US 12,226,874 B2
Glass substrate and method for manufacturing same
Takeaki Ono, Tokyo (JP); and Koki Moriya, Tokyo (JP)
Assigned to AGC INC., Tokyo (JP)
Filed by AGC Inc., Tokyo (JP)
Filed on Jan. 7, 2022, as Appl. No. 17/571,184.
Application 17/571,184 is a continuation of application No. PCT/JP2020/025670, filed on Jun. 30, 2020.
Claims priority of application No. 2019-128071 (JP), filed on Jul. 10, 2019.
Prior Publication US 2022/0126416 A1, Apr. 28, 2022
Int. Cl. B24B 9/10 (2006.01); C03C 19/00 (2006.01)
CPC B24B 9/10 (2013.01) [C03C 19/00 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A glass substrate comprising:
a first major surface;
a second major surface that is opposite to the first major surface;
an end surface interposed between the first major surface and the second major surface;
a first boundary surface that is interposed between the first major surface and the end surface and connected to the end surface; and
a second boundary surface that is connected to the first major surface and the first boundary surface,
wherein the second boundary surface is a convex curved surface,
the second boundary surface has a radius of curvature R2 of 0.3 mm or larger and 2.0 mm or smaller,
a chip size in the second boundary surface is 0.08 mm or smaller, and
an angle θ1 formed by the second boundary surface and the first major surface is 15° or larger and 45° or smaller.