Invention Grant
- Patent Title: Glasses having improved drop performance
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Application No.: US15617302Application Date: 2017-06-08
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Publication No.: US11059744B2Publication Date: 2021-07-13
- Inventor: Pascale Oram , Vitor Marino Schneider
- Applicant: CORNING INCORPORATED
- Applicant Address: US NY Corning
- Assignee: CORNING INCORPORATED
- Current Assignee: CORNING INCORPORATED
- Current Assignee Address: US NY Corning
- Agent Jeffrey A. Schmidt
- Main IPC: C03C21/00
- IPC: C03C21/00 ; C03C3/097 ; C03C4/18 ; G06F1/16 ; C03C23/00

Abstract:
Chemically strengthened glass articles exhibiting superior resistance to damage when dropped onto an abrasive surface. The strengthened glass article has a stress profile in which the compressive and tensile stresses within the article vary as a function of the thickness t of the glass article. The stress profile has a first region extending from the surface of the glass article to a depth d1 into the glass, wherein d1≤0.025t or ≤20 μm and has a maximum compressive stress of at least about 280 MPa at the surface, a second region extending from a depth of at least d1 to a second depth d2 and having a local compressive stress maximum, and a third region extending from a third depth d3 in the glass to a depth of compression DOC, wherein d2≤d3 and DOC≤0.15t. A method of strengthening a glass article to provide resistance to damage when dropped is also provided.
Public/Granted literature
- US20170355640A1 GLASSES HAVING IMPROVED DROP PERFORMANCE Public/Granted day:2017-12-14
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