STRENGTHENED GLASS WITH DEEP DEPTH OF COMPRESSION

摘要

Chemically strengthened glass articles having at least one deep compressive layer extending from a surface of the article to a depth of at least about 45 μm within the article are provided. In one embodiment, the compressive stress profile includes a single linear segment extending from the surface to the depth of compression DOC. Alternatively, the compressive stress profile includes two linear portions: the first portion extending from the surface to a relatively shallow depth and having a steep slope; and a second portion extending from the shallow depth to the depth of compression. Methods of achieving such stress profiles are also described.

主权项

1. A glass article, the glass article having a compressive region having a compressive stress CSs of at least about 150 MPa at a surface of the glass article, wherein:
a. the compressive region extends from the surface to a depth of compression DOC of at least about 45 μm and has a compressive stress profile; and b. the compressive region has a compressive stress profile having a first portion a extending to a depth da of at least about 45 μm from the surface and having a slope ma, wherein 2 MPa/μm≦ma≦8 MPa/μm, and optionally a second portion a′ extending from the surface to a depth da′ of at least about 3 μm, wherein 40 MPa/μm≦ma′≦200 MPa/μm.