Patent ID: 7985972

Claim:
A semiconductor light emitting device having a protrusion and recess structure, the device comprising: a lower clad layer disposed on a substrate; an active layer formed on one portion of a top surface of the lower clad layer; an upper clad layer formed on the active layer; a first electrode formed on the upper clad layer; and a second electrode that is formed on a protrusion and recess structural pattern region having a plurality of recesses and a plurality of protrusions so as to fill the recesses, the protrusion and recess structural pattern region being formed on a portion of the top surface of the lower clad layer not occupied by the active layer, wherein the second electrode surrounds the portion of the top surface of the lower clad layer occupied by the active layer, wherein the vertical section of each of the recesses has a trapezoidal shape and the upper surface of each of the protrusions is substantially planar.