Granted Patent B2

US 12,338,159 · App. 18/403,845 · Granted Jun 24, 2025

Inventors: Peter Joseph Lezzi (Corning, NY); Richard Orr Maschmeyer (Corning, NY); John Christopher Thomas (Elmira, NY); Kevin Lee Wasson (Elmira, NY)

Assignee: CORNING INCORPORATED

C03B27/012B32B17/10036B60J1/001C03B27/016C03B27/04C03B27/0404C03B27/0413C03B27/044C03B27/048C03B27/052C03B27/0526C03B29/12C03B29/16C03B35/24C03C3/11C03C21/002Y10T428/315

Abstract

Claims (39)

1. A glass sheet for use in or on consumer electronic products, the glass sheet comprising:

glass comprising soda-lime glass, alkali aluminosilicate glass, alkali-containing borosilicate glass, alkali aluminophosphosilicate glass, or alkali aluminoborosilicate glass;

a first major surface opposite a second major surface with an interior region located therebetween;

wherein surface fictive temperature measured on the first major surface is at least 50° C. above a glass transition temperature of the glass of the glass sheet;

wherein an average thickness between the first and second major surfaces is less than 2 mm;

wherein an ion content and chemical constituency of at least a portion of both the first major surface and the second major surface is the same as an ion content and chemical constituency of at least a portion of the interior region;

wherein the first and second major surfaces are under compressive stress greater than 150 MPa and at least a portion of the interior region is under tensile stress.

2. The glass sheet of claim 1 , wherein the first and second major surfaces are flat to at least 50 μm total indicator run-out along a 50 mm profile of the first and second major surfaces.

3. The glass sheet of claim 1 , wherein the areas of the first and second major surfaces are at least 2500 mm 2 .

4. The glass sheet of claim 1 , wherein the glass of the glass sheet has a coefficient of thermal expansion greater than 40×10 −7 /° C.

5. The glass sheet of claim 1 , wherein thickness of the glass sheet is about 0.1 mm to about 1.5 mm.

6. The glass sheet of claim 5 , wherein the glass sheet further comprises a depth of compression that is greater than 17% of the thickness.

7. The glass sheet of claim 5 , wherein the glass sheet at the thickness thereof exhibits an average light transmission over a wavelength range from 400 nm to 780 nm of 85% or greater.

8. A glass sheet for use in or on consumer electronic products, the glass sheet comprising:

glass comprising soda-lime glass, alkali aluminosilicate glass, alkali-containing borosilicate glass, alkali aluminophosphosilicate glass, or alkali aluminoborosilicate glass;

a first major surface opposite a second major surface with an interior region located therebetween;

wherein surface fictive temperature measured on the first major surface is at least 50° C. above a glass transition temperature of the glass of the glass sheet;

wherein an average thickness between the first and second major surfaces is less than 2 mm;

wherein an ion content and chemical constituency of at least a portion of both the first major surface and the second major surface is the same as an ion content and chemical constituency of at least a portion of the interior region;

wherein the first and second major surfaces are under compressive stress greater than 150 MPa and at least a portion of the interior region is under tensile stress;

wherein stress within the glass sheet varies as a function of position relative to the first and second major surfaces, wherein the stress has a change of at least 200 MPa over a distance of less than 500 μm of thickness of the glass sheet.

9. The glass sheet of claim 8 , wherein the first and second major surfaces are flat to at least 50 μm total indicator run-out along a 50 mm profile of the first and second major surfaces.

10. The glass sheet of claim 8 , wherein the areas of the first and second major surfaces are at least 2500 mm 2 .

11. The glass sheet of claim 8 , wherein the glass of the glass sheet has a coefficient of thermal expansion greater than 40×10 −7 /° C.

12. The glass sheet of claim 10 , wherein thickness of the glass sheet is about 0.1 mm to about 1.5 mm.

13. The glass sheet of claim 12 , wherein the glass sheet at the thickness thereof exhibits an average light transmission over a wavelength range from 400 nm to 780 nm of 85% or greater.

14. The glass sheet of claim 12 , wherein the glass sheet further comprises a depth of compression that is greater than 17% of the thickness.

15. A glass sheet for use in or on consumer electronic products, the glass sheet comprising:

glass comprising soda-lime glass, alkali aluminosilicate glass, alkali-containing borosilicate glass, alkali aluminophosphosilicate glass, or alkali aluminoborosilicate glass;

a first major surface opposite a second major surface with an interior region located therebetween;

wherein surface fictive temperature measured on the first major surface is at least 50° C. above a glass transition temperature of the glass of the glass sheet;

wherein an average thickness between the first and second major surfaces is less than 2 mm;

wherein an ion content and chemical constituency of at least a portion of both the first major surface and the second major surface is the same as an ion content and chemical constituency of at least a portion of the interior region;

wherein the first and second major surfaces are under compressive stress greater than 150 MPa and at least a portion of the interior region is under tensile stress;

wherein the areas of the first and second major surfaces are at least 2500 mm 2 ; and

wherein the glass sheet further comprises a depth of compression that is greater than 17% of the thickness.

16. The glass sheet of claim 15 , wherein stress within the glass sheet varies as a function of position relative to the first and second major surfaces, wherein the stress has a change of at least 200 MPa over a distance of less than 500 μm of thickness of the glass sheet.

17. The glass sheet of claim 15 , wherein a surface roughness of the second major surface is between 0.2 and 1.5 nm Ra roughness.

18. The glass sheet of claim 15 , wherein the first and second major surfaces are flat to at least 50 μm total indicator run-out along a 50 mm profile of the first and second major surfaces.

Assignments (1)

Continuity (12)

References Cited (400)