Transparent panel with electrically conductive coating

Patent metadata

Field	Value
Publication number	US-9359807-B2
Application number	US-201214358656-A
Country	US
Kind code	B2
Filing date	Oct 4, 2012
Priority date	Jan 10, 2012
Publication date	Jun 7, 2016
Grant date	Jun 7, 2016

Abstract

A transparent panel is described. The transparent panel has at least one transparent substrate and at least one electrically conductive coating on at least one surface of the transparent substrate. The electrically conductive coating has at least two functional layers which are arranged one above the other, and each functional layer has at least an optically highly refractive material layer, which has a refractive index greater than or equal to 2.1, and a smoothing layer, which is above the optically highly refractive material layer. The smoothing layer contains at least one non-crystalline oxide, a first matching layer, which is above the smoothing layer, an electrically conductive layer, which is above the first matching layer, and a second matching layer, which is above the electrically conductive layers. The total thickness of all the electrically conductive layers is between 40 nm and 75 nm, and the electrically conductive coating has a low ohm/square sheet resistance. The optically highly refractive material contains at least one mixed silicon/metal nitride.

First claim

The invention claimed is:

1. A transparent pane, comprising:
at least one transparent substrate, and
at least one electrically conductive coating on at least one surface of the transparent substrate,
wherein:
the electrically conductive coating has at least two functional layers arranged one above the other and each functional layer comprises at least:
one layer of an optically highly refractive material with a refractive index greater than or equal to 2.1,
above the layer of the optically highly refractive material, a smoothing layer, which contains at least one non-crystalline oxide,
above the smoothing layer, a first matching layer,
above the first matching layer, an electrically conductive layer, and
above the electrically conductive layer, a second matching layer,
a total layer thickness of all the electrically conductive layers is from 40 nm to 75 nm, and
the electrically conductive coating has a sheet resistance less than 1 ohm/square, and
wherein the layer of the optically highly refractive material contains at least one mixed silicon/metal nitride.

2. The transparent pane according to claim 1 , wherein the electrically conductive coating is an electrically heatable coating.

3. The transparent pane according to claim 1 , wherein the electrically conductive coating is a coating with reflecting properties for the infrared range.

4. The transparent pane according to claim 1 , wherein the electrically conductive coating has three functional layers arranged one above the other.

5. The transparent pane according to claim 1 , wherein the electrically conductive coating has a sheet resistance from 0.4 ohm/square to 0.9 ohm/square.

6. The transparent pane according to claim 1 , wherein the total layer thickness of all the electrically conductive layers is from 50 nm to 60 nm.

7. The transparent pane according to claim 1 , wherein the layer of an optically highly refractive material contains at least one mixed silicon/zirconium nitride.

8. The transparent pane according to claim 1 , wherein each layer of an optically highly refractive material arranged between two electrically conductive layers has a thickness from 35 nm to 70 nm.

9. The transparent pane according to claim 1 , wherein the smoothing layer contains at least one non-crystalline mixed oxide and has a thickness from 3 nm to 20 nm.

10. The transparent pane according to claim 9 , wherein the mixed tin/zinc oxide is antimony-doped mixed tin/zinc oxide.

11. The transparent pane according to claim 1 , wherein the electrically conductive layer contains at least silver or a silver-containing alloy and has a layer thickness from 8 nm to 25 nm.

12. The transparent pane according to claim 1 , wherein the first matching layer or the second matching layer contains zinc oxide ZnO 1-δ with 0<δ<0.01 and has a thickness from 3 nm to 20 nm.

13. The transparent pane according to claim 1 , wherein at least one functional layer includes at least one blocker layer, which is arranged immediately above or immediately below the electrically conductive layer and which contains at least niobium, titanium, nickel, chromium, or alloys thereof, and wherein the blocker layer has a thickness from 0.1 nm to 2 nm.

14. The transparent pane according to claim 1 , wherein a cover layer is arranged above the uppermost functional layer and wherein the cover layer preferably contains at least one optically highly refractive material with a refractive index greater than or equal to 2.1.

