公开(公告)号：US20190062206A1

公开(公告)日：2019-02-28

申请号：US16173416

申请日：2018-10-29

Applicant: AGC Inc.

Inventor： Satoshi OGAMI ,  Yoshitaka SAIJO

IPC: C03C21/00

Abstract: A strengthened glass plate includes: a first functional layer that is provided in a first main surface of the strengthened glass plate; and a second functional layer that is provided in a second main surface of the strengthened glass plate. When a stress in a tensile stress layer is designated as CT, the following relation regarding the CT is satisfied: CT>0.8×[−38.7×ln(t/1000)+48.2], where t is a plate thickness [μm], CS is a compressive stress [MPa] in an outermost surface, and DOL is a depth [μm] from a glass surface to a point where the compressive stress reaches zero in a thickness direction.