High durable, low-e, heat treatable layer coating system

• US 20020192474A1
• Filed: 05/20/2002
• Published: 12/19/2002
• Est. Priority Date: 07/10/2000
• Status: Active Grant

• Current Assignee: Guardian Glass LLC (KOCH Industries Incorporated)
• Original Assignee: Guardian Industries Corporation (KOCH Industries Incorporated)
• Inventors: Lingle, Philip J.
• Granted Patent: US 7,300,701 B2
• Time in Patent Office: Days
• US Class Current: 428/432
• CPC Class Codes: B32B 17/10009 characterized by the number, the constitution or treatment of glass sheets
• CPC Class Codes: B32B 17/10174 Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
• 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 17/3639 Multilayers containing at least two functional metal layers
• CPC Class Codes: C03C 17/3644 the metal being silver
• CPC Class Codes: C03C 17/3652 the coating stack containing at least one sacrificial layer to protect the metal from oxidation
• CPC Class Codes: C03C 17/366 Low-emissivity or solar control coatings
• CPC Class Codes: C03C 17/3681 the multilayer coating being used in glazing, e.g. windows or windscreens
• CPC Class Codes: C03C 17/3694 one layer having a composition gradient through its thickness
• CPC Class Codes: C03C 2217/78 Coatings specially designed to be durable, e.g. scratch-resistant
• CPC Class Codes: C23C 14/0015 characterized by the colour of the layer
• CPC Class Codes: C23C 14/0084 Producing gradient compositions
• CPC Class Codes: C23C 14/0652 Silicon nitride
• CPC Class Codes: Y10T 428/12549 Adjacent to each other

Abstract

A durable, heat treatable layer coating system of at least 10 layers including from the substrate outwardly: SnO_x wherein x is ≦2.0, TiO_X wherein x is <2.0 (or NiO_x wherein x is less than 1.0, silver, NiO_x wherein x is less than 1.0, SnO_x wherein x is ≦2.0, TiO_x wherein x is <2.0 or NiO_x wherein x is less than 1.0, silver, Nio_x wherein x is less than 1.0, SnO_x wherein x is ≦2.0, and Si₃N₄ as an overcoat.

Claims

1. A glass article having a sputter coated layer system thereon which from the glass substrate outwardly includes:

a) a layer comprised of SnO_x wherein x is ≧

2.0;

b) a layer comprised of TiO_x wherein x is <

2.0 or NiO_x wherein x is less than 1.0;

c) a layer comprised of silver;

d) a layer comprised of NiO_x wherein x is less than 1.0;

e) a layer comprised of SnO_x wherein x is ≦

2.0;

f) a layer comprised of TiO_x wherein x is <

2.0 or NiO_x wherein x is less than 1.0;

g) a layer comprised of silver;

h) a layer comprised of NiO_x wherein x is less than 1.0;

i) a layer comprised of SnO_x wherein x is ≦

2.0; and

j) a layer comprised of Si₃N₄.

2. A glass article according to claim 1 wherein said glass article is heat treatable.

3. A glass article according to claim 1 wherein said layers are of a thickness such that said layer system is mechanically durable.

4. A glass article according to claim 1 wherein layers (d) and (h) further includes chromium oxide and metallic nickel.

5. A glass article according to claim 1 wherein said glass article is heat treatable and said layer system is mechanically durable.

6. A glass article according to claim 1 wherein said layers (b) and (f) are comprised of NiO_x wherein x is less than 1.0.

7. A glass article according to claim 6 wherein said glass article is durable.

8. A glass article according to claim 6 wherein said glass article is heat treatable.

9. A glass article according to claim 8 wherein said glass article is durable.

10. A glass article according to claim 6 wherein said layers (b) and (f) consist essentially of NiO_x wherein x is less than 1.0.