Patent ID: 8610106

Claim:
A semiconductor light emitting device, comprising: an n-type semiconductor layer; a p-type semiconductor layer; and a light emitting part provided between the n-type semiconductor layer and the p-type semiconductor layer and including a first light emitting layer, the first light emitting layer including: a first barrier layer including a nitride semiconductor; a first well layer provided between the n-type semiconductor layer and the first barrier layer and including a nitride semiconductor; a first n-side intermediate layer provided between the first well layer and the first barrier layer and including a nitride semiconductor; and a first p-side intermediate layer provided between the first n-side intermediate layer and the first barrier layer and including a nitride semiconductor; an In composition ratio among group III elements in the first n-side intermediate layer decreasing along a first direction from the n-type semiconductor layer toward the p-type semiconductor layer, an In composition ratio among group III elements in the first p-side intermediate layer decreasing along the first direction, an average change rate along the first direction of the In composition ratio in the first p-side intermediate layer being lower than an average change rate along the first direction of the In composition ratio in the first n-side intermediate layer, and wherein a thickness of the first p-side intermediate layer is equal to or more than a thickness of the first n-side intermediate layer, and equal to or more than a thickness of the first well layer.