Title:
ION EXCHANGED GLASSES VIA NON-ERROR FUNCTION COMPRESSIVE STRESS PROFILES
Document Type and Number:
WIPO Patent Application WO/2013/130653
Kind Code:
A3
Abstract:
Glasses with compressive stress profiles that allow higher surface compression and deeper depth of layer (DOL) than is allowable in glasses with stress profiles that follow the complementary error function at a given level of stored tension. In some instances, a buried layer or local maximum of increased compression, which can alter the direction of cracking systems, is present within the depth of layer. These compressive stress profiles are achieved by a three step process that includes a first ion exchange step to create compressive stress and depth of layer that follows the complimentary error function, a heat treatment at a temperature below the strain point of the glass to partially relax the stresses in the glass and diffuse larger alkali ions to a greater depth, and a re-ion-exchange at short times to re-establish high compressive stress at the surface.
Inventors:
BOOKBINDER DANA CRAIG (US)
FIACCO RICHARD MICHAEL (US)
GROSS TIMOTHY MICHAEL (US)
LOGUNOV STEPHAN LVOVICH (US)
FIACCO RICHARD MICHAEL (US)
GROSS TIMOTHY MICHAEL (US)
LOGUNOV STEPHAN LVOVICH (US)
Application Number:
PCT/US2013/028079
Publication Date:
October 24, 2013
Filing Date:
February 27, 2013
Export Citation:
Assignee:
CORNING INC (US)
BOOKBINDER DANA CRAIG (US)
FIACCO RICHARD MICHAEL (US)
GROSS TIMOTHY MICHAEL (US)
LOGUNOV STEPHAN LVOVICH (US)
BOOKBINDER DANA CRAIG (US)
FIACCO RICHARD MICHAEL (US)
GROSS TIMOTHY MICHAEL (US)
LOGUNOV STEPHAN LVOVICH (US)
International Classes:
C03C23/00; C03C21/00
Domestic Patent References:
| WO2010002477A1 | 2010-01-07 | |||
| WO2013016157A1 | 2013-01-31 |
Foreign References:
| US20100009154A1 | 2010-01-14 |
Attorney, Agent or Firm:
SANTANDREA, Robert P (Intellectual Property DepartmentSP-TI-3-, Corning New York, US)
Download PDF: