Glass-based articles with improved stress profiles

1. A glass-based article comprising:

a glass-based substrate comprising opposing first and second surfaces defining a substrate thickness (t); and

a stress profile comprising:

a peak compressive stress (CS) greater than or equal to 700 MPa;

a peak tension (PT) less than or equal to 61 MPa;

a compressive stress at a knee (CS k ) in a range of greater than or equal to 25 MPa and less than or equal to 120 MPa;

a depth of compression (DOC) that is greater than or equal to 0.1 t;

a spike region extending from the first surface to a depth of layer of a spike region (DOL sp ), where DOL sp is greater than or equal to 4.5 micrometers; and

a stress slope of the spike region that is greater than or equal to 40 MPa/micrometer;

wherein a ratio of DOC/DOL sp is greater than or equal to 12 and less than or equal to 23.

2. The glass-based article of claim 1 , wherein t is greater than or equal to 0.35 mm and less than or equal to 1 mm.

3. The glass-based article of claim 1 , wherein the CS k is greater than or equal to 40 MPa.

4. The glass-based article of claim 1 , wherein the DOC is less than or equal to 0.18 t.

5. The glass-based article of claim 1 , wherein the DOL sp is less than or equal to 24 micrometers.

6. The glass-based article of claim 1 , comprising a merit index (MI) defined by CS*DOL sp *CS k *DOC/PT 0.5 , wherein the MI is in the range of greater than or equal to 3×10 6 to less than or equal to 30×10 6 MPa 2 μm 2 /MPa 0.5 .

7. The glass-based article of claim 1 , comprising a damage resistant force (DRF) ratio defined by CS*DOL sp /CS k *DOC, wherein the DRF is in the range of greater than or equal to 0.1 to less than or equal to 5.

8. The glass-based article of claim 1 , wherein the stress profile does not contain a region of negative second derivative of CS(t) at a depth of greater than or equal to DOL sp and less than or equal to DOC.

9. The glass-based article of claim 1 , wherein the DOL sp is less than or equal to 10 micrometers.

10. A consumer electronic product comprising:

a housing comprising a front surface, a back surface, and side surfaces;

electrical components provided at least partially within the housing, the electrical components comprising at least a controller, a memory, and a display, the display being provided at or adjacent the front surface of the housing; and

a cover disposed over the display;

wherein a portion of at least one of the housing and the cover comprises the glass-based article of claim 1 .

11. A glass-based article comprising:

a glass-based substrate comprising opposing first and second surfaces defining a substrate thickness (t);

a central composition at the center of the glass-based article comprising lithium;

a potassium (K) concentration profile that is substantially linear from a maximum K concentration to a point where the K concentration is less than or equal to 50% of the maximum K concentration; and

a stress profile comprising:

a peak compressive stress (CS), a peak tension (PT), a compressive stress at a knee (CS k ) in a range of greater than or equal to 25 MPa and less than or equal to 120 MPa; a depth of compression (DOC); and

a spike region extending from the first surface to a depth of layer of a spike region (DOL sp ), where DOL sp is greater than or equal to 0.005 t;

wherein a ratio of DOC/DOL sp is greater than or equal to 12 and less than or equal to 23.

12. The glass-based article of claim 11 , wherein the DOL sp is less than or equal to 0.013 t.

13. A consumer electronic product comprising:

a housing comprising a front surface, a back surface, and side surfaces;

electrical components provided at least partially within the housing, the electrical components comprising at least a controller, a memory, and a display, the display being provided at or adjacent the front surface of the housing; and

a cover disposed over the display;

wherein a portion of at least one of the housing and the cover comprises the glass-based article of claim 11 .

14. A glass-based article, comprising:

first and second surfaces defining a thickness (t), wherein the thickness is greater than or equal to 0.1 mm to less than or equal to 2 mm; and

a stress profile comprising:

a peak compressive stress (CS) greater than or equal to 800 MPa;

a peak tension (PT) less than or equal to 61 MPa;

a compressive stress at a knee (CS k ) greater than or equal to 25 MPa and less than or equal to 120 MPa;

a depth of compression (DOC) that is greater than or equal to 0.1 t;

a spike region extending from the first surface to a depth of layer of a spike region (DOL sp ), where DOL sp is greater than or equal to 7 μm;

wherein a ratio of DOC/DOL sp is greater than or equal to 12 and less than or equal to 23.

15. The glass-based article of claim 14 , wherein the CS is less than or equal to 1000 MPa.

16. The glass-based article of claim 14 , wherein the PT is greater than or equal to 30 MPa.

17. The glass-based article of claim 14 , wherein the DOC is less than or equal to 0.18 t.

18. The glass-based article of claim 14 , wherein the DOL sp is less than or equal to 10 μm.

19. The glass-based article of claim 14 , wherein a value of CS k /t is greater than or equal to 40 MPa/mm.

20. The glass-based article of claim 14 , wherein the glass-based article comprises lithium.

21. The glass-based article of claim 14 , wherein a stress slope of the spike region is greater than or equal to 40 MPa/μm.

22. A consumer electronic product comprising:

a housing comprising a front surface, a back surface, and side surfaces;

electrical components provided at least partially within the housing, the electrical components comprising at least a controller, a memory, and a display, the display being provided at or adjacent the front surface of the housing; and

a cover disposed over the display;

wherein a portion of at least one of the housing and the cover comprises the glass-based article of claim 14 .