Ruggedized switchable glazing, and/or method of making the same

• US 8,665,384 B2
• Filed: 05/17/2012
• Issued: 03/04/2014
• Est. Priority Date: 11/26/2007
• Status: Expired due to Fees

• Current Assignee: Guardian Glass LLC (KOCH Industries Incorporated)
• Original Assignee: Guardian Industries Corporation (KOCH Industries Incorporated)
• Inventors: Veerasamy, Vijayen S.
• Primary Examiner(s): Glick, Edward
• Assistant Examiner(s): Kim, Dennis Y
• Application Number:
  US13/473,869
• Publication Number:
  US 20120293862A1
• Time in Patent Office: 656 Days
• Field of Search: 349/16, 359/614, 428/1.6, 428/1.62, 428/426
• US Class Current: 349/16
• CPC Class Codes: B32B 17/10005 laminated safety glass or glazing
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10055 with at least one intermediate air space
• CPC Class Codes: B32B 17/10229 Metallic layers sandwiched by dielectric layers
• CPC Class Codes: B32B 17/10504 Liquid crystal layer
• CPC Class Codes: B32B 17/10761 containing vinyl acetal
• CPC Class Codes: B32B 17/10788 containing ethylene vinylacetate
• CPC Class Codes: B32B 2367/00 Polyesters, e.g. PET, i.e. polyethylene terephthalate
• CPC Class Codes: C03C 17/36 at least one coating being a metal
• 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 17/3681 the multilayer coating being used in glazing, e.g. windows or windscreens
• CPC Class Codes: C09K 2323/061 Inorganic, e.g. ceramic, metallic or glass
• CPC Class Codes: G02F 1/1334 based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
• CPC Class Codes: G02F 2201/086 UV absorbing

Abstract

A coated article includes a low-E coating supported by a substrate (e.g., glass substrate), the low-E coating including first and second IR reflecting layers comprising silver and/or gold, and at least one UV blocking layer that blocks significant amounts of UV light having a wavelength of from 380-400 nm so that no more than about 20% of light having a wavelength of from 380-400 passes through the low-E coating. The UV blocking layer may be positioned so as to not directly contact the first and second IR reflecting layers.

Claims

1. A coated article including a low-E coating supported by a substrate, the low-E coating comprising:

first and second infrared (IR) reflecting layers comprising silver and/or gold;

at least one UV blocking layer that blocks significant amounts of UV light having a wavelength of from 380-400 nm so that no more than about 20% of light having a wavelength of from 380-400 nm passes through the low-E coating;

wherein the UV blocking layer is disposed between the first and second IR reflecting layers, but is positioned so as to not directly contact the first and second IR reflecting layers, and

wherein the at least one UV blocking layer is between and in contact with a first and a second tin oxide layer.

2. The coated article of claim 1, further comprising a first dielectric layer provided between the UV blocking layer and the first IR reflecting layer, and a second dielectric layer provided between the UV blocking layer and the second IR reflecting layer.

3. The coated article of claim 1, wherein the UV blocking layer comprises zinc oxide doped with bismuth.

4. The coated article of claim 1, wherein the UV blocking layer comprises bismuth oxide.

5. The coated article of claim 1, wherein no more than about 15% of light having a wavelength of from 380-400 nm passes through the low-E coating.

6. The coated article of claim 1, wherein no more than about 10% of light having a wavelength of from 380-400 nm passes through the low-E coating.

7. The coated article of claim 1, wherein a dielectric layer is disposed between the first and second IR reflecting layers, and the dielectric layer is split such that the UV blocking layer is disposed between the first and second portions of the dielectric layer.

8. The coated article of claim 1, further comprising at least one lower contact layer disposed under and contacting at least one of the IR reflecting layers, and at least one upper contact layer disposed over and contacting the at least one of the IR reflecting layers, wherein the lower contact layer is oxided to a lesser extent than the upper contact layer.

9. A coated article including a low-E coating supported by a substrate, the low-E coating comprising, moving away from the substrate:

a first infrared (IR) reflecting layer comprising silver and/or gold;

a dielectric layer comprising first and second portions;

a second IR reflecting layer comprising silver and/or gold;

wherein the dielectric layer is split such that at least one UV blocking layer that blocks significant amounts of UV light having a wavelength of from 380-400 nm so that no more than about 20% of light having a wavelength of from 380-400 nm passes through the low-E coating is disposed between the first and second portions of the dielectric layer, and wherein

the at least one UV blocking layer is between and in contact with a first and a second tin oxide layer.

10. The coated article of claim 9, wherein the UV blocking layer comprises bismuth oxide.

11. The coated article of claim 9, wherein the UV blocking layer comprises bismuth-doped zinc oxide.

12. The coated article of claim 9, wherein the UV blocking layer comprises silver oxide.

13. A coated article including a low-E coating supported by a substrate, the low-E coating comprising:

a first infrared (IR) reflecting layer comprising silver and/or gold;

at least one UV blocking layer that blocks significant amounts of UV light having a wavelength of from 380-400 nm so that no more than about 20% of light having a wavelength of from 380-400 nm passes through the low-E coating;

a lower contact layer;

a second IR reflecting layer comprising silver and/or gold; and

an upper contact layer, wherein the upper contact layer is more oxided than the lower contact layer;

wherein the UV blocking layer is positioned so as to not directly contact the first and second IR reflecting layers, and

wherein the at least one UV blocking layer is between and in contact with a first and a second tin oxide layer.