Patent ID: 8513683

Claim:
An optical integrated semiconductor light emitting device comprising: a nitride semiconductor substrate having first regions with a first average dislocation density and one second region having a second average dislocation density substantially higher than the first average dislocation density, two light emitting device structures formed such that one is located at each of said first regions, and a groove formed in a plurality of Group III-V nitride semiconductor layers formed over the substrate, the two light emitting device structures being formed of the plurality of Group III-V nitride semiconductor layers formed over the first regions and the groove being formed in the second region of the substrate between the light emitting device structures; and further wherein there is only one second region having a second average dislocation density higher than the first average dislocation density and it is located between the first regions of the substrate at which the two light emitting device structures are formed and the second region extends only partially through a depth of a buffer layer and an electrode is formed on a side of the substrate which is opposite a side at which the two light emitting device structures are formed, and further wherein there is an insulating layer covering the groove, the insulating layer extending in the groove through at least part of the buffer layer and extending up to ridge portions at which the two light emitting device structures are formed and electrodes are formed over the insulating layer at the ridge portions, wherein the ridge portions are tapered and limit a size of a current injection region, and further wherein the buffer layer is a substantially common planer layer that extends beneath the two light emitting device structures having a portion removed at the groove and the insulating layer extends to portions on each side of the second region of the buffer layer such that the insulating layer extends to portions of the buffer layer having fewer defects than the second region.