Patent ID: 7327770

Claim:
A nitride semiconductor laser device comprising: a semiconductor laser element including a substrate made of a group III nitride semiconductor, a layered structure formed on a top surface of the substrate and made of a group III nitride semiconductor, and an electrode formed on a top surface of the layered structure; a support base for keeping the semiconductor laser element fixed in position; and a wire connected to the electrode to permit a drive electric current to be fed therethrough to the semiconductor laser element, wherein the substrate is fabricated from a wafer having a stripe-shaped dislocation-concentrated region, a low-dislocation region as a region other than the dislocation-concentrated region, and a stripe-shaped high-luminescence region formed in the low-dislocation region, wherein the substrate has a dislocation-concentrated region penetrating the substrate from the top surface to a bottom surface thereof and a low-dislocation region corresponding to an entire region of the substrate except the dislocation-concentrated region, wherein the layered structure has a stripe-shaped laser light waveguide region located above the low-dislocation region of the substrate, wherein the semiconductor laser element is fixed on the support base with a substrate-side surface of the semiconductor laser element facing the support base, wherein the wire is connected to the p-type electrode above the low-dislocation region, and wherein the stripe-shaped laser light waveguide region is located between a location where the wire is connected to the p-type electrode and the dislocation-concentrated region.