Patent ID: 8872204

Claim:
A light-emitting device comprising: a substrate; an adhesive layer on the substrate; a reflection layer on the adhesive layer; a second semiconductor layer on the reflection layer; a light-emitting layer on the second semiconductor layer; a first semiconductor layer on the light-emitting layer, wherein a thickness of the first semiconductor layer is H; a plurality of trenches through the first semiconductor layer, wherein a depth of one of the plurality of trenches is h; and a first conductive structure on the first semiconductor layer; wherein the depth of the trench h is greater than ⅓ of the thickness of the first semiconductor layer H; wherein the first conductive structure comprises a first electrode encompassing an edge region of the light-emitting device, and wherein a total area of all trenches in the first semiconductor layer is not greater than 50% of an area of a top surface of the first semiconductor layer.