Patent ID: 7575949

Claim:
A method for producing a semiconductor photo-detection device comprising steps of: providing a photo-absorption part comprising a semiconductor multilayer structure including a photo-absorption layer on a substrate, the substrate having a top surface and an end surface meeting at an edge, wherein the edge is made of a semiconductor material; providing a light incident facet having an acute angle with said top surface; providing an V- or U-shaped groove in opposition to said light incident facet; providing an optical waveguide onto the V- or U-shaped groove and in opposition to said light incident facet, through an organic substance interposed between said light incident facet and said optical waveguide so that on optical coupling with said optical waveguide, a fiber tip of said optical waveguide facing said light incident facet does not contact said light incident facet; and completely removing said organic substance after optical coupling with said optical waveguide in order to obtain the device without an organic substance between said light incident facet and said optical waveguide.