Patent ID: 8809833

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 connected to the n-type nitride semiconductor layer; a p-electrode provided on the second face of the substrate; and a concave-convex region provided on the upper face of the n-type nitride semiconductor layer, the concave-convex region having first concavities and convexities and second concavities and convexities that are smaller than the first concavities and convexities, the first concavities and convexities randomly coexisting with the second concavities and convexities, the first concavities and convexities having height differences of 1 to 3 μm, and the second concavities and convexities having height differences of 300 nm or smaller.