Patent ID: 8686433

Claim:
A light emitting device, comprising: a light emitting layer; a substrate that is transparent to an emission wavelength of the light emitting layer and positioned to receive an emission wavelength from the light emitting layer; a convex pattern including a collection of a plurality of convex portions discretely arranged on a front surface of the substrate with a first pitch; an n type nitride semiconductor layer located on the front surface of the substrate to cover the convex pattern, the light emitting layer located on the n type semiconductor layer; and a p type nitride semiconductor layer located on the light emitting layer, wherein each of the convex portions includes a sub convex pattern comprising a plurality of fine convex portions discretely arranged at the top of the convex portion with a second pitch and a base supporting the sub convex pattern, the second pitch being smaller than the first pitch, the n type nitride semiconductor layer is formed to span between tops of the fine convex portions without filling spaces between any adjacent two of the fine convex portions, and the light emitting device includes spaces partitioned by the fine convex portions and the n type nitride semiconductor layer spanning between the tops of the fine convex portions.