Patent ID: 8796707
Filing Date: 2014-08-05
Classification: F21K,H01L

Abstract:
1. A light emitting device comprising: a substrate; a plurality of clusters disposed over a surface of the substrate; a first semiconductor layer disposed to contact and at least partially overlap upper surfaces of the plurality of clusters and to overlap the substrate, wherein the first semiconductor layer includes air gaps overlapping respective ones of the plurality of clusters; a second semiconductor layer disposed over the first semiconductor layer and the air gaps; and a light emitting structure over the second semiconductor layer, wherein the light emitting structure includes a first conductive semiconductor layer over the second semiconductor layer, an active layer over the first conductive semiconductor layer, and a second conductive semiconductor layer over the active layer, wherein the air gaps and respective ones of the plurality of clusters overlap one another along substantially vertical axes, wherein the clusters comprise at least one of MgN clusters or Mg clusters.