Patent ID: 8669129

Claim:
A method for producing a group III nitride semiconductor light-emitting device comprising a substrate; a buffer layer made of a group III nitride which is laminated on the substrate; an n-type semiconductor layer comprising a base layer which is laminated on the buffer layer; a light-emitting layer which is laminated on the n-type semiconductor layer, and a p-type semiconductor layer which is laminated on the light-emitting layer, wherein the substrate is pretreated with plasma: the buffer layer has a composition represented by Al x Ga 1-x N (0≦x<0.5) which is obtained as a single crystal by activating with plasma and reacting at least a metal gallium raw material and a gas containing a group V element; the base layer is formed on the buffer layer; and the substrate has a main surface comprising a planar C plane and two or greater convex portions formed on the planar C plane, and the buffer layer covers the main surface of the substrate, the method comprising the steps of: a pretreatment step in which the substrate is treated with plasma; a buffer layer formation step in which the buffer layer having a composition represented by Al x Ga 1-x N (0≦x<0.5) is formed as a single crystal on the pretreated substrate by activating with plasma and reacting at least a metal gallium raw material and a gas containing a group V element; and a base layer formation step in which the base layer is formed on the buffer layer.