Patent ID: 7053420

Claim:
A GaN group semiconductor light-emitting element having an element structure comprising a first crystal layer, which is a sapphire substrate processed to have concaves and convexes on its surface wherein the concaves have a depth of 0.2 μm to 5 μm, a second crystal layer directly formed thereon or formed via a buffer layer, burying the concaves and convexes, said second crystal layer being made from a GaN group semiconductor material having a different refractive index from the aforementioned crystal layer, wherein the second crystal layer is grown from each of the concaves and convexes processed on the surface of the crystal substrate, while forming a facet structure comprising a facet plane which bends the dislocation line extending in the C-axis direction from the substrate in the second crystal layer into the lateral direction, and continuously grown to make the surface flat, and a semiconductor crystal layer comprising a light-emitting layer laminated thereon.