# US 10,246,372 B2 · Blue colored heat treatable coated article having low solar factor value

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,246,372 B2
- Document ID: US10246372B2
- Status: Granted
- Kind: B2
- Application number: 15/456,771
- Filed: 2017-03-13
- Published: 2017-09-21
- Granted: 2019-04-02
- Earliest claimed: 2016-03-15
- Assignees: Guardian Europe S.A.R.L.; Guardian Glass, LLC
- Applicants: Guardian Glass, LLC; Guardian Europe S.a.r.l.
- Inventors: Bernd Disteldorf; Philip J. Lingle
- Web page: https://patentgrep.com/patent/US10246372B2

## CPC

- C03C 17/3613: {Coatings of type glass/inorganic compound/metal/inorganic compound/metal/other}
- C03C 17/36: at least one coating being a metal
- C03C 17/3618: {Coatings of type glass/inorganic compound/other inorganic layers, at least one layer being metallic}
- C03C 17/3626: {one layer at least containing a nitride, oxynitride, boronitride or carbonitride}
- C03C 17/3639: {Multilayers containing at least two functional metal layers}
- C03C 17/3642: {the multilayer coating containing a metal layer}
- C03C 17/3649: {made of metals other than silver}
- C03C 17/366: {Low-emissivity or solar control coatings}
- C03C 17/3681: {the multilayer coating being used in glazing, e.g. windows or windscreens}
- C23C 14/0036: {Reactive sputtering}
- C23C 14/0652: {Silicon nitride}
- C23C 14/185: {by cathodic sputtering}
- C23C 14/352: {using more than one target (C23C14/56 takes precedence)}
- G02B 5/208: {for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation}
- G02B 5/26: Reflecting filters (G02B5/28 takes precedence)
- C03C 2217/281: Nitrides
- C03C 2218/155: by reactive sputtering
- C03C 2218/156: by magnetron sputtering
- 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
- C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04)
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

There are provided coated articles that include two or more infrared (IR) reflecting layers (e.g., of or including NbZr, Nb, NiCr, NiCrMo, and/or a nitride thereof) sandwiched between at least dielectric layers, and/or a method of making the same. The coating may be designed so that the coated articles realize blue glass side reflective coloration in combination with a low glass side visible reflectance, acceptable film side coloration, and low solar factor (SF) and/or a low solar heat gain coefficient (SHGC). Such coated articles may be used in the context of monolithic windows, insulating glass (IG) window units, laminated windows, and/or other suitable applications, and may optionally be heat treated (e.g., thermally tempered) in certain instances.

## Claims

### Claim 1

A coated article having blue glass side reflective coloration and including a layer system supported by a glass substrate, the layer system comprising:
a first dielectric layer comprising silicon nitride;
a first infrared (IR) reflecting layer comprising NbZr on the glass substrate over at least the first dielectric layer comprising silicon nitride;
a second dielectric layer comprising silicon nitride on the glass substrate over at least the first dielectric layer comprising silicon nitride and the first IR reflecting layer comprising NbZr;
a second layer IR reflecting layer comprising NbZr on the glass substrate over at least the second dielectric layer comprising silicon nitride;
wherein the second dielectric layer comprising silicon nitride is located directly between and contacting the first and second IR reflecting layers comprising NbZr;
a third dielectric layer comprising silicon nitride on the glass substrate over at least the second IR reflecting layer comprising NbZr;
wherein the coated article contains no metallic infrared (IR) reflecting layer based on Ag and/or Au, and wherein the IR reflecting layers do not physically contact any other metallic or substantially metallic layer; and
wherein the coated article: has glass side visible reflectance of no greater than 18%, a film side/interior reflective a* color value of −2 to +12, glass side/exterior reflective blue coloration comprising a glass side/exterior b* color value of from −8.0 to −30.0; and (i) if measured monolithically has an SF value of no greater than 0.35 and an SHGC value of no greater than 0.40, and/or (ii) if an insulating glass (IG) window unit having two glass substrates has an SF value of no greater than 0.25 and an SHGC value of no greater than 0.27.

### Claim 2 (depends on 1)

The coated article of claim 1, wherein the coated article has a glass side/exterior b* value of from −11.0 to −19.0.

### Claim 3 (depends on 1)

The coated article of claim 1, wherein the coated article has a glass side/exterior a* value of from −7.0 to +7.0.

### Claim 4 (depends on 1)

The coated article of claim 1, wherein the coated article (i) if measured monolithically has an SF value of no greater than 0.33 and an SHGC value of no greater than 0.38, and/or (ii) if an insulating glass (IG) window unit having two glass substrates has an SF value of no greater than 0.23 and an SHGC value of no greater than 0.25.

### Claim 5 (depends on 1)

The coated article of claim 1, wherein the coated article has a film side/interior reflective a* value of from 0 to +8.0.

