US 12,077,470 B2
Glass-based articles with improved fracture resistance
Xiaoju Guo, Pittsford, NY (US); Jennifer Lynn Hunt, Corning, NY (US); Peter Joseph Lezzi, Corning, NY (US); Rostislav Vatchev Roussev, Painted Post, NY (US); Charlene Marie Smith, Corning, NY (US); and Ross Johnson Stewart, Corning, NY (US)
Assigned to CORNING INCORPORATED, Corning, NY (US)
Filed by CORNING INCORPORATED, Corning, NY (US)
Filed on Apr. 5, 2023, as Appl. No. 18/131,154.
Application 18/131,154 is a continuation of application No. 17/485,911, filed on Sep. 27, 2021, granted, now 11,639,310.
Application 17/485,911 is a continuation of application No. 16/565,899, filed on Sep. 10, 2019, granted, now 11,130,705, issued on Sep. 28, 2021.
Claims priority of provisional application 62/729,735, filed on Sep. 11, 2018.
Prior Publication US 2023/0234884 A1, Jul. 27, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C03C 21/00 (2006.01); C03C 3/087 (2006.01); H05K 7/14 (2006.01)
CPC C03C 21/002 (2013.01) [C03C 3/087 (2013.01); H05K 7/14 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A glass-based article, comprising:
a first surface;
a second surface;
a thickness t,
a stress profile having a first compressive region extending from a first surface to a first depth of compression DOC1, a second compressive region extending from a second surface to a second depth of compression DOC2, and a tensile region extending from DOC1 to DOC2, and
a KIC of greater than or equal to 0.67 MPa·√(m), wherein KIC is the fracture toughness of a glass-based substrate having the same composition as the center of the glass-based article;
at least one of the first compressive region and second compressive region has a compressive-stress factor KCS,
the tensile region has a tensile stress factor KT, and

OG Complex Work Unit Math
wherein the glass-based article is non-frangible.