Method of making a heat treated coated glass

• US 5,543,229 A
• Filed: 10/28/1992
• Issued: 08/06/1996
• Est. Priority Date: 10/30/1991
• Status: Expired due to Term

• Current Assignee: Asahi Glass Company, Limited (AGC, Inc.)
• Original Assignee: Asahi Glass Company, Limited (AGC, Inc.)
• Inventors: Kojima, Hiroyasu, Suzuki, Koichi, Ohsaki, Hisashi
• Primary Examiner(s): TURNER, ARCHENE A
• Application Number:
  US07/967,438
• Time in Patent Office: 1,378 Days
• Field of Search: 428/698, 428/472, 428/432, 428/433, 428/697, 428/699, 428/701, 428/702, 428/216
• US Class Current: 428/432
• 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 17/3488 comprising a boride or phosphide
• CPC Class Codes: C03C 17/36 at least one coating being a 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 17/3626 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 17/3649 made of metals other than 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 17/3655 the multilayer coating containing at least one conducting layer
• CPC Class Codes: C03C 17/366 Low-emissivity or solar control coatings
• CPC Class Codes: Y10T 428/24975 No layer or component greater than 5 mils thick

Abstract

A method of making a heat treated coated glass comprising the steps of: forming a solar control layer or an electroconductive layer on a glass substrate; forming a first protective layer composed of a non-oxide or not completely oxidized, which is transparent in a region of visible light, and which remains transparent even when oxidized, to provide a glass coated with a multi-layer comprising at least two layers including said solar control layer or an electroconductive layer and said first protective layer; and performing heat-treatment for said coated glass.

Claims

1. A coated glass, comprising:

a) a glass substrate which has been subjected to heat treatment; and

b) a multi-layer coating applied to said glass substrate prior to said heat treatment, said coating comprising;

b)1) a solar control or electroconductive layer formed onto the surface of said glass substrate, wherein said solar control layer comprises a metal selected from the group consisting of stainless steel, titanium, chromium, zirconium, tantalum, hafnium, silver and aluminum; and

b)2) a first protective coating layer formed on said solar control or electroconductive coating layer, said protective coating layer comprising one or more of;

b)2)i) a nitride selected from the group consisting of a silicon nitride, a siliconitride, a boron nitride, and a boronitride;

b)2)ii) a composite nitride of silicon or boron or both and at least one selected from the group consisting of carbon, aluminum, zirconium and tin; and

b)2)iii) a partially oxidized coating of b)2)i) or b)2)ii) or both, and

wherein said protective coating is transparent in a region of visible light.

2. The coated glass of claim 1, further comprising:

b)

     3) a second protective coating layer formed onto said first protective coating layer, which is transparent in a region of visible light and is a metal oxide.

3. The coated glass of claim 2, wherein said metal oxide of said second protective coating layer is a metal oxide selected from the group consisting of the oxides of tin, zinc, zirconium, tantalum, niobium, titanium and silicon.

4. The coated glass of claim 1, wherein said first protective coating layer comprises a silicon nitride, a boron nitride, a zirconium siliconitride or a tin siliconitride.

5. The coated glass of claim 2, wherein said first protective coating layer comprises silicon nitride, a boron nitride, a zirconium siliconitride or a tin siliconitride.

6. The coated glass of claim 3, wherein said first protective coating layer comprises silicon nitride, a boron nitride, a zirconium siliconitride or a tin siliconitride.

7. A coated glass, comprising:

a) a glass substrate which has been subjected to heat treatment;

b) a multi-layer coating applied to said glass substrate prior to said heat treatment, said coating comprising;

b)1) a solar control or electroconductive layer formed onto the surface of said glass substrate, wherein said solar control layer comprises one or more of;

b)1)i) a nitride selected from the group consisting of a silicon nitride, a siliconitride, a boron nitride and a boronitride;

b)1)ii) a metal nitride selected from the group consisting of the nitrides of stainless steel, titanium, chromium, zirconium, tantalum and hafnium; and

b)1)iii) a metal boride selected from the group consisting of the borides of stainless steel, titanium, chromium, zirconium, tantalum and hafnium; and

b)1)iv) a metal carbide selected from the group consisting of the carbides of stainless steel, titanium, chromium, zirconium, tantalum and hafnium;

wherein said electroconductive layer comprises;

b)1)v) an electroconductive metal oxide or metal- or fluorine-doped metal oxide, said metal oxide being selected from the group consisting of indium oxide, tin oxide, zinc oxide, titanium dioxide, tin dioxide, thorium dioxide, vanadium pentoxide, niobium pentoxide, tantalum pentoxide, molybdenum trioxide, tungsten trioxide, manganese dioxide and lead chromate;

b)2) a first protective coating layer formed on said solar control or electroconductive layer, comprising one or more of;

b)2)i) a nitride selected from the group consisting of a boron nitride, a boronitride, a silicon nitride, a carbonitride and a siliconitride;

b)2)ii) a composite nitride of silicon or boron or both and at least one selected from the group consisting of carbon, aluminum, zirconium and tin;

b)2)iii) a partially oxidized coating of b)2)i) or b)2)ii) or both,

wherein said protective coating is transparent in a region of visible light,

said coated glass further comprising;

b)3) a second protective coating layer formed on said first protective coating layer, which is transparent in a region of visible light and is a metal oxide selected from the group consisting of the oxides of tin, zinc, zirconium, tantalum, niobium, titanium and silicon.

8. The coated glass of claim 7, wherein said protective coating layer comprises silicon nitride, a boron nitride, a zirconium siliconitride or a tin siliconitride.