TRANSPARENT GLASS SUBSTRATE HAVING A COATING OF CONSECUTIVE LAYERS

• US 20140087101A1
• Filed: 05/23/2012
• Published: 03/27/2014
• Est. Priority Date: 05/24/2011
• Status: Active Grant

• Current Assignee: AGC Glass Europe SA (AGC, Inc.)
• Original Assignee: AGC Glass Europe SA (AGC, Inc.)
• Inventors: Tixhon, Eric, Didier, Delphine
• Granted Patent: US 9,517,970 B2
• Time in Patent Office: Days
• US Class Current: 428/34
• CPC Class Codes: B32B 17/10211 Doped dielectric layer, electrically conductive, e.g. SnO2:F
• CPC Class Codes: B32B 17/1022 Metallic coatings
• CPC Class Codes: C03C 17/3417 all coatings being oxide coatings
• CPC Class Codes: C03C 17/3435 comprising a nitride, oxynitride, boronitride or carbonitride
• CPC Class Codes: C03C 17/366 Low-emissivity or solar control coatings
• CPC Class Codes: C03C 2217/94 Transparent conductive oxide layers [TCO] being part of a multilayer coating
• CPC Class Codes: E06B 3/66 Units comprising two or more parallel glass or like panes permanently secured together reforming and uniting glass sheets by fusing C03B23/00; joining glass to glass or to other materials C03C27/00; laminated glass B32B17/10
• CPC Class Codes: E06B 3/6715 specially adapted for increased thermal insulation or for controlled passage of light E06B3/66323 takes precedence; coating of glass pains C03C17/00; devices or arrangements for controlling the intensity, colour, phase, polarisation or direction of light G02F1/00
• CPC Class Codes: Y10T 428/24975 No layer or component greater than 5 mils thick

Abstract

The invention relates to a transparent glass substrate having a coating including, in order: a first reflected color neutralization layer; a low-emissivity second layer essentially made up of SnO2:F and having a thickness between 455 and 800 nm; and a third layer that is essentially made up of SiOx, x being less than or equal to 2, and has a thickness between 40 and 65 nm or between 140 and 180 nm. The invention also relates to a double glass sheet and a triple glass sheet, manufactured from such a glass substrate, and to a window comprising said glass sheets.

Claims

1. A transparent glass substrate having a coating comprising, in the following order:

a first layer for neutralising colours in reflection,

a second layer with low emissivity consisting essentially of SnO₂;

F with a thickness in the range of between 455 and 800 nm, and

a third layer consisting essentially of SiO_x, wherein x is less than or equal to 2, with a thickness in the range of between 40 and 65 nm or between 140 and 180 nm.

2. The glass substrate according to claim 1, wherein the first neutralisation layer is a mono-layer consisting essentially of silicon oxynitrides of formula SiO_xN_y, or silicon oxycarbides of formula SiO_xC_y,

wherein

x is less than 2,

a refractive index thereof is from 1.65-1.75, and

a thickness of the mono-layer is between 55 and 95 nm.

3. The glass substrate according to claim 1, wherein the first neutralisation layer is a dual layer consisting of a layer of TiO₂ arranged on the glass substrate, which is coated with a layer of silicon oxide, silicon oxycarbide SiO_xC_y, or silicon oxynitride SiO_xN_y,

wherein

x is less than or equal to 2,

a thickness of TiO₂ is between 5 and 15 nm, and

a thickness of silicon oxide, oxycarbide or oxynitride is between 15 and 40 nm.

4. The glass substrate according to claim 1, wherein the first neutralisation layer is a dual layer consisting of a layer of SnO₂ or ZnO arranged on the glass substrate, which is coated with a layer of silicon oxide, silicon oxycarbide SiO_xC_y, or silicon oxynitride SiO_xN_y,

wherein x is less than or equal to 2,

a thickness of SnO₂ or ZnO is between 15 and 35 nm, and

a thickness of silicon oxide, oxycarbide or oxynitride is between 15 and 40 nm.

5. The glass substrate according to claim 1, wherein

the first neutralisation layer is a mixed layer consisting essentially of oxides of Sn and Si, and

a thickness of the first neutralisation layer is between 55 and 95 nm.

6. The glass substrate according to claim 1, wherein the thickness of the second layer with low emissivity is between 455 and 740 nm.

7. The glass substrate according to claim 1, wherein the third layer consisting essentially of SiO_x has a thickness in the range of between 43 and 60 nm.

8. A double glazing unit comprising two transparent glass substrates, one of which is a glass substrate according to claim 1, which has a U of ≦

1.4 W/m³·

K, an emissivity of less than or equal to 0.12, and a solar factor value of at least 73%.

9. The double glazing unit according to claim 8, wherein the glazing unit has a solar factor value of between 75% and 81%.

10. The double glazing unit according to claim 8, wherein the glazing unit has a value for Δ

a*b* of 3.5 at most.

11. A window comprising a reference frame and a double glazing unit according to claim 8, which has a WER with values higher than or equal to zero kWh/m²/year.

12. A triple glazing unit comprising three transparent glass substrates, at least one of which is a glass substrate according to claim 1, which has a U of ≦

1.1 W/m³·

K, an emissivity of less than or equal to 0.12 and a solar factor value of at least 64%.

13. The triple glazing unit according to claim 12, wherein the glazing unit has a solar factor value in the range of between 65% and 75%.

14. The triple glazing unit according to claim 12, wherein the glazing unit has a value for Δ

a*b* of 3.5 at most.

15. A window comprising a reference frame and a triple glazing unit according to claim 12, which has a WER with values higher than or equal to zero kWh/m²/year.

16. The glass substrate according to claim 1, wherein the third layer has a thickness of between 40 and 65 nm.

17. The glass substrate according to claim 1, wherein the third layer has a thickness of between 140 and 180 nm.

18. The window according to claim 11, wherein the double glazing unit has a WER value of between 1 and 10 kWh/m²/year.

19. The window according to claim 15, wherein the triple glazing unit has a WER value of between 1 and 10 kWh/m²/year.