Patent ID: 9224917
Filing Date: 2015-12-29
Classification: H01L

Abstract:
1. A light emitting diode (LED), comprising: a support substrate; a first semiconductor layer disposed on the support substrate; a second semiconductor layer disposed on the first semiconductor layer; an active region disposed between the first and second semiconductor layers; and a photonic crystal structure embedded in the first semiconductor layer, wherein: the first semiconductor layer comprises a p-type contact layer and a p-type clad layer; the photonic crystal structure comprises a pattern of voids disposed on the support substrate; the pattern of voids are disposed at an interface between the p-type contact layer and the p-type clad layer; and a width and a height of each void of the pattern of voids is within a range of 50 to 200 nm, and a distance between two adjacent voids is within a range of 50 nm to 1 μm.