US 12,134,579 B2
Coated articles with optical coatings having residual compressive stress
Shandon Dee Hart, Elmira, NY (US); Guangli Hu, Berkeley Heights, NJ (US); Charles Andrew Paulson, Painted Post, 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 Feb. 21, 2023, as Appl. No. 18/112,031.
Application 18/112,031 is a continuation of application No. 17/532,103, filed on Nov. 22, 2021, granted, now 11,618,711.
Application 17/532,103 is a continuation of application No. 16/474,388, granted, now 11,242,280, issued on Feb. 8, 2022, previously published as PCT/US2017/067332, filed on Dec. 19, 2017.
Claims priority of provisional application 62/440,682, filed on Dec. 30, 2016.
Prior Publication US 2023/0212063 A1, Jul. 6, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. B32B 15/04 (2006.01); B32B 17/06 (2006.01); C03C 3/085 (2006.01); C03C 3/091 (2006.01); C03C 3/095 (2006.01); C03C 17/22 (2006.01); C23C 14/00 (2006.01); C23C 14/06 (2006.01); C23C 14/08 (2006.01); C23C 14/10 (2006.01); C23C 14/35 (2006.01); G02B 1/11 (2015.01)
CPC C03C 17/225 (2013.01) [C03C 3/085 (2013.01); C03C 3/091 (2013.01); C03C 3/095 (2013.01); C23C 14/0042 (2013.01); C23C 14/0676 (2013.01); C23C 14/08 (2013.01); C23C 14/10 (2013.01); C23C 14/352 (2013.01); G02B 1/11 (2013.01); C03C 2217/281 (2013.01); C03C 2217/732 (2013.01); C03C 2217/78 (2013.01); C03C 2217/91 (2013.01); C03C 2218/155 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A coated article, comprising:
a glass-ceramic substrate; and
an optical coating on the glass-ceramic substrate, the optical coating comprising a compressively stressed layer and a compositional gradient layer,
wherein:
the compositional gradient layer extends from the compressively stressed layer to the glass-ceramic substrate;
at least a portion of the optical coating comprises a residual compressive stress of more than about 50 MPa;
the optical coating comprises a strain-to-failure of about 0.4% or more as measured by a Ring-on-Ring Tensile Testing Procedure;
the optical coating comprises a maximum hardness of 12 GPa or more as measured on the air-side surface by a Berkovich Indenter Hardness Test along an indentation depth of about 50 nm and greater; and
the coated article comprises an average photopic transmission of about 80% or greater.