Patent ID: 8470627

Claim:
A method for manufacturing a semiconductor light emitting device, the device including: an n-type semiconductor layer; a p-type semiconductor layer; and a light emitting unit provided between the n-type semiconductor layer and the p-type semiconductor layer, the method comprising: forming a first buffer layer made of a crystalline AIN on a first substrate, forming a second buffer layer made of a crystalline Al x Ga 1-x N (0.8≦x≦1) on the first buffer layer, and forming a GaN layer on the second buffer layer; stacking the n-type semiconductor layer, the light emitting unit, and the p-type semiconductor layer on the GaN layer; and separating the first substrate, wherein the p-type semiconductor layer includes a first p-type layer provided on the light emitting unit and a p-type contact layer provided on the first p-type layer, and the first p-type layer is Mg-doped p-type AlGaN formed to have a concentration profile including a higher Mg concentration on a side of the light emitting unit and a lower Mg concentration on a side opposite to the light emitting unit, so that a piezoelectric field in the first p-type layer is canceled by the concentration profile.