# US 11,028,011 B2 · High infrared reflection coatings, thin film coating deposition methods and associated technologies

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- Number: US 11,028,011 B2
- Document ID: US11028011B2
- Status: Granted
- Kind: B2
- Application number: 16/596,043
- Filed: 2019-10-08
- Published: 2020-03-19
- Granted: 2021-06-08
- Earliest claimed: 2005-10-11
- Assignees: Cardinal CG Company
- Applicants: Cardinal CG Company
- Inventors: Klaus Hartig
- Web page: https://patentgrep.com/patent/US11028011B2

## CPC

- C03C 17/3613: {Coatings of type glass/inorganic compound/metal/inorganic compound/metal/other}
- C03C 17/36: at least one coating being a metal
- C03C 17/3626: {one layer at least containing a nitride, oxynitride, boronitride or carbonitride}
- C03C 17/3639: {Multilayers containing at least two functional metal layers}
- C03C 17/3642: {the multilayer coating containing a metal layer}
- C03C 17/3644: {the metal being silver}
- C03C 17/3652: {the coating stack containing at least one sacrificial layer to protect the metal from oxidation}
- C03C 17/366: {Low-emissivity or solar control coatings}
- C03C 17/3681: {the multilayer coating being used in glazing, e.g. windows or windscreens}
- C23C 14/086: {of zinc, germanium, cadmium, indium, tin, thallium or bismuth}
- C23C 14/185: {by cathodic sputtering}
- C23C 14/35: by application of a magnetic field, e.g. magnetron sputtering {(C23C14/3457 takes precedence)}
- C23C 14/568: {Transferring the substrates through a series of coating stations (C23C14/562 takes precedence)}
- E06B 3/6715: {specially adapted for increased thermal insulation or for controlled passage of light (E06B3/66323 takes precedence; coating of glass pains C03C17/00; devices or arrangements for controlling the intensity, colour, phase, polarisation or direction of light G02F1/00)}
- E06B 9/24: Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; {Slat blinds}(operating, guiding or securing devices or arrangements for roll-type closures E06B9/56; free-hanging flexible screens A47H23/00)
- G02B 5/208: {for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation}
- G02B 5/26: Reflecting filters (G02B5/28 takes precedence)
- C03C 2217/211: SnO2
- C03C 2217/216: ZnO
- C03C 2217/78: Coatings specially designed to be durable, e.g. scratch-resistant
- C03C 2218/153: by plasma-enhanced cvd
- C03C 2218/154: by sputtering
- C03C 2218/156: by magnetron sputtering
- E06B 2009/2417: {Light path control; means to control reflection}
- Y02B 80/22: Glazing, e.g. vaccum glazing
- Y10T 428/24612: Composite web or sheet
- Y10T 428/24942: including components having same physical characteristic in differing degree
- Y10T 428/2495: Thickness [relative or absolute]
- Y10T 428/24975: No layer or component greater than 5 mils thick
- Y10T 428/31504: Composite [nonstructural laminate]
- C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04)
- E06B: FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES (shades or blinds for greenhouses A01G9/22; curtains A47H; lids for car boots or bonnets B62D25/10; skylights E04B7/18; sunshades, awnings E04F10/00)
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The invention provides low-emissivity coatings that are highly reflective of infrared radiation. The coating includes three infrared-reflection film regions, which may each comprise silver.

## Claims

### Claim 1

A first pane having opposed first and second major surfaces, the first pane being part of a multiple-pane insulating glazing unit that includes a second pane, wherein the multiple-pane insulating glazing unit has at least one between-pane space, the multiple-pane insulating glazing unit being mounted such that the first major surface of the first pane is exposed to an outdoor environment, wherein the second major surface of the first pane has a coated interior surface that is exposed to a between-pane space of the multiple-pane insulating glazing unit, said coated interior surface bearing a low-emissivity coating that includes, from said interior surface outward:
a) a first transparent dielectric film region;
b) a first infrared-reflection film region;
c) a second transparent dielectric film region;
d) a second infrared-reflection film region;
e) a third transparent dielectric film region;
f) a third infrared-reflection film region; and
g) a fourth transparent dielectric film region;
the first, second, and third transparent dielectric film regions each being a single layer of a single transparent dielectric material;
the first, second, and third infrared-reflection film regions each consisting of silver combined with no more than about 5% of another metal selected from the group consisting of gold, platinum, and palladium;
the low-emissivity coating comprising one or more nitride or oxynitride films; and
the low-emissivity coating having a sheet resistance of less than 1.4 ohms/square.

### Claim 2 (depends on 1)

The first pane of claim 1 wherein the sheet resistance of the low-emissivity coating is about 1.25-1.3 ohms/square.

### Claim 3 (depends on 1)

The first pane of claim 1 wherein the one or more nitride or oxynitride films comprise silicon nitride and/or silicon oxynitride.

### Claim 4 (depends on 1)

The first pane of claim 1 wherein the low-emissivity coating has a total physical thickness of greater than 1,750 angstroms.

### Claim 5 (depends on 1)

The first pane of claim 1 wherein the low-emissivity coating has a total physical thickness of greater than 2,000 angstroms.

### Claim 6 (depends on 1)

The first pane of claim 1 wherein the low-emissivity coating further includes:
a first blocker film region over and contiguous to the first infrared-reflection film region;
a second blocker film region over and contiguous to the second infrared-reflection film region; and
a third blocker film region over and contiguous to the third infrared-reflection film region.

### Claim 7 (depends on 1)

The first pane of claim 1 wherein the first transparent dielectric film region comprises film having a refractive index of 1.7 or greater.