Patent ID: 6807213
Filing Date: 2004-10-19
Classification: H01L,H01S

Abstract:
A semiconductor optical device apparatus comprising:a substrate; a compound semiconductor layer containing an active layer; a dielectric protection film having a stripe-shaped opening formed on the compound semiconductor layer; and a ridge type compound semiconductor layer having a smaller refractive index than the refractive index of the active layer, the ridge type compound semiconductor layer being formed as to cover the stripe-shaped opening, wherein the compound semiconductor layer, the dielectric protection film, and the ridge type compound semiconductor layer are formed on the substrate, and wherein the semiconductor optical device apparatus satisfies either or both of the following conditions (a) and (b): condition (a): a width (WC) at an opening center of the stripe-shaped opening is different from a width (WF) of the opening front end; and condition (b): a width (WC) at an opening center of the stripe-shaped opening is different from a width (WR) of the opening rear end.