ALEXANDRIA, Va., April 15 -- United States Patent no. 12,604,558, issued on April 14, was assigned to LANDMARK OPTOELECTRONICS Corp. (Tainan City, Taiwan).

"Light detecting device having a gradient layer with multiple sublayers" was invented by Hung-Wen Huang (Tainan City, Taiwan), Yung-Chao Chen (Tainan City, Taiwan), Yi-Hsiang Wang (Tainan City, Taiwan) and Wei Lin (Tainan City, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A light detecting device includes a substrate that has a lattice constant. A buffer layer is disposed on the substrate. A gradient layer is formed on the buffer layer opposite to the substrate, and includes a plurality of sublayers that have respectively lattice constants each o...