface of the substrate and the step of forming a second dielectric material are performed in the same processing chamber. 15. The method of claim 1, where the step of converting an exposed surface of the substrate and the step of forming a second dielectric material are performed in different processing chambers. 16. The method of claim 1, wherein the film stack forms part of a semiconductor device gate assembly. 17. The method of claim 1, wherein a thickness of the continuous monolayer is less than or equal to 6 Angstroms. 18. The method of claim 1, wherein the plasma activated oxygen species is generated from oxygen gas. 19. The method of claim 1, wherein the plasma activated oxygen species is generated proximate the exposed surface of the substrate. 20. The method of claim 1, wherein the continuous monolayer comprises SiOxNy.
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