EP3404726

An ultraviolet light-emitting device according to one embodiment comprises: a substrate; a first conductive type semiconductor layer disposed on the substrate; a mesa disposed on the first conductive type semiconductor layer and including a second conductive type semiconductor layer and an active layer disposed between the first and second conductive type semiconductor layers; a first contact electrode contacting the exposed first conductive type semiconductor layer around the mesa; a second contact electrode contacting the second conductive type semiconductor layer on the mesa; a passivation layer covering the first contact electrode, the mesa, and the second contact electrode and having openings disposed above the first and second contact electrodes; and first and second bump electrodes electrically connected to the first and second contact electrodes through the openings of the passivation layer, wherein the mesa has a plurality of depressions when viewed from above, and the first and second bump electrodes cover the openings of the passivation layer and a part of the passivation layer.