Coated article with IR reflecting layer and method of making same

Patent metadata

Field	Value
Publication number	US-9403345-B2
Application number	US-201514854282-A
Country	US
Kind code	B2
Filing date	Sep 15, 2015
Priority date	Apr 21, 2008
Publication date	Aug 2, 2016
Grant date	Aug 2, 2016

Abstract

An IG window unit includes a coating supported by a glass substrate. The coating includes at least the following: a dielectric layer comprising silicon nitride; a dielectric layer comprising an oxide of titanium; another dielectric layer; a layer comprising zinc oxide; an infrared (IR) reflecting layer comprising silver on the glass substrate, located over and directly contacting the layer comprising zinc oxide, wherein the coating includes only one IR reflecting layer; and an overcoat comprising (i) a layer comprising tin oxide and (ii) a layer comprising silicon nitride located over and contacting the layer comprising tin oxide. The IG unit may have an SHGC value of at least 0.65, a visible transmission of at least 70%, and/or an Energy Rating of at least 25.

First claim

The invention claimed is:

1. An IG window unit including a coating supported by a glass substrate, the coating from the glass substrate outwardly comprising at least the following:
a dielectric layer comprising silicon nitride;
a dielectric layer comprising an oxide of titanium;
another dielectric layer;
a layer comprising zinc oxide;
an infrared (IR) reflecting layer comprising silver on the glass substrate, located over and directly contacting the layer comprising zinc oxide, wherein the coating includes only one IR reflecting layer;
an overcoat comprising (i) a layer comprising tin oxide and (ii) a layer comprising silicon nitride located over and contacting the layer comprising tin oxide;
wherein the IG unit has an SHGC value of at least 0.65, a visible transmission of at least 70%, and an Energy Rating of at least 25; and
wherein said glass substrate is an interior glass substrate, the IG unit further comprising an exterior glass substrate to be located adjacent an exterior of a building in which the IG unit is provided, wherein the coating is provided on a surface of the interior glass substrate facing a gap between the interior and exterior glass substrates, and wherein the IG unit has, as viewed from an exterior of the building, a reflective a* value of from about −4 to 0 and a reflective b* value of from about −1 to +2.5.

2. The IG unit of claim 1 , wherein the IG unit has an SHGC value of at least 0.68, a visible transmission of at least 74.5%, and an Energy Rating of at least 29.

3. The IG unit of claim 1 , wherein said dielectric layer comprising an oxide of titanium is from 40-120 angstroms thick.

4. The IG unit of claim 1 , wherein said another dielectric layer comprises silicon nitride.

5. The IG unit of claim 4 , wherein said another dielectric layer comprising silicon nitride is located between and directly contacting the layer comprising the oxide of titanium and the layer comprising zinc oxide.

6. The IG unit of claim 1 , wherein the coating further comprising a layer comprising Ni and Cr located over and directly contacting the IR reflecting layer comprising silver.

Assignees

• Guardian Industries
• Centre Luxembourgeois De Rech Pour Le Verre Et La Ceram S A (C R V C )

Inventors

• Lao Jingyu
• Lingle Philip J
• Boyce Brent
• Disteldorf Bernd
• Blacker Richard

Classifications

• C03C2217/219

  CrOx, MoOx, WOx · CPC title

• C03C2217/21

  Oxides · CPC title

• B32B2255/28

  Multiple coating on one surface · CPC title

• E06B3/6715

  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) · CPC title

• B32B2307/304

  Insulating · CPC title