Patent ID: 8368087

Claim:
A light emitting device having a vertical topology structure, comprising: a conductive support structure; a first electrode on the conductive support structure; a semiconductor structure comprising a p-type semiconductor layer on the first electrode, a light emitting layer on the p-type semiconductor layer and an n-type semiconductor layer on the light emitting layer; a light extraction structure comprising a plurality of holes arranged on the n-type semiconductor layer and a transparent layer contacting a plurality of unfilled holes, wherein the hole plurality of holes have a depth in the range of 0.3 μm to 5 μm; a second electrode on the semiconductor structure, the second electrode having a first width in a first direction; and a reflective layer located between the transparent layer and the second electrode, the reflective layer having the first width in the first direction, wherein the second electrode and the reflective layer overlap with each other across the first width, wherein a dielectric material is formed in the plurality of holes, the dielectric material located between the transparent layer and the n-type semiconductor layer, and wherein the transparent layer is disposed on an inner surface of the plurality of unfilled holes with a thickness smaller than a radius of the plurality of holes, and wherein the transparent layer is configured to enhance light emission efficiency of the device.