ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,426,407, issued on Sept. 23, was assigned to ROOTS Co. Ltd. (Incheon, South Korea).
"Method of manufacturing a fluorescent substance" was invented by Sung Yoon Lee (Incheon, South Korea), Soon Min Kim (Incheon, South Korea) and Jong Woo Ha (Seoul, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method of manufacturing a fluorescent substance includes forming dicing trenches on one surface of a fluorescent substance wafer along lattice-shaped dicing lines, and a lower surface grinding operation (S6) of grinding a surface opposite to a surface of the wafer in which the dicing trenches are formed as much as a predetermined thickness using a d...