Patent ID: 8809101

Claim:
A method for manufacturing a nitride semiconductor layer comprising: forming a first semiconductor layer of a first conductivity type including a nitride semiconductor on a foundation layer provided on a silicon substrate, the foundation layer including a plurality of GaN layers and a plurality of AlN layers, the GaN layers and the AlN layers being alternately stacked; forming, on the first semiconductor layer, a light emitting part including a plurality of barrier layers and a well layer provided between the barrier layers, the well layer including Ga 1−z1 In z1 N (0<z1≦1); forming, on the light emitting part, a second semiconductor layer of a second conductivity type different from the first conductivity type, the second semiconductor layer including a nitride semiconductor; and forming an In-containing layer at a position of at least one of first and second positions, the first position being between the first semiconductor layer and the light emitting part, the second position being between the second semiconductor layer and the light emitting part, the In-containing layer including a nitride semiconductor containing In with an In composition ratio different from the In composition ratio z1 included in the well layer and having a thickness not less than 10 nanometers and not more than 1000 nanometers, wherein the silicon substrate has an upward protrusion during the forming of the In-containing layer and the upward protrusion of the silicon substrate decreases towards flat when a temperature of the silicon substrate returns to room temperature after the forming of the In-containing layer.