Patent ID: 7408965

Claim:
A light-emitting device, comprising: a semiconductor substrate with a first conduction type; a mesa provided on the semiconductor substrate, the mesa including an active layer, a cladding layer with a second conduction type opposite to the first conduction type and a contact layer with the second conduction type, the active layer and the contact layer putting the cladding layer therebetween; a region, provided on the semiconductor substrate, for burying the mesa; and a semiconductor layer put between the cladding layer and the contact layer, wherein the cladding layer with the second conduction type is made of group III-V compound semiconductor material constituting aluminum (Al) and indium (In) for group III elements and arsenic (As) for a group V element, and wherein the semiconductor layer has a band gap wavelength shorter than a band gap wavelength of the cladding layer and longer than a band gap wavelength of the contact layer.