US 12,227,447 B2
Coating film-attached glass, production method therefor, and modified glass substrate
Masamichi Wada, Osaka (JP); and Atsushi Ishikawa, Osaka (JP)
Assigned to NIPRO CORPORATION, Osaka (JP)
Appl. No. 17/618,618
Filed by NIPRO CORPORATION, Osaka (JP)
PCT Filed Jun. 12, 2020, PCT No. PCT/JP2020/023185
§ 371(c)(1), (2) Date Dec. 13, 2021,
PCT Pub. No. WO2020/251009, PCT Pub. Date Dec. 17, 2020.
Claims priority of application No. 2019-110916 (JP), filed on Jun. 14, 2019.
Prior Publication US 2022/0250970 A1, Aug. 11, 2022
Int. Cl. C03C 17/22 (2006.01); C03C 3/06 (2006.01); C03C 3/091 (2006.01)
CPC C03C 17/22 (2013.01) [C03C 3/06 (2013.01); C03C 3/091 (2013.01); C03C 2217/28 (2013.01); C03C 2218/153 (2013.01); C03C 2218/31 (2013.01)] 12 Claims
OG exemplary drawing
 
1. Coating film-attached glass, comprising: a glass substrate; and a coating film provided on at least a part of a surface of the glass substrate,
wherein a region from the surface of the glass substrate on the coating film side to a predetermined depth is a modified layer,
a content of B2O3 in the modified layer is less than that in a region deeper than the modified layer, by mass % in terms of an oxide, and a content of Na2O in the modified layer is less than that in the region deeper than the modified layer, by mass % in terms of an oxide,
the modified layer contains at least 1 to 8 mass % of B2O3, 1 to 6 mass % of Na2O, and 80 mass % or more of SiO2, in terms of an oxide, and
the region deeper than the modified layer contains at least 9 to 15 mass % of B2O3, 3 to 9 mass % of Na2O, and 70 mass % or more of SiO2, in terms of an oxide.