GLASS SUBSTRATE WITH INTERFERENCE COLOURATION FOR A FACING PANEL

• US 20130120842A1
• Filed: 07/29/2011
• Published: 05/16/2013
• Est. Priority Date: 07/29/2010
• Status: Active Grant

• Current Assignee: AGC Glass Europe SA (AGC, Inc.)
• Original Assignee: AGC Glass Europe SA (AGC, Inc.)
• Inventors: Moens, Vincent, Mahieu, Stijn
• Granted Patent: US 9,310,542 B2
• Time in Patent Office: Days
• US Class Current: 359/585
• CPC Class Codes: C03C 17/36 at least one coating being a metal
• CPC Class Codes: C03C 17/3613 Coatings of type glass/inorganic compound/metal/inorganic compound/metal/other
• CPC Class Codes: C03C 17/3626 one layer at least containing a nitride, oxynitride, boronitride or carbonitride
• CPC Class Codes: C03C 17/3634 one layer at least containing carbon, a carbide or oxycarbide
• 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 17/3649 made of metals other than silver
• CPC Class Codes: C03C 17/3657 the multilayer coating having optical properties
• CPC Class Codes: C03C 17/3681 the multilayer coating being used in glazing, e.g. windows or windscreens
• CPC Class Codes: C03C 17/3684 the multilayer coating being used for decoration purposes
• CPC Class Codes: C03C 2217/72 Decorative coatings
• CPC Class Codes: G02B 5/285 comprising deposited thin solid films G02B5/281 - G02B5/289 take precedence; multilayered film filters for fibre optic multiplexing G02B6/29361

Abstract

The invention relates to a glass substrate with interference colouration for a facing panel, comprising a glass sheet covered on one of the faces thereof by a stack of coatings including successively at least: a first transparent coating made from a dielectric material having an optical thickness at least greater than or equal to 5 nm and at most less than or equal to 258 nm; a semi-transparent functional coating having a geometric thickness at least greater than or equal to 0.1 nm and at most less than or equal to 50 nm; a second transparent coating made from a dielectric material and having an optical thickness at least greater than or equal to 20 nm and at most less than or equal to 300 nm; and a coating providing opacity or quasi-opacity and having a geometric thickness at least greater than or equal to 30 nm.

Claims

1. A glass substrate, comprising a glass sheet and a stack of coatings covering a face of the glass sheet, wherein the stack of coatings comprises in succession from the glass sheet:

a first transparent coating comprising a dielectric material with an optical thickness of 5.0 nm or more and 258.0 nm or less,

a semi-transparent functional coating with a geometric thickness of 0.1 nm or more and 50.0 nm or less,

a second transparent coating comprising a dielectric material with an optical thickness of 20.0 nm or more and 300.0 nm or less, and

a coating, comprising a metal, metalloid, nitride, carbide, or any combination thereof, capable of providing opacity or quasi-opacity of the stack,

wherein a geometric thickness of the coating comprising the metal, metalloid, nitride, carbide, or combination thereof is 30.0 nm or more, and

the glass substrate has interference coloration and is suitable for a facing panel.

2. The glass substrate of claim 1,

wherein the semi-transparent functional coating is a metallic coating with a color attenuation thickness of 0.3 nm or more and 30.0 nm or less, and

the color attenuation thickness is a product of the geometric thickness of the functional coating multiplied by a complex part, k, of a refractive index at 550 nm of a metal in the coating.

3. The glass substrate of claim 1, wherein the semi-transparent functional coating and the coating comprising the metal, metalloid, nitride, carbide, or combination thereof are metallic coatings.

4. The glass substrate of claim 1, wherein the glass sheet consists of a clear silica soda lime glass.

5. The glass substrate of claim 1, further comprising:

a protective coating with a geometric thickness of 5.0 nm or more above the coating comprising the metal, metalloid, nitride, carbide, or combination thereof.

6. The glass substrate as claimed in claim 5, wherein the protective coating comprises a layer comprising at least one selected from the group consisting of carbon, chromium, nickel, aluminum, stainless steel, and a metal alloy.

