Patent ID: 8823016

Claim:
A semiconductor light emitting device, comprising: a first semiconductor layer including a layer of a first conductivity type and having a first major surface; a second semiconductor layer including a layer of a second conductivity type different from the first conductivity type; and a light emitting layer provided between the first semiconductor layer and the second semiconductor layer, the first major surface being on a side of the first semiconductor layer opposite to the light emitting layer, the first semiconductor layer having a plurality of structural bodies provided in the first major surface, each of the structural bodies being a recess provided on the first major surface with a protrusion provided between the structural bodies, or each of the structural bodies being a protrusion provided on the first major surface with a recess provided between the structural bodies, the structural bodies including a first structural body and a second structural body nearest the first structural body when viewed along a first axis perpendicular to the first major surface, a configuration of the first structural body when viewed along the first axis having a first centroid, a configuration of the second structural body when viewed along the first axis having a second centroid, the first centroid aligning with the second centroid along a second axis perpendicular to the first axis, and hb, rb, and Rb satisfying rb /(2 ·hb )≦0.7, and rb/Rb< 1, where hb is a depth of the recess, rb is a width of a bottom portion of the recess along the second axis, and Rb is a width of the protrusion along the second axis.