Reinforced glass, and method for producing reinforced glass
Number of patents in Portfolio can not be more than 2000
United States of America
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Mar 11, 2025
Grant Date -
Dec 2, 2021
app pub date -
Oct 8, 2019
filing date -
Oct 8, 2019
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Abstract
A tempered glass has a surface and a thickness. When a compressive stress of the tempered glass is represented by a positive number and a tensile stress thereof is represented by a negative number, the compressive stress at the surface is 400 MPa or more, a stress profile of the tempered glass obtained by measuring a stress in a depth direction from the surface has inflection points at each of which a second derivative of the stress profile becomes zero between the surface and a depth equal to half of the thickness, and the compressive stress value at a first inflection point at a position closest to the surface among the inflection points is 150 MPa or less. The compressive stress at a second inflection point at a position deeper than the first inflection point is 45 MPa or less.
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