LIGHT EMITTING DEVICE, METHOD FOR MANUFACTURING LIGHT EMITTING DEVICE AND LIGHTING SYSTEM HAVING SAME

摘要

A light emitting device, according to one embodiment, may comprise: a substrate having a pattern part disposed on the upper surface thereof; a first buffer layer disposed on the substrate; a second buffer later disposed on the first buffer layer; a first conductive semiconductor layer disposed on the second buffer layer; an active layer disposed on the first conductive semiconductor layer; a second conductive semiconductor layer disposed on the active layer; and a void layer disposed on the first buffer layer corresponding to the pattern part of the substrate. By further forming a void on the buffer layer, the embodiment has the effect of more effectively preventing defects caused by a potential difference.