# US 2011/0236715 A1 · Solar control coatings with discontinuous metal layer

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- Number: US 2011/0236715 A1
- Document ID: US20110236715A1
- Status: Published application
- Kind: A1
- Application number: 13/072,866
- Filed: 2011-03-28
- Published: 2011-09-29
- Earliest claimed: 2010-03-29
- Assignees: PPG Industries Ohio, Inc.
- Inventors: Adam D. Polcyn; Andrew V. Wagner; Harry Buhay; Abhinav Bhandari; James J. Finley; Paul R. Ohodnicki, JR.; Dennis J. O'Shaughnessy; Jeffrey A. Benigni; Paul A. Medwick; James P. Thiel
- Web page: https://patentgrep.com/patent/US20110236715A1

## CPC

- C03C 17/36: at least one coating being a metal
- C03C 17/3618: {Coatings of type glass/inorganic compound/other inorganic layers, at least one layer being metallic}
- C03C 17/3639: {Multilayers containing at least two functional metal layers}
- C03C 17/366: {Low-emissivity or solar control coatings}
- C03C 2217/42: consisting of particles only
- Y10T 428/12542: More than one such component
- Y10T 428/12549: Adjacent to each other
- Y10T 428/24851: Intermediate layer is discontinuous or differential
- Y10T 428/24917: including metal layer
- 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
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

An architectural transparency includes a substrate, a first dielectric layer formed over at least a portion of the substrate, a continuous metallic layer formed over at least a portion of the first dielectric layer, a second dielectric layer formed over at least a portion of the first metallic layer, and a subcritical metallic layer formed over at least a portion of the second dielectric layer such that the subcritical metallic layer forms discontinuous metallic regions.

## Claims

### Claim 1

A coated article, comprising:
a substrate;
a coating stack over at least a portion of the substrate, the coating stack comprising a plurality of metallic layers and a plurality of dielectric layers, wherein at least one of the metallic layers comprises a subcritical metallic layer having discontinuous metallic regions.

### Claim 2 (depends on 1)

The article of claim 1, wherein at least one of the metallic layers comprises a continuous metallic layer.

### Claim 3 (depends on 1)

The article of claim 1, wherein the coating stack comprises:
a first dielectric layer formed over at least a portion of the substrate;
a continuous first metallic layer formed over at least a portion of the first dielectric layer;
a second dielectric layer formed over at least a portion of the first metallic layer;
a subcritical second metallic layer formed over at least a portion of the second dielectric layer such that the subcritical metallic layer forms discontinuous metallic regions; and
a third dielectric layer over at least a portion of the substantial metallic layer.

### Claim 4 (depends on 1)

The article of claim 1, wherein the subcritical metal is selected from silver, gold, copper, palladium, or mixtures thereof.

### Claim 5 (depends on 2)

The article of claim 2, wherein the continuous metallic layer comprises the same metal as the discontinuous metallic layer.

### Claim 6 (depends on 3)

The article of claim 3, including a primer layer formed over at least a portion of the subcritical metal layer, the primer selected from titanium, alloys containing nickel and chromium, silicon, silicon dioxide, silicon nitride, silicon oxynitride, NiCr, zirconium, aluminum, alloys of silicon and aluminum, and alloys containing cobalt and chromium.

### Claim 7 (depends on 3)

The article of claim 3, including a continuous third metal layer formed over at least a portion of the third dielectric layer, and a fourth dielectric layer formed over at least a portion of the third metal layer.

### Claim 8 (depends on 3)

The article of claim 3, wherein the first metallic layer comprises metallic silver and the subcritical metallic layer comprises discontinuous silver regions.

### Claim 9

A coated article, comprising:
a glass substrate; and
a coating over at least a portion of the substrate, the coating comprising:
a first dielectric layer formed over at least a portion of the glass substrate;
a continuous metallic layer formed over at least a portion of the first dielectric layer;
a second dielectric layer formed over at least a portion of the first metallic layer;
a subcritical metallic layer formed over at least a portion of the second dielectric layer such that the subcritical metallic layer forms discontinuous metallic regions;
a third dielectric layer formed over at least a portion of the subcritical metallic layer;
a third continuous metal layer formed over at least portion of the third dielectric layer;
a third dielectric layer formed over at least a portion of the third metal layer; and
a protective layer formed over at least a portion of the third metallic layer.

### Claim 10 (depends on 9)

The article of claim 9, wherein the subcritical metallic layer is selected from silver, gold, copper, palladium, and mixtures thereof.

### Claim 11 (depends on 9)

The article of claim 9, wherein the continuous metal layer is selected from gold, copper, silver, aluminum, and mixtures thereof.

### Claim 12 (depends on 9)

The article of claim 9, including a primer layer formed over at least a portion of the subcritical metal layer, the primer material selected from silicon, silicon dioxide, silicon nitride, silicon oxynitride, NiCr, zirconium, aluminum, alloys of silicon and aluminum, alloys of nickel and chromium, and alloys containing cobalt and chromium.

### Claim 13

A coated article, comprising:
a substrate; and
a coating over at least a portion of the substrate, the coating comprising:
a first dielectric layer formed over at least a portion of the substrate;
a first metallic layer formed over at least a portion of the first dielectric layer;
a second dielectric layer formed over at least a portion of the first metallic layer;
a second metallic layer formed over at least a portion of the second dielectric layer; and
a third dielectric layer formed over at least a portion of the second metallic layer,
wherein at least one of the metallic layers is a subcritical metallic layer having discontinuous metallic regions.

### Claim 14 (depends on 13)

The article of claim 13, wherein at least one of the metallic layers is a continuous metallic layer.

### Claim 15 (depends on 13)

The article of claim 13, further including a third metallic layer over the third dielectric layer and a fourth dielectric layer over at least a portion of the third metallic layer.

### Claim 16

A coated article, comprising:
a substrate;
a coating stack over at least a portion of the substrate, the coating stack comprising:
a first dielectric layer;
at least one discontinuous metallic layer over the first dielectric layer; and
a second dielectric layer over the discontinuous metallic layer.

### Claim 17

A coated article, comprising:
a substrate; and
a coating over at least a portion of the substrate, the coating comprising:
a first dielectric layer formed over at least a portion of the substrate and comprising a zinc oxide layer over a zinc stannate layer;
a first, continuous metallic silver layer comprising silver over the first dielectric layer;
a first primer layer over the first continuous metallic silver layer, the first primer comprising titanium;
a second dielectric layer over the first primer layer comprising a zinc stannate layer over a zinc oxide layer;
a second, discontinuous metallic silver layer over the second dielectric layer;
a second primer over the second discontinuous metallic silver layer and comprising a nickel-chromium alloy;
a third dielectric layer over the second primer layer and comprising a zinc oxide layer, a zinc stannate layer, and another zinc oxide layer;
a third continuous metallic silver layer over the third dielectric layer;
a third primer layer comprising titanium over the third continuous metallic silver layer;
a fourth dielectric layer comprising a zinc stannate layer over a zinc oxide layer over the third primer layer; and
a protective coating comprising titania over the fourth dielectric coating.