ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,490,570, issued on Dec. 2, was assigned to LUMILEDS SINGAPORE PTE. LTD. (Singapore).

"Thin-film LED array with low refractive index patterned structures" was invented by Toni Lopez (Vaals, Netherlands), Isaac Wildeson (Nashua, N.H.) and Erik William Young (San Jose, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Described are light emitting diode (LED) devices having a patterned dielectric layer on a substrate and methods for effectively growing epitaxial III-nitride layers on them. A nucleation layer, comprising a III-nitride material, is grown on a substrate before any patterning takes place. The patterned dielectric layer comprises a first plur...