Patent ID: 8461619
Filing Date: 2013-06-11
Classification: H01L

Abstract:
1. An LED chip comprising: a substrate; a first type semiconductor layer, a light-emitting layer and a second type semiconductor layer formed on the substrate in sequence, a surface of the first type semiconductor layer away from the substrate comprising an exposed first area uncovered by the light-emitting layer and a second area covered by the light-emitting layer; a first electrode formed on the exposed first area of the substrate, a plurality of recesses being defined in the second area of the surface of the first type semiconductor layer, the recesses being spaced apart from each other and arranged in sequence in a direction away from the first electrode, depths of the recesses gradually decreasing following an increase of a distance between the recesses and the first electrode; and a second electrode formed on the second type semiconductor layer, when a voltage is applied between the first and second electrodes, electrons flowing from first electrode to the second electrode via the first type semiconductor layer, the light-emitting layer and the second type semiconductor layer.