US 12,448,523 B2
Stabilization of titanium oxide films for highly transparent coatings
Alejo Lifschitz Arribio, Redmond, WA (US); and Anthony Phan, Redmond, WA (US)
Filed by Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed on Dec. 28, 2022, as Appl. No. 18/147,581.
Claims priority of provisional application 63/299,266, filed on Jan. 13, 2022.
Prior Publication US 2023/0220214 A1, Jul. 13, 2023
Int. Cl. C09D 1/00 (2006.01); C09D 5/02 (2006.01); C09D 7/48 (2018.01); C09D 7/61 (2018.01); C09D 11/023 (2014.01); C09D 11/037 (2014.01); C09D 11/322 (2014.01); C09D 11/38 (2014.01); G02B 27/01 (2006.01)
CPC C09D 1/00 (2013.01) [C09D 5/02 (2013.01); C09D 7/48 (2018.01); C09D 7/61 (2018.01); C09D 11/023 (2013.01); C09D 11/037 (2013.01); C09D 11/322 (2013.01); C09D 11/38 (2013.01); G02B 27/0172 (2013.01); G02B 2027/0178 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A sol-gel material for overcoating surface-relief structures, the sol-gel material comprising:
a titanium (IV) precursor; and
a titanium oxide stabilizer including R3OC(O)OR4, R5C(O)OR6, or a combination,
wherein R3, R4, R5, and R6 include alkyl or alkene groups, and
wherein the sol-gel material, when coated onto a substrate and annealed at a temperature below about 300° C. for less than about 10 minutes, forms a coating with a refractive index in a range of 1.6-1.9 and an absorption for visible light less than about 0.1% per 100 nm.