Patent ID: 8829543

Claim:
A semiconductor light emitting device comprising: a first type doped semiconductor layer having a mesa portion and a depression portion, wherein a thickness of the mesa portion is greater than a thickness of the depression portion; a second type doped semiconductor layer disposed on the mesa portion; a light emitting layer disposed between the first type doped semiconductor layer and the second type doped semiconductor layer, wherein the light emitting layer has a bottom surface facing towards the first type doped semiconductor layer; a first reflection layer disposed on the second type doped semiconductor layer; and a second reflection layer disposed on the first reflection layer and covering at least part of the first reflection layer, wherein the second reflection layer extends from above the mesa portion to nearing the depression portion, and downwards to a horizontal position lower than or at the same height with the bottom surface, and wherein a reflectance of the second reflection layer is greater than 98%; wherein when observing from the viewing direction perpendicular to the light emitting layer, at least part of the second reflection layer and the first reflection layer do not overlap.