Patent ID: 9318874
Filing Date: 2016-04-19
CPC Classification: H01S

Claim Text:
1. A semiconductor device comprising: a semiconductor layer stacked on a substrate, the semiconductor layer including an optical waveguide region; a stripe-shaped ridge formed on a surface of the semiconductor layer; a first electrode formed on an upper surface of the ridge, and including a flat portion having a flat surface substantially parallel to the upper surface of the ridge and sloped portions on both sides of the flat portion with each of the sloped portions having a sloped surface that is sloped with respect to the upper surface of the ridge; a protective film covering each side surface of the ridge and the sloped surface portions of the first electrode; and a second electrode electrically connected to the first electrode, and formed over the first electrode and the protective film so that an upper surface of a part of the second electrode is positioned lower than the upper surface of the ridge, wherein an inclination angle of the sloped surface of the first electrode is smaller than an inclination angle of a side surface of the ridge.