7. The glass substrate of claim 1, further comprising:

a further coating comprising a transparent dielectric material, between the glass sheet and the first transparent coating,

wherein the further coating is configured to improve adhesion.

8. The glass substrate of claim 1, wherein the coating comprising the metal, metalloid, nitride, carbide, or combination thereof comprises a layer having a chemical composition of a layer of the semi-transparent functional coating.

9. The glass substrate of claim 7,

wherein the further coating comprises silicon oxynitride and has a geometric thickness of 0.0 nm or more and 50.0 nm or less,

the dielectric material of the first transparent coating is silicon nitride,

a geometric thickness of the first transparent coating is 10.0 nm or more and 129.0 nm or less,

the semi-transparent functional coating is a metallic functional coating with a color attenuation thickness of 0.3 nm or more and 30.0 nm or less,

the color attenuation thickness is a product of the geometric thickness of the functional coating multiplied by a complex part, k, of a refractive index at 550 nm of a metal in the coating,

the second transparent coating comprises, as a dielectric material, silicon nitride,

a geometric thickness of the second transparent coating is 10.0 nm or more and 150.0 nm or less, and

the coating comprising the metal, metalloid, nitride, carbide, or combination thereof is a metallic coating comprising a layer of stainless steel.

10. The glass substrate as claimed in claim 8,

wherein the first transparent coating comprises silicon nitride and has a geometric thickness of between 10.0 nm and 120.0 nm,

the semi-transparent functional coating is a metallic coating of titanium,

the geometric thickness of the semi-transparent functional coating is from 1.0 nm to 10.0 nm,

the second transparent coating comprises silicon nitride and has a geometric thickness of from 20.0 nm to 120.0 nm,

the coating comprising the metal, metalloid, nitride, carbide, or combination thereof comprises a first layer of titanium.

11. The glass substrate as claimed in claim 9,

wherein the semi-transparent functional coating comprises stainless steel,

the geometric thickness of the semi-transparent functional coating is from 0.1 nm to 10.0 nm, and

the geometric thickness of the coating comprising the metal, metalloid, nitride, carbide, or combination thereof is 30.0 nm or more and 1000.0 nm or less.

12. The glass substrate of claim 5, wherein the glass substrate is toughenable.

13. A facade, comprising:

an opaque zone comprising the glass substrate of claim 9, and

a viewing zone comprising a laminated glazing,

wherein the glass substrate has the same color characteristics after toughening as those of the laminated glazing,

the glass substrate and the laminated glazing each comprise coatings on a glass sheet, and

the glass sheet of the glass substrate and the glass sheet of the laminated glazing have identical chemical composition.

14. A method for manufacturing the glass substrate of claim 1, the method comprising:

depositing the first transparent dielectric coating by magnetic field-assisted vacuum cathode sputtering,

depositing the semi-transparent functional coating by magnetic field-assisted vacuum cathode sputtering,

depositing the second transparent dielectric coating by magnetic field-assisted vacuum cathode sputtering, and

depositing the coating comprising the metal, metalloid, nitride, carbide, or combination thereof by magnetic field-assisted vacuum cathode sputtering.

15. A facade facing panel comprising the glass substrate of claim 1.

16. The glass substrate of claim 6, wherein the protective coating comprises a layer of NiCr or NiCrAlY.

17. The glass substrate of claim 11, wherein the layer of stainless steel in the coating comprising the metal, metalloid, nitride, carbide, or combination thereof is a first layer in the coating comprising the metal, metalloid, nitride, carbide, or combination thereof.

18. the glass substrate of claim 11, wherein the geometric thickness of the coating comprising the metal, metalloid, nitride, carbide, or combination thereof is 50.0 nm or more and 1000.0 nm or less.

19. the glass substrate of claim 18, wherein the geometric thickness of the coating comprising the metal, metalloid, nitride, carbide, or combination thereof is 100.0 nm or more and 200.0 nm or less.