Patent ID: 8410498

Claim:
A semiconductor light emitting device comprising: a first cladding layer of a first conduction type; a second cladding layer of a second conduction type; an active layer of the second conduction type provided between the first cladding layer and the second cladding layer; a diffusion control layer formed by sequentially stacking an intermediate layer of the second conduction type and a first transparent conductive layer of the second conduction type on the second cladding layer in this order, the intermediate layer being lattice matched with the first cladding layer; a second transparent conductive layer of the second conduction type, provided on the diffusion control layer and having an impurity in a concentration lower than an impurity concentration of the diffusion control layer; and a third transparent conductive layer of the second conduction type, provided on the second transparent conductive layer and having an impurity in a concentration higher than the impurity concentration of the second transparent conduction layer, wherein a boundary between the intermediate layer and the first transparent conductive layer is a lattice mismatch interface.