# US 12,179,460 B2 · Glazing unit having a metal-based coating and a protective layer at the margin

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,179,460 B2
- Document ID: US12179460B2
- Status: Granted
- Kind: B2
- Application number: 18/549,859
- Filed: 2022-05-16
- Published: 2024-05-09
- Granted: 2024-12-31
- Earliest claimed: 2021-05-26
- Assignees: Saint-Gobain Glass France
- Applicants: Saint-Gobain Glass France
- Inventors: Anna Neft; Stephan Gillessen; Stefanie Pengel; Jefferson Do Rosario
- Web page: https://patentgrep.com/patent/US12179460B2

## CPC

- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 17/10229: {Metallic layers sandwiched by dielectric layers}
- B32B 1/00: Layered products having a non-planar shape
- B32B 3/02: characterised by features of form at particular places, e.g. in edge regions {(non-uniform thickness B32B3/263)}
- B32B 17/10036: {comprising two outer glass sheets}
- B32B 17/10201: {Dielectric coatings}
- B32B 17/10211: {Doped dielectric layer, electrically conductive, e.g. SnO2:F}
- B32B 17/1022: {Metallic coatings}
- B32B 17/10266: {on glass pane}
- B32B 17/10302: {Edge sealing}
- B32B 17/10348: {comprising an obscuration band}
- B32B 17/10761: {containing vinyl acetal}
- B32B 17/1077: {containing polyurethane}
- B32B 17/10788: {containing ethylene vinylacetate}
- B32B 17/10807: {Making laminated safety glass or glazing; Apparatus therefor}
- B32B 17/10935: {as a preformed layer, e.g. formed by extrusion}
- B32B 27/30: comprising vinyl {(co)polymers; comprising acrylic (co)polymers}
- B32B 27/306: {comprising vinyl acetate or vinyl alcohol (co)polymers}
- B32B 27/40: comprising polyurethanes
- C03C 17/36: at least one coating being a metal
- C03C 17/3639: {Multilayers containing at least two functional metal layers}
- C03C 17/3642: {the multilayer coating containing a metal layer}
- C03C 17/366: {Low-emissivity or solar control coatings}
- C03C 17/3681: {the multilayer coating being used in glazing, e.g. windows or windscreens}
- C03C 27/10: with the aid of adhesive specially adapted for that purpose
- B32B 2255/20: Inorganic coating
- B32B 2255/205: Metallic coating
- B32B 2255/28: Multiple coating on one surface
- B32B 2307/202: Conductive
- B32B 2307/204: Di-electric
- B32B 2307/4023: on the layer surface, e.g. ink
- B32B 2307/41: Opaque
- B32B 2307/412: Transparent
- B32B 2307/416: Reflective
- B32B 2307/714: Inert, i.e. inert to chemical degradation, corrosion
- B32B 2605/00: Vehicles
- B32B 2605/08: Cars
- B60J 1/08: arranged at vehicle sides
- C03C 2217/94: Transparent conductive oxide layers [TCO] being part of a multilayer coating
- C03C 2217/948: Layers comprising indium tin oxide [ITO]
- C03C 2218/153: by plasma-enhanced cvd
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- 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
- B60J: WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES (fastening, suspending, closing, or opening of such devices E05)

## Abstract

A glazing unit includes a first pane and a second pane, which are connected to one another via a thermoplastic intermediate layer, a metal-based functional layer, which is deposited on an internal surface of the first pane facing the thermoplastic intermediate layer, a coating-free marginal region on the internal surface of the first pane, which is free of metal-based functional layer and extends from one side edge of the first pane over at least 1 mm to at most 5 mm on the internal surface, a protective layer, which, in the coating-free marginal region, is disposed directly on the internal surface of the first pane and, in an overlap region directly adjacent to the coating-free marginal region, is disposed on the metal-based functional layer.

## Claims

### Claim 1

A glazing unit comprising:
a first pane and a second pane, which are connected to one another via a thermoplastic intermediate layer,
a metal-based functional layer, which is deposited on an internal surface of the first pane facing the thermoplastic intermediate layer,
a coating-free marginal region on the internal surface of the first pane, which is free of metal-based functional layer and extends from one side edge of the first pane over at least 1 mm to at most 5 mm on the internal surface, and
a protective layer, which, in the coating-free marginal region, is disposed on the internal surface of the first pane and, in an overlap region directly adjoining the coating-free marginal region, is disposed on the metal-based functional layer,
wherein the protective layer is a transparent oxide-containing coating.

