Patent ID: 8927306
Filing Date: 2015-01-06
Classification: H01L,H01S

Abstract:
1. A method for fabricating an edge-emitting optical semiconductor device, comprising: forming a first multiple quantum well (MQW) region on a substrate; forming a first mask over the first MQW region, the first mask defining a first ridge waveguide region extending in substantially a longitudinal direction between a first waveguide first end and a first waveguide second end; forming a first ridge waveguide corresponding to the first ridge waveguide region; forming a second mask consisting of a single dielectric material directly on the first ridge waveguide; performing a removal process through the second mask to remove portions of the first MQW region and substrate to produce a window extending in a depth direction from the first ridge waveguide to the substrate and through the first MQW region, the window defining a first waveguide etched end facet; applying an optical coating directly on the second mask and directly on the window to coat the first waveguide etched end facet, the optical coating consisting of no more than one layer of the dielectric material of the second mask; etching a first contact opening through the optical coating and the second mask to expose the first ridge waveguide; and applying a first metal region in contact with a portion of the first ridge waveguide exposed through the first contact window.