ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,490,553, issued on Dec. 2, was assigned to SEOUL VIOSYS Co. LTD. (Ansan-si, South Korea).
"Ultraviolet light emitting diode" was invented by Ju Yong Park (Ansan-si, South Korea), Seong Gyu Jang (Ansan-si, South Korea), Kyu Ho Lee (Ansan-si, South Korea) and Joon Hee Lee (Ansan-si, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "An ultraviolet light-emitting diode includes: a substrate; an n-type semiconductor layer disposed on the substrate; a mesa disposed on the n-type semiconductor layer and including an active layer and a p-type semiconductor layer; an n-ohmic contact layer contacting the n-type semiconductor layer; a p-ohmic contact layer...