### Claim 2 (depends on 1)

The glazing unit according to claim 1, wherein the protective layer extends from the side edge of the first pane over 3 mm to 15 mm.

### Claim 3 (depends on 1)

The glazing unit according to claim 1, wherein the glazing unit comprises a circumferential pane edge and the coating-free marginal region as well as the protective layer are disposed in sections along the circumferential pane edge or the coating-free marginal region as well as the protective layer extend circumferentially along the entire circumferential pane edge.

### Claim 4 (depends on 1)

The glazing unit according to claim 1, wherein the transparent oxide-containing coating is a SiOxCyHz layer.

### Claim 5 (depends on 4)

The glazing unit according to claim 4, wherein the enamel contains glass frits and/or mineral frits and optionally at least one pigment.

### Claim 6 (depends on 1)

The glazing unit according to claim 1, wherein the protective layer is a SolGel layer, a PVD layer or a CVD layer.

### Claim 7 (depends on 6)

The glazing unit according to claim 6, wherein the protective layer is an oxide-containing coating, which contains an oxide of at least one element selected from aluminum, silicon, titanium, zinc, zirconium, or tin.

### Claim 8 (depends on 1)

The glazing unit according to claim 1, wherein the protective layer is in direct contact with the thermoplastic intermediate layer.

### Claim 9 (depends on 1)

The glazing unit according to claim 1, wherein the metal-based functional layer comprises at least one metallic layer and is formed to reflect incident infrared light.

### Claim 10 (depends on 1)

The glazing unit according to claim 1, wherein the glazing unit is a motor vehicle pane and the first pane is the outer pane and the second pane is the inner pane of the vehicle pane.

### Claim 11 (depends on 1)

A method for manufacturing a glazing unit according to claim 1, comprising:
providing a first pane, a second pane and a thermoplastic intermediate layer,
applying a metal-based functional layer to the surface of the first pane provided as an internal surface,
removing the metal-based functional layer in a marginal region extending from one side edge of the first pane over at least 1 mm to at most 5 mm,
applying a protective layer in an overlap region directly adjoining the coating-free marginal region on the metal-based functional layer and in the coating-free marginal region on the surface of the first pane provided as an internal surface,
treating the first pane at temperatures of 400° C.-700° C., and
connecting the first pane and the second pane via the thermoplastic intermediate layer, such that the internal surface of the first pane faces the thermoplastic intermediate layer.

### Claim 12 (depends on 11)

The method according to claim 11, wherein the protective layer is an oxide-containing coating, which is applied by SolGel coating, PVD coating, CVD coating, plasma-enhanced PVD coating or plasma-enhanced CVD coating.

### Claim 13 (depends on 11)

The method according to claim 11, wherein the protective layer is an oxide-containing coating, which is applied by atmospheric plasma deposition.

### Claim 14 (depends on 11)

The method according to claim 11, wherein the removal of the metal-based functional layer in the coating-free marginal region is carried out by mechanical decoating, laser decoating or removal of a masking layer applied during the application of the metal-based functional layer.

### Claim 15 (depends on 1)

A method comprising providing a glazing unit according to claim 1 in a vehicle of transport for traffic on land, in the air or on water.

### Claim 16 (depends on 2)

The glazing unit according to claim 2, wherein the protective layer extends from the side edge of the first pane over 5 mm to 10 mm.

### Claim 17 (depends on 4)

The glazing unit according to claim 4, wherein the SiOxCyHz layer is formed by plasma polymerization of hexamethyldisiloxane.

### Claim 18 (depends on 5)

The glazing unit according to claim 5, wherein the enamel contains glass frits and/or mineral frits based on oxides selected from boron, bismuth, zinc, silicon, aluminum and sodium.

### Claim 19 (depends on 7)

The glazing unit according to claim 7, wherein the protective layer is an oxide of silicon or silicon oxide.

### Claim 20 (depends on 9)

The glazing unit according to claim 9, wherein the at least one metallic layer is at least one silver layer.