Patent ID: 8294178
Filing Date: 2012-10-23
Classification: H01L

Abstract:
1. A light emitting device using a compound semiconductor, the light emitting device being a light emitting diode comprising: a substrate; an active layer formed on the substrate; an n-type current spreading layer formed on a bottom surface of the active layer, the n-type current spreading layer allowing electrons to be uniformly spread into the active layer; and a p-type current spreading layer formed on a top surface of the active layer, the p-type current spreading layer allowing holes to be uniformly spread into the active layer, wherein the n-type current spreading layer and the p-type current spreading layer include two or more unit current spreading layers, each of the unit current spreading layers includes a plurality of current guide layers which are formed of GaN, at least one of the plurality of current guide layers is doped with n-type or p-type impurity ions at a predetermined concentration, and at least one of the plurality of current guide layers is undoped, and a doped current guide layer and an undoped current guide layer are alternately stacked.