A display device according to the present invention is characterized by comprising: a base part; assembly electrodes extending in one direction and formed on the base part; a dielectric layer formed so as to cover the assembly electrodes; a barrier rib part stacked on the dielectric layer while forming holes so as to overlap the assembly electrodes; semiconductor light-emitting elements disposed inside the holes; and wiring electrodes electrically connected to the semiconductor light-emitting elements, wherein the assembly electrodes are formed so as to include Al, and the holes include AlOx.