US 12,291,479 B2
Textured glass articles and methods of making the same
Li-Wei Chou, Hsinchu (TW); Jiangwei Feng, Painted Post, NY (US); and Jhih-Wei Liang, Toufen (TW)
Assigned to CORNING INCORPORATED, Corning, NY (US)
Appl. No. 17/632,831
Filed by CORNING INCORPORATED, Corning, NY (US)
PCT Filed Aug. 6, 2020, PCT No. PCT/US2020/045086
§ 371(c)(1), (2) Date Feb. 4, 2022,
PCT Pub. No. WO2021/030122, PCT Pub. Date Feb. 18, 2021.
Claims priority of provisional application 62/886,109, filed on Aug. 13, 2019.
Prior Publication US 2022/0267196 A1, Aug. 25, 2022
Int. Cl. C03C 15/00 (2006.01); H05K 5/03 (2006.01); H05K 5/00 (2006.01)
CPC C03C 15/00 (2013.01) [H05K 5/03 (2013.01); H05K 5/0017 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of making a textured glass article, comprising:
etching an initial primary surface of a glass substrate having a thickness with a hydrofluoric acid-free etchant having a pH of about 3 or less; and
removing the etchant from the glass substrate,
wherein:
the etching is conducted from above ambient temperature to about 100° C. to form a textured region that is defined by a primary surface of the substrate and comprises a sparkle of 2% or less,
the etching comprises a plurality of batch cycles, and
one or more of:
the hydrofluoric acid-free etchant is spiked with hydrochloric acid (HCl) after a second of the plurality of batch cycles and is not spiked with hydrochloric acid (HCl) between a first and the second of the plurality of batch cycles;
the hydrofluoric acid-free etchant is spiked with citric acid following one or more of the plurality of batch cycles; or
the hydrofluoric acid-free etchant is spiked with iron (III) chloride hexahydrate following one or more of the plurality of batch cycles.