Window with anti-bacterial and/or anti-fungal feature and method of making same

• US 7,892,662 B2
• Filed: 04/27/2006
• Issued: 02/22/2011
• Est. Priority Date: 04/27/2006
• 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., Thomsen, Scott V., Nunez-Regueiro, Jose
• Primary Examiner(s): McNeil; Jennifer C
• Assistant Examiner(s): COLGAN, LAUREN ROBINSON
• Application Number:
  US11/412,118
• Publication Number:
  US 20070254163A1
• Time in Patent Office: 1,762 Days
• Field of Search: 428/432, 428/336, 428/689, 428/699, 428/702, 428/433, 428/693.1, 428/701
• US Class Current: 428/701
• CPC Class Codes: C03C 17/36 at least one coating being a metal
• CPC Class Codes: C03C 17/361 Coatings of the type glass/metal/inorganic compound/metal/inorganic compound/other
• CPC Class Codes: C03C 17/3615 Coatings of the type glass/metal/other inorganic layers, at least one layer being non-metallic
• 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 17/3644 the metal being silver
• CPC Class Codes: C03C 2204/02 Antibacterial glass, glaze or enamel
• CPC Class Codes: C03C 2217/425 consisting of a porous layer
• CPC Class Codes: C03C 2217/71 Photocatalytic coatings
• CPC Class Codes: C03C 2217/75 Hydrophilic and oleophilic coatings
• CPC Class Codes: C03C 2217/78 Coatings specially designed to be durable, e.g. scratch-resistant
• CPC Class Codes: Y10T 428/24997 Of metal-containing material
• CPC Class Codes: Y10T 428/325 Magnetic layer next to second metal compound-containing layer

Abstract

Certain example embodiments of this invention relate to a window having anti-fungal/anti-bacterial properties and/or self-cleaning properties, and a method of making the same. In certain example embodiments, a silver based layer is be provided and the layer(s) located thereover (e.g., the zirconium oxide inclusive layer) are designed to permit silver particles to migrate/diffuse to the surface over time to kill bacteria/germs at the surface of the coated article thereby creating an anti-bacterial/anti-fungal effect. In certain example embodiments, silver may also or instead be mixed in with other material as the top layer of the anti-bacterial coating.

Claims

1. A coated article including a coating supported by a glass substrate, the coating comprising:

a layer comprising silver on the glass substrate;

a layer comprising zirconium oxide (Zr_xO_y), where y/x is from about 1.2 to 2.5, on the glass substrate over at least the layer comprising silver;

a photocatalytic layer comprising an anatase oxide of titanium on the glass substrate over at least the layer comprising silver and the layer comprising zirconium oxide; and

wherein each of the layer comprising zirconium oxide and the photocatalytic layer comprising the anatase oxide of titanium are porous so as to permit silver from the layer comprising silver to migrate and/or diffuse to the outwardmost surface of the coated article over time.

2. The coated article of claim 1, wherein the index of refraction of the layer comprising zirconium oxide substantially matches that of the photocatalytic layer comprising the oxide of titanium.

3. The coated article of claim 1, wherein the layer comprising zirconium oxide has a refractive index of from 2.0 to 2.1, and wherein the refractive index of the photocatalytic layer comprising the oxide of titanium does not differ from the refractive index of the layer comprising zirconium oxide by more than 0.1.

4. The coated article of claim 1, wherein the layer comprising zirconium oxide has tensile stress.

5. The coated article of claim 1, wherein the coated article is heat treated so that the glass substrate is thermally tempered.

6. The coated article of claim 1, further comprising a metal oxide dielectric film on the glass substrate that is located between the glass substrate and the layer comprising silver.

7. The coated article of claim 1, wherein the coated article is a window and has a visible transmission of at least about 50%.

8. The coated article of claim 1, wherein the photocatalytic layer comprising the anatase oxide of titanium further comprises silver.

9. The coated article of claim 1, wherein the layer comprising zirconium oxide further comprises nitrogen.

10. The coated article of claim 1, wherein the layer comprising zirconium oxide comprises a nanocrystalline cubic lattice structure.

11. The coated article of claim 1, wherein the layer comprising zirconium oxide comprises from about 30-80% (atomic %) oxygen.

12. A coated article including a coating supported by a glass substrate, the coating comprising:

a layer comprising silver and/or copper;

a layer comprising zirconium oxide on the glass substrate over at least the layer comprising silver and/or copper;

a photocatalytic layer comprising at least one metal oxide on the glass substrate over at least the layer comprising silver and/or copper, and the layer comprising zirconium oxide; and

wherein each of the layer comprising zirconium oxide and the photocatalytic layer comprising the metal oxide are porous so as to permit silver and/or copper from the layer comprising silver and/or copper to migrate and/or diffuse to the outwardmost surface of the coated article over time.

13. The coated article of claim 12, wherein the index of refraction of the layer comprising zirconium oxide substantially matches that of the photocatalytic layer.

14. The coated article of claim 12, wherein the layer comprising zirconium oxide has a refractive index of from 2.0 to 2.1, and wherein the refractive index of the photocatalytic layer does not differ from the refractive index of the layer comprising zirconium oxide by more than 0.1.

15. The coated article of claim 12, wherein the layer comprising zirconium oxide has tensile stress.

16. The coated article of claim 12, further comprising a metal oxide dielectric film on the glass substrate that is located between the glass substrate and the layer comprising silver and/or copper.

17. The coated article of claim 12, wherein the coated article is a window and has a visible transmission of at least about 50%.

18. The coated article of claim 12, wherein the photocatalytic layer comprises each of titanium oxide and silver.