Layered bendable puncture resistant glass article and method of making

Patent metadata

Field	Value
Publication number	US-11279114-B2
Application number	US-201716346304-A
Country	US
Kind code	B2
Filing date	Oct 27, 2017
Priority date	Oct 31, 2016
Publication date	Mar 22, 2022
Grant date	Mar 22, 2022

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.

First claim

What is claimed is:

1. A glass article, comprising:
a first glass layer, wherein the first glass layer is from 100 microns to 125 microns thick;
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 comprising a thickness of from 2 nm to 500 nm,
wherein 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; and
(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.

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

3. 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.

4. 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.

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

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

7. 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.

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

9. The glass article of claim 1 , wherein the glass layers are chemically strengthened.

Assignees

• Corning Inc

Inventors

• Baby Shinu
• Bookbinder Dana Craig
• Chu Polly Wanda
• Gross Timothy Michael
• Qaroush Yousef Kayed

Classifications

• H04M1/0268

  including a flexible display panel · CPC title

• C03C17/30

  with silicon-containing compounds · CPC title

• G06F1/1652

  the display being flexible, e.g. mimicking a sheet of paper, or rollable · CPC title

• B32B3/08

  characterised by added members at particular parts {(layer formed of separate pieces of material which are juxtaposed side-by-side B32B3/14, B32B3/18)} · CPC title

• G02F1/133305

  Flexible substrates, e.g. plastics, organic film · CPC title