Chemical Tempered Glass, Manufacturing Method and Chemical Tempered Glass

摘要

It is a plate-shaped chemically strengthened glass having a compressive stress layer on the glass surface, the compressive stress value (CS ₀ ) of the glass surface is 500 MPa or more, the plate thickness (t) is 400 μm or more, and the compressive stress layer depth (DOL) is (t × 0.15) ㎛ or more, the compressive stress value at the point where the depth of the glass surface is a quarter of the DOL (CS ₁₎ and a compressive stress value at a point 1/2 (CS ₂₎ is more than 50MPa, respectively, _{{m 1 = (CS 1 -CS} 2) / (DOL / 4-DOL / 2)} m 1 represented by the -1.5MPa / ㎛ or _{more, {m 2 = CS 2 /} (DOL / 2-DOL)} Chemically strengthened glass in which m ₂ represented by 0 MPa / µm or less and m ₂ is smaller than m ₁ .