Transparent pane with electrically conductive coating

• US 10,464,292 B2
• Filed: 11/21/2017
• Issued: 11/05/2019
• Est. Priority Date: 12/17/2012
• Status: Active Grant

• Current Assignee: Saint-Gobain Glass France (Compagnie De Saint-Gobain)
• Original Assignee: Saint-Gobain Glass France (Compagnie De Saint-Gobain)
• Inventors: Fischer, Klaus, Janzyk, Sebastian, Weissler, Ariane
• Primary Examiner(s): Chang, Audrey Y
• Application Number:
  US15/820,300
• Publication Number:
  US 20180099485A1
• Time in Patent Office: 714 Days
• Field of Search: 359360, 359265, 359585, 359275, 428 34, 428216
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10183 being not continuous, e.g. in edge regions
• CPC Class Codes: B32B 17/10229 Metallic layers sandwiched by dielectric layers
• CPC Class Codes: B32B 17/10761 containing vinyl acetal
• 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 17/3636 one layer at least containing silicon, hydrogenated silicon or a silicide
• 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 17/3652 the coating stack containing at least one sacrificial layer to protect the metal from oxidation
• CPC Class Codes: C03C 17/3673 specially adapted for use in heating devices for rear window of vehicles
• CPC Class Codes: C23C 14/34 Sputtering
• 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: H05B 2203/013 Heaters using resistive films or coatings
• CPC Class Codes: H05B 3/86 the heating conductors being embedded in the transparent or reflecting material H05B3/845 takes precedence
• CPC Class Codes: H05K 1/0274 Optical details, e.g. printed circuits comprising integral optical means H05K1/0269 takes precedence; coupling light guides with opto-electronic components G02B6/42

Abstract

A transparent pane having at least one transparent substrate and at least one an electrically conductive coating on at least one surface of the transparent substrate. The electrically conductive coating has at least two functional layers arranged one on top of another. Each functional layer contains: a layer of optically highly refractive material; a smoothing layer above the layer of optically highly refractive material; a lower adapting (matching) layer above the smoothing layer; an electrically conductive layer above the lower adapting layer; and an upper adapting (matching) layer above the electrically conductive layer. The lower adapting layer and/or the upper adapting layer contain a homogeneously distributed getter material. At least one lower adapting layer and/or upper adapting layer containing the getter material is in direct contact with the electrically conductive layer.

Claims

1. A transparent pane, comprising:

at least one transparent substrate; and

at least one electrically conductive coating on at least one surface of the at least one transparent substrate,

wherein each at least one electrically conductive coating has at least two functional layers arranged one above the other,

wherein each functional layer includes

a layer of an optically highly refractive material having a refractive index greater than or equal to 2.1,

a smoothing layer containing at least one non-crystalline oxide and being arranged above the layer of an optically highly refractive material,

a lower matching layer arranged above the smoothing layer,

an electrically conductive layer arranged above the lower matching layer, and

an upper matching layer arranged above the electrically conductive layer,

wherein at least one of the lower matching layer and the upper matching layer contains a homogeneously distributed getter material selected from the group consisting of niobium, titanium, barium, magnesium, tantalum, zirconium, thorium, palladium, platinum, and alloys thereof in a concentration from 3 wt.-% to 10 wt.-%, and

wherein the electrically conductive layer is in direct contact with at least one of a lower matching layer containing the getter material or an upper matching layer containing the getter material.

2. The transparent pane according to claim 1, wherein at least one of the lower matching layer and the upper matching layer contains the getter material in a concentration from 3 wt.-% to 7 wt.-%.

3. The transparent pane according to claim 1, wherein the total layer thickness of all electrically conductive layers is from 32 nm to 75 nm.

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

5. The transparent pane according claim 1, wherein the layer of an optically highly refractive material contains aluminum-doped mixed silicon/zirconium nitride.

6. The transparent pane according 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.

7. The transparent pane according to claim 1, wherein the at least one non-crystalline mixed oxide contained in the smoothing layer includes a mixed tin/zinc oxide.

8. The transparent pane according to claim 7, wherein the mixed tin/zinc oxide is antimony-doped mixed tin/zinc oxide.

9. The transparent pane according to claim 1, wherein the smoothing layer has a thickness from 3 nm to 20 nm.

10. The transparent pane according claim 1, wherein the electrically conductive layer contains at least one of silver and a silver-containing alloy.

11. The transparent pane according claim 1, wherein the electrically conductive layer has a layer thickness from 8 nm to 25 nm.

12. The transparent pane according claim 1, wherein the electrically conductive layer has a layer thickness from 10 nm to 20 nm.

13. The transparent pane according claim 1, wherein at least one of the lower matching layer and the upper matching layer contains zinc oxide ZnO_1-δ

with 0<

δ

<

0.01.

14. The transparent pane according claim 1, wherein at least one of the lower matching layer and the upper matching layer has a thickness from 3 nm to 20 nm.

15. The transparent pane according claim 1, wherein a cover layer is arranged above the uppermost functional layer.

16. The transparent pane according claim 15, wherein the cover layer contains at least one optically highly refractive material with a refractive index greater than or equal to 2.1.

17. The transparent pane according claim 16, wherein the at least one optically highly refractive material is a mixed silicon/metal nitride.

18. The transparent pane according claim 1, wherein the transparent substrate is bonded via at least one laminating film to a second pane to form a composite pane.

19. The transparent pane according claim 18, wherein the total transmittance of the composite pane is greater than 70%.

20. A method of using a transparent pane, comprising:

providing the transparent pane of claim 1; and

installing the transparent pane as at least one pane or a component of a pane or as component of a composite pane in a building or in a means of transportation for travel on land, in the air, or on water.

21. A method for producing a transparent pane with an electrically conductive coating, comprising:

applying at least two functional layers one after another on a transparent substrate; and

applying within each functional layer one after another at least

a) a layer of an optically highly refractive material with a refractive index greater than or equal to 2.1,

b) a smoothing layer containing at least one non-crystalline oxide,

c) a lower matching layer,

d) an electrically conductive layer, and

e) an upper matching layer,

wherein at least one of the lower matching layer and the upper matching layer is applied simultaneously with a getter material contained therein deposited by cathode ray sputtering of a ceramic target containing 3 wt.-% to 10 wt.-% of the getter material.

22. A method for producing a transparent pane according to claim 21, wherein at least one of the lower matching layer and the upper matching layer are deposited by cathode ray sputtering of a ceramic target containing 3 wt.-% to 7 wt.-% of the getter material.

23. A method for producing a transparent pane according to claim 21, wherein the electrically conductive coating is connected to at least two busbars, the transparent substrate and a second pane are heated to a temperature from 500°

C. to 700°

C., and the transparent substrate and the second pane are congruently bonded to a laminating film.