US Patent Issued to Meta Platforms Technologies on Aug. 19 for "Coating composition and planarization of high refractive index overcoat on gratings" (Washington Inventors)

ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,392,940, issued on Aug. 19, was assigned to Meta Platforms Technologies LLC (Menlo Park, Calif.).

"Coating composition and planarization of high refractive index overcoat on gratings" was invented by Keren Zhang (Kirkland, Wash.) and Ankit Vora (Bothell, Wash.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical device includes an overcoat layer on a surface-relief grating. The overcoat layer is formed by a process including: depositing a layer of a first resin material that is curable by heat or electromagnetic radiation on a surface-relief grating that includes a plurality of grating ridges and a plurality of grating grooves to at least partially...