Patent ID: 9281444
Filing Date: 2016-03-08
CPC Classification: H01L

Claim Text:
1. A light emitting device comprising: a substrate; 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; a n type nitride semiconductor layer formed on the front surface of the substrate to cover the convex pattern; a light emitting layer formed on the n type semiconductor layer, the substrate being transparent to an emission wavelength of the light emitting layer and positioned to receive light from the light emitting layer; a p type nitride semiconductor layer formed on the light emitting layer; a recess extending through at least the p type nitride semiconductor layer and the light emitting layer, the recess exposing an exposed portion of the n type nitride semiconductor layer; a p side electrode that is electrically connected to the p type nitride semiconductor layer, the p side electrode including: a n side electrode formed on the exposed portion of the n type nitride semiconductor layer, the n side electrode including: wherein the convex pattern further includes, for each of the convex portions, a sub convex pattern comprising a plurality of fine convex portions discretely arranged at the top of the respective convex portion with a second pitch, and a base supporting the sub convex pattern, the second pitch being smaller than the first pitch, and wherein the n type nitride semiconductor layer spans between tops of the fine convex portions without filling spaces between adjacent 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.