Coated article with IR reflecting layer(s) and method of making same

• US 9,090,504 B2
• Filed: 05/13/2008
• Issued: 07/28/2015
• Est. Priority Date: 11/05/2004
• Status: Active Grant

• Current Assignee: Guardian Glass LLC (KOCH Industries Incorporated)
• Original Assignee: Centre Luxembourgeois de Recherches pour le Verre et la Ceramique SA, Guardian Industries Corporation (KOCH Industries Incorporated)
• Inventors: Butz, Jochen, Kriltz, Uwe, Siwek, Artur, Dietrich, Anton, Mller, Jens-Peter, Lemmer, Jean-Marc, Blacker, Richard
• Primary Examiner(s): Turocy, David
• Assistant Examiner(s): Miller, Michael G
• Application Number:
  US12/153,057
• Publication Number:
  US 20080220160A1
• Time in Patent Office: 2,632 Days
• Field of Search: 427160-169
• US Class Current: 1/1
• CPC Class Codes: B32B 17/06 comprising glass as the main or only constituent of a layer, next to another layer of a specific material
• CPC Class Codes: B32B 2255/205 Metallic coating
• CPC Class Codes: B32B 2255/26 Polymeric coating
• CPC Class Codes: B32B 2307/204 Di-electric
• CPC Class Codes: B32B 2307/416 Reflective
• CPC Class Codes: B32B 2315/08 Glass
• CPC Class Codes: B32B 2551/00 Optical elements
• CPC Class Codes: B32B 37/18 involving the assembly of discrete sheets or panels only
• 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 17/3639 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 17/3652 the coating stack containing at least one sacrificial layer to protect the metal from oxidation
• CPC Class Codes: C03C 17/3657 the multilayer coating having optical properties
• CPC Class Codes: C03C 17/366 Low-emissivity or solar control coatings
• CPC Class Codes: C03C 17/3668 the multilayer coating having electrical properties
• CPC Class Codes: C03C 17/3681 the multilayer coating being used in glazing, e.g. windows or windscreens
• CPC Class Codes: C03C 17/3694 one layer having a composition gradient through its thickness
• CPC Class Codes: C03C 2217/70 : Properties of coatings
• CPC Class Codes: C03C 2217/78 : Coatings specially designed to be durable, e.g. scratch-resistant
• CPC Class Codes: C03C 2218/154 : by sputtering
• CPC Class Codes: C23C 14/18 : on other inorganic substrates
• CPC Class Codes: C23C 14/34 : Sputtering
• 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

Abstract

A coated article is provided with at least one infrared (IR) reflecting layer. The IR reflecting layer may be of silver or the like. In certain example embodiments, a titanium oxide layer is provided over the IR reflecting layer, and it has been found that this surprisingly results in an IR reflecting layer with a lower specific resistivity (SR) thereby permitting thermal properties of the coated article to be improved.

Claims

1. A method of making a coated article, the method comprising:

providing a glass substrate;

forming a dielectric layer on the substrate;

forming an IR reflecting layer comprising silver on the substrate over at least the dielectric layer;

depositing a layer comprising titanium oxide on the substrate over and directly physically contacting the IR reflecting layer in a manner so that the layer comprising titanium oxide as deposited is more oxided at a location therein further from the IR reflecting layer than at a location closer to the IR reflecting layer.

2. The method of claim 1, further comprising coupling the glass substrate with the recited layers thereon to another substrate in forming an IG window unit, wherein the IG window unit has a U-value of no greater than 1.15 W/(m²K).

3. The method of claim 1, wherein the IR reflecting layer comprising silver has a specific resistivity (SR) of no greater than 4.6 micro-ohms·

cm.

4. A method of making a coated article according to claim 1, wherein the IR reflecting layer comprising silver has a specific resistivity (SR) of no greater than 4.8 micro-ohms·

cm.