US 12,145,879 B2
Chemically strengthened glass plate, and cover glass and electronic device comprising chemically strengthened glass
Takumi Umada, Tokyo (JP); Kenji Imakita, Tokyo (JP); Yusuke Arai, Tokyo (JP); and Qing Li, Tokyo (JP)
Assigned to AGC Inc., Tokyo (JP)
Filed by AGC Inc., Tokyo (JP)
Filed on Jun. 4, 2021, as Appl. No. 17/339,088.
Application 17/339,088 is a continuation of application No. PCT/JP2019/047189, filed on Dec. 3, 2019.
Claims priority of application No. 2018-231776 (JP), filed on Dec. 11, 2018.
Prior Publication US 2021/0292225 A1, Sep. 23, 2021
Int. Cl. B32B 15/04 (2006.01); B32B 17/06 (2006.01); C03C 3/083 (2006.01); C03C 10/00 (2006.01)
CPC C03C 3/083 (2013.01) [C03C 10/0027 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A chemically strengthened glass sheet, wherein the chemically strengthened glass sheet has a value of SB/(SA×t) of 5.0 mm−1 or more, where SA (MPa·μm) is an integrated value of a compressive stress from a surface of the glass sheet to a depth of 10 μm, SB (MPa·μm) is an integrated value of a compressive stress from the depth of 10 μm to DOL which is a depth at which the compressive stress is zero, t (mm) is a thickness of the glass sheet, and SA is 4,000 MPa·μm or less and SB is 12,000 MPa·μm or more.