### Claim 6 (depends on 1)

The coated article of claim 1, wherein at least one of the first and second IR reflecting layers comprising NbZr are nitrided.

### Claim 7 (depends on 1)

The coated article of claim 1, wherein each of the first and second IR reflecting layers comprising NbZr includes more Nb than Zr based on an atomic percentage.

### Claim 8 (depends on 1)

The coated article of claim 1, wherein the coated article is heat treated and has a ΔE* value (glass side reflective) of no greater than 3.0 after and/or due to heat treatment.

### Claim 9 (depends on 1)

The coated article of claim 1, wherein the coated article has a visible transmission of from 10-18%.

### Claim 10 (depends on 1)

The coated article of claim 1, wherein at least one of the first and second layers IR reflecting layers is/are substantially free of oxygen.

### Claim 11 (depends on 1)

The coated article of claim 1, wherein the coating further comprising an overcoat layer comprising an oxide of zirconium.

### Claim 12 (depends on 1)

The coated article of claim 1, wherein the coating includes only two IR reflecting layers and consists essentially of the first dielectric layer comprising silicon nitride, the first infrared (IR) reflecting layer comprising NbZr, the second dielectric layer comprising silicon nitride, the second layer IR reflecting layer comprising NbZr, and third dielectric layer comprising silicon nitride, and optionally an overcoat layer comprising an oxide of zirconium.

### Claim 13 (depends on 1)

The coated article of claim 1, wherein the first dielectric layer is thicker than the second dielectric layer by at least 100 Å.

### Claim 14 (depends on 1)

The coated article of claim 1, wherein the second dielectric layer is thicker than the third dielectric layer by at least 100 Å.

### Claim 15 (depends on 1)

The coated article of claim 1, wherein a thickness ratio of the first dielectric layer/third layer is at least 5.

### Claim 16 (depends on 1)

The coated article of claim 1, wherein the first IR reflecting layer is thicker than the second IR reflecting layer by at least 20 Å.

### Claim 17 (depends on 1)

The coated article of claim 1, wherein the coating further comprises:
a third IR reflecting layer comprising NbZr on the glass substrate over at least the third dielectric layer comprising silicon nitride; and
a fourth dielectric layer comprising silicon nitride on the glass substrate over at least the third IR reflecting layer comprising NbZr.

### Claim 18 (depends on 1)

The coated article of claim 1, wherein the coating has two or more of the following features: (a) a thickness ratio of the third dielectric layer/first dielectric layer is at least 2; (b) a thickness ratio of the fourth dielectric layer/first dielectric layer is at least 2; (c) the second dielectric layer is thicker than the fourth dielectric layer by at least 50 Å; (d) the third IR reflecting layer is at least 1.5 times as thick as the second IR reflecting layer; and (e) the third IR reflecting layer is at least 1.25 times as thick as the first IR reflecting layer.

### Claim 19 (depends on 1)

The coated article of claim 1, wherein the coating has three or more of the following features: (a) a thickness ratio of the third dielectric layer/first dielectric layer is at least 2; (b) a thickness ratio of the fourth dielectric layer/first dielectric layer is at least 2; (c) the second dielectric layer is thicker than the fourth dielectric layer by at least 50 Å; (d) the third IR reflecting layer is at least 1.5 times as thick as the second IR reflecting layer; and (e) the third IR reflecting layer is at least 1.25 times as thick as the first IR reflecting layer.

### Claim 20

A coated article having blue glass side reflective coloration and including a layer system supported by a glass substrate, the layer system comprising:
a first dielectric layer comprising nitrogen;
a first infrared (IR) reflecting layer on the glass substrate over at least the first dielectric layer;
a second dielectric layer comprising nitrogen on the glass substrate over at least the first dielectric layer and the first IR reflecting layer;
a second layer IR reflecting layer on the glass substrate over at least the second dielectric layer;
a third dielectric layer comprising nitrogen on the glass substrate over at least the second IR reflecting layer;
wherein each of the first and second IR reflecting layers comprises one or more of: NbZr, NbZrNx, NiCr, NiCrNx, NiCrMo, NiCrMoNx, NbCr, NbCrNx, Nb and NbNx;
wherein the coated article contains no metallic infrared (IR) reflecting layer based on Ag and/or Au, and wherein the IR reflecting layers do not physically contact any other metallic or substantially metallic layer; and
wherein the coated article: has glass side visible reflectance of no greater than 18%, a film side/interior reflective a* color value of −2 to +12, glass side/exterior reflective blue coloration comprising a glass side/exterior b* color value of from −8.0 to −30.0; and (i) if measured monolithically has an SF value of no greater than 0.35 and an SHGC value of no greater than 0.40, and/or (ii) if an insulating glass (IG) window unit having two glass substrates has an SF value of no greater than 0.25 and an SHGC value of no greater than 0.27.