Patent ID: 7567605
Filing Date: 2009-07-28
Classification: H01L,H01S

Abstract:
1. A semiconductor laser device comprising: a semiconductor substrate having a principal surface; a semiconductor element layer, formed on said principal surface of said semiconductor substrate, having a principal surface substantially inclined with respect to said principal surface of said semiconductor substrate; and a growth inhibiting portion arranged on a prescribed region of said principal surface of said semiconductor substrate, wherein said semiconductor element layer includes a first semiconductor layer formed on said semiconductor substrate, an emission layer formed on said first semiconductor layer and a second semiconductor layer formed on said emission layer, said second semiconductor layer has a projection portion functioning as a current path toward said emission layer, said growth inhibiting portion includes a defect concentration region, the thickness of a portion of said first semiconductor layer close to said growth inhibiting portion is larger than the thickness of the remaining portion of said first semiconductor layer, said projection portion is formed on an inclined region of said principal surface substantially inclined with respect to said principal surface of said semiconductor substrate, and at least the thickness of said emission layer close to said projection portion of said semiconductor element layer is substantially uniform and the thickness of said first semiconductor layer close to said projection portion of said semiconductor element layer varies in a plane perpendicular to an emission direction of a laser.