Strengthened glass with ultra deep depth of compression
First Claim
1. A glass article, the glass article comprising a thickness t and a compressive region having a compressive stress CSs in a range from about 400 MPa to about 1200 MPa at a surface of the glass article, wherein the compressive region extends from the surface to a depth of compression DOC, wherein 0.1·
- t≤
DOC≤
0.25·
t, and has a compressive stress profile, the compressive stress profile comprising;
a. a first portion b extending from the surface to a depth db below the surface and having a slope mb, wherein −
40 MPa/μ
m≥
mb≥
−
200 MPa/μ
m; and
b. a second portion c extending from about dc to the depth of compression DOC and having a slope mc, wherein −
0.4 MPa/μ
m≥
mc≥
−
3.0 MPa/μ
m.
1 Assignment
0 Petitions
Accused Products
Abstract
Chemically strengthened glass articles having at least one deep compressive layer extending from a surface of the article to a depth of compression DOC of at least about 125 μm within the glass article. The compressive stress profile includes a single linear segment or portion extending from the surface to the depth of compression DOC. Alternatively, the compressive stress profile may include an additional portion extending from the surface to a relatively shallow depth and the linear portion extending from the shallow depth to the depth of compression.
96 Citations
13 Claims
-
1. A glass article, the glass article comprising a thickness t and a compressive region having a compressive stress CSs in a range from about 400 MPa to about 1200 MPa at a surface of the glass article, wherein the compressive region extends from the surface to a depth of compression DOC, wherein 0.1·
- t≤
DOC≤
0.25·
t, and has a compressive stress profile, the compressive stress profile comprising;a. a first portion b extending from the surface to a depth db below the surface and having a slope mb, wherein −
40 MPa/μ
m≥
mb≥
−
200 MPa/μ
m; andb. a second portion c extending from about dc to the depth of compression DOC and having a slope mc, wherein −
0.4 MPa/μ
m≥
mc≥
−
3.0 MPa/μ
m. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- t≤
Specification