Patent ID: 8900901
Filing Date: 2014-12-02
Classification: B82Y,H01L,H01S

Abstract:
1. A method for manufacturing a nitride semiconductor laser element comprising a substrate, a nitride semiconductor layer that is laminated on the substrate and that has a ridge on its surface, an insulating protective film, and an electrode that is electrically connected with the nitride semiconductor layer, wherein the nitride semiconductor layer includes an n-side semiconductor layer, an active layer and an p-side semiconductor layer laminated on the substrate, the method comprising: forming the ridge; forming a monocrystalline first film from side faces of the ridge to a top face of the nitride semiconductor layer on both sides of the ridge, the first film being one of AlN and Al forming a second film containing polycrystalline or an amorphous substance above the nitride semiconductor layer and over the first film thereby forming the insulating protective film, the second film being one of ZrO and SiO forming an additional protective film containing an amorphous substance on side faces of the nitride semiconductor layer, the additional protective film being made of material different from material of the first film or material of the second film the forming of the additional protective film including forming the additional protective film to be in direct contact with the side faces of the nitride semiconductor layer.