2results about How to "Improve drop strength" patented technology

The present invention relates to chemically strengthened glass, a method for producing the same, and glass for chemical strengthening. A chemically strengthened glass is a plate-shaped chemically strengthened glass having a compressive stress layer on a glass surface, in which a compressive stress value (CS0) of the glass surface is 500 MPa or greater, a plate thickness (t) is 400 μm or greater, a compressive stress layer depth (DOL) is (t x 0.15) μm or greater, a compressive stress value (CS1) at a position at a depth of 1 / 4 of the DOL from the glass surface and a compressive stress value (CS2) at a position at a depth of 1 / 2 of the DOL from the glass surface are each 50 MPa or greater, m1 represented by {m1 = (CS1-CS2) / (DOL / 4-DOL / 2)} is -1.5 MPa / μm or greater, m2 represented by {m2 = CS2 / (DOL / 2-DOL)} is 0 MPa / μm or less, and m2 is less than m1.

The present invention relates to chemically strengthened glass, a method for producing the same, and glass for chemical strengthening. A chemically strengthened glass is a plate-shaped chemically strengthened glass having a compressive stress layer on a glass surface, in which a compressive stress value (CS0) of the glass surface is 500 MPa or greater, a plate thickness (t) is 400 μm or greater, a compressive stress layer depth (DOL) is (t x 0.15) μm or greater, a compressive stress value (CS1) at a position at a depth of 1 / 4 of the DOL from the glass surface and a compressive stress value (CS2) at a position at a depth of 1 / 2 of the DOL from the glass surface are each 50 MPa or greater, m1 represented by {m1 = (CS1-CS2) / (DOL / 4-DOL / 2)} is -1.5 MPa / μm or greater, m2 represented by {m2 = CS2 / (DOL / 2-DOL)} is 0 MPa / μm or less, and m2 is less than m1.