15. The transparent pane according to claim 14 , wherein the at least one optically highly refractive material contained in the cover layer is a mixed silicon/metal nitride.

16. The transparent pane according to claim 14 , wherein the at least one optically highly refractive material contained in the cover layer is a mixed silicon/zirconium nitride.

17. The transparent pane according to claim 14 , wherein the at least one optically highly refractive material contained in the cover layer is aluminum-doped mixed silicon/zirconium nitride.

18. The transparent pane according to claim 1 , wherein the transparent substrate is bonded to a second pane via at least one thermoplastic intermediate layer to form a composite pane and wherein a total transmittance of the composite pane is greater than 70%.

19. A method for producing the transparent pane with the electrically conductive coating according to claim 1 , comprising:
applying at least two functional layers one after another on a transparent substrate, and
applying, for each functional layer one after another at least:
one layer of an optically highly refractive material with a refractive index greater than or equal to 2.1,
a smoothing layer, which contains at least one non-crystalline oxide,
a first matching layer,
an electrically conductive layer, and
a second matching layer.

20. A method comprising:
using the transparent pane according to claim 1 as a pane or as a component of a pane in buildings or in means of transportation for travel.

21. The transparent pane according to claim 1 , wherein the at least one mixed silicon/zirconium nitride is an aluminum-doped mixed silicon/zirconium nitride.

22. The transparent pane according to claim 1 , wherein each layer of an optically highly refractive material arranged between two electrically conductive layers has a thickness from 45 nm to 60 nm.

23. The transparent pane according to claim 1 , wherein the smoothing layer contains a mixed tin/zinc oxide and has a thickness from 3 nm to 20 nm.

24. The transparent pane according to claim 1 , wherein the smoothing layer contains at least one non-crystalline mixed oxide and has a thickness from 4 nm to 12 nm.

25. The transparent pane according to claim 1 , wherein the electrically conductive layer contains at least silver or a silver-containing alloy and has a layer thickness from 10 nm to 20 nm.

26. The transparent pane according to claim 1 , wherein the first matching layer or the second matching layer contains aluminum-doped zinc oxide.

27. The transparent pane according to claim 1 , wherein the first matching layer or the second matching layer contains zinc oxide ZnO 1-δ with 0<δ<0.01 and has a thickness from 4 nm to 12 nm.

28. The transparent pane according to claim 1 , wherein each functional layer includes at least one blocker layer, which is arranged immediately above or immediately below the electrically conductive layer and which contains at least niobium, titanium, nickel, chromium, or alloys thereof, and wherein the blocker layer has a thickness from 0.1 nm to 2nm.

29. The transparent pane according to claim 1 , wherein at least one functional layer includes at least one blocker layer, which is arranged immediately above or immediately below the electrically conductive layer and which contains nickel-chromium alloys, and wherein the blocker layer has a thickness from 0.1 nm to 2 nm.

30. The transparent pane according to claim 1 , wherein at least one functional layer includes at least one blocker layer, which is arranged immediately above or immediately below the electrically conductive layer and which preferably contains at least niobium, titanium, nickel, chromium, or alloys thereof, and wherein the blocker layer has a thickness from 0.1 nm to 0.3 nm.

31. A method comprising:
using the transparent pane according to

Assignees

• Saint Gobain

Inventors

• Schmitz Christoph
• Fischer Klaus
• Janzyk Sebastian
• Neander Marcus
• Billert Ulrich
• Luxembourg David

Classifications

• C03C17/366

  Low-emissivity or solar control coatings · CPC title

• C03C17/3652

  the coating stack containing at least one sacrificial layer to protect the metal from oxidation · CPC title

• G02B1/10

  Optical coatings produced by application to, or surface treatment of, optical elements (G02B1/08 takes precedence) · CPC title

• H05B2203/011

  Heaters using laterally extending conductive material as connecting means · CPC title

• E06B3/66 Primary

  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 title