US 12,168,626 B2
Chemically strengthened glass and method for producing same
Kazuki Kanehara, Tokyo (JP); Eriko Maeda, Tokyo (JP); Takumi Umada, Tokyo (JP); and Kenji Imakita, Tokyo (JP)
Assigned to AGC Inc., Tokyo (JP)
Filed by AGC Inc., Tokyo (JP)
Filed on Jul. 1, 2021, as Appl. No. 17/305,169.
Application 17/305,169 is a continuation of application No. PCT/JP2020/000690, filed on Jan. 10, 2020.
Claims priority of application No. 2019-007184 (JP), filed on Jan. 18, 2019; and application No. 2019-142999 (JP), filed on Aug. 2, 2019.
Prior Publication US 2021/0323862 A1, Oct. 21, 2021
Int. Cl. B32B 15/04 (2006.01); B32B 17/06 (2006.01); C03C 3/085 (2006.01); C03C 3/087 (2006.01); C03C 3/093 (2006.01); C03C 4/14 (2006.01); C03C 21/00 (2006.01)
CPC C03C 21/002 (2013.01) [C03C 3/085 (2013.01); C03C 3/087 (2013.01); C03C 3/093 (2013.01); C03C 4/14 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A chemically strengthened glass, comprising:
a glass having a surface and a compressive stress layer formed on the surface,
wherein the glass has a compressive stress value (CS0) on the surface of 800 MPa or more, the glass has a sheet thickness (t) of 100 μm or more, the glass, before being chemically strengthened, has a surface resistivity of 1013.5Ω or less, the compressive stress layer has a depth (DOL) of (t×0.14) μm or more, and CSB>CSA>0, where DB is a depth of a maximum compressive stress value, the depth being in a range of 10 μm or more and not more than DOL from the surface; CSB is the compressive stress value at the depth DB; DA is a depth of a minimum compressive stress value, the depth being in a range of equal to or less than DB from the surface of the glass; and CSA is the compressive stress value at the depth DA.