SUBSTRATE WHICH IS EQUIPPED WITH A STACK HAVING THERMAL PROPERTIES

• US 20100062245A1
• Filed: 11/08/2006
• Published: 03/11/2010
• Est. Priority Date: 11/08/2005
• Status: Abandoned Application

• Current Assignee: Saint-Gobain Glass France (Compagnie De Saint-Gobain)
• Original Assignee: Saint-Gobain Glass France (Compagnie De Saint-Gobain)
• Inventors: Martin, Estelle, Nadaud, Nicolas, Belliot, Sylvain, Reutler, Pascal, Mattmann, Eric
• Application Number:
  US12/092,083
• Publication Number:
  US 20100062245A1
• Time in Patent Office: Days
• US Class Current: 428/336
• CPC Class Codes: B32B 17/10174 Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
• CPC Class Codes: C03C 17/36 at least one coating being a metal
• CPC Class Codes: C03C 17/3618 Coatings of type glass/inorganic compound/other inorganic layers, at least one layer being metallic
• CPC Class Codes: C03C 17/3626 one layer at least containing a nitride, oxynitride, boronitride or carbonitride
• CPC Class Codes: C03C 17/3639 Multilayers containing at least two functional metal layers
• CPC Class Codes: C03C 17/3644 the metal being silver
• CPC Class Codes: C03C 17/366 Low-emissivity or solar control coatings
• CPC Class Codes: Y10T 428/24628 Nonplanar uniform thickness material
• CPC Class Codes: Y10T 428/265 1 mil or less
• CPC Class Codes: Y10T 428/31678 Of metal

Abstract

The invention relates to a substrate (10), especially a transparent glass substrate, provided with a thin-film multilayer coating comprising an alternation of n functional layers (40) having reflection properties in the infrared and/or in solar radiation, especially metallic functional layers based on silver, and (n+1) dielectric films (20, 60), where n≧1, said films being composed of a layer or a plurality of layers (22, 24, 62, 64), so that each functional layer (40) is placed between at least two dielectric films (20, 60), characterized in that at least one functional layer (40) includes a blocker film (30, 50) consisting of:

• • on the one hand, an interface layer (32, 52) immediately in contact with said functional layer, this interface layer being made of a material that is not a metal; and
  • on the other hand, at least one metal layer (34, 54) made of a metallic material, immediately in contact with said interface layer (32, 52).

Claims

1. A substrate (10), provided with a thin-film multilayer coating comprising an alternation of n functional layers (40) having reflection properties in the infrared and/or in solar radiation, and (n+1) dielectric films (20, 60), where n≧

1, said films being composed of a layer or a plurality of layers (22, 24, 62, 64), including at least one made of a dielectric material, so that each functional layer (40) is placed between at least two dielectric films (20, 60), wherein at least one functional layer (40) includes a blocker film (30, 50) consisting of;

an interface layer (32, 52) immediately in contact with said functional layer, this interface layer being made of a material that is not a metal;

or

at least one metal layer (34, 54) made of a metallic material, immediately in contact with said interface layer (32, 52).

2. The substrate (10) as claimed in claim 1, wherein the multilayer coating comprises two functional layers (40, 80) alternating with three films (20, 60, 100).

3. The substrate (10) as claimed in claim 1, wherein the interface layer (32, 52) is based on an oxide and/or on a nitride.

4. The substrate (10) as claimed in claim 1, wherein the metallic layer (34, 54) comprises at least one metal selected from the group consisting of:

Ti, V, Mn, Co, Cu, Zn, Zr, Hf, Al, Nb, Ni, Cr, Mo, and Ta;

or an alloy based on at least one of said metals.

5. The substrate (10) as claimed claim 4, wherein the metallic layer (34, 54) is based on titanium.

6. The substrate (10) as claimed claim 1, wherein the interface layer (32, 52) is an oxide, a nitride or an oxynitride of at least one metal selected from the group consisting of:

Ti, V, Mn, Fe, Co, Cu, Zn, Zr, Hf, Al, Nb, Ni, Cr, Mo, Ta, and W;

or an oxide of an alloy based on at least one of said metals.

7. The substrate (10) as claimed in claim 6, wherein the interface layer (32, 52) is an oxide, a nitride or an oxynitride of at least one metal that is present in the metallic layer (34, 54).

8. The substrate (10) as claimed in claim 1, wherein the interface layer (32, 52) is partially oxidized.

9. The substrate (10) as claimed in claim 1, wherein the interface layer (32, 52) is made of TiO_x where 1.5≦

x≦

1.99.

10. The substrate (10) as claimed in claim 1, wherein the interface layer (32, 52) has a geometric thickness of less than 5 nm.

11. The substrate (10) as claimed in claim 1, wherein the metallic layer (34, 54) has a geometric thickness of less than 5 nm.

12. The substrate (10) as claimed in claim 1, wherein the blocker film (30, 50) has a geometric thickness of less than 10 nm.

13. A glazing comprising at least one substrate (10) as claimed in claim 1, optionally combined with at least one other substrate.

14. The glazing as claimed in claim 13, mounted as monolithic glazing or as multiple glazing of the double-glazing type or laminated glazing, wherein at least the substrate bearing the multilayer coating is made of curved or toughened glass.

15. A process for manufacturing the substrate (10) as claimed in claim 1, comprising:

depositing a thin-film multilayer coating on the substrate (10) by a vacuum technique of sputtering, wherein each layer of a blocker film (30, 50) is deposited by sputtering from a target having a different composition from the target used for depositing at least the adjacent layer.

16. The process as claimed in claim 15, wherein the interface layer (32, 52) is deposited using a ceramic target in a nonoxidizing atmosphere.

17. The process as claimed in claim 15, wherein the targets used for depositing the layers of the blocker film (30, 50) are based on the same chemical element.

18. The process as claimed in claim 17, wherein the same chemical element is Ti.