Display apparatus using semiconductor light-emitting device

Abstract

Discussed is a plurality of semiconductor light-emitting devices, wherein at least one of the semiconductor light-emitting devices includes: a first conductive electrode and a second conductive electrode; a first conductive semiconductor layer having the first conductive electrode arranged thereon; a second conductive semiconductor layer overlapping the first conductive semiconductor layer and having the second conductive electrode arranged thereon; an active layer arranged between the first conductive semiconductor layer and the second conductive semiconductor layer; an intermediate layer arranged on the second conductive semiconductor layer; a protrusion, made of an electro-polishable porous material, on the intermediate layer; and an undoped semiconductor layer arranged between the intermediate layer and the protrusion. The intermediate layer includes a first layer including second conductive impurities and a second layer having a higher concentration of the second conductive impurities than the first layer, wherein the first layer and the second layer are sequentially and repetitively stacked.