# US 2019/0315099 A1 · Layered bendable puncture resistant glass article and method of making

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- Number: US 2019/0315099 A1
- Document ID: US20190315099A1
- Status: Published application
- Kind: A1
- Application number: 16/346,304
- Filed: 2017-10-27
- Published: 2019-10-17
- Earliest claimed: 2016-10-31
- Assignees: Corning Incorporated
- Applicants: Corning Incorporated
- Inventors: Shinu Baby; Dana Craig Bookbinder; Polly Wanda Chu; Timothy Michael Gross; Yousef Kayed Qaroush
- Web page: https://patentgrep.com/patent/US20190315099A1

## CPC

- B32B 17/06: comprising glass as the main or only constituent of a layer, next to another layer of a specific {material}
- B32B 3/08: characterised by added members at particular parts {(layer formed of separate pieces of material which are juxtaposed side-by-side B32B3/14, B32B3/18)}
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- C03C 17/30: with silicon-containing compounds
- C03C 17/32: with synthetic or natural resins (C03C17/30 takes precedence)
- C03C 27/10: with the aid of adhesive specially adapted for that purpose
- B32B 2255/26: Polymeric coating
- B32B 2307/546: Flexural strength; Flexion stiffness
- B32B 2307/581: Resistant to cut
- B32B 2315/08: Glass
- B32B 2379/08: Polyimides
- B32B 2457/20: Displays, e.g. liquid crystal displays, plasma displays
- G02F 1/133305: {Flexible substrates, e.g. plastics, organic film}
- G06F 1/1652: {the display being flexible, e.g. mimicking a sheet of paper, or rollable}
- H04M 1/0268: {including a flexible display panel}
- 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
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08)

## Abstract

A glass article having a first glass layer, a second glass layer disposed adjacent to the first glass layer, and an interface slidably coupling the first glass layer to the second glass layer. The interface has a thickness of from 2 nm to 500 nm. The glass article is characterized by: (a) an absence of failure when the article is held at a parallel plate separation distance of 10 mm for 60 minutes at 25° C. and 50% relative humidity; (b) a puncture resistance of greater than about 6 kgf when the second glass layer is supported by (i) a 50 μm thick pressure-sensitive adhesive having an elastic modulus of less than 1 GPa and (ii) an approximately 100 μm thick polyethylene terephthalate layer having an elastic modulus of less than 10 GPa, and the first glass layer is loaded with a tungsten carbide ball having a 1 mm diameter.

## Claims

### Claim 1

A glass article, comprising:
a first glass layer;
a second glass layer disposed adjacent to the first glass layer;
an interface slidably coupling the first glass layer to the second glass layer, the interface comprising a thickness of from 2 nm to 500 nm;
the glass article characterized by: (a) an absence of failure when the article is held at a parallel plate separation distance of 10 mm for 60 minutes at 25° C. and 50% relative humidity; (b) a puncture resistance of greater than about 6 kgf when the second glass layer is supported by (i) an 50 μm thick pressure-sensitive adhesive having an elastic modulus of less than 1 GPa and (ii) an approximately 100 μm thick polyethylene terephthalate layer having an elastic modulus of less than 10 GPa, and the first glass layer is loaded with a tungsten carbide ball having a 1 mm diameter.

### Claim 2 (depends on 1)

The glass article of claim 1, further comprising an index of refraction matching material disposed in the interface.

### Claim 3 (depends on 1)

The glass article of claim 1, further comprising a coating on at least one of the first and second glass layers, the coating being disposed in the interface.

### Claim 4 (depends on 3)

The glass article of claim 3, wherein the coating on the at least one of the first and second glass layers comprises a polyimide material.

### Claim 5 (depends on 1)

The glass article of claim 1, wherein the second glass layer is from 10 microns to 125 microns thick.

### Claim 6 (depends on 1)

The glass article of claim 1, wherein the first glass layer is from 10 microns to 125 microns thick.

### Claim 7 (depends on 1)

The glass article of claim 1, wherein the first glass layer has a larger thickness than the second glass layer.

### Claim 8 (depends on 7)

The glass article of claim 7, wherein the first glass layer is from 100 microns to 125 microns thick.

### Claim 9 (depends on 1)

The glass article of claim 1, further comprising a hinge axis, and the first and second glass layers are fixed relative to one another at the hinge axis.

### Claim 10 (depends on 1)

The glass article of claim 1, further comprising a frame element disposed around the first and second glass layers.

### Claim 11

A glass article, comprising:
a first glass layer having a thickness of from 10 microns to 70 microns;
a second glass layer disposed adjacent to the first glass layer, the second glass layer having a thickness of from 10 microns to 70 microns;
a first interface slidably coupling the first glass layer to the second glass layer, the interface comprising a thickness of from 2 nm to 500 nm;
a third glass layer disposed adjacent to the second glass layer, the third glass layer having a thickness of from 10 microns to 70 microns;
a second interface slidably coupling the second glass layer to the third glass layer, the second interface comprising a thickness of from 2 nm to 500 nm;
the glass article characterized by: (a) an absence of failure when the article is held at a parallel plate separation distance of 2 mm for 60 minutes at 25° C. and 50% relative humidity; (b) a puncture resistance of greater than about 6 kgf when the third glass layer is supported by (i) an 50 μm thick pressure-sensitive adhesive having an elastic modulus of less than 1 GPa and (ii) an approximately 100 μm thick polyethylene terephthalate layer having an elastic modulus of less than 10 GPa, and the first glass layer is loaded with a tungsten carbide ball having a 1 mm diameter.

### Claim 12 (depends on 11)

The glass article of claim 11, further comprising an index of refraction matching material disposed in at least one of the first through fifth interfaces.

### Claim 13 (depends on 11)

The glass article of claim 11, further comprising a coating on at least one of the first and second glass layers, the coating being disposed in the interface.

### Claim 14 (depends on 13)

The glass article of claim 13, wherein the coating on the at least one of the first and second glass layers comprises a polyimide material.

### Claim 15 (depends on 11)

The glass article of claim 11, wherein the first glass layer has a larger thickness than any one of the second through sixth glass layers.

### Claim 16 (depends on 11)

The glass article of claim 11, further comprising a hinge axis, and the first and second glass layers are fixed relative to one another at the hinge axis.

### Claim 17 (depends on 11)

The glass article of claim 11, further comprising a frame element disposed around the first and second glass layers.