Invention Grant
- Patent Title: Strengthened glass with deep depth of compression
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Application No.: US15332504Application Date: 2016-10-24
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Publication No.: US09676663B2Publication Date: 2017-06-13
- Inventor: Jaymin Amin , Benedict Osobomen Egboiyi , Jonathan David Pesansky , Kevin Barry Reiman , Rostislav Vatchev Roussev , Brian Paul Strines
- Applicant: CORNING INCORPORATED
- Applicant Address: US NY Corning
- Assignee: CORNING INCORPORATED
- Current Assignee: CORNING INCORPORATED
- Current Assignee Address: US NY Corning
- Agent John T. Haran
- Main IPC: C03C21/00
- IPC: C03C21/00 ; C03C3/091 ; C03C3/093 ; C03C3/095 ; C03C3/097 ; C03C4/18 ; C03C3/087 ; C03C3/04

Abstract:
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. The strengthened glass has a 60% survival rate when dropped from a height of 80 cm in an inverted ball drop test and an equibiaxial flexural strength of at least 10 kgf as determined by abraded ring-on-ring testing. Methods of achieving such stress profiles are also described.
Public/Granted literature
- US20170036952A1 STRENGTHENED GLASS WITH DEEP DEPTH OF COMPRESSION Public/Granted day:2017-02-09
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