Patent ID: 9548420
Date: 2017-01-17
CPC Classifications: H01L

Claim:
1. A light-emitting device, comprising: a substrate comprising a top surface, a bottom surface, an inclined surface, and a side surface formed between the top surface and the bottom surface, wherein the inclined surface connects the top surface and the side surface, and the side surface connects the inclined surface and the bottom surface, wherein the inclined surface comprises a plurality of recesses; a light-emitting stack formed on a portion of the top surface of the substrate, wherein the light-emitting stack comprises a first conductivity-type semiconductor layer, a second conductivity-type semiconductor layer, and an active layer formed between the first conductivity-type semiconductor layer and the second conductivity-type semiconductor layer; and a plurality of first micro-structures protruded from the top surface of the substrate, wherein the inclined surface comprises a plurality of second micro-structures, the plurality of recesses of the inclined surface is connected with a micro-space formed between the plurality of second micro-structures.