Patent ID: 8802458
Filing Date: 2014-08-12
Classification: H01S

Abstract:
1. A method of manufacturing a laser diode comprising: a first step of forming on a semiconductor substrate, three or more strip-like ridge sections in parallel with each other with a strip-like trench in between, the three or more strip-like ridge sections including at least a lower cladding layer, an active layer, and an upper cladding layer in this order from the semiconductor substrate side; a second step of forming a sacrificial layer that fills in at least an inside of the trench and that does not cover a whole top face of the ridge section, subsequently forming a wiring layer electrically connected to the upper cladding layer on the sacrificial layer according to needs, and forming a pad electrode electrically connected to the upper electrode through the wiring layer, in a region different from regions of both the ridge section and the trench; and a third step of removing the sacrificial layer.