Invention Grant
- Patent Title: Alkaline earth alumino-borosilicate crack resistant glass
- Patent Title (中): 碱土铝硼硅酸盐抗裂玻璃
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Application No.: US13291533Application Date: 2011-11-08
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Publication No.: US08796165B2Publication Date: 2014-08-05
- Inventor: Adam James Ellison , Timothy Michael Gross
- Applicant: Adam James Ellison , Timothy Michael Gross
- Applicant Address: US NY Corning
- Assignee: Corning Incorporated
- Current Assignee: Corning Incorporated
- Current Assignee Address: US NY Corning
- Agent Timothy M Schaeberle
- Main IPC: C03C3/091
- IPC: C03C3/091 ; C03C3/093

Abstract:
The present disclosure relates to glass articles for use as a touchscreen substrate or cover glass article for use in a portable electronic device, particularly an aluminoborosilicate glass being substantially free of alkalis, comprising at least 55 mol % SiO2, at least 5 mol % Al2O3 and at least one alkaline earth RO component. The alkali-free aluminoborosilicate exhibits an Al2O3+B2O3 to RO mol % ratio which exceeds 1 and an Al2O3 to RO mol % ratio which exceeds 0.65. The aluminoborosilicate glasses disclosed herein exhibits high damage resistance as evidenced by a Vickers median/radial crack initiation load which is greater than than 1000 gf, as well as a high scratch resistance of at least 900 gf, as measured by the lack of the presence of lateral cracks when a load is applied by a moving Knoop indenter.
Public/Granted literature
- US20120135852A1 ALKALINE EARTH ALUMINO-BOROSILICATE CRACK RESISTANT GLASS Public/Granted day:2012-05-31
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