US 11,905,203 B2
Glass, glass-ceramic and ceramic articles with graded protective coatings having hardness and strength
Kaveh Adib, Corning, NY (US); Guangli Hu, Berkeley Heights, NJ (US); William Joseph Hurley, Corning, NY (US); Dana Ianson, Westfield, PA (US); Lin Lin, Painted Post, NY (US); Santona Pal, Corning, NY (US); and James Joseph Price, Corning, NY (US)
Assigned to Corning Incorporated, Corning, NY (US)
Filed by CORNING INCORPORATED, Corning, NY (US)
Filed on Jan. 26, 2023, as Appl. No. 18/101,668.
Application 18/101,668 is a continuation of application No. 16/651,850, granted, now 11,591,258, previously published as PCT/US2018/053088, filed on Sep. 27, 2018.
Claims priority of provisional application 62/565,425, filed on Sep. 29, 2017.
Prior Publication US 2023/0167018 A1, Jun. 1, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. B32B 15/04 (2006.01); B32B 17/06 (2006.01); C03C 17/245 (2006.01); C03C 3/091 (2006.01); C03C 3/097 (2006.01); C03C 17/22 (2006.01)
CPC C03C 17/245 (2013.01) [C03C 3/091 (2013.01); C03C 3/097 (2013.01); C03C 17/225 (2013.01); C03C 2217/281 (2013.01); C03C 2217/29 (2013.01); C03C 2217/78 (2013.01); C03C 2217/91 (2013.01); C03C 2218/155 (2013.01)] 26 Claims
OG exemplary drawing
 
1. An article, comprising:
a substrate comprising a glass, glass-ceramic or ceramic composition and comprising a primary surface; and
a protective film disposed on the primary surface of the substrate,
wherein the protective film has a maximum hardness of greater than 12 GPa at a depth of 500 nanometers, as measured on the protective film disposed on the substrate,
wherein the protective film comprises a crack onset strain (COS) failure level of 0.5% or greater,
wherein the protective film comprises a metal oxynitride comprising a graded region that is graded such that an oxygen concentration in the film varies by 1.3 or more atomic %,
wherein the protective film further comprises a non-graded region, wherein the graded region is bounded by the primary surface of the substrate and the non-graded region,
wherein the oxygen concentration in the graded region decreases from the primary surface of the substrate to the non-graded region,
further wherein the substrate comprises an elastic modulus less than an elastic modulus of the protective film.