Coated article with high visible transmission and low emissivity

• US 20110284366A1
• Filed: 07/28/2011
• Published: 11/24/2011
• Est. Priority Date: 10/17/2001
• Status: Active Grant

• Current Assignee: Guardian Glass LLC (KOCH Industries Incorporated)
• Original Assignee: C.R.V.C., Guardian Industries Corporation (KOCH Industries Incorporated)
• Inventors: Laird, Carole, Kriltz, Uwe, Laird, Ronald E.
• Granted Patent: US 8,491,760 B2
• Time in Patent Office: Days
• US Class Current: 204/192.23
• CPC Class Codes: C03C 17/36 at least one coating being a metal
• 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 17/3626 one layer at least containing a nitride, oxynitride, boronitride or carbonitride
• CPC Class Codes: C03C 17/3636 one layer at least containing silicon, hydrogenated silicon or a silicide
• 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 17/366 Low-emissivity or solar control coatings
• CPC Class Codes: C03C 2217/78 Coatings specially designed to be durable, e.g. scratch-resistant
• CPC Class Codes: Y10T 428/12896 Ag-base component

Abstract

A coated article that can be used in applications such as insulating glass (IG) units, so that resulting IG units can achieve high visible transmission of at least 70% (e.g., when using clear glass substrates from 1.0 to 3.5 mm thick), combined with at least one of: (a) SHGC no greater than about 0.45, more preferably no greater than about 0.40; (b) SC no greater than about 0.49, more preferably no greater than about 0.46; (c) chemical and/or mechanical durability; (d) neutral transmissive color such that transmissive a* is from −5.0 to 0 (more preferably from −3.5 to −1.5), and transmissive b* is from −2.0 to 4.0 (more preferably from 1.0 to 3.0); and (e) neutral reflective color from the exterior of the IG unit (i.e., Rg/R_out) such that reflective a* is from −3.0 to 2.0 (more preferably from −2.0 to 0.5), and reflective b* is from −5.0 to 1.0 (more preferably from −4.0 to −1.0). In certain example non-limiting embodiments, coated articles herein comprise: substrate/TiO_x/ZnO_x/Ag/NiCrO_x/SnO_x/ZnO_x/Ag/NiCrO_x/SnO_x/Si_xN_y.

Claims

1-40. -40. (canceled)

41. A method of making a coated article including a coating supported by a glass substrate, the method comprising:

providing a glass substrate;

sputtering a coating on the glass substrate, the coating comprising at least the following layers on the glass substrate;

a layer comprising zinc oxide;

a layer comprising silver over and contacting the layer comprising zinc oxide; and

a layer comprising nickel chromium oxide over and contacting the layer comprising silver, wherein the layer comprising nickel chromium oxide is sputter-deposited in an atmosphere comprising oxygen gas so as to be oxidized throughout its thickness as deposited;

a dielectric layer provided over at least the layer comprising nickel chromium oxide;

another layer comprising zinc oxide;

another layer comprising silver located over and contacting the another layer comprising zinc oxide;

wherein there are no more than two layers comprising silver in the coating; and

wherein the coating has a sheet resistance (R_s) of no greater than 5.0 ohms/square.

42. The method of claim 41, wherein the coated article has an SHGC of no greater than 0.45.

43. The method of claim 41, wherein the coated article has an a* glass side reflectance (a*_g) of from 0 to 2.5.

44. The method of claim 41, wherein the coated article has a b* glass side reflectance (b*_g) of from −

5.0 to 0.

45. The method of claim 41, wherein an uppermost layer of the coating comprises carbon or silicon nitride.

46. A method of making a coated article including a coating supported by a glass substrate, the method comprising:

providing a glass substrate;

sputtering a coating on the glass substrate, the coating comprising at least the following layers on the glass substrate;

a layer comprising zinc oxide;

a layer comprising silver over and contacting the layer comprising zinc oxide; and

a layer comprising nickel chromium oxide over and contacting the layer comprising silver, wherein the layer comprising nickel chromium oxide is sputter-deposited in an atmosphere comprising oxygen gas so as to be oxidized throughout its thickness as deposited;

a dielectric layer provided over at least the layer comprising nickel chromium oxide;

another layer comprising zinc oxide;

another layer comprising silver located over and contacting the another layer comprising zinc oxide;

wherein there are no more than two layers comprising silver in the coating.