Multilayer heat processable vacuum coatings with metallic properties

• US 6,274,244 B1
• Filed: 11/29/1991
• Issued: 08/14/2001
• Est. Priority Date: 11/29/1991
• Status: Expired due to Term

• Current Assignee: Vitro Flat Glass LLC (Compagnie De Saint-Gobain)
• Original Assignee: PPG Industries Ohio Incorporated (Nouryon BV)
• Inventors: Finley, James J., Arbab, Mehran, Waynar, Thomas J.
• Primary Examiner(s): TURNER, ARCHENE A
• Application Number:
  US07/799,806
• Time in Patent Office: 3,546 Days
• Field of Search: 428/426, 428/428, 428/432, 428/433, 428/469, 428/472, 428/698, 428/697, 428/699, 428/701
• US Class Current: 428/433
• CPC Class Codes: C03C 17/09 by deposition from the vapour phase
• CPC Class Codes: C03C 17/225 Nitrides
• CPC Class Codes: C03C 17/245 by deposition from the vapour phase
• CPC Class Codes: C03C 17/3435 comprising a nitride, oxynitride, boronitride or carbonitride
• CPC Class Codes: C03C 17/3441 comprising carbon, a carbide or oxycarbide
• CPC Class Codes: C03C 17/36 at least one coating being a metal
• CPC Class Codes: C03C 17/3605 Coatings of the type glass/metal/inorganic compound
• CPC Class Codes: C03C 17/3607 Coatings of the type glass/inorganic compound/metal
• 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 17/3626 one layer at least containing a nitride, oxynitride, boronitride or carbonitride
• CPC Class Codes: C03C 17/3642 the multilayer coating containing a metal layer
• 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 17/3689 one oxide layer being obtained by oxidation of a metallic layer
• CPC Class Codes: C03C 17/40 all coatings being metal coatings
• CPC Class Codes: C03C 2217/23 Mixtures
• CPC Class Codes: C03C 2217/27 Mixtures of metals, alloys
• CPC Class Codes: C03C 2217/281 Nitrides
• CPC Class Codes: C03C 2217/78 Coatings specially designed to be durable, e.g. scratch-resistant
• CPC Class Codes: C23C 14/0641 : Nitrides C23C14/0617 takes precedence
• CPC Class Codes: C23C 14/0676 : Oxynitrides
• CPC Class Codes: C23C 14/08 : Oxides C23C14/10 takes precedence
• CPC Class Codes: C23C 14/185 : by cathodic sputtering

Abstract

A temperable coated article with metallic properties is prepared by coating a glass substrate with a metal-containing film such as titanium nitride, which ordinarily oxidizes at high temperature, overcoating with a protective layer of a silicon compound which forms a durable layer and prevents oxidation of the underlying metal-containing film and undercoating with a stabilizing metal-containing layer. The coated article can be tempered without losing its metallic properties to oxidation.

Claims

1. A coated article comprising:

a transparent glass substrate;

a stabilizing layer on a surface of said glass substrate wherein the stabilizing layer contains a metal selected from the group consisting of silicon and titanium;

a titanium nitride layer over the stabilizing layer, and

a protective layer which prevents oxidation of the titanium nitride layer upon heating, the protective layer comprising silicon nitride or silicon oxynitride.

2. The coated article according to claim 1 wherein the stabilizing layer is silicon and the protective layer is silicon nitride.

3. The coated article according to claim 1 wherein the stabilizing layer is silicon and the protective layer is silicon oxynitride.

4. The coated article according to claim 1 wherein the stabilizing layer is titanium and the protective layer is silicon nitride.

5. The coated article according to claim 1 wherein the stabilizing layer is titanium and the protective layer is silicon oxynitride.

6. A coated article comprising:

a transparent glass substrate;

a stabilizing layer on a surface of said glass substrate wherein the stabilizing layer is a silicon-metal alloy or titanium;

a titanium nitride film over the stabilizing layer, and

a protective layer which prevents oxidation of the titanium nitride film upon heating, the protective layer selected from the group consisting of silicon-metal alloy nitride and silicon-metal alloy oxynitride.

7. The coated article according to claim 6 wherein the stabilizing layer is a silicon-metal alloy and the protective layer is a silicon-metal alloy nitride.

8. The coated article according to claim 6 wherein the stabilizing layer is a silicon-metal alloy and the protective layer is a silicon-metal alloy oxynitride.

9. The coated article according to claim 6 wherein the stabilizing layer is titanium and the protective layer is a silicon-metal alloy nitride.

10. The coated article according to claim 6 wherein the stabilizing layer is titanium and the protective layer is a silicon-metal alloy oxynitride.

11. A coated article comprising:

a substrate;

a functional layer over a surface of the substrate, the functional layer including a film defined as a first film to reduce solar heat load and a stabilizing film defined as a second film to prevent breakdown of the first film;

a protective film of a nitride or oxynitride of silicon or silicon alloys over the functional layer.

12. The coated article according to claim 11 wherein the first film of the functional layer is a metallic film.

13. The coated article according to claim 12 wherein the second film of the functional layer is between the substrate and the metallic film.

14. The coated article according to claim 12 wherein the functional layer further includes a dielectric film between the substrate and the metal film.

15. A coated article comprising:

a glass substrate;

a stabilizing layer over the surface of said glass substrate wherein the stabilizing layer is a silicon metal alloy, titanium or silicon;

a titanium nitride film over the stabilizing layer, and

a protective layer which prevents oxidation of the titanium nitride film upon heating, the protective layer selected from the group consisting of silicon nitride, silicon oxynitride, silicon-metal alloy nitride and silicon-metal alloy oxynitride.