Patent ID: 7123639
Filing Date: 2006-10-17
Classification: H01S

Abstract:
1. A semiconductor optical device comprising: a first III–V compound semiconductor region including a base portion and a ridge portion, the base portion extending along a predetermined plane, and the ridge portion being provided on the base portion and having a top and a side; a semiconductor contact layer provided on the top of the ridge portion, the contact layer having first and second faces and a side, the first face being opposite to the second face, and the ridge portion, the first face of the semiconductor contact layer and the second face of the semiconductor contact layer being arranged in turn along a reference axis intersecting with the predetermined plane; an insulating layer provided on the base portion and ridge portion of the first III–V compound semiconductor region, the insulating layer including a wall portion and a cover portion, the cover portion being provided on the base portion, the wall portion having first to third regions, the second region being located between the first region and the third region, the first region being provided on the side of the ridge portion, the second region being provided on the whole side of the contact layer; and a conductive layer provided on the semiconductor contact layer and the insulating layer, the conductive layer covering the whole second face of the contact layer, wherein the conductive layer includes a barrier metal layer and an electrode provided on the barrier metal layer.