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Strengthened glass articles and methods of making

  • US 8,415,013 B2
  • Filed: 04/20/2012
  • Issued: 04/09/2013
  • Est. Priority Date: 08/08/2008
  • Status: Active Grant
First Claim
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1. A strengthened glass article, the strengthened glass article having a thickness t<

  • 0.5 mm and comprising;

    an outer region having a depth of layer of at least 30 μ

    m and a compressive stress of at least 600 MPa,an inner region, wherein the inner region is under a central tension CT, and wherein CT(MPa)>

    15.7 (MPa/mm)·

    t(mm)+52.5 (MPa) and wherein the strengthened glass article has a frangibility index of less than 3.

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