# US 11,078,104 B2 · Thermal history-insensitive, alkali-containing glasses

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- Number: US 11,078,104 B2
- Document ID: US11078104B2
- Status: Granted
- Kind: B2
- Application number: 16/185,601
- Filed: 2018-11-09
- Published: 2019-05-23
- Granted: 2021-08-03
- Earliest claimed: 2017-11-17
- Assignees: Corning Incorporated
- Applicants: Corning Incorporated
- Inventors: Timothy Michael Gross; Alexandra Lai Ching Kao Andrews Mitchell
- Web page: https://patentgrep.com/patent/US11078104B2

## CPC

- C03C 3/083: containing aluminium oxide or an iron compound
- B32B 17/06: comprising glass as the main or only constituent of a layer, next to another layer of a specific {material}
- C03C 3/091: containing aluminium
- C03C 10/0018: {containing SiO2, Al2O3 and monovalent metal oxide as main constituents}
- C03C 10/0027: {containing SiO2, Al2O3, Li2O as main constituents}
- C03C 21/002: {to perform ion-exchange between alkali ions (C03C21/005 takes precedence)}
- G06F 1/1626: {with a single-body enclosure integrating a flat display, e.g. Personal Digital Assistants [PDAs]}
- G06F 1/1656: {Details related to functional adaptations of the enclosure, e.g. to provide protection against EMI, shock, water, or to host detachable peripherals like a mouse or removable expansions units like PCMCIA cards, or to provide access to internal components for maintenance or to removable storage supports like CDs or DVDs, or to mechanically mount accessories (mounting of accessories to a computer display G06F1/1607; display hoods G06F1/1603; cooling arrangements for portable computers G06F1/203)}
- B32B 2457/20: Displays, e.g. liquid crystal displays, plasma displays
- G06F 2200/1634: Integrated protective display lid, e.g. for touch-sensitive display in handheld computer
- 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
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)

## Abstract

A glass composition includes greater than or equal to 69.0 mol % SiO2, greater than or equal to 7.0 mol % Al2O3, greater than or equal to 14.0 mol % R2O, and an absolute value of a slope of a line extending between a first endpoint and a second endpoint less than or equal to |0.020|. The first endpoint is a Young's modulus at a fictive temperature of the annealing point temperature and the second endpoint is a Young's modulus at a fictive temperature of the strain point temperature, and the slope is a change in Young's modulus (GPa) per 1° C. change in fictive temperature. R2O is a total amount of alkali metal oxides and includes at least two alkali metal oxides. A glass article and consumer electronic product are also disclosed.

## Claims

### Claim 1

A glass composition comprising:
greater than or equal to 69.0 mol % SiO2;
greater than or equal to 7.0 mol % Al2O3;
greater than or equal to 14.0 mol % R2O; and
wherein the glass composition has an absolute value of a slope of a line extending between a first endpoint and a second endpoint less than or equal to |0.020|, wherein
the first endpoint is a Young's modulus at a fictive temperature of an annealing point temperature and the second endpoint is a Young's modulus at a fictive temperature of a strain point temperature,
the slope is a change in Young's modulus (GPa) per 1° C. change in fictive temperature, and
R2O is a total amount of alkali metal oxides and comprises at least two alkali metal oxides.

### Claim 2 (depends on 1)

The glass composition of claim 1, wherein R2O is greater than or equal to 18.0 mol %.

### Claim 3 (depends on 1)

The glass composition of claim 1, wherein R2O comprises K2O in an amount from greater than or equal to 7.0 mol % to less than or equal to 11.0 mol %.

### Claim 4 (depends on 1)

The glass composition of claim 1, wherein each of the at least two alkali metal oxides is present in the glass composition in an amount greater than or equal to 0.5 mol %.

### Claim 5 (depends on 1)

The glass composition of claim 1, wherein R2O comprises Na2O and Li2O, and a ratio of Na2O/Li2O is greater than or equal to 1.0.

### Claim 6 (depends on 1)

The glass composition of claim 1, wherein the R2O comprises K2O and Na2O, and a ratio of K2O/Na2O is greater than or equal to 1.0.

### Claim 7 (depends on 1)

The glass composition of claim 1, wherein R2O comprises at least three alkali metal oxides.

### Claim 8 (depends on 7)

The glass composition of claim 7, wherein each of the at least three alkali metal oxides is present in the glass composition in an amount greater than or equal to 0.5 mol %.

### Claim 9 (depends on 7)

The glass composition of claim 7, wherein
R2O comprises Li2O, Na2O, and K2O,
a ratio of K2O/Li2O is greater than or equal to 1.0, and
a ratio of K2O/Na2O is greater than or equal to 1.0.

### Claim 10 (depends on 9)

The glass composition of claim 9, wherein the ratio of K2O/Li2O is greater than or equal to 5.0.

### Claim 11 (depends on 1)

The glass composition of claim 1, wherein the glass composition comprises greater than or equal to 72.0 mol % SiO2.

### Claim 12 (depends on 1)

The glass composition of claim 1, wherein SiO2+Al2O3 is greater than 80.0 mol %.

### Claim 13 (depends on 1)

The glass composition of claim 1, comprising:
greater than or equal to 9.5 mol % Al2O3; and
less than or equal to 8.0 mol % Li2O.

### Claim 14 (depends on 1)

The glass composition of claim 1, wherein the glass composition comprises:
from greater than or equal to 70.0 mol % to less than or equal to 75.0 mol % SiO2; and
from greater than or equal to 8.0 mol % to less than or equal to 12.0 mol % Al2O3,
wherein R2O is greater than or equal to 16.0 mol %.

### Claim 15 (depends on 1)

The glass composition of claim 1, wherein the glass composition comprises:
from greater than or equal to 70.0 mol % to less than or equal to 75.0 mol % SiO2; and
from greater than or equal to 8.0 mol % to less than or equal to 12.0 mol % Al2O3, wherein
R2O comprises Li2O and Na2O, and
Li2O+Na2O is from greater than or equal to 14.0 mol % to less than or equal to 15.0 mol %.

### Claim 16 (depends on 1)

The glass composition of claim 1, wherein the glass composition comprises:
from greater than or equal to 70.0 mol % to less than or equal to 75.0 mol % SiO2; and
from greater than or equal to 8.0 mol % to less than or equal to 12.0 mol % Al2O3, wherein
R2O comprises Na2O and K2O, and
Na2O+K2O is from greater than or equal to 15.0 mol % to less than or equal to 21.0 mol %.

### Claim 17 (depends on 1)

The glass composition of claim 1, wherein the glass composition comprises:
from greater than or equal to 70.0 mol % to less than or equal to 75.0 mol % SiO2; and
from greater than or equal to 8.0 mol % to less than or equal to 12.0 mol % Al2O3, wherein
R2O comprises Li2O, Na2O, and K2O, and
Li2O+Na2O+K2O is from greater than or equal to 15.0 mol % to less than or equal to 21.0 mol %.

### Claim 18 (depends on 1)

The glass composition of claim 1, wherein the absolute value of the slope is less than or equal to |0.015|.

### Claim 19 (depends on 1)

The glass composition of claim 1, wherein the absolute value of the slope is less than or equal to |0.010|.

### Claim 20 (depends on 1)

A glass article formed from the glass composition of claim 1, comprising:
a first surface;
a second surface;
a central region positioned between the first surface and the second surface; and
a compressive stress layer extending from at least one of the first surface and the second surface into the central region of the glass article.

### Claim 21 (depends on 20)

A consumer electronic product, comprising:
a housing comprising a front surface, a back surface and side surfaces;
electrical components at least partially within the housing, the electrical components comprising at least a controller, a memory, and a display, the display at or adjacent the front surface of the housing; and
a cover substrate disposed over the display,
wherein at least a portion of the housing or the cover substrate comprises the glass article of claim 20.