Patent ID: 7247985

Claim:
A semiconductor light-emitting device comprising: a semiconductor substrate; a light-emitting layer formed on the semiconductor substrate; a current-blocking layer formed on a part of the light-emitting layer for restricting light-emission; a current-spreading layer formed on the current-blocking layer and the other part of the light-emitting layer; a front electrode formed on the current-spreading layer; a rear electrode formed on a rear side of the semiconductor substrate, wherein the current-blocking layer is composed of a central region and an outer region which surrounds the central region via a part of the current-spreading layer, so that a light-emitting region that appears on a front surface of the device has an annular shape; wherein the front electrode and the central region of the current-blocking layer are opposed to each other, wherein the light-emitting region has a circularly annular shape, and the front electrode has a circular shape; and wherein a difference in radius between outer perimeters of the circularly annular light-emitting region and the circular front electrode is 7.1 to 10.7 times the thickness of the current-spreading layer.