Patent ID: 8548285

Claim:
A method of manufacturing an optical sensor module, comprising the steps of: (a) producing an optical waveguide section; (b) producing a substrate section; and (c) coupling the optical waveguide section and the substrate section together, said step (a) including the steps of (a-1) forming a linear core for an optical path on a surface of an under cladding layer, and (a-2) then performing a die-molding process to form an over cladding layer for covering the core and at the same time to form groove portions for the positioning of the substrate section in an extended portion of the over cladding layer lying in an appropriate position relative to an end portion of the core and where the core is absent, said step (b) including the steps of (b-1) placing an optical element mounting pad on a substrate, (b-2) forming plate portions for fitting engagement with the groove portions in an appropriate position of the substrate relative to the optical element mounting pad, and (b-3) mounting an optical element on the optical element mounting pad, said step (c) including the step of (c-1) bringing the plate portions in the substrate section into fitting engagement with the groove portions in the optical waveguide section to integrate the optical waveguide section and the substrate section together.