Patent ID: 7118294

Claim:
An optical semiconductor module comprising: an optical transmission channel including a waveguide which transmits a light beam, and an end at which a part of the waveguide is exposed; a holding member including a surface, the holding member mechanically holding the optical transmission channel with the end of the optical transmission channel being exposed from the surface; an optical semiconductor element, being mounted above the surface of the-holding member including an active area to emit or receive a light beam and an electrode pad being electrically connected to an electric wiring, the active area being optically coupled to the waveguide at the end of the optical transmission channel; and a three-layer film interposed between the optical semiconductor element and the optical transmission channel, the three-layer film including an insulation layer, a wiring layer and an adhesive layer, the three-layer film including a plurality of openings each corresponding to an optically coupling portion between the active area of the optical semiconductor element and the waveguide of the optical transmission channel, the adhesive layer being adhered to the surface of the holding member, the wiring layer being electrically connected to an electrode pad of the optical semiconductor element, a portion of the end of the optical transmission channel being pressed against the wiring layer or the insulation layer.