Patent ID: 6849473

Claim:
A method for manufacturing a semiconductor light-emitting device, comprising the steps of: stacking, one by one on one side of a surface of a first-conductive-type semiconductor substrate, a first-conductive-type first cladding layer, a first-conductive-type or second-conductive-type or an undoped active layer, a second-conductive-type second cladding layer, a second-conductive-type intermediate band gap layer and a second-conductive-type protective layer; removing a device center region of the second-conductive-type protective layer and a device center region of the second-conductive-type intermediate band gap layer, respectively, by etching; after the removal step of the second-conductive-type protective layer and intermediate band gap layer, stacking a current diffusion layer on the second-conductive-type protective layer arid the second-conductive-type second cladding layer to form, in the second-conductive-type current diffusion layer and the second-conductive-type second cladding layer, an energy band structure in which an upper-end position of valence band and a lower-end position of conduction band are in a type II relation; forming a first electrode overall on the other side of the surface of the first-conductive-type semiconductor substrate; and forming a second electrode over the device center region on the second-conductive-type current diffusion layer.