Patent ID: 8379682
Filing Date: 2013-02-19
Classification: B82Y,H01S

Abstract:
1. A nitride semiconductor laser chip comprising: an active layer comprising a nitride semiconductor; a nitride semiconductor layer above the active layer and comprising a p-type nitride semiconductor; a ridge portion formed in a part of the nitride semiconductor layer; and an electrically conductive film above the nitride semiconductor layer and having a light-absorbing property, wherein the electrically conductive film is at least in a region outside the ridge portion and in contact with the ridge portion, wherein a carrier concentration on a surface of the nitride semiconductor layer at a side surface of the ridge portion and a carrier concentration on a surface of the nitride semiconductor layer in a region outside the ridge portion are both 1×10 wherein the ridge portion has a ridge width of about 2 μm to about 6 μm.