CPC C03C 21/002 (2013.01) [C03C 3/091 (2013.01); C03C 3/093 (2013.01); C03C 3/097 (2013.01); C03C 10/0027 (2013.01); H05K 5/0017 (2013.01); H05K 5/03 (2013.01)] | 17 Claims |
1. A glass-based article comprising:
a first surface and a second surface opposing the first surface defining a thickness (t); and
a concentration of a metal oxide that is both non-zero and varies along a thickness range from 0·t to 0.3·t;
a stress profile comprising a compressive stress (CS) region and a central tension (CT) region, the CS region extending from the first surface to a depth of compression (DOC); and
a surface compressive stress of 500 MPa or greater; wherein the DOC is greater than or equal to 0.16·t; and
the CT region has a maximum CT in the range from 71.5√(t) to 100/√(t), wherein the CT region is approximated by the equation Stress(x)=maximum CT−(((CTn·(n+1))/0.5n)·|(x/t)−0.5|n), wherein maximum CT is a maximum tension value, CTn is less than or equal to maximum CT and is a positive value in units of MPa, x is position along the thickness (t) in micrometers, and n is between 1.5 and 3.
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