Patent ID: 8314437

Claim:
A semiconductor light emitting device comprising: a substrate having a first face and a second face opposed to the first face; a first metal layer having a lower face facing to the first face of the substrate and an upper face; a stack film including a p-type nitride semiconductor layer having a lower face facing to the upper face of the first metal layer and an upper face, an active layer provided on the upper face of the p-type nitride semiconductor layer and including a multiquantum well structure of a nitride semiconductor, and an n-type nitride semiconductor layer having a lower face facing to the active layer and an upper face, an n-electrode provided in a first region of the upper face of the n-type nitride semiconductor layer; a p-electrode provided on the second face of the substrate; and a concave-convex region formed on a second region of the upper face of the n-type nitride semiconductor layer, the second region being outside the first region, the concave-convex region having first concavities and convexities that coexist with second concavities and convexities that are smaller than the first concavities and convexities, the first concavities and convexities having height differences of 1 to 3 μm, the second concavities and convexities having height differences of 300 nm or smaller.