Coated article with low-E coating having absorbing layer over functional layer designed to increase outside reflectance

Patent metadata

Field	Value
Publication number	US-9340452-B2
Application number	US-201514751243-A
Country	US
Kind code	B2
Filing date	Jun 26, 2015
Priority date	Oct 12, 2011
Publication date	May 17, 2016
Grant date	May 17, 2016

Abstract

A coated article includes a low-E coating having an absorbing layer located over a functional layer (IR reflecting layer) and designed to cause the coating to have an increased outside reflectance (e.g., in an IG window unit) and good selectivity. In certain embodiments, the absorbing layer is metallic, or substantially metallic, and is provided directly over and contacting a lower of two IR reflecting layers. In certain example embodiments, a nitride based layer (e.g., silicon nitride or the like) may be located directly over and contacting the absorbing layer in order to reduce or prevent oxidation thereof during heat treatment (e.g., thermal tempering, heat bending, and/or heat strengthening) thereby permitting predictable coloration, high outside reflectance values, and/or good selectivity to be achieved. Coated articles according to certain example embodiments of this invention may be used in the context of insulating glass (IG) window units, vehicle windows, other types of windows, or in any other suitable application.

First claim

The invention claimed is:

1. A coated article including a coating supported by a glass substrate, the coating comprising:
a first transparent dielectric layer supported by the glass substrate;
a first layer comprising zinc oxide supported by the glass substrate and located over and directly contacting the first transparent dielectric layer;
first and second infrared (IR) reflecting layers comprising silver, wherein the first IR reflecting layer is located closer to the glass substrate than is the second IR reflecting layer, and wherein the first IR reflecting layer comprising silver is located over and directly contacting the first layer comprising zinc oxide;
a substantially metallic absorption layer comprising from 0-10% oxygen (atomic %) and from 1-15% nitrogen (atomic %) located over and directly contacting the first IR reflecting layer;
a layer comprising silicon nitride located over and directly contacting the substantially metallic absorption layer;
a layer comprising tin oxide located over the layer comprising silicon nitride;
a second layer comprising zinc oxide located over the layer comprising tin oxide and under the second IR reflecting layer;
an oxided contact layer located over and directly contacting the second IR reflecting layer;
at least one dielectric layer comprising silicon nitride located over the second IR reflecting layer; and
wherein the coated article measured monolithically has a visible transmission of from 35-55% and a glass side visible reflectance of at least 20%, and wherein the glass side visible reflectance is at least 5% higher than a film side visible reflectance of the coated article.

2. The coated article of claim 1 , wherein no high index layer is located between the first IR reflecting layer and the glass substrate.

3. The coated article of claim 1 , wherein the second layer comprising zinc oxide directly contacts the layer comprising tin oxide.

4. An insulating glass (IG) window unit comprising said coated article of claim 1 coupled to another glass substrate with a space therebetween.

5. The IG window unit of claim 4 , wherein the coating is located on an interior surface of the glass substrate to be positioned closest to the sun, and wherein the IG window unit has an outside visible reflectance of from 23-30% and an SHGC of less than 0.25.

6. The coated article of claim 1 , wherein the substantially metallic absorption layer comprises Ni and Cr.

7. The coated article of claim 1 , wherein the substantially metallic absorption layer consists essentially of nitrided NiCr.

8. The coated article of claim 1 , wherein the substantially metallic absorption layer contains from 0-5% oxygen (atomic %).

9. The coated article of claim 1 , wherein the substantially metallic absorption layer is from 25-50 angstroms thick.

10. The coated article of claim 1 , wherein the oxided contact layer is substantially fully oxided.

11. The coated article of claim 1 , wherein the oxided contact layer comprises an oxide of NiCr.

12. The coated article of claim 1 , wherein the substantially metallic absorption layer comprises Zr.

Assignees

• Guardian Industries

Inventors

• O'Connor Kevin
• Lao Jingyu
• Wolff John

Classifications

• G02B5/0875

  the reflecting layers comprising two or more metallic layers · CPC title

• C03C17/3626

  one layer at least containing a nitride, oxynitride, boronitride or carbonitride · CPC title

• C03C17/245

  by deposition from the vapour phase · CPC title

• C03C17/3435 Primary

  comprising a nitride, oxynitride, boronitride or carbonitride · CPC title

• C03C17/366

  Low-emissivity or solar control coatings · CPC title