Patent ID: 7727873

Claim:
A method for producing a gallium nitride-based compound semiconductor multilayer structure comprising a substrate having thereon an n-type semiconductor layer, a light-emitting layer and a p-type semiconductor layer, the light-emitting layer being disposed between the n-type semiconductor layer and the p-type semiconductor layer, and the light-emitting layer having a multiple quantum well structure formed by alternately stacking a well layer and a barrier layer, wherein at least one well layer has a non-uniform thickness, the barrier layer is grown through three steps of a same temperature as the well layer, a higher temperature than the well layer and a same temperature as the well layer, a temperature difference (T 2 −T 1 ) between a maximum growth temperature (T 2 ) of the barrier layer and a growth temperature (T 1 ) of the well layer is adjusted to be in a range from 160 to 200° C., and a temperature difference (T 3 −T 1 ) between a growth temperature (T 3 ) of the p-type semiconductor layer and the growth temperature (T 1 ) of the well layer is adjusted to be in a range from 240 to 280° C.