Method for producing a material including a substrate provided with a coating
The subject of the invention is a process for obtaining a material comprising a substrate provided on at least one of its faces with a permanent coating comprising at least one thin film, said process comprising the following steps: said permanent coating is deposited on at least one of the faces of said substrate; then a temporary coating is deposited directly on top of said permanent coating, said temporary coating comprising, as the layer closest to the substrate, at least one thin film soluble in a solvent, surmounted by at least one functional layer; then the substrate thus coated is subjected to a heat treatment; and then said coated substrate is treated with said solvent so as to remove said temporary coating from the surface of said substrate.
1. A process for obtaining a material comprising a substrate comprising, on a face thereof, a permanent coating comprising a thin film, the process comprising:
depositing the permanent coating on a face of the substrate, to obtain a first coated substrate; then
depositing a temporary coating directly on top of the permanent coating, wherein the temporary coating comprises, as a layer closest to the substrate, a thin film soluble in a solvent, surmounted by a functional layer configured to absorb laser radiation having a wavelength of between 600 and 1200 nm, thereby obtaining a second coated substrate; then
heat treating the second coated substrate by rapid annealing with laser radiation having a wavelength of between 600 and 1200 nm and a surface power level greater than 20 kW/cm 2 absorbed by the functional layer, thereby improving the crystallization of a thin film of the permanent coating; and then,
contacting the second coated substrate with a solvent, thereby removing the temporary coating from the surface of the substrate, and wherein the process does not comprise heating the substrate to any temperature above 100° C.
2. The process of claim 1 , wherein the substrate is a glass or glass-ceramic sheet.
3. The process of claim 2 , wherein the substrate is a glass sheet.
4. The process of claim 2 , wherein the substrate is a glass-ceramic sheet.
5. The process of claim 1 , wherein the permanent coating comprises a thin film comprising a transparent electrically conductive oxide, silver, or titanium dioxide.
6. The process of claim 1 , wherein the solvent is water-based.
7. The process of claim 6 , wherein the thin film soluble in a solvent comprises a metal halide or a metal sulfate soluble in water.
8. The process of claim 7 , wherein the water-soluble thin film comprises a metal halide.
9. The process of claim 7 , wherein the water-soluble thin film comprises a metal sulfate.
10. The process of claim 1 , wherein the permanent coating comprises a thin film comprising a transparent electrically conductive oxide.
11. The process of claim 1 , wherein the permanent coating comprises a thin film comprising silver.
12. The process of claim 1 , wherein the permanent coating comprises a thin film comprising titanium dioxide.
13. The process of claim 1 , wherein the functional layer is a metal or metal nitride layer.
14. The process of claim 1 , wherein the functional layer is a metallic titanium layer.
15. The process of claim 1 , wherein the functional layer is a graphite layer.
16. The process of claim 1 , wherein, between depositing the temporary coating and contacting the second coated substrate with a solvent, a duration of the heat treating is one second or less.
17. The process of claim 1 , wherein the permanent coating is transparent.
18. The process of claim 1 , wherein the functional layer is configured to absorb laser radiation having a wavelength of between 700 and 1200 nm, and wherein heat treating the second coated substrate by rapid annealing is with laser radiation having a wavelength of between 700 and 1200 nm and a surface power level of greater than 20 kW/cm 2 absorbed by the functional layer, thereby improving the crystallization of a thin film of the permanent coating.