ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,550,514, issued on Feb. 10, was assigned to EPISTAR Corp. (Hsinchu, Taiwan).

"Light-emitting device with cavity between top electrode pad and protective layer" was invented by Yong-Yang Chen (Hsinchu, Taiwan), Chao-Hsing Chen (Hsinchu, Taiwan) and Chi-Shiang Hsu (Hsinchu, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A light-emitting device comprises a plurality of light-emitting elements, comprising a first group light-emitting elements and a second group light-emitting elements; a trench separating the plurality of light-emitting units; a first electrode pad covering the first group light-emitting elements and located on the trench; a second e...