US 9,321,679 B2 · Bendable glass stack assemblies, articles and methods of making the same

Abstract

A glass element having a thickness from 25 μm to 125 μm, a first primary surface, a second primary surface, and a compressive stress region extending from the first primary surface to a first depth, the region defined by a compressive stress σI of at least about 100 MPa at the first primary surface. Further, the glass element has a stress profile such that it does not fail when it is held at a bend radius from about 1 mm to about 20 mm for at least 60 minutes at about 25° C. and about 50% relative humidity. Still further, the glass element has a puncture resistance of greater than about 1.5 kgf when the first primary surface of the glass element is loaded with a tungsten carbide ball having a diameter of 1.5 mm.

Claims29

Dependent claims

A glass article, comprising:

a glass element having a thickness from about 50 μm to about 125 μm, the glass element further comprising:
(a) a first primary surface;
(b) a second primary surface;
and
(c) a compressive stress region extending from the first primary surface of the glass element to a first depth in the glass element, the region defined by a compressive stress of at least about 700 MPa at the first primary surface of the glass element,
wherein the glass element is characterized by:
(a) an absence of failure when the glass element is held at a bend radius from about 3 mm to about 10 mm for at least 60 minutes at about 25° C. and about 50% relative humidity;
(b) a puncture resistance of greater than about 1.5 kgf when the first primary surface of the glass element is loaded with a tungsten carbide ball having a diameter of 0.5 mm.

5 more elements

A method of making a stack assembly, comprising the steps:

forming a glass element having a first primary surface, a compressive stress region extending from the first primary surface of the glass element to a first depth in the glass element, and a thickness of from about 50 μm to about 125 μm, wherein the region is defined by a compressive stress of at least about 700 MPa at the first primary surface of the glass element,
wherein the glass element is characterized by:
(a) an absence of failure when the glass element is held at a bend radius from about 3 mm to about 10 mm for at least 60 minutes at about 25° C. and about 50% relative humidity;
(b) a puncture resistance of greater than about 1.5 kgf when the first primary surface of the glass element is loaded with a tungsten carbide ball having a diameter of 0.5 mm.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

14/602,300Filed 22 Jan 2015 · us provisional application

Priority

29 Jan 2014

Published

US 2015/0210590 A130 Jul 2015

Granted

26 Apr 2016

Term ends

Not estimatedThe source records don’t support an estimate.

Classification47 codes

B32B 17/10
Comprising glass as the main or only constituent of a layer, next to another layer of a specific material: of synthetic resin
B32B 3/14
Characterised by a discontinuous layer, i.e. formed of separate pieces of material: characterised by a face layer formed of separate pieces of…
B32B 3/263
Characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or…
B32B 7/12
Interconnection of layers: using interposed adhesives or interposed materials with bonding properties

Family

Application61/932,924Us provisional application · filed 29 Jan 2014

Application61/974,732Us provisional application · filed 3 Apr 2014

Application62/090,604Us provisional application · filed 11 Dec 2014

US 2015/0210590 A1Pre-grant publication · published 30 Jul 2015

US 9,321,679 B2This patent

From the US filing history. Foreign family members aren’t listed.

Bendable glass stack assemblies, articles and methods of making the same

Life of this patent

Bendable glass stack assemblies, articles and methods of making the same

Life of this patent

Abstract

Claims29