# US 9,517,970 B2 · Transparent glass substrate having a coating of consecutive layers

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- Number: US 9,517,970 B2
- Document ID: US9517970B2
- Status: Granted
- Kind: B2
- Application number: 14/119,332
- Filed: 2012-05-23
- Published: 2014-03-27
- Granted: 2016-12-13
- Earliest claimed: 2011-05-24
- Assignees: Agc Glass Europe
- Applicants: Eric Tixhon; Delphine Didier
- Inventors: Eric Tixhon; Delphine Didier
- Web page: https://patentgrep.com/patent/US9517970B2

## CPC

- C03C 17/3417: {all coatings being oxide coatings}
- C03C 17/3435: {comprising a nitride, oxynitride, boronitride or carbonitride}
- C03C 17/366: {Low-emissivity or solar control coatings}
- 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)}
- B32B 17/10211: {Doped dielectric layer, electrically conductive, e.g. SnO2:F}
- B32B 17/1022: {Metallic coatings}
- C03C 2217/94: Transparent conductive oxide layers [TCO] being part of a multilayer coating
- 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)}
- Y10T 428/24975: No layer or component greater than 5 mils thick
- C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- E06B: FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES (shades or blinds for greenhouses A01G9/22; curtains A47H; lids for car boots or bonnets B62D25/10; skylights E04B7/18; sunshades, awnings E04F10/00)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## 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

### Claim 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 SiOx, 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.

### Claim 2 (depends on 1)

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

### Claim 3 (depends on 1)

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 SiOxCy, or silicon oxynitride SiOxNy,
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.

### Claim 4 (depends on 1)

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 SiOxCy, or silicon oxynitride SiOxNy,
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.

### Claim 5 (depends on 1)

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.

### Claim 6 (depends on 1)

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

### Claim 7 (depends on 1)

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

### Claim 8 (depends on 1)

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%.

### Claim 9 (depends on 8)

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

### Claim 10 (depends on 8)

The double glazing unit according to claim 8, wherein the glazing unit has a value for Δa*b* of 3.5 at most.

### Claim 11 (depends on 8)

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.

### Claim 12 (depends on 1)

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%.

### Claim 13 (depends on 12)

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%.

### Claim 14 (depends on 12)

The triple glazing unit according to claim 12, wherein the glazing unit has a value for Δa*b* of 3.5 at most.

### Claim 15 (depends on 12)

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.

### Claim 16 (depends on 1)

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

### Claim 17 (depends on 1)

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

### Claim 18 (depends on 11)

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

### Claim 19 (depends on 15)

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