Patent ID: 8223814
Filing Date: 2012-07-17
Classification: H01S

Abstract:
1. A semiconductor laser comprising: a plurality of band-shaped ridges disposed in parallel to one another via band-shaped trenches and each including, at least, a lower cladding layer, an active layer, and an upper cladding layer in this order; an upper electrode formed on the top surface of each of the ridges and electrically connected to the upper cladding layer; a wiring layer electrically connected to the upper electrode and disposed in the air at least above the trench; and a pad electrode formed in at least one of two regions sandwiching the ridges and the trenches from sides and electrically connected to the upper electrode via the wiring layer, wherein the wiring layer in a portion above the trench has a flat shape or a concave shape which dents toward the trench, and has an uppermost layer, an Au layer, and a strain suppression layer for suppressing occurrence of a strain in the Au layer.